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- 37 - 

Example of rate in feet/sec from a 1024 pulse/revolution quadrature encoder 

Application: 

Transmit rate in feet/sec with 3 decimals using a 1024 pulse/revolution quadrature 

encoder tied to a roller with 1.782 ft circumference. Have 4 updates/sec.  

 

 

Solution:

  

•

 

Under Input+Display tab, set Signal Input Mode to Quadrature, Function to Rate, Gate Time 
to 0.22 sec, and Time Out to 1.00 sec. Note that quadrature rate only works with Extended 
version. Under “Pulses per Rev”, press the F1 key for details on zero indexing.    

•

 

Under  Scaling  tab,  apply  same  scaling  to  clockwise  (CW)  and  counterclockwise  (CCW) 
rates, which are subtracted for net rate. Set decimal points to three places, which requires 
the units to be in one thousands of a foot/sec. If “Scale, Offset” scaling method is selected, 
set Scale to +1.74023 one thousands of a foot per/sec per pulse/sec. If Coordinates scaling 
method  is  selected,  set  High  In  to  1024  pulses/sec  and  High  Read  to  1.782  ft/sec.  Set 
Trigger Slope B to change count direction. 

 

 

Содержание LT Series

Страница 1: ...T SERIES TRANSMITTERS PULSE INPUTS 4 20 MA OUTPUT RS232 RS485 I O USER MANUAL LAUREL Electronics Inc 3183 G Airway Ave Costa Mesa CA 92626 USA Tel 714 434 6131 Fax 714 434 3766 Website www laurels com...

Страница 2: ...quency 2 channels rate 2 channels total 2 channels period stopwatch time interval Extended main board Above plus rate and total simultaneously linear ized inputs using up to 180 points arithmetic func...

Страница 3: ...18 9 2 Period Modes 22 9 3 Total Modes 23 9 4 Timing Modes 27 9 5 Phase Angle 30 9 6 Power Factor 31 9 7 Duty Cycle 32 10 V TO F CONVERTER SIGNAL CONDITIONER BOARD 33 11 QUADRATURE SIGNAL CONDITIONER...

Страница 4: ...t jumpered for RS232 or full duplex RS485 same jumper settings Half duplex RS485 is also selectable either via internal or external jumpers Three serial protocols are software selectable Modbus RTU Mo...

Страница 5: ...1 Pins 1 3 is colored Green to differentiate it from other input and output connectors The 12 32 Vac or 10 48 Vdc power connector is colored Black This transmitter has no power switch It will be in op...

Страница 6: ...6 6 TRANSMITTER FIELD WIRING...

Страница 7: ...Input 4 Z Input Excitation 5 Z Input Exc return 6 QUADRATURE SIGNAL INPUTS Differential or Complementary Inputs A Channel In B Channel In Zero Index In or Excitation Output A Input 1 Excitation 2 B I...

Страница 8: ...t of your PC Download the file ISx_x_x exe from our website and double click on the file name Click on Install Instrument Setup Software and follow the prompts To launch IS software press on Start Pro...

Страница 9: ...rom your counter transmitter Click on View Setup to bring up screens which allow you to easily edit the setup file using pull down menus and other selection tools You can download or put your edited f...

Страница 10: ...ng on the Control Inputs field opens a pull down menu which allows selection of the roles of Control Input 1 Control Input 2 and simultaneous Control Inputs 1 and 2 For example with a Dual Pulse Input...

Страница 11: ...ethods 1 direct entry of Scale and Offset and 2 the Coordinates of 2 Points me thod where Low In Low Read and High In High Read data points are entered numerically Click on the Filter tab Click on the...

Страница 12: ...the Communication tab Click on the Communication tab Click on the Communication tab Click on the Communication tab to view the communication parameters that you used to establish default communicatio...

Страница 13: ...three formats to display input data on your PC monitor Use the Pause and Continue buttons to control the timing of data collection then press Print for a hardcopy on your PC printer List presents the...

Страница 14: ...14 Plot Plot Plot Plot Graph Graph Graph Graph...

Страница 15: ...quadrature input type input termi nation phase for up counting count by options and zero index polarity See Section 11 4 On the main board to set the serial communication signal RS232 or RS485 termina...

Страница 16: ...r the expected signal voltage This voltage must be outside of the high and low thresholds per the following table or the transmitter will not operate properly The larger the difference between the hig...

Страница 17: ...ll up to 5V 10 kOhm pull down to 5V Contact Debounce A4 B4 b a c c None 3 msec 50 msec Common Jumper Settings Input Type Vmax A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 Logic levels 250V a b NPN open collector NA...

Страница 18: ...ard determines Rate for Channel A Item 1 and Total for Channel A Item 2 since last reset Total can count down from an offset by entering a negative scale factor Rates A B A B AxB A B A B A B 1 Extende...

Страница 19: ...and Time Out to 2 sec Under Display set Type to Norml 999999 Under Scaling tab set decimal point to 111111 If Scale Offset is selected as scaling method set Scale to 1 00000 Multiplier to 1 and Offse...

Страница 20: ...ab set Decimal Point to two places If Scale Offset is selected as scaling method set Scale to 1 00000 and Multiplier to 10 Product of Scale and Multiplier will ensure that 1000 Hz are displayed as 10...

Страница 21: ...ected as scaling method set Scale to 1 63621 with a multiplier of 1000 The scale of 1 63621 is the inverse of K factor namely 0 027270 gallons per pulse multiplied by 60 to go from the trans mitter s...

Страница 22: ...km hour or 1 pulse every 1 8 sec Set Time Out to its maximum of 199 99 sec since pulse rates will be very low when the ship starts Click on Read to display Item 1 A B The red field will change to gree...

Страница 23: ...by a control input on Channel B If the menu item SLOPE is set to 0 for Channel B a low input level on B allows counting and a high input level inhibits counting If the SLOPE for Channel B is set to 1...

Страница 24: ...Set Power On Total to Restore Total to retain total in event of power loss Under Scaling tab set Decimal Point to two places If Scale Offset is selected as scaling method set Scale to 2 72702 and Mul...

Страница 25: ...r A Rate set two decimals If Scale Offset is selected set Scale to 1 63621 and Multiplier to 100 This is inverse of K factor multiplied by 100 to change counts from gallons to hundredths of a gallon a...

Страница 26: ...tal will be Item 3 Set Gate Time to 0 sec to maximize the update rate Set Power On Total to Restore Total to retain total in event of power loss Under Scaling tab set both decimal points to two places...

Страница 27: ...op pulse on Channel B Timing is the same as for A to A except that positive or negative edges may be selected separately for Channels A and B This allows the pulse width measurement of single pulses b...

Страница 28: ...restore total following loss of power There will be 216 000 pulses hour or 0 0000046296 hours pulse Under Input Display tab set Mode to Total Function to A B and Gate Time to 0 sec Set Power On Total...

Страница 29: ...ll drop from 5V to 0V Under Input Display tab set Mode to Stopwatch Function to A to B and Gate time to 0 sec Set Display Type to Norml 999999 Native counts will be microseconds Under Scaling tab set...

Страница 30: ...ion Jumper the signal conditioner for maximum sensitivity to catch zero voltage crossings and minimize effects of amplitude jitter Apply one AC signal to Channel A and one to Channel B Under Input Dis...

Страница 31: ...ater than 90 Example of power factor measurement to 0 001 resolution Application Measure power factor with 0 001 resolution for two sinusoidal AC signals centered around 0 Solution As for phase angle...

Страница 32: ...s as of total period with 0 01 resolution over a time interval of 10 sec Output 0 100 to a 0 10V analog recorder Solution Under Input Display select Extended an extended transmitter is required for du...

Страница 33: ...d Offset or using the Coordinates of 2 Points method Measurements are averaged over a Gate Time which is programmable from 10 ms to 199 99 sec Selecting a long Gate Time provides a slower display upda...

Страница 34: ...able to Enabled and Power On Total to Restore Total to retain total in event of a power failure Under Scaling tab for VF 4 20 mA A Rate set Decimal Point to three places If Scale Offset scaling method...

Страница 35: ...re detailed information please see our Counter Manual which has a 16 page section on quadrature and zero indexing With differential quadrature inputs and an external supply connect ground of the exter...

Страница 36: ...pdate rate is set by a Gate Time which should be set to its minimum of 10 ms When the scaled total reaches a programmable Preset it is reset to Offset A zero index function can zero the counts when a...

Страница 37: ...quadrature rate only works with Extended version Under Pulses per Rev press the F1 key for details on zero indexing Under Scaling tab apply same scaling to clockwise CW and counterclockwise CCW rates...

Страница 38: ...and ATX to ARX same effect as internal jumpers To reset communications to 9600 baud command mode Custom ASCII protocol and Address 1 place a jumper at E1 and power up the transmitter Analog Output J4...

Страница 39: ...compared if deviation is set to zero The reading is the count in engineering units that is transmitted digitally and is also used for analog output For example if the transmitted reading is in gallons...

Страница 40: ...s and Band Deviation These define how Setpoint and Deviation are to be combined to set Alarm State Span Hysteresis for heater control Band Deviation for component testing In Split Hysteresis the relay...

Страница 41: ...RC time constants no filter 0 1 sec 0 2 sec 0 4 sec 0 8 sec 1 6 sec 3 2 sec and 6 4 sec The longer time constants provide superior noise filtering at the expense of fast response time Note that filte...

Страница 42: ...conditioner board stores its own stores its own voltage to frequency calibration constants EEPROM The dual channel pulse input signal conditioner and quadrature signal conditioner boards do not requir...

Страница 43: ...self prompting avoiding the need for detailed printed instructions This manual section is only intended as an introduction GETTING STARTED Download curve exe from the distribution CD into the same dir...

Страница 44: ...al of at least 3 5 character times If a silent interval of more than 1 5 character times occurs between two characters of the message frame the message frame is considered incomplete and is discarded...

Страница 45: ...eturns values in 2 s Complement Binary Hex format without a decimal point The displayed system decimal point can be read with FC03 at address 0057 Use only odd Register Addresses and an even number of...

Страница 46: ...sage Count Returns total number of messages detected on the bus including those not addressed to this Slave Excludes bad LRC CRC parity error or length 3 00 0C 00 00 Checksum Error Count Returns total...

Страница 47: ...RC Hi Byte RA Register Address SF Sub Function CR Carriage Return NR Number of Registers EC Error Code LF Line Feed NB Number of bytes LRC ASCII Checksum Modbus RTU Format FC Action 3 5 Char Byte Numb...

Страница 48: ...U 010 001 Modbus ASCII 020 001 Restart Com munications Request Response 010800010000B1CB 010800010000B1CB 010800010000F6crlf 010800010000F6crlf Meter Reset Request Response 01050001FF00DDFA None 01050...

Страница 49: ...cimal point is always furnished even when it follows the last digit Adding a Line Feed Character to the Basic Format Printers and other devices that receive the data may require a line feed character...

Страница 50: ...lar device its address is used in conjunction with the command and only that device responds The outputs of all of the devices on the bus are set to a high impedance state except the device being addr...

Страница 51: ...5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 A B 12 13 14 15 16 17 18 19 20 21 22 C D E F G H I J K L M 23 24 25 26 27 28 29 30 31 N O P Q R S T U V CHARS 3 4 Commands and Subcommands The examples below use a d...

Страница 52: ...ead bytes from Upper RAM Memory Q Write bytes to Upper RAM Memory X Read words from Non Volatile Memory W Write words to Non Volatile Memory CHAR 4 Command character Sub command Number of Bytes of RAM...

Страница 53: ...hex charac ters as shown below under RAM MEMORY ADDRESSES AND DATA DEFINITIONS General Reading and Writing Nonvolatile Memory Data Nonvolatile data is read and written as a continuous string of words...

Страница 54: ...main board Programming Via RS 232 from PC using Instrument Setup software and CBL04 cable Analog Output Output Levels 4 20 mA 0 20 mA 0 10V 10V to 10V Compliance at 20 mA 10V 0 500 ohm load Complianc...

Страница 55: ...r 0 1 mA 1 01 M for 0 10V Accuracy at 25 C 0 025 Span Tempco 0 003 of reading C Zero Tempco 0 003 of full scale C QUADRATURE SIGNAL CONDITIONER Signal Type Differential or single ended quadrature Tran...

Страница 56: ...shall not apply to defects resulting from 1 Improper or inadequate maintenance by Buyer 2 Unauthorized modification or misuse 3 Operation outside the environmental specifications of the product 4 Mis...

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