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EX1629 Introduction 

23 

from  the  theoretical  strain  is  then  considered  to  be  due  to  lead  wire  desensitization,  and  a 
compensation  factor  is  determined.  However,  some  strain  purists  argue  that  shunt  calibration  is 
actually meant to be a verification step and should not be used for this purpose. What is needed, 
then,  is  an  automated  way  to  determine  the  lead  wire  desensitization  error  without  using  shunt 
calibration.  This  can  be  accomplished  using  the  vtex1629_set_lead_wire_resistance  and 
vtex1629_set_half_bridge_lead_wire_desensitization  functions.  An  additional  API  is  available  to 
help 

measure 

the 

lead 

wire 

resistance, 

beginning 

with 

firmware 

version 

1.0: 

vtex1629_measure_lead_wire_resistance. 

NOTE 

This  functionality  was  added  to  the  EX1629  after  September  2006  in  firmware  version  1.0.  To 
ensure  compatibity,  use  the  instrument’s  embedded  web  page  interface  or  use  the  EX1629’s 

vtex1629_revision_query

 function. 

Shunt Calibration 

Shunt calibration can be performed  with either the internal 55 kΩ resistor or an external resistor 
inserted  into  the  front  panel  shunt  connector.  For  highest  accuracy,  the  value  of  this  external 
resistor  should  be  precisely  known.  The 

connection  resistance

  characteristic  refers  to  the  series 

resistance  of  the  switch  mechanisms  used  to  route  the  external  resistor  into  the  requested  bridge 
circuit.  This  resistance  must  be  considered  in  conjunction  with  the  raw  resistor  value  when 
determining  the  theoretical  simulated  strain  of  the  shunt  calibration  process.  The  connection 
resistance is the same for local or remote connection. 

Quarter-Bridge Strain Measurement 

The  strain  dynamic  range  is  slightly  different  for  tension  vs.  compression.  While  the  dynamic 
range of the voltage measurement circuitry is a balanced ±160 mV, the transfer function of strain-
to-voltage is nonlinear for quarter-bridge configuration, and that results in the small disparity. 

Quarter-bridge  measurement  accuracy  is  noted  as  being  exclusive  of  lead  wire  desensitization 
errors.  This  refers  to  the  gain  error  that  is  generated  by  lead  wire  resistance  in  series  with  the 
actual  strain  gage.  Depending  on  the  length  and  gauge  of  the  wire  employed,  the  resultant 
resistance can cause errors that are much larger than the underlying instrument accuracy. Precision 
measurements  consequently  demand  that  lead  wire  compensation  is  conducted  to  eliminate  this 
error. This compensation can be calculated theoretically if the resistance of the connection wire is 
characterized  or  can  be  inferred  through  the  shunt  calibration  process.  Reference  the 

Bridge 

Completion

  paragraph  above  for  information  on  how  to  compensate  for  the  lead  wire  resistance 

that is internal to the EX1629. 

Quarter-Bridge Strain Measurement/Full-Bridge Strain Measurement 

The key concepts regarding the conditions on the strain measurement accuracy tables are: 

 

The stability effects of the excitation source are already captured in the listed accuracies. It is 
thus  not  necessary  to  combine  the  two  to  create  a  total  system  accuracy.  The  listed  strain 
accuracies are already for the entire EX1629 measurement system. 

 

The  accuracies  do  assume  that  the  excitation  voltage  is  measured  and  used  in  the  EU 
conversion before the initiation of strain measurements. This eliminates its set point accuracy 
from being an error source. 

 

The restriction of 30 days, ±5 °C is used throughout the conditions. Essentially the intention is 
to  describe  a  strain  test  setup  that  is  initiated  with  a  self-calibration,  excitation  voltage 
measurement,  and  unstrained  voltage  measurement.  From  that  point,  continuous  strain 
measurements are considered to be taken over ambient conditions of 30 days, ±5 ºC. 

Содержание EX1629

Страница 1: ...EX1629 48 CHANNEL STRAIN GAGE INSTRUMENT USER S MANUAL P N 82 0109 000 Released February 17th 2012 VTI Instruments Corp 2031 Main Street Irvine CA 92614 6509 949 955 1894...

Страница 2: ...and Output 16 Multiple Gain Ranges 16 Sampling Rate 17 Digital Filtering 17 Triggering 17 Input Connector 17 TEDS Transducer Support 17 LXI Trigger Bus 17 LXI Limit Events 17 EX1629 Specifications 18...

Страница 3: ...39 Using Multiple Network Cards 39 Preventive Maintenance 41 SECTION 3 43 BASIC OPERATION 43 Introduction 43 Engineering Unit EU Conversion 43 Quarter Bridge 350 Quarter Bridge 120 Quarter Bridge User...

Страница 4: ...easurement Unit 69 Reset 69 Reboot 69 Network Configuration 69 Time Configuration 71 Upgrade 72 SECTION 6 73 PROGRAMMING 73 Introduction 73 Default Settings 73 Opening an Instrument Session 75 Closing...

Страница 5: ...unction Definition 104 EX1629 Function Set 105 vtex1629_abort 105 vtex1629_allow_all_channels 106 vtex1629_break_lock 107 vtex1629_check_lock 108 vtex1629_clear_stored_config 109 vtex1629_close 110 vt...

Страница 6: ...ber 164 vtex1629_get_lead_wire_resistance 165 vtex1629_get_linearscaling_configuration 166 vtex1629_get_lxi_limit_event_enabled 167 vtex1629_get_lxi_limit_event_latch 168 vtex1629_get_lxibus_configura...

Страница 7: ..._set_arm_delay 234 vtex1629_set_arm_source 235 vtex1629_set_bridge_limit 236 vtex1629_set_bridge_limit_enabled 238 vtex1629_set_cal_out 239 vtex1629_set_cal_source 240 vtex1629_set_completion_resistor...

Страница 8: ...trigger_count 289 vtex1629_set_trigger_delay 290 vtex1629_set_trigger_source 291 vtex1629_set_trigger_source_timer 292 vtex1629_set_trigger_timer 293 vtex1629_set_unstrained_voltage 294 vtex1629_soft_...

Страница 9: ...READ_MEMORY_2430 329 WRITE_AND_COPY_SCRATCHPAD_2430 330 DS2431 Commands 331 WRITE_SCRATCHPAD_2431 331 READ_SCRATCHPAD_2431 333 COPY_SCRATCHPAD_2431 334 READ_MEMORY_2431 335 WRITE_AND_COPY_SCRATCHPAD_...

Страница 10: ...duties and taxes for products returned to VTI from another country VTI warrants that its software and firmware designated by VTI for use with a product will execute its programming when properly inst...

Страница 11: ...ct has been designed and manufactured according to the following specifications SAFETY IEC 61010 1 2001 2nd Ed EN 61010 1 2001 2nd Ed EMC IEC 61326 1 2005 CISPR 11 1990 IEC 61326 1 2005 IEC 61000 4 2...

Страница 12: ...symbols may appear on the product or in the manual ATTENTION Important safety instructions Indicates hazardous voltage Frame or chassis ground Indicates that the product was manufactured after August...

Страница 13: ...electric shock the grounding conductor must be connected to earth ground Operating Conditions To avoid injury electric shock or fire hazard Do not operate in wet or damp conditions Do not operate in...

Страница 14: ...r Road Suite 13 Valley View OH 44125 Phone 216 447 8950 Fax 216 447 8951 VTI Instruments Lake Stevens Instrument Division 3216 Wetmore Avenue Suite 1 Everett WA 98201 Phone 949 955 1894 Fax 949 955 30...

Страница 15: ...her equipment to be connected or cabled together The design of the EX1629 provides full configuration flexibility with all bridge completion and excitation source configurations set programmatically T...

Страница 16: ...self calibration process completes quickly and does not require removal of the actual input connections making it convenient to run often Confidence Measurement System In addition to the main bridge m...

Страница 17: ...direct input of bridge configuration parameters and input configuration management LXI Trigger Bus The EX1629 features an LXI LAN eXtensions for Instrumentation compatible 8 channel trigger bus on th...

Страница 18: ...Base T Ethernet INPUT CONNECTOR RJ 45 BRIDGE EXCITATION REGULATION Independent high side and low side control on a per channel basis HIGH SIDE RANGE 0 to 8 V LOW SIDE RANGE 0 to 8 V RESOLUTION 14 bit...

Страница 19: ...sive of lead wire desensitization errors Exclusive of gage errors Exclusive of noise Note 3 30 days 5 C from unstrained voltage measurement Note 4 Only applies outside of self calibration window FULL...

Страница 20: ...25 V COMMON MODE INPUT RANGE 15 V CMRR dc TO 60 Hz 120 dB typical 110 dB minimum Gain 100 FILTERING ANALOG ANTI ALIAS LPF 60 kHz 1 pole per channel DIGITAL FIR FILTERING Passband ripple fs 3125 Hz fs...

Страница 21: ...GER BUS CHANNELS 8 CONNECTORS 2 Micro DB 25 ELECTRICAL Logic type M LVDS Type 1 VIT 50 mV maximum VIT 50 mV minimum VOS 1 V typical POWER REQUIREMENTS LINE VOLTAGE 90 250 V ac 50 60 Hz INPUT POWER 200...

Страница 22: ...is required in order to calculate the total system uncertainty For this analysis it must be noted that the listed characteristics are for each source independently Bridge Completion The characteristic...

Страница 23: ...e measurement circuitry is a balanced 160 mV the transfer function of strain to voltage is nonlinear for quarter bridge configuration and that results in the small disparity Quarter bridge measurement...

Страница 24: ...tation voltage This quantity has a lower uncertainty because as a difference measurement it is subject to fewer error sources While these performance characteristics are provided they should not be ad...

Страница 25: ...nsates for the lead wire resistance and delivers the correct excitation value For quarter bridge configurations it is highly recommended that the full 3 wire connection be used as shown in Figure 2 3...

Страница 26: ...inferred through the shunt calibration process or by calling the vtex1629_set_lead_wire_resistance and vtex1629_set_half_bridge_lead_wire_desensitization functions Please reference the Bridge Completi...

Страница 27: ...to external electrical magnetic and thermal disturbances However as with all precision instrumentation certain precautions if taken into consideration can help achieve maximum performance 1 The unit...

Страница 28: ...This utility uses the VXI 11 discovery protocol to discover the EX1629 This utility can also be used to upgrade the EX1629 s driver and firmware For more information on using the LInC U utility pleas...

Страница 29: ...e For example in a full bridge configuration using excitation remote sense the measurements are insensitive to the resistance of all connections However in a quarter bridge configuration the resistanc...

Страница 30: ...Bridge 1 of 48 channels Excitation Sense Sense Excitation Sense Excitation Sense Excitation Excitation Sense Excitation Sense RJ 45 Pin 12345678 Pin 2 Pin 7 Pin 6 Pin 3 Pin 8 Pin 1 10K 10K Instrumenta...

Страница 31: ...0 not 2000 Strain Bridge 8 pin telcom connector RJ 45 350 120 User 10K 10K Excitation Sense TEDS COMM External customer shunt cal resistor terminals Internal Rcal 55K Excitation Excitation Half Bridge...

Страница 32: ...s present in each gage not the total of the four gages For example if the positive gages are subjected to tensile strain of 1000 and the negative gages are subjected to compressive strain of 1000 the...

Страница 33: ...tation Excitation Excitation Sense Sense Excitation Sense Excitation Sense 0 V Excitation Excitation Sense 10K 10K Instrumentation Amplifier x1 x10 x100 Hi Lo Shield 150 150 Sense Cal AGND Sense Wagne...

Страница 34: ...GURATION The wideband output connector defined in Table 3 5 is a high performance analog wideband buffered output that can be connected to a high speed digitizer for measuring structural vibration lev...

Страница 35: ...OUTPUT DIAGRAM DRIVER INSTALLATION The EX1629 is shipped with a VTI Instruments Corp Drivers and Product Manuals CD which includes software drivers user s manuals the VTI Instruments Product Catalog...

Страница 36: ...Figure 5 3 For more information see Network Configuration in Section 5 NETWORK TROUBLESHOOTING If an error occurs when trying to discover the EX1629 see Web Page Operation in Section 5 for more infor...

Страница 37: ...PERTIES 4 Select Internet Protocol TCP IP then click the Properties button as shown in Figure 2 10 FIGURE 2 10 LOCAL AREA CONNECTION PROPERTIES DIALOG BOX 5 Determine if the PC is set to use auto or s...

Страница 38: ...to IP 1 Remove all network connections from the PC except for the connection to the EX1629 Wireless adapters should be disabled as well 2 Apply power to the EX1629 and wait for the LAN LED to turn gre...

Страница 39: ...ique IP address is assigned to the EX1629 by consulting a network administrator 7 In the Subnet Mask field enter the subnet mask in the Determine PCs Network Settings step 8 In the Gateway Address fie...

Страница 40: ...P Address field Although any valid network IP address can be used 192 168 1 2 is used in this example For more information on valid IP addresses please consult with an IT administrator 7 Set the Subne...

Страница 41: ...sed f If not automatically completed after the IP address is entered set the Subnet mask field to 255 255 255 0 FIGURE 2 16 COMPLETED NIC STATIC IP CONFIGURATION g Click OK to exit the network configu...

Страница 42: ...pable of using the optional calibration kit Self calibration is recommended on a monthly basis and should only be performed by qualified technicians operators see Self Calibration for more information...

Страница 43: ...nects the back half resistors to the Sense measurement line as illustrated in Figure 2 3 The automatic configuration however can be overridden as these elements can be configured independently Common...

Страница 44: ...ge configuration where the completion resistor is external to the instrument since only one leg of the bridge is active it is a quarter bridge not a half bridge which would contain two strain gage res...

Страница 45: ...conversion applies to the following bridge configuration R g R g VOUT VEXC R R FIGURE 3 4 HALF BRIDGE POISSON CONFIGURATION The half bridge strain conversion is calculated according to sense backhalf...

Страница 46: ...nversion applies to the following bridge configuration VOUT VEXC FIGURE 3 6 FULL BRIDGE POISSON CONFIGURATION The full bridge strain conversion is calculated according to sense sense diff V V V excita...

Страница 47: ...ally configures the input path for full bridge mode in which the completion resistor is shorted and the back half resistors are disconnected Linear This performs a scaling of the differential voltage...

Страница 48: ...ed as a factory option Off refers to the disabling of all of the resistor paths The default value of the completion resistor is full INPUT MULTIPLEXER The connection of the EX1629 s signal conditionin...

Страница 49: ...train conversions gage factor and Poisson ratio The gage factor GF a measure of strain gage sensitivity is a dimensionless quantity defined as the ratio of the fractional change in resistance to the f...

Страница 50: ...th respect to the positive and negative supplies that compose the total excitation voltage This programming independence provides the flexibility of balanced or unbalanced excitation Specifically the...

Страница 51: ...over whether the local sense or remote sense lines of the excitation source are measured If the remote sense lines are not connected to the external strain bridge such as in quarter bridge configurati...

Страница 52: ...ventional method of providing a value to the EU conversion it is also possible to manually enter a value This would normally only be done for system diagnostic purposes SCAN LIST CONFIGURATION The EX1...

Страница 53: ...f the instrument For example if a tare value of 100 is entered when the units are microstrain it will be considered as 100 However if the units setting is then changed to strain this tare value will b...

Страница 54: ...e absolute time of scan initiation If enabled the EX1629 can also return data from its confidence measurement system such as the excitation source voltages and excitation source currents SHUNT CALIBRA...

Страница 55: ...16 channels D F internal_remote every channel B internal_local every channel C teds_remote 1 per 16 channels A E TABLE 3 4 SHUNT CALIBRATION SETTINGS Shunt calibration configuration involves two discr...

Страница 56: ...to mitigate the effects of time and temperature on the signal conditioning circuitry of the EX1629 resulting in significant performance improvement However it cannot compensate or correct for potenti...

Страница 57: ...t the ability to save user configurations to non volatile storage however This option saves all configuration variables and automatically restores them at power on or reset instead of using the factor...

Страница 58: ...4 LO 25 CH 30 LO 25 CH 46 LO 26 CH 13 LO 26 CH 29 LO 26 CH 45 LO 27 CH 12 LO 27 CH 28 LO 27 CH 44 LO 28 CH 11 LO 28 CH 27 LO 28 CH 43 LO 29 CH 10 LO 29 CH 26 LO 29 CH 42 LO 30 CH 9 LO 30 CH 25 LO 30 C...

Страница 59: ...pull up When configured as inputs the DIO signals 0 through 15 may be used as trigger and or arm sources Several vendors provide appropriate mating connectors AMP part number 216166 1 44 pin housing i...

Страница 60: ...RIG_N7 TABLE 3 7 LXI TRIGGER BUS CONNECTOR PIN ASSIGNMENTS TEDS TRANSDUCER SUPPORT The EX1629 supports reading and writing to Transducer Electronic Data Sheets TEDS devices that implement the IEEE 145...

Страница 61: ...in 8 Pin 1 IO GND 10K 10K Instrumentation Amplifier x1 x10 x100 Hi Lo Shield 150 150 Sense Cal AGND Sense Wagner Cal AGND 430 kHz LOW PASS FILTER 60 3 kHz LOW PASS FILTER ADC TRIFILAR FILTER FIGURE 3...

Страница 62: ...wn network configuration To perform a network reset 1 Power off the EX1629 2 Press and hold the reset button 3 Power on the EX1629 4 Continue to hold the reset button for at least 30 seconds 5 Release...

Страница 63: ...tem and is diagramed in Figure 4 1 IDLE IDLE LAYER ARM LAYER TRIG LAYER INIT LAYER DEVICE LAYER Init Wait for ARM Event ARM Delay ARM Event ARM Count 0 or ARM Count Inf No Yes Software Arm ARM COUNT I...

Страница 64: ...ent transitions back into the INIT layer If Init Continuous mode is enabled the ARM layer is automatically reentered without the issuance of a trigger initialize command However unlike with a trigger...

Страница 65: ...returned will be 8 To be clear there is a single FIFO in the EX1629 that holds both main input channel data as well as confidence measurement system data ADC CLOCK AND SYNCHRONIZATION As was previous...

Страница 66: ...acquire data that is synchronized across all acquisition channels This requires configuring one of the devices as a master and the remaining devices as slaves The devices must be connected together u...

Страница 67: ...and show the instruments that were discovered as shown in Figure 5 1 To open the web page click on the hostname hyperlink in the Discover Devices tab The IP address of the EX1629 can also be viewed fr...

Страница 68: ...onal status and information only The Index page is an example of a status page Action This type of page initiates a command on the instrument but does not involve parameter entry The Reboot page is an...

Страница 69: ...rument reset clears the FIFO reading memory All desired acquisition data must be retrieved from the FIFO prior to the issuance of this command REBOOT This action page is used to perform a complete ins...

Страница 70: ...P and AutoIP enabling Static and then assigning a static IP address subnet mask and gateway address and optionally up to three DNS servers see Figure 5 3 NOTE The 169 254 16 subnet is reserved by the...

Страница 71: ...ary 1 1970 the beginning of the epoch The time and date can be manually specified on the Time Configuration page Figure 5 4 Manual configuration will be necessary if the network environment is such th...

Страница 72: ...ble state requiring return to the factory An uninterruptible power supply may be used to avoid this risk Perform the following steps to conduct a firmware upgrade 1 Perform a Reboot or a power cycle 2...

Страница 73: ...atile storage If there is a user defined configuration stored in non volatile storage that configuration is applied after a reset power cycle or use of the vtex1629_reset function The vtex1629_clear_s...

Страница 74: ...Specified Order 0 Auto Calculated Order 6 DIGITAL I O CONFIGURATION RESET VALUES CONFIGURATION PARAMETER RESET VALUE Bank 0 Direction 0 Input Bank 0 Pull up 0 Passive Bank 1 Direction 0 Input Bank 1 P...

Страница 75: ...instrrev Note that in the sample code above error code checking and handling is included The structure used above can be used as a template for all functions In the examples that follow error code ch...

Страница 76: ...s set the EU conversion for all channels result vtex1629_set_EU_conversion vi channels numberOfChannels VTEX1629_EUCONV_QTR_BRIDGE_120 set the gain result vtex1629_set_gain vi channels numberOfChannel...

Страница 77: ...numChannels MAX_NUMBER_OF_CHANNELS ViReal64 minArr MAX_NUMBER_OF_CHANNELS ViReal64 maxArr MAX_NUMBER_OF_CHANNELS int i 0 for i 0 i MAX_CHANNELS i channels i i for i 0 i MAX_NUMBER_OF_CHANNELS i minAr...

Страница 78: ...TRIGGER AND ADC CLOCK The EX1629 supports two general use cases standalone one or more instruments that sample independently and asynchronously and master slave one master instrument and one or more s...

Страница 79: ...thin the device the transmission scope for the line should be set to internal transmission only If the sample clock output is intended to be driven out on the external trigger bus the transmission sco...

Страница 80: ...can be output to other devices using the external trigger bus As with the sample clock and synchronization signal configurations the same LXI Trigger Bus line can be used by the device for its trigge...

Страница 81: ...Multiple Instruments Master Slave Example Configuration The Master Slave configuration is suitable for larger acquisition systems up to several thousand channels hundreds of instruments By sharing a s...

Страница 82: ...1629_reset_trigger_arm slave_vi Reset the trigger system on the master device result vtex1629_reset_trigger_arm master_vi Configure the LXI trigger bus lines on the master device Lines 0 3 are externa...

Страница 83: ...imer master_vi 5 Configure the trigger pattern to generate an event based on the timer result vtex1629_set_pattern_trig_configuration master_vi trigLxiLines trigDioLines VI_TRUE VTEX1629_LXI_LINE_TWO...

Страница 84: ..._OUTPUT VTEX1629_LXI_INTERNAL result vtex1629_set_lxibus_configuration slave_vi VTEX1629_LXI_LINE_SEVEN VTEX1629_LXI_OUTPUT VTEX1629_LXI_INTERNAL Configure the sample clock on the slave as an input fr...

Страница 85: ...om the instrument returning to the user application when either the request has been fulfilled or the timeout elapses To fulfill the request the instrument driver may need to make many repeated querie...

Страница 86: ...is specified as is the maximum number of data elements to be returned The acquisition data along with the timestamp for each scan is returned in three arrays of ViReal64 elements two for the timestamp...

Страница 87: ...is important that the streaming data interface be enabled prior to initiating acquisition as the EX1629 prevents streaming data from being enabled after initiating acquisition As Figure 6 2 shows the...

Страница 88: ...provides a callback function Internally the instrument driver creates a thread and then opens a socket for streaming data between the host computer and the instrument The newly constructed thread does...

Страница 89: ...handle The FILE handle as well as a sample count total variable are stored in a user defined data structure A pointer to this structure is passed to the vtex1629_enable_streaming_data function along...

Страница 90: ...third contains data for channels 32 through 47 Only data for channels enabled in the scanlist are included That is if the main input scanlist contains channels 0 through 15 and 16 the first data set t...

Страница 91: ...nt overwriting any data that may already exist in the external memory location to which the calibration file will be written In this example the self calibration and full calibration files are output...

Страница 92: ...X1629_TRIG_SRC_IMMEDIATE or at some point in the future when the instrument receives the required signals e g a raising edge on LXI 0 In general after acquisition is initiated by the vtex1629_trig_ini...

Страница 93: ...to function and is presented below Initialize Initialize vtex1629_init Limit Checking Set Bridge Limit Enabled vtex1629_set_bridge_limit_enabled Get Bridge Limit Enabled vtex1629_get_bridge_limit_enab...

Страница 94: ...vtex1629_dio_clear_events_all LXI Trigger Bus Calls Send LXI Bus Pulse vtex1629_send_lxibus_pulse Get LXI Bus Configuration vtex1629_get_lxibus_configuration Get LXI Bus Output vtex1629_get_lxibus_out...

Страница 95: ...ter_configuration Get Settling Time vtex1629_get_settling_time Excitation Voltage Calls Get Programmed Excitation Voltage vtex1629_get_excitation Get Excitation Voltage Enabled vtex1629_get_excitation...

Страница 96: ...ation vtex1629_self_cal_init Initialize Zero Calibration vtex1629_zero_cal Query Self Calibration File in Non vol Memory vtex1629_self_cal_is_stored Load Self Calibration File from Non vol Memory vtex...

Страница 97: ..._wire_resistance Get Lead Wire Resistance vtex1629_get_lead_wire_resistance Set Half Bridge Lead Wire Desensitization vtex1629_set_half_bridge_lead_wire_desensitization Get Half Bridge Lead Wire Desen...

Страница 98: ...a Starts data streaming from instrument vtex1629_enable_streaming_dataEx Start data streaming from instrument expert mode vtex1629_erase_teds_data Erases the data on a TEDS device for one particular c...

Страница 99: ..._get_excitation Queries and returns the programmed excitation voltage for a given channel vtex1629_get_excitation_enabled Queries and returns the enabled status of the excitation voltage for a specifi...

Страница 100: ...nt_source Queries and returns the shunt source for a particular channel vtex1629_get_shunt_value Queries and returns a shunt resistor value based on a given channel and shunt source vtex1629_get_store...

Страница 101: ...g This functions queries the existence of a previously saved self calibration file within non volatile memory vtex1629_self_cal_is_stored This functions queries the existence of a previously saved sel...

Страница 102: ...given list of channels vtex1629_set_gauge_factor Sets the gage factor for a list of channels vtex1629_set_half_bridge_lead_wire_desensitization Sets the lead wire desensitization factor a given list o...

Страница 103: ...9_set_trigger_delay Sets the trigger delay for the EX1629 vtex1629_set_trigger_source Sets the trigger source on the EX1629 vtex1629_set_trigger_source_timer A convenience functions that makes calls t...

Страница 104: ...will be provided and when appropriate the range of values that the parameter will accept without creating an error Ranges are assumed to be inclusive unless otherwise specified DATA ITEM RESET VALUE T...

Страница 105: ...instrument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function aborts data acquisition...

Страница 106: ...handle to the instrument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function allows t...

Страница 107: ...ot applicable to this function DESCRIPTION This function releases a lock on the instrument regardless of its owner This allows for instrument recovery if the locking client application or computer bec...

Страница 108: ...function owns the lock A value of 1 returned indicates that the EX1629 is locked and that the current session owns that lock DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This func...

Страница 109: ...rument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function erases the stored configura...

Страница 110: ...the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function closes the current instrument programming session This command should be performed at the conclus...

Страница 111: ...unction compares the two provided digests byte by byte If VI_TRUE is returned in equal all bytes in digestA and digestB are equal A digest is a digital signature or a fingerprint representing the actu...

Страница 112: ...dle is obtained by the function and remains valid until the session is closed inputLine the DIO Input Line whose event action entries are being cleared DATA ITEM RESET VALUE Not applicable to this fun...

Страница 113: ...vi contains a session handle to the instrument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION T...

Страница 114: ...able_logging void FUNCTION PARAMETERS No parameters are defined for this function DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function stops the logging of driver calls EXAM...

Страница 115: ...e function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function causes streaming data from the EX1629 to cease In order to use...

Страница 116: ...e name relative path is provided the file will be created in the current working directory of the application append a Boolean input value that specifies if log results will be appended to an existing...

Страница 117: ...longer synchronized with the LXI clock and it is now utilizing the EX1629 s internal oscillator as its clock source Possible causes of this error include the accidental removal of the LXI cable or a m...

Страница 118: ...mestamp_nsec print the data for smp_idx 0 smp_idx data dataset dataset_val ds_idx data data_len smp_idx fprintf priv_struct fout t i f n data dataset dataset_val ds_idx data data_val smp_idx if data d...

Страница 119: ...to implement this function the macro INSTR_LANGUAGE_SPECIFIC must be defined It should be noted that the data page created by this function contains an error code field which should equal zero In the...

Страница 120: ...el an integer input value indicating the channel for which the completion resistor is desired Valid input values 0 to 47 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function...

Страница 121: ...ion is closed statusCode an input status code corresponding to the error for which the error message is desired errMessage a return string that contains the error message This string should be at leas...

Страница 122: ...ndle is obtained by the function and remains valid until the session is closed error_code Instrument Error Code error_message Error Message DATA ITEM RESET VALUE Not applicable to this function DESCRI...

Страница 123: ...dicating the number of instruments found timeout_secs an integer input value in seconds indicating the amount of time to search before timing out DATA ITEM RESET VALUE Not applicable to this function...

Страница 124: ...to this function DESCRIPTION This function queries and returns the arm count for the EX1629 This count represents the number of times the EX1629 will wait for ARM events to occur after the trigger sta...

Страница 125: ...to this function DESCRIPTION This function queries and returns the arm delay for the EX1629 This indicates the amount of time in seconds that the EX1629 will wait after receiving an ARM event before...

Страница 126: ...ative Edge 11 0x0B VTEX1629_TRIG_SRC_LXI1_NEG LXI 1 Negative Edge 12 0x0C VTEX1629_TRIG_SRC_LXI2_NEG LXI 2 Negative Edge 13 0x0D VTEX1629_TRIG_SRC_LXI3_NEG LXI 3 Negative Edge 14 0x0E VTEX1629_TRIG_SR...

Страница 127: ...www vtiinstruments com EX1629 Command Set 127 EXAMPLE ViSession instrumentHandle ViStatus status ViInt32 armsource status vtex1629_get_arm_source instrumentHandle armsource...

Страница 128: ...eded status LSW MIN Limit exceeded status The limits field is a bit field This UINT32 has two bits per channel 16 channels per analog board one to represent MAX limit exceeded and one to represent MIN...

Страница 129: ...tiinstruments com EX1629 Command Set 129 EXAMPLE ViSession instrumentHandle ViStatus status ViInt32 channel 5 ViReal64 min 0 ViReal64 max 0 status vtex1629_get_bridge_limit instrumentHandle channel mi...

Страница 130: ...remains valid until the session is closed enabled a Boolean return value indicating the enabled status of the excitation source A returned value of 1 indicates that the excitation source is enabled DA...

Страница 131: ...channels listed in this channelList array numberOfChannels a return integer value indicating the number of channels currently included in the scan list Valid return values 1 to 48 coefficientOutputAr...

Страница 132: ...TE_OUT_CURR_NEG_OFFSET 57 0x39 VTEX1629_CONF_EXCITE_OUT_CURR_NEG_COMMON_MODE_RESISTANCE 58 0x3A VTEX1629_SENSE_RESISTOR_NEG 59 0x3B VTEX1629_SENSE_RESISTOR_POS 60 0x3C VTEX1629_SUPPLY_EXCITE_OUT_NEG_G...

Страница 133: ...OutputArray MAX_CHANNELS int i 0 memset channelList 0x00 sizeof channelList memset coefficientOutputArray 0x00 sizeof coefficientOutputArray CalType VTEX1629_CAL_DATA_SELF coefficientSelector VTEX1629...

Страница 134: ...rameter has the following valid input values Decimal Value Hex Value define Symbol Description 0 0x00 VTEX1629_CAL_DATA_COMBINED Both self and factory calibration data 1 0x01 VTEX1629_CAL_DATA_SELF Se...

Страница 135: ...www vtiinstruments com EX1629 Command Set 135 fileType bufferSize buffer actualSize if status VI_SUCCESS inform the user the API call failed...

Страница 136: ...ction DESCRIPTION This function returns the total buffer size required to read the cal data including terminating nulls etc The client application should use this size to allocate a sufficiently large...

Страница 137: ...the calibration source Valid return values are Decimal Value Hex Value define Symbol Nominal Voltage V 0 0x00 VTEX1629_CALSRC_0 0 1 0x01 VTEX1629_CALSRC_P_0_07 0 07 2 0x02 VTEX1629_CALSRC_N_0_07 0 07...

Страница 138: ...he non volatile factory calibration file that is stored within the device DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the mode and value of the...

Страница 139: ...mon mode 2 0x02 VTEX1629_CONFSRC_BRIDGE_NEG Bridge 3 0x03 VTEX1629_CONFSRC_EXCITE_POS Excite 4 0x04 VTEX1629_CONFSRC_EXCITE_NEG Excite 5 0x05 VTEX1629_CONFSRC_EXCITE_NEG_SENSE Excite Sense 6 0x06 VTEX...

Страница 140: ...ed or not This is a 16 bit field stored in the least significant 16 bits of a UINT32 variable 0 Confidence Data within Limits 1 Confidence Data Limit exceeded for CH 15 0 Confidence Data within Limits...

Страница 141: ...e mapping follows the same ordering as the source define in vtex1629 h i e if sources 3 8 and 10 are selected then they are reported in that order Confidence sources that are not part of the confidenc...

Страница 142: ...Decimal Value Hex Value define Symbol mode Description 0 0x00 VTEX1629_CONF_LIMIT_DISABLE_REPORT Reporting disabled 1 0x01 VTEX1629_CONF_LIMIT_SUMMARY_REPORT_ONLY Summary report mode selected 2 0x02 V...

Страница 143: ...d digest array For consistency the client application should allocate VTEX1629_MAX_DIGEST_LENGTH bytes digest the current configuration s digest digestActualSize the actual configuration digest size D...

Страница 144: ...il the session is closed direction an integer return value indicating the direction of bank zero of the digital I O Valid return values 0 or 1 DATA ITEM RESET VALUE Not applicable to this function DES...

Страница 145: ...n is closed pullup an integer return value indicating the pull up mode for bank zero of the digital I O Valid return values 0 or 1 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION Thi...

Страница 146: ...til the session is closed direction an integer return value indicating the direction of bank one of the digital I O Valid return values 0 or 1 DATA ITEM RESET VALUE Not applicable to this function DES...

Страница 147: ...on is closed pullup an integer return value indicating the pull up mode for bank one of the digital I O Valid return values 0 or 1 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION Thi...

Страница 148: ...al the actual number of actions available Valid return values 1 through 8 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the current setting for DI...

Страница 149: ...The dioIn parameter is a decimal value that must be converted to a 16 bit binary value Once done the eight most significant bits correspond to the eight channels of bank one channels 8 15 The eight le...

Страница 150: ...he dioOut parameter is a decimal value that must be converted to a 16 bit binary value Once done the eight most significant bits correspond to the eight channels of bank one channels 8 15 The eight le...

Страница 151: ...s are 0 1 or 2 dspMajor indicates the minor dsp version dspMinor indicates the minor DSP version dspBuild indicates the DSP build date indicates the date of the DSP build The client should allocate an...

Страница 152: ...ic channel Valid return values for the EUConversionType parameter are Decimal Value Hex Value define Symbol EUConversionType Description 0 0x00 VTEX1629_EUCONV_VOLT_OUTPUT Voltage 1 0x01 VTEX1629_EUCO...

Страница 153: ...it is advised to give the confidence filters at least 1 5 s to settle from the time the confidence source for excitation voltage is enabled or the excitation value is changed The vtex1629_measure_exc...

Страница 154: ...given channel Valid return values 0 00000 to 16 00000 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the current value used in EU conversions for t...

Страница 155: ...values 8 000000 through 0 000000 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the actual excitation voltages for a given channel The excitation...

Страница 156: ...citation source will be returned Valid input values 0 to 47 enabled a Boolean return value indicating the enabled status of the excitation source A returned value of 1 indicates that the excitation so...

Страница 157: ...ot applicable to this function DESCRIPTION This function queries the EX1629 for the current FIFO memory page count One page of data in the FIFO corresponds to one scan or sample of all enabled channel...

Страница 158: ...an integer input value that specifies the channel for which the gain will be returned Valid input values 0 to 47 gain a real return value indicating the specified channel s currently configured gain...

Страница 159: ...n integer input value that specifies the channel for which the gage factor will be returned Valid input values 0 to 47 gageFactor a real return value indicating the given channel s currently entered g...

Страница 160: ...hannel for which the gage factor will be returned Valid input values 0 to 47 factor returned factor value for the specified channel DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION Th...

Страница 161: ...turn value indicating the group delay in number of samples of the currently configured filter for the given channel DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function quer...

Страница 162: ...s all frequencies NOTE When setting channel filters on the EX1629 it is highly recommended that the same filter setting be used for each group of sixteen channels 0 through 15 16 through 31 and 32 thr...

Страница 163: ...tly included in the scan list Valid return values 1 to 48 muxInValue indicates the input multiplexer source Valid return values 0 to 4 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION...

Страница 164: ...and remains valid until the session is closed serialNumber indicates the instruments serial number The client should allocate an array of 64 bytes for the serial number DATA ITEM RESET VALUE Not appl...

Страница 165: ...nnel an integer input value that specifies the channel for which the IIR filter configuration will be returned Valid input values 0 to 47 resistance returned resistance value for the specified channel...

Страница 166: ...actor m in the linear equation y mx b b a real return value indicating the offset factor b in the linear equation y mx b DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function...

Страница 167: ...led0 the limit mask for the channels 0 through 15 where the lower 16 bits are minimums for these channels while the upper 16 bits are maximums enabled1 the limit mask for the channels 16 through 31 wh...

Страница 168: ...andle is obtained by the function and remains valid until the session is closed latches an 8 bit mask that indicates which of the eight corresponding LXI Trigger Bus lines will be latched when an over...

Страница 169: ...define Symbol lxiLine Description 0 0x00 VTEX1629_LXI_LINE_ZERO LXI LINE 0 1 0x01 VTEX1629_LXI_LINE_ONE LXI LINE 1 2 0x02 VTEX1629_LXI_LINE_TWO LXI LINE 2 3 0x03 VTEX1629_LXI_LINE_THREE LXI LINE 3 4 0...

Страница 170: ...VTI Instruments Corp 170 EX1629 Command Set EXAMPLE ViSession instrumentHandle ViStatus status ViInt32 inout scope status vtex1629_get_lxibus_configuration instrumentHandle 0 inout scope...

Страница 171: ...function DESCRIPTION This function queries and returns the input state of each of the channels on the LXI Trigger Bus The input parameter is an 8 bit integer where the least significant bit of the in...

Страница 172: ...s and returns the output state of each of the channels on the LXI Trigger Bus The output parameter is an 8 bit integer where the least significant bit of the integer corresponds to LXI Trigger Bus cha...

Страница 173: ...d to explicitly enable the software arm source It is always available for use while in pattern arm mode All of the conditions specified must be met for an arm event to be generated If multiple conditi...

Страница 174: ...to communicate the arm event to the slave devices It is also necessary to configure this LXI Trigger Bus line to be used as an output see vtex1629_set_lxibus_configuration The lxiInput parameter speci...

Страница 175: ...to this function DESCRIPTION This queries and returns the EX1629 s current configuration for the pattern trigger mode of operation This mode allows the EX1629 to accept TRIG events from multiple sourc...

Страница 176: ...ce configuration If the EX1629 is a master driving trigger events to peripheral slaves the lxiOutput parameter specifies the LXI Trigger Bus line that will be used to communicate the trigger event to...

Страница 177: ...nput value that specifies the channel for which the Poisson ratio will be returned Valid input values 0 to 47 poissonRatio a real return value that indicates the Poisson ratio of the specified channel...

Страница 178: ...f and other devices or as a slave device that receives its sample clock from another device When operating in standalone mode sampleClockMode should be configured as a master The inLine parameter indi...

Страница 179: ...eCount an integer return value indicating the currently configured post trigger sample count Valid return values 0 to 400000000 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This f...

Страница 180: ...ATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the currently configured sample frequency in hertz Hz for all channels The EX1629 offers a discrete n...

Страница 181: ...he scan list Valid return values 0 to 47 numberOfChannels a return integer value indicating the number of channels currently included in the scan list Valid return values 1 to 48 DATA ITEM RESET VALUE...

Страница 182: ...failedChannelArrayActualSize the actual size of the returned array failedChannelArray parameter Valid return values 0 to 48 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This funct...

Страница 183: ...en by the EX1629 signal conditioning module to settle to the input vale 2 of the input value after a reset of the signal conditioning path The signal conditioning path is reset on a sync event The set...

Страница 184: ...abled a Boolean return value indicating whether or not the shunt resistor is enabled for the given channel A returned value of 1 indicates that the shunt is enabled for that channel DATA ITEM RESET VA...

Страница 185: ...SOURCE_IS_LOCAL Internal local 4 0x04 VTEX1629_SHUNT_SOURCE_TEDS TEDS remote Local and Remote refer to how the shunt resistor is connected to the bridge For Local the connection is made within the EX1...

Страница 186: ...remote 1 0x01 VTEX1629_FRONT_PANEL_LOCAL Front panel local 2 0x02 VTEX1629_INTERNAL_REMOTE Internal remote 3 0x03 VTEX1629_INTERNAL_REMOTE Internal local 4 0x04 VTEX1629_TEDS_REMOTE TEDS remote Local...

Страница 187: ...rray For consistency the client application should allocate VTEX1629_MAX_DIGEST_LENGTH bytes digest the current configuration s digest digestActualSize the actual configuration digest size DATA ITEM R...

Страница 188: ...rn strain measurements in units of strain or microstrain A value of 1 indicates that the EX1629 is configured to return microstrain units for the given channel whereas a value of 0 indicates the EX162...

Страница 189: ...ng in standalone mode synchMode should be configured as a master The inLine parameter indicates the LXI line that should be used as the synch input This value is applicable regardless of whether the d...

Страница 190: ...es the currently configured tare value for the given channel DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function reads the currently configured tare value for a specific ch...

Страница 191: ...device into tedsInfo In general this should be equal to VTEX1629_TEDS_DATASIZE 32 tedsInfo A return array that will contain the TEDS Info Each element of the array corresponds to a byte of data from...

Страница 192: ...es the currently configured trigger count for the EX1629 Valid return values 1 to 231 1 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns the currentl...

Страница 193: ...T VALUE Not applicable to this function DESCRIPTION This function queries and returns the trigger delay for the EX1629 Specifically this is the amount of time in seconds that the EX1629 will wait afte...

Страница 194: ..._NEG LXI 0 Negative Edge 11 0x0B VTEX1629_TRIG_SRC_LXI1_NEG LXI 1 Negative Edge 12 0x0C VTEX1629_TRIG_SRC_LXI2_NEG LXI 2 Negative Edge 13 0x0D VTEX1629_TRIG_SRC_LXI3_NEG LXI 3 Negative Edge 14 0x0E VT...

Страница 195: ...put value in seconds indicating the trigger system timer Valid return values 0 s to 4294 967295 s DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries and returns th...

Страница 196: ...rained voltage will be returned Valid input values 0 to 47 unstrainedVoltage a real return value that indicates the currently configured unstrained voltage for the given channel DATA ITEM RESET VALUE...

Страница 197: ...ed voltage for the given channel Valid input values VI_TRUE LED is on VI_FALSE LED is off DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION The function provides the user the ability t...

Страница 198: ...Not applicable to this function DESCRIPTION This function opens a session with the instrument and returns a session handle It can optionally perform an identification query and or reset the instrumen...

Страница 199: ...ent application should allocate VTEX1629_MAX_DIGEST_LENGTH bytes digest the stored configuration s digest digestActualSize the actual configuration digest size DATA ITEM RESET VALUE Not applicable to...

Страница 200: ...ck When no client has a lock calls are accepted from all clients A lock can only be acquired if the instrument is not already locked by another user By design the locking mechanism is able to be overr...

Страница 201: ...LUE Not applicable to this function DESCRIPTION This function measures the indicated bridge parameter to indicate measurement confidence The confValue parameter can assume the following values Decimal...

Страница 202: ...p 202 EX1629 Command Set memset returnedVals 0x00 sizeof returnedVals status vtex1629_measure_confidence instrumentHandle CONFIDENCE_EXCITATION_CURRENT numOfChannels channels sampleCount returnedVals...

Страница 203: ...ction DESCRIPTION This function measures the total excitation voltage positive excitation voltage negative excitation voltage for a list of channels Setting the euConversion parameter to VI_TRUE 1 ind...

Страница 204: ...on instrumentHandle ViInt32 channels 5 0 1 2 3 4 ViInt32 numberOfChannels 5 numValues 0 ViReal64 data 5 ViStatus status status vtex1629_measure_excitation_voltage instrumentHandle channels numberOfCha...

Страница 205: ...e gage and the Excitation front panel connection Moreover the EX1629 has the capability again through the confidence system to determine the current that is flowing through the lead wire resistance Ha...

Страница 206: ...I Instruments Corp 206 EX1629 Command Set memset resistance 0x00 sizeof resistance status vtex1629_measure_lead_wire_resistance instrumentHandle numberOfChannels channels resistance sampleCount VI_TRU...

Страница 207: ...value indicating whether the measured values will be used for future EU conversions DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function measures the unstrained voltage for...

Страница 208: ...9 before timing out and returning timeout If a zero is passed for this parameter the timeout period is infinite DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function retrieve...

Страница 209: ...S NUM_SCANS NUM_CHANNELS define TIMEOUT_SECS 5 ViSession instrumentHandle ViReal64 seconds NUM_SCANS ViReal64 fractseconds NUM_SCANS ViReal64 acqdata MAX_NUM_SAMPLES ViInt32 numdata numscans result vt...

Страница 210: ...ieving data from the EX1629 before timing out and returning If a zero is passed for this parameter the timeout period is infinite DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This...

Страница 211: ...d or the timeout to_secs expires whichever happens first There are other mechanisms for retrieving data from the EX1629 Please see Retrieving Data Read FIFO and Streaming Data for more information EXA...

Страница 212: ...ber of bytes actually written to the array holding the MLAN buffer data DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function reads the MicroLAN MLAN response buffer from a T...

Страница 213: ...RN Its size should be equal to VTEX1629_MAX_MLAN_URN_SIZE teds_urnActualSize Output integer indicating the number of bytes actually written to the array that holds the URN DATA ITEM RESET VALUE Not ap...

Страница 214: ...y the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function commands the instrument to assume the default settings as d...

Страница 215: ...ns a session handle to the instrument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This funct...

Страница 216: ...ntains a session handle to the instrument This handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This f...

Страница 217: ...lid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function resets all trigger system configuration settings Trigger and Arm to their reset values a...

Страница 218: ...ains valid until the session is closed driverRev a return string indicating the driver revision instrRev a return string indicating the firmware revision DATA ITEM RESET VALUE Not applicable to this f...

Страница 219: ...data but does not affect any self calibration data that is stored in nonvolatile memory After this function the effective calibration will be the full calibration factory calibration also known as the...

Страница 220: ...unction clears self calibration data from nonvolatile memory It does not however affect the current self calibration data regardless of whether it came from a recent self calibration or a loading from...

Страница 221: ...e last self calibration process that was run and completed Expected data return values 0 1 or 2 DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function returns the status of th...

Страница 222: ...ot In order to ensure that the override is intentional it is strongly recommended that user intervention be required in the software application to employ it The overRide parameter is used in the case...

Страница 223: ...UPTIME_FOR_CAL prompt user to verify that it is okay to override the uptime requirement if okay_to_override status vtex1629_self_cal_init instrumentHandle override rec_uptime act_uptime if status VI_S...

Страница 224: ...ing A return value of 1 indicates that self calibration is running whereas 0 indicates that it is not DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function queries the status...

Страница 225: ...le within nonvolatile memory A return value of VI_TRUE 1 indicates the existence of a file whereas VI_FALSE 0 indicates that no file exists DATA ITEM RESET VALUE Not applicable to this function DESCRI...

Страница 226: ...ession is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function takes a currently stored self calibration file from nonvolatile memory and loads it as the current self...

Страница 227: ...r cycle and reboot Any other previously stored self calibration data will be lost Since the existence of nonvolatile self calibration data represents a permanent although revocable change from the ful...

Страница 228: ...be able to store up to 256 characters The EX1629 self test consists of a set of operations that are identical to those performed during self calibration No calibration data is modified by this functi...

Страница 229: ...DESCRIPTION This function returns the status of the self test initiated via the vtex1629_self_test_init function It should not be used and is not necessary with the vtex1629_self_test function as tha...

Страница 230: ...ates a self test It returns immediately without waiting for the self test to complete The vtex1629_self_test_get_status is used to monitor the self test progress The vtex1629_self_test function initia...

Страница 231: ...els The upper 16 bits are ignored DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function sends a pulse out on the selected DIO channels bank one channel bank zero dioOut 15 0...

Страница 232: ...VALUE Not applicable to this function DESCRIPTION This function sends a pulse out on the desired LXI Trigger Bus channels The pulseLines parameter is an 8 bit integer where the least significant bit...

Страница 233: ...infinite DATA ITEM RESET VALUE armCount 1 DESCRIPTION This function sets the arm count for the EX1629 This count represents the number of times the EX1629 will wait for arm events to occur after the t...

Страница 234: ...it transitions the trigger state machine from the ARM layer into the TRIG layer The actual delay exhibited by the EX1629 is dependent on the sample frequency set by calling the vtex1629_set_sample_fr...

Страница 235: ...e Edge 12 0x0C VTEX1629_TRIG_SRC_LXI2_NEG LXI 2 Negative Edge 13 0x0D VTEX1629_TRIG_SRC_LXI3_NEG LXI 3 Negative Edge 14 0x0E VTEX1629_TRIG_SRC_LXI4_NEG LXI 4 Negative Edge 15 0x0F VTEX1629_TRIG_SRC_LX...

Страница 236: ...MAX for CH 0 0 Bridge data is greater than the MIN for CH 15 1 Bridge data is less than the MIN for CH 15 0 Bridge data is greater than the MIN for CH 0 1 Bridge data is less than the MIN for CH 0 31...

Страница 237: ...EU conversion is volts then the limit values are in volts EXAMPLE ViSession instrumentHandle ViStatus status VI_SUCCESS ViInt32 numChannels MAX_NUMBER_OF_CHANNELS ViInt32 channels MAX_NUMBER_OF_CHANNE...

Страница 238: ...remains valid until the session is closed enabled a Boolean input value setting the enabled status of the excitation source A value of VI_TRUE enables the excitation source A value of VI_FALSE disable...

Страница 239: ...the Description section below for more information DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function sets the calibration input source to a specified voltage Possible va...

Страница 240: ...a specified voltage Valid input values for the calSource parameter are Decimal Value Hex Value define Symbol Nominal Voltage V 0 0x00 VTEX1629_CALSRC_0 0 1 0x01 VTEX1629_CALSRC_P_0_07 0 07 2 0x02 VTEX...

Страница 241: ...120 or 350 DATA ITEM RESET VALUE completionResistorMode 0 Full DESCRIPTION This function sets the mode of the completion resistor for a list of channels The acceptable values for the completionResisto...

Страница 242: ...cite 5 0x05 VTEX1629_CONFSRC_EXCITE_NEG_SENSE Excite Sense 6 0x06 VTEX1629_CONFSRC_EXCITE_POS_SENSE Excite Sense 7 0x07 VTEX1629_CONFSRC_EXCITE_POS_CURR Excite Current 8 0x08 VTEX1629_CONFSRC_EXCITE_N...

Страница 243: ...f the limits on all active confidence sources for a particular channel were exceeded or not This is a 16 bit field stored in the least significant 16 bits of a UINT32 variable 0 Confidence Data within...

Страница 244: ...d then they are reported in that order Confidence sources that are not part of the confidence scanlist are not reported and will have their bit fields set to 0 Confidence values are reported at a maxi...

Страница 245: ...ws Decimal Value Hex Value define Symbol mode Description 0 0x00 VTEX1629_CONF_LIMIT_DISABLE_REPORT Reporting disabled 1 0x01 VTEX1629_CONF_LIMIT_SUMMARY_REPORT_ONLY Summary report mode selected 2 0x0...

Страница 246: ...losed direction an integer input value indicating the desired direction of bank zero of the digital I O Valid input values 0 or 1 DATA ITEM RESET VALUE direction 0 input DESCRIPTION This function sets...

Страница 247: ...d pull up mode for bank zero of the digital I O Valid input values 0 or 1 DATA ITEM RESET VALUE pullup 0 passive pull up mode DESCRIPTION This function sets the pull up mode for bank zero of the digit...

Страница 248: ...closed direction an integer input value indicating the desired direction of bank one of the digital I O Valid input values 0 or 1 DATA ITEM RESET VALUE direction 0 input DESCRIPTION This function sets...

Страница 249: ...ed pull up mode for bank one of the digital I O Valid input values 0 or 1 DATA ITEM RESET VALUE pullup 0 passive pull up mode DESCRIPTION This function sets the pull up mode for bank one of the digita...

Страница 250: ...lues 0 through 3 DATA ITEM RESET VALUE pullup 0 passive pull up mode DESCRIPTION This function sets the conditions under which DIO event transitions will occur The numActions parameter defines the siz...

Страница 251: ...utTrigType 0 ViInt32 numActions MAX_DIO_CHANNELS ViInt32 outputLineArr MAX_DIO_CHANNELS ViInt32 outputActionTypeArr MAX_DIO_CHANNELS ViInt32 i 0 for i 0 i MAX_DIO_CHANNELS i outputLineArr i i outputAc...

Страница 252: ...eight most significant bits to the eight channels of bank one channels 8 15 and the eight least significant bits to the eight channels of bank zero channels 0 7 This is illustrated below bank one cha...

Страница 253: ...lue Hex Value define Symbol EU ConversionType Description 0 0x00 VTEX1629_EUCONV_VOLT_OUTPUT Voltage 1 0x01 VTEX1629_EUCONV_QTR_BRIDGE_120 Quarter Bridge 120 2 0x02 VTEX1629_EUCONV_QTR_BRIDGE_350 Quar...

Страница 254: ...s fs less than or equal to 1 kHz While in this mode it is advised to give the confidence filters at least 1 5 s to settle from the time the confidence source for excitation voltage is enabled or the e...

Страница 255: ...oltage a real input value in volts that indicates the value that should be used in EU conversions for the excitation voltage Valid input values 0 00000 to 16 00000 DATA ITEM RESET VALUE euConversionVo...

Страница 256: ...tual value can be queried with the vtex1629_get_excitation function Additionally the accuracy specifications EX1629 Specifications for the instrument require that the excitation voltage be measured se...

Страница 257: ...to 48 enabled a Boolean input value which controls the enabling or disabling of the excitation voltage for a given list of channels Valid input values 0 or 1 DATA ITEM RESET VALUE enabled 0 DESCRIPTIO...

Страница 258: ...ain a real input value indicating the desired gain value for the given set of channels Valid input values 1 00 10 0 or 100 0 DATA ITEM RESET VALUE gain 1 0 DESCRIPTION This function sets the signal co...

Страница 259: ...ontaining a list of channel numbers for which the gage factor will be set Valid input values 0 to 47 numberOfChannels the size of the channels list Valid input values 1 to 48 gageFactor a real input v...

Страница 260: ...y of values which set the desensitization error for the channels indicated in the channels array Valid input values are number greater than 1 DATA ITEM RESET VALUE factor 1 DESCRIPTION This function s...

Страница 261: ...sform 0 bilinear filterOrder 6 DESCRIPTION This function configures the IIR filters for a given list of channels The filterType parameter has three allowed values Decimal Value Hex Value define Symbol...

Страница 262: ...ssion in Appendix B EXAMPLE ViSession instrumentHandle ViStatus status ViInt32 channels 0 ViInt32 numberOfChannels 1 configure IIR filtering on channel 0 with a 5th order Bessel filter with a cutoff f...

Страница 263: ...ource The muxInValue parameter can be set to the following values Decimal Value Hex Value define Symbol muxInValue Description 0 0x00 VTEX1629_INPUTMUX_BRIDGE_TYPE_FULL Full Bridge 1 0x01 VTEX1629_INP...

Страница 264: ...s the channels to which the factor parameter will apply Valid input values 0 to 47 resistance sets the lead wire resistance value Valid input values are numbers greater than 0 DATA ITEM RESET VALUE re...

Страница 265: ...lues 1 to 48 m a real input value indicating the gain factor m in the linear equation y mx b b a real input value indicating the offset value b in the linear equation y mx b DATA ITEM RESET VALUE m 2...

Страница 266: ...function enables measurement channels for Limit Events on the specified LXI Trigger Bus line Each of the eight LXI Trigger Bus lines can have a minimum and or maximum limit defined for any and all of...

Страница 267: ...hen an over limit condition is met DATA ITEM RESET VALUE latches 0 DESCRIPTION This function sets LXI Trigger Bus lines that will be latched for LXI Limit Event outputs When latching is enabled the tr...

Страница 268: ...n 0 0x00 VTEX1629_LXI_LINE_ZERO LXI LINE 0 1 0x01 VTEX1629_LXI_LINE_ONE LXI LINE 1 2 0x02 VTEX1629_LXI_LINE_TWO LXI LINE 2 3 0x03 VTEX1629_LXI_LINE_THREE LXI LINE 3 4 0x04 VTEX1629_LXI_LINE_FOUR LXI L...

Страница 269: ...T VTEX1629_LXI_INTERNAL_EXTERNAL status vtex1629_set_lxibus_configuration master_instrumentHandle VTEX1629_LXI_LINE_ONE VTEX1629_LXI_OUTPUT VTEX1629_LXI_INTERNAL_EXTERNAL portion of configuring a slav...

Страница 270: ...Trigger Bus channels This function only sets what will be output by the bus but does not actually enable the outputs See vtex1629_set_lxibus_configuration for information on enabling the output The ou...

Страница 271: ...While in pattern mode the instrument can accept arm events from the LXI Trigger Bus digital I O bus internal timer and the software ARM command There is no need to explicitly enable the software arm...

Страница 272: ...his parameter is often set to the same value as lxiOutput there are cases where it might be set to a different value For instance when the device is configured as a master device in a star multi box c...

Страница 273: ...0 0 timer 0 lxiOutput VTEX1629_LXI_LINE_NONE lxiInput VTEX1629_LXI_LINE_NONE DESCRIPTION This function configures the EX1629 s pattern trigger mode of operation This mode allows the EX1629 to accept...

Страница 274: ...es the lxiOutput parameter specifies the LXI Trigger Bus line that will be used to communicate the trigger event to the slave devices It is also necessary to configure this LXI Trigger Bus line to be...

Страница 275: ...a list of channel numbers for which the Poisson ratio will be set Valid input values 0 to 47 numberOfChannels the size of the channels list Valid input values 1 to 48 poissonRatio a real input value...

Страница 276: ...s or as a slave device that receives its sample clock from another device When operating in standalone mode sampleClockMode should be configured as a master The inLine parameter indicates the LXI line...

Страница 277: ...0 postTrigSampleCount an integer input value indicating the desired post trigger sample count Valid input values 0 to 400000000 DATA ITEM RESET VALUE preTrigSampleCount 0 postTrigSampleCount 1000 DESC...

Страница 278: ...ng frequency of all channels of the EX1629 The EX1629 offers a discrete number of sample frequencies Programmed values that fall between valid values will be rounded to the closest valid value See Sam...

Страница 279: ...8 DATA ITEM RESET VALUE channels 0 to 47 DESCRIPTION This function defines a list of channels which will be sampled in the data acquisition process The term scanlist is used although all channels are...

Страница 280: ...given list of channels VI_TRUE 1 will enable the shunt resistors for the given list of channels and VI_FALSE 0 will disable the shunt resistors for the given list of channels DATA ITEM RESET VALUE ena...

Страница 281: ...RCE_IS_LOCAL Internal local 4 0x04 VTEX1629_SHUNT_SOURCE_TEDS TEDS remote Local and Remote refer to how the shunt resistor is connected to the bridge For Local the connection is made within the EX1629...

Страница 282: ...AMPLE ViSession instrumentHandle ViStatus status ViInt32 channels 0 1 2 3 status vtex1629_set_shunt_source instrumentHandle channels 4 SHUNT_SOURCE_TEDS Optional LED 390 390 Rshunt DS2430AP 2 1 RCAL U...

Страница 283: ...ront panel remote 1 0x01 VTEX1629_FRONT_PANEL_LOCAL Front panel local 2 0x02 VTEX1629_INTERNAL_REMOTE Internal remote 3 0x03 VTEX1629_INTERNAL_REMOTE Internal local 4 0x04 VTEX1629_TEDS_REMOTE TEDS re...

Страница 284: ...indicating whether strain measurements will be returned in units of strain or microstrain Passing a value of VI_TRUE 1 will configure the instrument to return microstrain while passing a value of VI_...

Страница 285: ...er device When operating in standalone mode synchMode should be configured as a master The inLine value indicates the LXI line that should be used as the synch input This value is applicable regardles...

Страница 286: ...truments Corp 286 EX1629 Command Set EXAMPLE ViSession instrumentHandle ViStatus status status vtex1629_set_synch_source instrumentHandle VTEX1629_SYNC_MODE_MASTER VTEX1629_LXI_LINE_ONE VTEX1629_LXI_L...

Страница 287: ...ize of the channels list Valid input values 1 to 48 tareValue a real input value indicating the tare value to set for all the indicated channels DATA ITEM RESET VALUE tareValue 0 00000 DESCRIPTION Thi...

Страница 288: ...device Valid input values 0 to 32 tedsInfo an integer input array specifying the TEDS data to be written Each element of this array specifies a byte of TEDS data and the array should not contain any m...

Страница 289: ...an integer input value that specifies the trigger count for the EX1629 Valid input values 1 to 231 1 Setting this parameter to 0 makes the trigCount infinite DATA ITEM RESET VALUE trigCount 1 DESCRIP...

Страница 290: ...receiving a TRIG event before it begins to acquire data The actual delay exhibited by the EX1629 is dependent on the sample frequency set by calling the vtex1629_set_sample_frequency function The act...

Страница 291: ...G_SRC_LXI1_NEG LXI 1 Negative Edge 12 0x0C VTEX1629_TRIG_SRC_LXI2_NEG LXI 2 Negative Edge 13 0x0D VTEX1629_TRIG_SRC_LXI3_NEG LXI 3 Negative Edge 14 0x0E VTEX1629_TRIG_SRC_LXI4_NEG LXI 4 Negative Edge...

Страница 292: ...trigger events from multiple sources it is necessary to reserve one of the LXI Trigger Bus line to communicate these events within the device and to other devices in a multi device configuration If t...

Страница 293: ...s to 4294 967295 s DATA ITEM RESET VALUE timer 0 DESCRIPTION This function sets the trigger timer period for the EX1629 This is the amount of time in seconds that the EX1629 will wait before generati...

Страница 294: ...annels list Valid input values 1 to 48 unstrainedVoltage a real input value that indicates the unstrained voltage to set for the given list of channels DATA ITEM RESET VALUE unstrainedVoltage 0 000000...

Страница 295: ...s obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function sends a software generated arm event to the EX1...

Страница 296: ...plicable to this function DESCRIPTION This function sends a software generated synchronization event to the device This is only valid when the device is a synch master see vtex1629_set_synch_source NO...

Страница 297: ...ained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function sends a software generated trigger event to the EX16...

Страница 298: ...ication should allocate VTEX1629_MAX_DIGEST_LENGTH bytes digest the stored configuration s digest digestActualSize the actual size of the configuration digest DATA ITEM RESET VALUE Not applicable to t...

Страница 299: ...is handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function initiates the trigger system Specifi...

Страница 300: ...s handle is obtained by the function and remains valid until the session is closed DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function unlocks the EX1629 instrument if the...

Страница 301: ...equal to VTEX1629_MAX_MLAN_DATA_LEN DATA ITEM RESET VALUE Not applicable to this function DESCRIPTION This function writes a variable sized block of MLAN commands and data to the TEDS EEPROM indicated...

Страница 302: ...n DESCRIPTION This function resets the offset values of the unit before a measurement is taken It is designed to be a shorter calibration process than self calibration The overRide parameter is used i...

Страница 303: ...ted FFBFFC09FB VTEX1629_ERROR_VXI_11 VXI 11 Error FFBFFC09FC VTEX1629_ERROR_TRIGGER_SYSTEM_ERROR Trigger system error FFBFFC09FD VTEX1629_ERROR_OUT_OF_LINK_IDS Link ID failure FFBFFC09FE VTEX1629_ERRO...

Страница 304: ...supported remote procedure call FFBFFC0A28 VTEX1629_ERROR_DATA_FIFO_ERROR Error storing data in the FIFO FFBFFC0A29 VTEX1629_ERROR_SAMPLE_COUNT Invalid sample Count FFBFFC0A2A VTEX1629_ERROR_INCORRECT...

Страница 305: ...RROR_CAL_SELF_CAL_NOT_PRESENT Self calibration data is not present FFBFFC0A52 VTEX1629_ERROR_FPGA_TRIGINIT_NOT_IN_IDLE_STATE Trigger state machine is not in the idle state FFBFFC0A53 VTEX1629_ERROR_FP...

Страница 306: ...VTEX1629_ERROR_INVALID_TRIGGER_DELAY Invalid trigger delay parameter FFBFFC0A7A VTEX1629_ERROR_INVALID_TIMER_PERIOD Invalid timer period parameter FFBFFC0A7B VTEX1629_ERROR_INVALID_MLAN_DATA_LEN Inva...

Страница 307: ...EX1629_ERROR_CONF_LIMIT_NOT_SUPPORTED_AT_CURR_FS Summary reporting or detailed reporting not supported for sampling frequency greater than 1 kHz FFBFFC0AA0 VTEX1629_ERROR_FS_NOT_SUPPORTED_FOR_CONF_LIM...

Страница 308: ...ERROR_SCANLIST_CONTAINS_BAD_CHANNEL Scanlist contains channels that failed calibration FFBFFC0AC7 VTEX1629_ERROR_INVALID_LID Invalid link ID FFBFFC0AC8 VTEX1629_ERROR_NOT_CONNECTED Error Not connected...

Страница 309: ...T_BRIDGE_NOT_COMPLETE Input bridge not complete FFBFFC0AE6 VTEX1629_WARNING_CAL_BUFFERSIZE_SMALLER_THAN_ACTUAL_SIZE Warning the passed in buffer buffer size are not large enough to hold all of the cal...

Страница 310: ...VTI Instruments Corp 310 EX1629 Command Set...

Страница 311: ...ve instruments These signals are distributed to the slaves via the LXI Trigger Bus NOTE The sample clock and synchronization signals may only be distributed via the LXI Trigger Bus Further only an EX1...

Страница 312: ...T DIGITAL I O VXI Technology LO HI CALIBRATION SENSE Master Slave 2 Slave 1 Slave n Terminator Terminator FIGURE A 1 DAISY CHAIN CONFIGURATION NOTE Due to signal integrity concerns the maximum number...

Страница 313: ...TION SENSE Terminator Terminator Terminator Terminator Trigger Bus Hub Master Inputs on LXI 0 3 Outputs on LXI 4 7 Slave 2 Inputs on LXI 4 7 Slave 1 Inputs on LXI 4 7 Slave Inputs on LXI 4 7 n FIGURE...

Страница 314: ...nt such as a positive rising edge on LXI Line 3 The Master and the Slave s instruments are configured identically and some external device is used to generate an LXI Trigger Bus event The next simples...

Страница 315: ...nalog Ant Aliasing Filter 1 pole RC CIC compensation filter and FIR decimation filter Butterworth Bessel IIR filters with variable fc C6713 DSP fs FIR 100dB stopband attn ripple 0 005dB where fso inpu...

Страница 316: ...0938 1 173450 13 49200 250 97 00 40 5 0 479686 0 709252 0 940938 1 173450 13 38250 200 77 60 50 5 0 479686 0 709252 0 940938 1 173450 13 34600 166 67 64 67 60 5 0 479686 0 709252 0 940938 1 173450 13...

Страница 317: ...band indicated in the table for a particular fs or if they must reject specific frequencies the user can make use of the IIR filters explained later in this section CIC Filter The CIC filter in the FP...

Страница 318: ...et to 0 the DSP determines the order by assuming attenuation of 200 dB in stopband The filter order MUST be specified for Bessel filters the DSP designs a filter implemented as biquad sections The max...

Страница 319: ...e group delay of all channels can be queried using the vtex1629_get_IIR_filter_configuration function Group delay values for channels 0 16 and 32 can then be used along with the group delays for the o...

Страница 320: ...throughout the passband The warping inherent in the BLT method upsets this linearity The MZT does not warp the frequency scale so a digital Bessel filter designed by this method will have a near linea...

Страница 321: ...function is implemented is provided A variant of the GET_URN function can be used to search through multiple devices in order to select a specific device but the example version of this function only...

Страница 322: ...individual functions for WRITE READ and COPY can cause data loss and the recommended method is to use the WRITE_AND_COPY command and read main memory COPY_SCRATCHPAD allows the user to transfer the sc...

Страница 323: ...st byte for length SendPkt sendLen CMD_RESET SendPkt sendLen CMD_GETBUF SendPkt 0 sendLen 1 MLanHostPacketSend SendPkt channel recLen MLanHostPacketReceive RecPkt channel MLAN_PACKET_SIZE return recLe...

Страница 324: ...ength 3 02 84 85 got a packet without errors on receive Packet length 3 03 84 86 02 This time 3 bytes were received The 84 for CMD_RESET and then 86 02 From IEEE 1451 4 Annex G 86 is the code for CMD_...

Страница 325: ...de of the device in this case indicating that it is a DS2430 The 14 is the first byte of the unique serial number and the 08 before it is the length of that serial number The DS2431 s family code is 2...

Страница 326: ...device Since the entire scratchpad length is being written that must be included Then the data length block the WRITE_SCRATCHPAD command itself and the 0 which is the address in memory that the scratc...

Страница 327: ...ad_2430 int channel int sendLen recLen 0 sendLen 1 reserve first byte for length access the current device with address in DATA_ID SendPkt sendLen CMD_ML_ACCESS construct a block of communication to M...

Страница 328: ...access the current device with address in DATA_ID SendPkt sendLen CMD_ML_ACCESS construct a block of communication to MicroLAN SendPkt sendLen CMD_ML_DATA SendPkt sendLen 3 block length SendPkt sendL...

Страница 329: ...0 sendLen 1 reserve first byte for length access the current device with address in DATA_ID SendPkt sendLen CMD_ML_ACCESS construct a block of communication to MicroLAN SendPkt sendLen CMD_ML_DATA Se...

Страница 330: ...Because the read and write is accomplished in a single command data integrity cannot be verified before it is copied to memory e g a READ_SCRATCHPAD command cannot be performed in the middle of a WRIT...

Страница 331: ...y However since they are issued in a single MLAN buffer the device will not be powered down and will not have a chance to lose its volatile data The example output of the WRITE_AND_COPY command is fai...

Страница 332: ...e the frame MLanHostPacketSend SendPkt channel CRCcalc SendPkt 6 11 recLen MLanHostPacketReceive RecPkt channel MLAN_PACKET_SIZE return recLen Notice first that in comparison to the DS2430 scratchpad...

Страница 333: ...tput for the WRITE_SCRATCHPAD command for the DS2431 is very similar to the WRITE_SCRATCHPAD for the DS2430 with the exception that the data is shorter sent packet without errors Packet length 17 10 8...

Страница 334: ...h access the current device with address in DATA_ID SendPkt sendLen CMD_ML_ACCESS construct a block of communication to MicroLAN SendPkt sendLen CMD_ML_DATA SendPkt sendLen 5 block length SendPkt send...

Страница 335: ...nt totRecLen 0 int i 0 for i 0 i float DS2431_MEMORY_LEN float EX1629_MAX_TEDS_READ i sendLen 1 reserve first byte for length access the current device with address in DATA_ID SendPkt sendLen CMD_ML_A...

Страница 336: ...2 F0 60 00 85 got a packet without errors on receive Packet length 39 26 82 00 0A 22 F0 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 sent packet w...

Страница 337: ...ratchpad address must be between 0 and 88 hex n return 1 SendPkt sendLen address SendPkt sendLen 0 the 5 bytes of data to write for i 0 i 2 DS2431_SCRATCHPAD_LEN DS2431_SCRATCHPAD_LEN 1 i 3 strncpy by...

Страница 338: ...l write ADDITIONAL NOTES Checksums It should be noted that a page in the main memory of 1 Wire device consists of 32 bytes according to the IEEE 1451 4 specification Each page of memory is supposed to...

Страница 339: ...esult 0 ViChar error 256 add platform protocol specific code here result vtex1629_write_teds_MLAN vi channel send_packet 0 1 send_packet if result 0 vtex1629_error_message vi result error printf Error...

Страница 340: ...to platform endian ness before inverting the CRC This is what the MLAN bus master will return to us on a little endian host computer like an x86 CPU Intel or AMD a byte swapped inverted CRC16 This wa...

Страница 341: ...Mb Flash Intel JS28F128J3D75 No Kernel and File System No N A Time Config Yes Go to webpage change values Factory cal coeffecients Yes Cannot clear can overwrite by running factory cal again Stored se...

Страница 342: ...VTI Instruments Corp 342 EX1629 Onboard Memory...

Страница 343: ...IC compensation filter 315 FIR decimation filter 316 IIR filters 316 E engineering unit conversion 43 engineering unit conversion calculations full bridge bending Poisson strain 47 full bridge bending...

Страница 344: ...DS2430 327 DS2431 329 333 READ_SCRATCHPAD 319 320 DS2430 325 DS2431 331 reboot web page 69 reset network configuration 62 reset web page 69 retreiving data 85 asynchronous streaming data interface 87...

Страница 345: ...629_get_excitation_enabled 154 vtex1629_get_fifo_count 155 vtex1629_get_gain 156 vtex1629_get_gauge_factor 157 vtex1629_get_half_bridge_lead_wire_desensitization 158 vtex1629_get_IIR_filter_configurat...

Страница 346: ...i_bus_output 268 vtex1629_set_lxibus_configuration 266 vtex1629_set_pattern_arm_configuration 269 vtex1629_set_pattern_trig_configuration 271 vtex1629_set_poisson_ratio 273 vtex1629_set_sample_clock_s...

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