CGC PSU-CTRL-2D User Manual
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CGC PSU-CTRL-2D User Manual

Digital controller of double power supply units
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Page: 1/81
PSU-CTRL-2D, Rev.1-00
Digital Controller of Double Power Supply Units
Firmware Version 1-00
User Manual
Document version 2, created on Oct-15-2021
CGC Instruments
Hübschmannstr. 18 | D–09112 Chemnitz
Tel.: +49 (371) 355 098–55
Fax: +49 (371) 355 098–60
internet: www.cgc-instruments.com
e–mail: info@cgc-instruments.com

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Summary of Contents for CGC PSU-CTRL-2D

  • Page 1: Device Monitoring

    Page: 1/81 PSU-CTRL-2D, Rev.1-00 Digital Controller of Double Power Supply Units Firmware Version 1-00 User Manual Document version 2, created on Oct-15-2021 CGC Instruments Tel.: +49 (371) 355 098–55 internet: www.cgc-instruments.com Hübschmannstr. 18 | D–09112 Chemnitz Fax: +49 (371) 355 098–60...

  • Page 2: Table Of Contents

    Page: 2/81 PSU-CTRL-2D, Rev.1-00 Contents Technical Data..............7 Characteristics ................7 Digital Interface ................7 Description ..............8 Controller Configuration .............. 10 Configuration Management............13 Remote Control ................13 Quick Setup Guide ............15 Software Utilities............17 Utility COM-HVPSU2D-Control........... 17 General Control................ 19 System Monitoring ..............21 Device Monitoring ..............

  • Page 3: Controller Settings

    Page: 3/81 PSU-CTRL-2D, Rev.1-00 Function COM_HVPSU2D_DevicePurge ........ 50 Device Control................52 Function COM_HVPSU2D_GetInterlockEnable ...... 52 Function COM_HVPSU2D_SetInterlockEnable ...... 52 Function COM_HVPSU2D_GetMainState....... 53 Function COM_HVPSU2D_GetDeviceState ......53 Function COM_HVPSU2D_GetHousekeeping......54 Function COM_HVPSU2D_GetSensorData......55 Function COM_HVPSU2D_GetLEDData ........ 55 Management of the Power Supply Units ........56 Function COM_HVPSU2D_GetPSUState .......
  • Page 4 Page: 4/81 PSU-CTRL-2D, Rev.1-00 Function COM_HVPSU2D_SetConfigFlags ......72 Function COM_HVPSU2D_GetConfigList....... 73 Miscellaneous Functions............. 74 Function COM_HVPSU2D_GetSWVersion......74 Function COM_HVPSU2D_GetHWType......... 74 Function COM_HVPSU2D_GetHWVersion......75 Function COM_HVPSU2D_GetFWVersion ......75 Function COM_HVPSU2D_GetFWDate........76 Function COM_HVPSU2D_GetProductNo......76 Function COM_HVPSU2D_GetProductID....... 77 Function COM_HVPSU2D_GetUptime ........77 Function COM_HVPSU2D_GetTotalTime.......

  • Page 5: Configuration Management

    Page: 5/81 PSU-CTRL-2D, Rev.1-00 Figure List Fig. 1. Block diagram of the device..........9 Fig. 2. Device control logic............13 CGC Instruments Tel.: +49 (371) 355 098–55 internet: www.cgc-instruments.com Hübschmannstr. 18 | D–09112 Chemnitz Fax: +49 (371) 355 098–60 e–mail: info@cgc-instruments.com...
  • Page 6 Page: 6/81 PSU-CTRL-2D, Rev.1-00 Table List Tab. 1. Assignment of the control and status bits....... 12 Tab. 2. Command line parameters of the program COM- HVPSU2D-Control - General control......... 19 Tab. 3. Command line parameters of the program COM- HVPSU2D-Control - System monitoring......21 Tab.

  • Page 7: Software Utilities

    Page: 17/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities Software Utilities The software utilities can be found in the directory "Program" of the enclosed software package. Before using them with a device with a USB interface, the virtual USB port driver must be installed (see sec- tion "Driver Installation").
  • Page 8 Page: 18/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities COM6 opened for the communication port 0 Press '?' for help The utility enters the interactive mode and waits for command input. In case of any problems, check whether the port number matches the system settings and whether the connected device is powered on and working properly.

  • Page 9: General Control

    Page: 19/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities Tab. 2. Command line parameters of the program COM-HVPSU2D- Control - General control. Parameter Explanation -b, -B get the device buffer status (see function COM_HVPSU2D_GetBufferState) -z, -Z purge the communication (see function COM_HVPSU2D_DevicePurge)
  • Page 10 Page: 20/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities fer but may be too slow when the device data are queried periodically or when large data amounts should be transferred. In such cases, the communication speed can be set to a higher value using the parame- ter -$.

  • Page 11: System Monitoring

    Page: 21/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities Tab. 3. Command line parameters of the program COM-HVPSU2D- Control - System monitoring. Parameter Explanation get the device firmware version (see function COM_HVPSU2D_GetFWVersion) get the device hardware version (see functions COM_HVPSU2D_GetHWType and...

  • Page 12: Backing Up And Restoring The Data

    Page: 34/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities Tab. 9. Command line parameters of the program COM-HVPSU2D- Control - Backup and restore. Parameter Explanation -y FileName backup the NVM data into a text file with the name FileName -Y FileName...

  • Page 13: Utility Flashloader

    Page: 35/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities Utility FlashLoader FlashLoader is a simple Windows™ program running in text mode. It enables you to upgrade the firmware of the pulse controller. You should perform an upgrade when you have received or downloaded a new firmware file from the device manufacturer.
  • Page 14 Page: 36/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities If any error occurs, do not proceed with the firmware upgrade. If you cannot resolve the issues, contact the manufacturer. Note that even if the verification fails and the flash loader on the device remains active, it is safe to power the device off to restart it.
  • Page 15 Page: 37/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Utilities case, you should reattempt the upgrade with the command line pa- rameter -i: FlashLoader 6 Firmware.txt -$ -i This will prevent the utility on the host computer from initializing the flash loader utility on the microcontroller and it will only try to repro- gram the file Firmware.txt.

  • Page 16: Driver Installation

    Page: 38/81 User Manual PSU-CTRL-2D, Rev.1-00: Driver Installation Driver Installation Installation of the Virtual Port for the USB Interface The virtual port driver is required for the operation of the device with a USB interface. If your operating system is Windows™, please note the following: •...

  • Page 17: Software Interface

    Page: 39/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Software Interface The software interface for the device consists of a 32- or 64-bit dy- namic link library COM-HVPSU2D.dll. Both versions are located in the directory "Program" of the enclosed software package. The soft-...
  • Page 18 Page: 40/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The communication speed of the serial port defaults to 9600 baud but can be changed to any value up to 230.4 kbaud (see function COM_HVPSU2D_SetBaudRate). Please note that the highest speed can be used with any USB connection.

  • Page 19: Direct Command Control

    Page: 41/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface As a first parameter, most of the interface functions require the vari- able PortNumber, which is the number of the communication channel that should be used for the operation in question. This number is an unsigned integer that must be lower than COM_HVPSU2D_MAX_PORT, i.e.
  • Page 20 Page: 42/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface commands, Boolean parameters are used. They use the uppercase characters 'Y' for true and 'N' for false. An ASCII character string is transferred as is but without the null-termination. Instead, the termina- tion character of the command indicates the end of the string.
  • Page 21 Page: 43/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The direct control is summarized in the following sections by the items "Command" and "Response" below the declaration of a particular function. Note that several functions like COM_HVPSU2D_Open or COM_HVPSU2D_Close do not send any data to the device and thus do not have any equivalent direct control commands.

  • Page 22: Error Codes

    Page: 44/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Error Codes Tab. 10. Return values of the interface functions Return Error message Description value No error The data transfer was completed successfully. PortNumber out of The parameter PortNumber speci- range fied when calling the function is out of range.
  • Page 23 Page: 45/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Return Error message Description value Error setting the The data rate could not be set. baud rate Check if the host is able to commu- nicate at the desired speed. -100 Device not...
  • Page 24 Page: 46/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Tab. 11. I/O errors Return Error message Description value No error The data transfer was completed suc- cessfully. Port has not You attempted to use the communica- been opened yet tion channel before having opened it.
  • Page 25 Page: 47/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Return Error message Description value Wrong data The system could not write the proper amount written to amount of data to the port. the port Error setting the The system could not set the state of control lines of the port control lines.

  • Page 26: Communication Control

    Page: 48/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Communication Control Function COM_HVPSU2D_Open int COM_HVPSU2D_Open (WORD PortNumber, WORD COMNumber); Opens the communication channel and returns an error code accord- ing to Tab. 10. The function opens the channel with the number PortNumber and attaches it to the serial port with the number COMNumber.

  • Page 27: Function Com_Hvpsu2D_Setbaudrate

    Page: 49/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_SetBaudRate int COM_HVPSU2D_SetBaudRate (WORD PortNumber, unsigned & BaudRate); Command: $BBBBB Response: $BBBBB Sets the communication speed to the baud rate given by the variable BaudRate, modifies it to the set value (see below) and returns an er- ror code according to Tab.

  • Page 28: Function Com_Hvpsu2D_Getbufferstate

    Page: 50/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface data incorrectly received from the device. It also deactivates the handshake lines to clear the communication buffer of the device and to reset the communication speed to the default value of 9600 baud.
  • Page 29 Page: 51/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface COM_HVPSU2D_GetBufferState. The return value is an error code according to Tab. 10. This function can be used to repair a disturbed communication. device does respond properly, function COM_HVPSU2D_DevicePurge should be called repeatedly until it re- turns the value true in the variable Empty.

  • Page 30: Device Control

    Page: 52/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Device Control Function COM_HVPSU2D_GetInterlockEnable int COM_HVPSU2D_GetInterlockEnable (WORD PortNumber, BOOL & ConOut, BOOL & ConBNC); Command: l Response: lOB Saves the interlock-enable flags in the variables ConOut and ConBNC and returns an error code according to Tab. 10.

  • Page 31: Function Com_Hvpsu2D_Getmainstate

    Page: 53/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetMainState int COM_HVPSU2D_GetMainState (WORD PortNumber, WORD & State); Command: M Response: MSSSS Saves the main device status in the variable State and returns an error code according to Tab. 10. The possible values of the variable State are given by the constants COM_HVPSU2D_XXX (see the declaration file COM-HVPSU2D.h).

  • Page 32: Function Com_Hvpsu2D_Gethousekeeping

    Page: 54/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetHousekeeping int COM_HVPSU2D_GetHousekeeping (WORD PortNumber, double & VoltRect, double & Volt5V0, double & Volt3V3, double & TempCPU); Command: H Response: HFFFFDDDDCCCCTTTT Saves the housekeeping data in the variables VoltRect, Volt5V0, Volt3V3, and TempCPU, and returns an error code according to Tab.

  • Page 33: Function Com_Hvpsu2D_Getsensordata

    Page: 55/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetSensorData int COM_HVPSU2D_GetSensorData (WORD PortNumber, double Temperature [COM_HVPSU2D_SEN_COUNT]); Command: T Response: TAAAA..ZZZZ Saves the temperature-sensor data in the array Temperature and returns an error code according to Tab. 10. The return values in the array Temperature are temperatures in ºC measured by the temperature sensors.

  • Page 34: Management Of The Power Supply Units

    Page: 56/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Management of the Power Supply Units Function COM_HVPSU2D_GetPSUState int COM_HVPSU2D_GetPSUState (WORD PortNumber, DWORD & Status); Command: sn Response: snSSSSSS Saves the status bits of the PSU controller in the variable Status and returns an error code according to Tab.
  • Page 35 Page: 57/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Tab. 12. Status bits of the PSU modules. Value Description ST_ILIM_CTRL control of the inrush current limiter ST_LED_CTRL_R red LED color is on ST_LED_CTRL_G green LED color is on ST_LED_CTRL_B blue LED color is on...

  • Page 36: Function Com_Hvpsu2D_Getpsuenable

    Page: 58/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetPSUEnable int COM_HVPSU2D_GetPSUEnable (WORD PortNumber, BOOL & PSU0, BOOL & PSU1); Command: e Response: eBB Saves the state of the enable flags of the PSU modules in the vari- ables PSU0 and PSU1 and returns an error code according to Tab. 10.

  • Page 37: Function Com_Hvpsu2D_Haspsufullrange

    Page: 59/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_HasPSUFullRange int COM_HVPSU2D_HasPSUFullRange (WORD PortNumber, BOOL & PSU0, BOOL & PSU1); Command: r Response: rBB Saves the range switching capability of the PSU modules in the vari- ables PSU0 and PSU1 and returns an error code according to Tab. 10.

  • Page 38: Function Com_Hvpsu2D_Setpsufullrange

    Page: 60/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_SetPSUFullRange int COM_HVPSU2D_SetPSUFullRange (WORD PortNumber, BOOL PSU0, BOOL PSU1); Command: pBB Response: pBB Sets the full-range flags of the PSU modules to the values given by the variables PSU0 and PSU1 and returns an error code according to Tab.

  • Page 39: Function Com_Hvpsu2D_Setpsuoutputvoltage

    Page: 61/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface variable Voltage (VVVVV). The voltage value is in mV, i.e. in order to convert it into a value in V, it has to be divided by 10 Function COM_HVPSU2D_SetPSUOutputVoltage int COM_HVPSU2D_SetPSUOutputVoltage (WORD PortNumber, unsigned PSU, double Voltage);...

  • Page 40: Function Com_Hvpsu2D_Getpsuoutputcurrent

    Page: 62/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The variable PSU is the number of the PSU module. It can be 0 (con- stant declaration file COM_HVPSU2D_PSU_POS COM- HVPSU2D.h) or 1 (constant COM_HVPSU2D_PSU_NEG). The return values in the variables VoltageSet and VoltageLimit are voltages in V.

  • Page 41: Function Com_Hvpsu2D_Setpsuoutputcurrent

    Page: 63/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_SetPSUOutputCurrent int COM_HVPSU2D_SetPSUOutputCurrent (WORD PortNumber, unsigned PSU, double Current); Command: InIIIIII Response: InIIIIII Sets the output current of the PSU module with the number PSU to the value in the variable Current and returns an error code according to Tab.

  • Page 42: Function Com_Hvpsu2D_Getpsudata

    Page: 64/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The return values in the variables CurrentSet and CurrentLimit are currents in A. The latter is the limit of the output current, the value CurrentSet is the current that was previously set by the function COM_HVPSU2D_SetPSUOutputCurrent.

  • Page 43: Function Com_Hvpsu2D_Getpsuhousekeeping

    Page: 65/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface hexadecimal digits variable (IIIIII), Current and 5 hexadecimal digits for the variable VoltDropout (DDDDD). The voltage values are in mV, for the parameter unit conversion, see functions COM_HVPSU2D_GetPSUOutputVoltage COM_HVPSU2D_GetPSUOutputCurrent. Function COM_HVPSU2D_GetPSUHousekeeping int COM_HVPSU2D_GetPSUHousekeeping (WORD PortNumber, unsigned PSU, double &...

  • Page 44: Function Com_Hvpsu2D_Getadchousekeeping

    Page: 66/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetADCHousekeeping int COM_HVPSU2D_GetADCHousekeeping (WORD PortNumber, unsigned PSU, double & VoltAVDD, double & VoltDVDD, double & VoltALDO, double & VoltDLDO , double & VoltRef, double & TempADC); Command: hn Response: hnAAAABBBBCCCCDDDDEEEEFFFF Saves the measured housekeeping values of the analog-to-digital...

  • Page 45: Device Configuration

    Page: 67/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Device Configuration Function COM_HVPSU2D_GetDeviceEnable int COM_HVPSU2D_GetDeviceEnable (WORD PortNumber, BOOL & Enable); Command: E Response: EB Saves the enable state of the device in the variable Enable and re- turns an error code according to Tab. 10.

  • Page 46: Configuration Management

    Page: 68/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Configuration Management Function COM_HVPSU2D_ResetCurrentConfig int COM_HVPSU2D_ResetCurrentConfig (WORD PortNumber); Command: * Response: * Resets the current configuration and returns an error code according to Tab. 10. This function resets all configuration values of the PSU modules.

  • Page 47: Function Com_Hvpsu2D_Loadcurrentconfig

    Page: 69/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface (see declaration file COM_HVPSU2D_MAX_CONFIG-1 COM-HVPSU2D.h). Note that call function overwrites previously COM_HVPSU2D_SaveCurrentConfig saved configuration data without any warning. Any configuration stored in the NVM can be restored, i.e. loaded as the current device configuration by the function COM_HVPSU2D_LoadCurrentConfig.

  • Page 48: Function Com_Hvpsu2D_Getconfigname

    Page: 70/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetConfigName int COM_HVPSU2D_GetConfigName (WORD PortNumber, unsigned ConfigNumber, char Name [COM_HVPSU2D_CONFIG_NAME_SIZE]); Command: ANN Response: ANNS..S Saves the name of the configuration in the NVM with the number given by the variable ConfigNumber in the variable Name and returns an error code according to Tab.

  • Page 49: Function Com_Hvpsu2D_Setconfigname

    Page: 71/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_SetConfigName int COM_HVPSU2D_SetConfigName (WORD PortNumber, unsigned ConfigNumber, const char Name [COM_HVPSU2D_CONFIG_NAME_SIZE]); Command: ANNS..S Response: ANNS..S Sets the name of the configuration in the NVM with the number given by the variable ConfigNumber to the value given by the variable Name and returns an error code according to Tab.

  • Page 50: Function Com_Hvpsu2D_Setconfigflags

    Page: 72/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The value Active determines if the configuration is active (value set) or deleted (value reset). When this flag is flipped by calling the func- tion COM_HVPSU2D_SetConfigFlags, the particular configuration can be deleted or undeleted.

  • Page 51: Function Com_Hvpsu2D_Getconfiglist

    Page: 73/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetConfigList int COM_HVPSU2D_GetConfigList (WORD PortNumber, bool Active [COM_HVPSU2D_MAX_CONFIG], bool Valid [COM_HVPSU2D_MAX_CONFIG]); Command: W Response: WF..F Saves the flags of all configurations in the NVM in the variables Active and Valid, and returns an error code according to Tab. 10.

  • Page 52: Miscellaneous Functions

    Page: 74/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Miscellaneous Functions Function COM_HVPSU2D_GetSWVersion WORD COM_HVPSU2D_GetSWVersion(); Returns the version of the software interface (the dynamic link library COM-HVPSU2D.dll). This function should be used to check whether a software interface with the correct version is being used. The function should be called prior to any other function of the software interface.

  • Page 53: Function Com_Hvpsu2D_Gethwversion

    Page: 75/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetHWVersion int COM_HVPSU2D_GetHWVersion (WORD PortNumber, WORD & Version); Command: v Response: vVVVV Saves the device's hardware version in the variable Version and re- turns an error code according to Tab. 10.

  • Page 54: Function Com_Hvpsu2D_Getfwdate

    Page: 76/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The response to the direct command (V ) contains 4 hexadecimal digits (vvvv) for the variable Version. Function COM_HVPSU2D_GetFWDate int COM_HVPSU2D_GetFWDate (WORD PortNumber, char * DateString); Command: D Response: Ddd..d Saves the device's firmware date in the variable DateString and re- turns an error code according to Tab.

  • Page 55: Function Com_Hvpsu2D_Getproductid

    Page: 77/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Function COM_HVPSU2D_GetProductID int COM_HVPSU2D_GetProductID (WORD PortNumber, char * Identification); Command: P Response: Pii..i Saves the device's product identification in the variable Identifica- tion and returns an error code according to Tab. 10.

  • Page 56: Function Com_Hvpsu2D_Gettotaltime

    Page: 78/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface able Milliseconds into the abovementioned value, i.e. ms, it has to be multiplied by 3.90625, i.e. divided by 256=100h and multiplied by 1000. Function COM_HVPSU2D_GetTotalTime int COM_HVPSU2D_GetTotalTime (WORD PortNumber, DWORD & Uptime, DWORD &...

  • Page 57: Function Com_Hvpsu2D_Restart

    Page: 79/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface The CPU operating frequency is a value stabilized by a frequency locking loop to about 15.7 MHz. The frequency is also used as a time base for the communication interface. The theoretical frequency value equals 15.6672 MHz, which is a multiple of the...

  • Page 58: Error Handling

    Page: 80/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface Error Handling Function COM_HVPSU2D_GetInterfaceState int COM_HVPSU2D_GetInterfaceState (WORD PortNumber); Returns the state of the software interface according to Tab. 10. This function can be used to obtain the last return value of an inter- face function.
  • Page 59 Page: 81/81 User Manual PSU-CTRL-2D, Rev.1-00: Software Interface This function does not have any influence on the communication and can be called at any time. CGC Instruments Tel.: +49 (371) 355 098–55 internet: www.cgc-instruments.com Hübschmannstr. 18 | D–09112 Chemnitz Fax: +49 (371) 355 098–60...

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