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EASY-DRIVER – User’s Manual 

 
 

49 

 

 

 “MWG” Command 

 
 

 

The ‘MWG’ command lets users write a desired “value” (cell_content) item in 

a defined EEPROM cell. 
 

The correct form format for this command is as follows: 

 

MWG:

cell_num

:

cell_content

\r

 

 
where:  

-

 

cell_num 

is the EEPROM cell number; 

-

 

cell_content 

is the ASCII content to be written to the EEPROM cell 

cell_num

 

 

This  “value”  section  of  the  EEPROM  is  used  to  store  descriptive  calibration 

parameters, identification, thresholds, etc. Only some cells can be overwritten – please 
refer to 

Table 4

 

 

 

Replies from the power supply are in the form ‘#AK\r’, or ‘#NAK\r’; this non-

acknowledgment reply is generated when: 
 

 

the cell number 

cell_num

 is out-of-range; 

 

the selected cell is read only; 

 
 

Examples: 
 

MWG example of a correct write (cell 13 is user accessible): 

 

MWG:13:0.055

\r

 

#AK

\r

 

 
 
MWG example (cell 1 is read only): 

 

MWG:1:15.234

\r

 

#NAK

\r

 
 

Note: 

 

In  order  to  make  changed  parameter  effectively  updated  and  in 

operation  it  is  necessary  to  send  the  MPUP  command  to  the  EASY-DRIVER 
module first,

 see ‘MPUP Command’ Section for more information. 

 

Содержание EASY-DRIVER 0520

Страница 1: ...Easy Dr ver Compact Digital Bipolar Power Supply Series User s Manual All Rights Reserved CAEN ELS s r l Rev 1 18 October 2017 MAGNET POWER SUPPLY SYSTEMS...

Страница 2: ...2 This product is marked CAEN ELS s r l c o AREA Science Park S S 14 km 163 5 34149 Basovizza TS Italy Mail info caenels com Web www caenels com...

Страница 3: ...ng EASY DRIVER yyzz Where yy is the maximum output current expressed in Amps zz is the maximum output voltage expressed in Volts Additional useful manuals are Visual EASY DRIVER Quick Start Guide For...

Страница 4: ...INTERLOCK CONNECTION 19 2 7 GROUNDING 20 3 EASY DRIVER DESCRIPTION 21 3 1 SYSTEM ARCHITECTURE 21 3 2 INTERNAL PROTECTIONS 22 Input AC Fuses 22 Over Voltage Clamping 22 DC Link Under Voltage 22 MOSFETs...

Страница 5: ...mand 44 MRTS Command 45 MRV Command 46 MST Command 47 MVER Command 48 MWG Command 49 MPUP Command 50 MWI Command 51 6 IP ADDRESS CONFIGURATION 52 6 1 DEVICEINSTALLER SOFTWARE 53 7 EASY DRIVER REMOTE R...

Страница 6: ...chnical Specification chapter Display 1 13 July 7th 2016 Updated Table 10 for Custom model 0112 1 14 July 8th 2016 Fixed minor errors 1 15 August 9th 2016 Updated the reboot procedure 1 16 September 8...

Страница 7: ...Storage Humidity 5 to 90 RH non condensing The following symbols are used within this manual or are reported in the box and along this manual Caution Documentation must be consulted in all cases wher...

Страница 8: ...ase read carefully the manual before operating any part of the instrument Do NOT open the boxes CAEN ELS d o o declines all responsibility for damages or injuries caused by an improper use of the Modu...

Страница 9: ...instrument for possible cracks or breaks before each use Do not operate the device around explosives gas vapor or dust Always use the device with the cables provided Turn off the device before establ...

Страница 10: ...IVER 0220 rated at 2A 20V output Each power supply unit fits in a single 19 inch 1U crate and implements a completely digital control loop with a specific Pulse Width Modulation PWM generation techniq...

Страница 11: ...ER unit is housed in a 1U 19 crate that has embedded cooling front to rear air flow The front panel of the EASY DRIVER is shown in Figure 1 Figure 1 front view of the EASY DRIVER unit Output connectio...

Страница 12: ...light toggles at every character reception and it is a communication heartbeat indicator DIAG LED the green light toggles at every diagnostic routine execution If this LED is not toggling the interna...

Страница 13: ...supply for use Step Checklist Description 1 Initial inspection Physical inspection of power supply 2 Mounting Installing the power supply ensuring proper ventilation 3 AC Input Power Connection Conne...

Страница 14: ...EASY DRIVER User s Manual 14 scratched or cracked Keep all packing material until the inspection has been completed If damage is detected compile the RMA form available to the CAEN ELS web site...

Страница 15: ...an cooled the air intake is at the front panel and the exhaust is at the rear panel Upon installation allow cooling air to reach the front panel ventilation inlets Allow minimum 10 cm of unrestricted...

Страница 16: ...tom of the output connector to the load 2 4 AC Input Power Connection The AC line input connector on the rear panel is a standard IEC C14 male inlet socket with include fuse holder Figure 5 The requir...

Страница 17: ...ord All the EASY DRIVER power supplies are directly shipped with the corresponding power cord suitable for the destination country of the purchase Power supply side connector is a standard IEC C13 plu...

Страница 18: ...vent excessive output power consumption Suggested wire sizes are listed in the following table Wire Cross Section Area mm2 Resistivity km Maximum cable length in meters to limit voltage drop to be les...

Страница 19: ...nit has one input interlock and one output status signal that are directly available on the rear panel interlock connector The interlock connector is Weidmuller 4 pin male connectors Ordering Code 159...

Страница 20: ...be configured to switch off the output The Interlock pins accept a 5 V to 12 V signal or Open Short contact i e dry contact to disable and trigger the Interlock Fault Activation direction must be conf...

Страница 21: ...C DC output power stage electronics a full bridge DC DC section with a control communication section Basic internal connections between basic building blocks are hereafter represented The AC DC module...

Страница 22: ...s some of them redundant are also implemented and here listed DC Link under voltage protection MOSFETs over temperature Shunt resistor over temperature An overview of all available protections as well...

Страница 23: ...re sensor The internal logic disables the H Bridge when the temperature rises the defined threshold value stored in EEPROM cell 20 and sets a MOSFET over temperature flag in the status register thus g...

Страница 24: ...ation coefficient 8 c3V_read 3rd order voltage calibration coefficient 9 c0 DC_Link Zero order DC link calibration coefficient 10 c1 DC_Link 1st order DC link calibration coefficient 11 c2 DC_Link 2nd...

Страница 25: ...receive an acknowledgment reply from the power supply i e AK r In order to make the module apply the value Kp 0 0015 to its internal regulator it is necessary to send the MPUP r command Value Section...

Страница 26: ...t status register A brief description of all the binary flags is here presented Module ON bit 0 this bit is set if the module is enabled and correctly regulating output current Fault bit 1 this bit is...

Страница 27: ...DRIVER User s Manual 27 External Interlock bit 5 this bit is set when the corresponding external interlock trips The setting this external interlock bit implies the simultaneous setting of the fault...

Страница 28: ...reen shows in sequence the following information the module type ID and firmware release the module IP address the module MAC address When the firmware initialization has been completed the display sh...

Страница 29: ...ber termination character A complete list of commands except for reserved commands is herein presented and an overview for each command syntax and functionality follows The extreme configurability of...

Страница 30: ...re R MRV Read output voltage value R MST Read module internal status register R MVER Power Supply firmware version R MWG Write selected EEPROM value cell W MPUP Reload EEPROM values in DSP W MWSR Writ...

Страница 31: ...ase of a wrong unrecognized command or if the system is in local operation mode and a write command is sent to the controller write commands are marked with a W in Table 6 a standard reply preceded by...

Страница 32: ...form FDB status_reg i_set i_read r where status_reg is the 8 bit wide status register of the power supply formatted in an hexadecimal string this status string has a fixed length of 2 byte 2 ASCII ch...

Страница 33: ...set_register parameters Examples Suppose that the power supply is ON and it is regulating at a 2 0000A output current The user then sends the following command FDB 50 03 2453 r FDB 01 03 2453 02 0000...

Страница 34: ...the H Bridge driver possible voltage overshoots obtained from the energy stored by a large inductive load is heavily limited by a clamp power circuit rated at 110 of DC Link voltage Replies from the E...

Страница 35: ...the power supply to a MON r command are in the form AK r when the command is correctly executed or NAK r The NAK r reply is obtained if the power supply module is in a FAULT condition it is necessary...

Страница 36: ...be used in order to perform a complete reset of the module status register this is needed for example to enable the output again after a fault condition has been fixed Replies from the EASY DRIVER mo...

Страница 37: ...d between 0 and 511 The value section of the EEPROM is used to store calibration parameters identification thresholds etc and other user definable factors For more information on how to write paramete...

Страница 38: ...resented with a 5 digit precision Replies from the power supply to this command are in the following form MRI value r where value is the output current value readback A The MRI command being a reading...

Страница 39: ...following format MRID module_id r where module_id is the module identification stored in non volatile memory as an ASCII string This command is equivalent to the MRG 27 r command being the cited cell...

Страница 40: ...d one makes the power supply go from the previous to the actual current value performing a ramp defined by a slew rate in A s stored in the EEPROM cell 30 The EASY DRIVER module responds with acknowle...

Страница 41: ...of the power supply actual ramp slew rate setting Replies from the EASY DRIVER power supply to this command are in the following format MRSR value r where value is the used Slew Rate for ramp A s Exam...

Страница 42: ...d to set the value of the ramp slew rate MWSR value r where value is the Slew Rate for the ramp A s The accepted slew rate values are in the range 0 1000 The start up slew rate value is the one that i...

Страница 43: ...Y DRIVER module input terminals Replies from the power supply to this command are in the following format MRP value r where value is the measured DC Link voltage V This value is presented to the user...

Страница 44: ...nted to the user with a 0 01 C 0 01 K resolution Replies from the EASY DRIVER power supply to this command are in the following format MRT value r where value is the temperature value C Celsius measur...

Страница 45: ...he user with a 0 01 C 0 01 K resolution Replies from the power supply EASY DRIVER controller to this command are in the following form MRTS value r where value is the temperature value C Celsius measu...

Страница 46: ...they are presented with a 5 digit precision Replies from the power supply controller to this command are in the following form MRV value r where value is the output voltage readback V measured at the...

Страница 47: ...MST value r where value is the ASCII representation of the internal status register value composed by 2 hexadecimal digits and corresponding to the 8 bit wide status register The MST command being a r...

Страница 48: ...installed on the module It is important to notice that EASY DRIVER modules include two firmware versions one for the communication DSP one for the control DSP keep them up to date by checking for upda...

Страница 49: ...meters identification thresholds etc Only some cells can be overwritten please refer to Table 4 Replies from the power supply are in the form AK r or NAK r this non acknowledgment reply is generated w...

Страница 50: ...he EEPROM to effectively update and make operative the new value it is possible to use the MPUP r command either than reboot the EASY DRIVER Replies from the EASY DRIVER to MPUP r command are in the f...

Страница 51: ...ue r where value is the desired output current value A Replies from the power supply are in the form AK r or NAK r this non acknowledgment reply is generated as it is for the MRM command when the set...

Страница 52: ...s the DeviceInstaller software a basic Telnet connection to Port 9999 Please note that all modules are shipped with a standard IP address 192 168 0 10 It is very important before running the IP addres...

Страница 53: ...o obtain minimum delays maximum speed performance and to avoid possible communication problems Please note that for a point to point direct connection a twisted Ethernet cable must be used The next fe...

Страница 54: ...address field and click on Next Click on the Assign button Wait for the assignment procedure to end and then click Finish The new module IP address should now be assigned and the success of the operat...

Страница 55: ...04 00 00 00 00 00 00 00 o wait 100ms o 0x 1B 04 00 00 00 00 00 00 00 o wait 100ms o 0x 1B 04 00 00 00 04 00 00 00 C now the module should turn on again and will be ready for operation in about 5s It...

Страница 56: ...Bipolar Current setting resolution 16 bit Output current readback 20 bit Output voltage readback 20 bit Output current ripple on resistive load RMS in ppm FS 100 40 200 100 Output current stability 40...

Страница 57: ...r Drivers EPICS Connection Ethernet 10 100 Mbit TCP IP Extra Features User settable Slew Rate Value Firmware Remote Update Dimensions 19 1U 264 mm 19 1U 295 mm with output connector Input Nominal Volt...

Страница 58: ...EASY DRIVER User s Manual 58 9 Mechanical Dimensions Mechanical dimensions of the EASY DRIVER power supply crate are hereafter shown all dimensions in mm...

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