iseg NHS Series, Programmer'S Manual

Page 1: ...Programmers guide Last changed on 2020 10 07 iseg SCPI general instruction set applies to HV power supply devices NHS NHR SHR MICC HPS 300 800 W HPS compact 350 W HPS 1 5 kW ...

Page 2: ...n to copy extract parts duplicate for any kind of publication without a written permission of iseg Spezialelektronik GmbH This information has been prepared for assisting operation and maintenance personnel to enable efficient use The information in this manual is subject to change without notice We take no responsibility for any mistake in the document We reserve the right to make changes in the ...

Page 3: ...ty instructions DANGER DANGER Danger indicates a severe injury hazard The non observance of safety instructions marked as Danger will lead to possible injury or death WARNING WARNING Warning indicates an injury hazard The non observance of safety instructions marked as Warning could lead to possible injury or death CAUTION CAUTION Advices marked as Caution describe actions to avoid possible damage...

Page 4: ...uitable safety measures on the basis of his technical training his knowledge and experience as well as his knowledge of the relevant regulations General safety instructions Observe the valid regulations for accident prevention and environmental protection Observe the safety regulations of the country in which the product is used Observe the technical data and environmental conditions specified in ...

Page 5: ... done by qualified personnel only WARNING WARNING Before connecting or disconnecting HV cables or any operation on the HV output or the application the unit has to be switched off and discharge of residual voltage has to be finished Depending on application residual voltages can be present for long time periods CAUTION CAUTION When controlling the high voltage systems with software make sure that ...

Page 6: ... 3 USB interface 17 3 1 4 Windows USB driver installation 18 3 1 5 Linux USB driver installation 19 3 2 Ethernet 21 3 2 1 Ethernet programming example 22 4 Common instruction set 24 5 NHR SHR NHS and MICC 25 5 1 SCPI instruction set 25 5 2 Hardware Options 34 5 2 1 Option VCT 34 6 HPS and Filament devices 35 6 1 1 ARC Management configuration for HPS 1 5 kW 41 7 Output formats for voltage and curr...

Page 7: ...e Event Channel Status 56 8 11 Module Event Channel Mask 56 9 iseg Terminal 57 10 iseg SCPI Control 58 11 ASCII character table 59 12 References 60 13 Manufacturer contact 61 SCPI protocol common instruction set Last changed on 2020 10 07 www iseg hv com 7 61 ...

Page 8: ...ve in common that they support the EDCP Enhanced device communication protocol in combination with the SCPI command set Some devices also support other command sets these are not covered by this manual and can be looked up directly in the specific device s manual SHR is a high precision desktop high voltage power supply with four channels of switchable polarity NHR is a high precision high voltage...

Page 9: ...ded output current Imeas Current Measure the actual measured output current Ilim Current Limit Can be a hardware or a software limit and serves two purposes 1 It limits the upper value of Iset to the given limit value Iset Ilim 2 It generates the Channel Status is Current Limit if Imeas exceeds the limit value the exact threshold value is device dependend Vbounds Voltage bounds a tolerance tube Vs...

Page 10: ...t means Vmeas Vset and Imeas Iset Constant Current The channel operates as constant current source that means Vmeas Vset and Imeas Iset Delayed Trip This is a special mode of Constant Current If this mode is activated and Imeas reaches or exceeds Iset the Channel Status Is Current Trip is generated Depending on the trip configuration the channel may stay in Constant Current or turn off with ramp o...

Page 11: ...sible to clear an event bit if the corresponding status bit is still set The status and event registers are described in detail in section 8 Description of control status event and mask registers 1 5 Hardware options Some devices can be attached with hardware options that provide extra functionality These hardware options can be controlled with additional SCPI commands These commands can only be u...

Page 12: ... have a keyword that ends with the character Example MEAS VOLT 2 1 General Command Syntax Each command is formed by a set of one or more fields Each field is separated from the next by a field separator The first field is always the command keyword the remaining fields and their syntax depend on the command keyword Commands are always executed in the same order in which they are received If an err...

Page 13: ...without quotes Range 0 63 means the values 0 up to 63 both included are possible parameters here Enumeration 125000 250000 means either 125000 or 250000 is a possible parameter here COMMAND HIERARCHY SCPI commands form a hierarchy or a tree starting at the SCPI root which is indicated by a colon A command line is always terminated by the character sequence carriage return and line feed CR LF The f...

Page 14: ...rated from the query with a space MEAS VOLT 3 CR LF Especially to simplify query commands but also usable for order commands multiple channels can be used together with a single command Therefore the channel range 0 3 and the channel enumeration 0 1 3 5 notations exist Both notations can be combined 0 2 5 7 which will operate on the channels 0 1 2 5 6 7 The different answer parts for such a reques...

Page 15: ...tional Optional Optional HPS 19 1 5 kW H101C1 Yes Optional Optional Optional Filament FLM501 Yes Optional Optional Table 3 Overview of available interfaces A concrete description of the different interfaces follows in the next sections Many devices have more interfaces which are not covered by this document For example the CAN interface with EDCP DCP command list is described in the manual CAN_EDC...

Page 16: ...mmediately after the last answer was completely received including CR LF For commands that don t return an answer the simplest thing is to add OPC in EDCP instruction set see chapter 12 References Command sent by Computer Echo and answer sent by HV device VOLT 500 VOLT ON OPC CR LF VOLT 500 VOLT ON OPC CR LF 1 CR LF Table 4 Programming serial interface 3 1 2 RS 232 interface The RS 232 interface i...

Page 17: ...al serial port can be used though For detailed driver installation procedure see the following chapters Device USB connector USB hardware NHR NHS MICC Female USB B at the front panel FTDI FT232R see chapter 12 References EHQ 1 channel Female Mini USB at the front panel HPS 300 800 W Female USB B at the back panel HPS compact 350 W Female USB B at the front panel HPS 1 5 kW Female USB B at the back...

Page 18: ...The file linux cdc acm inf can be downloaded from our homepage http www iseg hv com SUPPORT DOWNLOADS SOFTWARE Tools linux cdc acm inf See chapter 12 References USB CONNECTION TEST To determine if the installation was successful check if the serial USB interface is shown in the Device Manager Start the Device Manager with Windows XP Start Settings Control Panel System Device Manager or Windows 7 S...

Page 19: ...ered for FTDI USB Serial Device 234 816774 ftdi_sio 1 2 1 0 FTDI USB Serial Device converter detected 234 816805 ftdi_sio Detected FT232RL 234 816855 usb 1 2 FTDI USB Serial Device converter now attached to ttyUSB0 234 816872 usbcore registered new interface driver ftdi_sio 234 816876 ftdi_sio v1 4 3 USB FTDI Serial Converters Driver CDC ACM USB DRIVER FOR SHR DEVICES The driver is already include...

Page 20: ...B or serial device the following settings are needed Device dev ttyUSB0 or other interface according to dmesg output Baud rate 9600 Data bits 8 Stop bits 1 Parity None Handshake None Line end CR LF Now the serial interface can be opened by Open device to test the communication Figure 2 Linux Terminal CuteCom SCPI protocol common instruction set Last changed on 2020 10 07 www iseg hv com 20 61 ...

Page 21: ...f it shall be connected to a PC directly without switch a crossover cable has to be used The connection to the device can be tested with the ping command Start Programs Accessories Command C ping 192 168 16 221 Ping will done for 192 168 16 221 with 32 bytes data Answer from 192 168 16 221 bytes 32 time 4ms TTL 128 Answer from 192 168 16 221 bytes 32 time 4ms TTL 128 Answer from 192 168 16 221 byt...

Page 22: ...nd is ASCII coded see chapter 11 ASCII character table in the data field of the TCP packet The answer is also ASCII coded see chapter 11 ASCII character table pushed back to the PC in step 5 Here it is possible that longer answers are transmitted in multiple TCP packets Step 6 confirms the reception of the packet and sends a FIN to terminate the connection Step 7 and 8 are the connection terminati...

Page 23: ... S_un_b s_b2 168 adjust to your sockaddr_in sin_addr S_un S_un_b s_b3 16 environment sockaddr_in sin_addr S_un S_un_b s_b4 221 connect to device three way handshake connect sock SOCKADDR sockaddr_in sizeof SOCKADDR_IN send command to device send sock cmd int strlen cmd 0 read answer from device until CR LF is found for char buf 256 int length recv sock buf sizeof buf 0 if length 0 break buf length...

Page 24: ...further command sets refer to the devices manual for them Example INSTR EDCP INSTR EDCP Switch the device to the EDCP command set Only for devices that support other command sets beside EDCP For HPS and EHQ with other command sets refer to the devices manual This setting is permanent Example INSTR EDCP LLO Local Lockout Front panel buttons and rotary encoders are disabled The device can only be co...

Page 25: ...the configured ramp speed Example VOLT OFF 1 EMCY OFF Channel Shut down the channel High Voltage without ramp The channel stays in Emergency Off until the command EMCY CLR is given Example VOLT EMCY OFF 2 EMCY CLR Channel Clear the channel from state emergency off The channel goes to state off Example VOLT EMCY CLR 2 BOUnds V Channel Set the channel voltage bounds Vbounds in Volt Example VOLT BOUN...

Page 26: ...l Inhibit for the channel occurs Action 0 no action status flag External Inhibit will be set 1 turn off the channel with ramp 2 shut down the channel without ramp 3 shut down the whole module without ramp 4 disable the External Inhibit function Example CONF INHP ACTION 3 0 ACTion Channel OUTPut 1 Configures the output mode and polarity MODE 1 2 3 Channel Set the channel output mode Only values tha...

Page 27: ...m Example READ CURR LIM 1 5 00000E 3A NOMinal Channel Query the channel current nominal answer is absolute value Example READ CURR NOM 1 6 00000E 3A MODE Channel 1 Query the configured channel current mode Example READ CURR MODE 1 2 00000E 3A LIST Channel 1 Query the available channel current modes as list which corresponds to the request CONF OUTP MODE LIST Example READ CURR MODE LIST 1 6 0E 3A 4...

Page 28: ...olt second Example CONF RAMP VOLT UP 250 2 UP Channel 1 Query the channel voltage ramp up speed in Volt second Example CONF RAMP VOLT UP 2 0 25000E3V s DOwn RampSpeed V s Channel 1 Set the channel voltage ramp down speed in Volt second Example CONF RAMP VOLT DOWN 125 2 DOwn Channel 1 Query the channel voltage ramp down speed in Volt second Example CONF RAMP VOLT DOWN 2 0 12500E3V s CURRent RampSpe...

Page 29: ...CONF EVENT CHANMASK 255 CHANMASK Query the Module Event Channel Mask register 8 11 Example CONF EVENT CHANMASK 255 CAN ADDRess 0 63 Set the modules CAN bus address 0 63 Can only be set in configuration mode Example CONF CAN ADDR 23 ADDRess Query the modules CAN bus address Example CONF CAN ADDR 23 BITrate 125000 250000 Set the CAN bus bit rate to 125 kBit s or 250 kBit s Can only be set in configu...

Page 30: ...annel Status register 8 10 Example READ MODULE EVENT CHANSTAT 7 CHANMASK Query the Module Event Channel Mask register 8 11 Example READ MODULE EVENT CHANMASK 0 SUPply Query the module supplies P24V Query the module supply voltage 24 Volt Example READ MODULE SUPPLY P24V 24 0V N24V Query the module supply voltage 24 Volt Example READ MODULE SUPPLY N24V 23 9V P5V Query the module supply voltage 5 Vol...

Page 31: ...ce serial number must be given For MICC this also switches the device in a mode where user calibration is possible Example SYSTEM USER CONFIG 1234567 CONFig 0 Set the device back to normal mode Example SYSTEM USER CONFIG 0 CONFig Returns 1 in configuration mode otherwise 0 Example SYSTEM USER CONFIG 1 SAVE 2 SHR Saves the changed output mode or polarity to icsConfig xml Example SYSTEM USER CONFIG ...

Page 32: ...nfirmation Answer HV_OK or HV_NOT_OK Example CONF HVMICC HV_OK HVMICC HV_NOT_OK The HV configuration of the MICC system is not confirmed It is not possible to switch on any HV channel The system can be set to configuration mode to change the nominal values of the installed HV modules Example CONF HVMICC HV_NOT_OK HV_OK The MICC system is properly configured and the configuration is confirmed by th...

Page 33: ...000 0 NOMinal Channel Returns the channels hardware nominal voltage Vnom hw in Volt Example SYS USER VOLT NOMINAL 0 4000V LIMit Limit Channel Configures a software limit for the channel in Volt This limit must be in the range 0 Vnom hw with a default of Vnom hw In normal operation this value appears as the nominal voltage Vnom Example SYS USER VOLT LIMIT 3500 0 LIMit Channel Returns the channels s...

Page 34: ...AL Number Channel Configures the serial number of the module assigned to Channel This is mainly thought for user information Example SYS USER SERIAL 2345678 0 SERIAL Channel Returns the serial number of the module assigned to Channel Example SYS USER SERIAL 0 2345678 IDENTification Channel Returns the Chip ID of the module assigned to Channel Example SYS USER IDENT 0 123456ABCDEF CALIB WRITE Chann...

Page 35: ...a new VCT coefficient in Volt Kelvin Example CONF VCT COEFF 1 234 0 COEFficient Channel Query the VCT coefficient in Volt Kelvin Example CONF VCT COEFF 0 1 234V K READ CHANnel Reads the temperature of the channels external temperature sensor in degree Celsius Example READ CHAN TEMPERATURE 0 25 9C TEMPerature Channel SCPI protocol common instruction set Last changed on 2020 10 07 www iseg hv com 35...

Page 36: ... EMCY CLR Example VOLT EMCY OFF EMCY CLR Clear the Shut channel High Voltage emergency off The channel goes to state off The Event Emergency Off must be cleared separately e g with CLS Example VOLT EMCY CLR CURRent Current A Set the channel current set Iset in Ampere Example CURR 0 9 LIMit Current A Set the channel current limit Ilim in Ampere Example CURR LIM 1 5 Note This limit should only be ch...

Page 37: ...l disable 0 Example CONF KILL 1 KILL Query the current value for the Kill enable function Example CONF KILL 0 AVERage 1 16 64 256 Set the number of digital filter averaging steps Example CONF AVER 16 AVERage Query the digital filter averaging steps Example CONF AVER 16 ETHernet 4 Configure the Ethernet settings for HPS 300 800 W Note Devices with XPort are configured in the XPort web interface ADD...

Page 38: ...000 250000 1 Set the devices CAN bus bitrate Example CONF CAN BIT 250000 INTERface LOCAL 1 Turns off the high voltage and switches from digital interface operation to local operation For devices without front panel controls the device switches to analog interface AIO Example CONF INTERFACE LOCAL MODE 1 Returns 0 default if all interface commands turn the device into remote mode or 1 if only set co...

Page 39: ...f ARCs Example CONF ARC WAIT 0 07s WAIT Time s 2 Set the wait time before turning the high voltage on again after exceeding the configured number of ARCs The allowed range of wait time is device specific Example CONF ARC WAIT 0 05 RAMP 1 Query the configured ARC ramp speed that is used to turn on the high voltage after exceeding the configured number of ARCs Example CONF ARC RAMP 2 00000E6V s RAMP...

Page 40: ...URRent Query the current ramp speed in Ampere second Example READ RAMP CURR 0 50000A s MODule STATus Query the Module Status register 8 6 Example READ MOD STAT 43210 EVent STATus Query the Module Event Status register 8 7 Example READ MOD EVENT STAT 54321 MASK Query the Module Event Mask register 8 8 Example READ MOD EVENT MASK 65432 SUPply Query the module supply state 1 good 0 not good Example R...

Page 41: ...gement to a full ARC recovery of 200 ms For more information about the ARC management refer to the devices hardware manual The ARC management settings are permanently stored in the processors internal flash and are therefore restored after power on Therefore these commands only need to be sent once CONF ARC CONT 1 Activate the ARC management CONF ARC NUM 10 Allow up to 10 ARCs CONF ARC TIME 1 duri...

Page 42: ...ts for voltage values Inominal Output format for current values 10 µA Inom 100 µA 12 3456E 6A 100 µA Inom 1 mA 123 456E 6A 1 mA Inom 10 mA 1 23456E 3A 10 mA Inom 100 mA 12 3456E 3A 100 mA Inom 1 A 123 456E 3A 1 A Inom 10 A 1 23456EA 10 A Inom 100 A 12 3456EA Table 12 Output formats for current values For high precision NHR and SHR N04C2 or N06C2 there are some differences The voltage format has on...

Page 43: ...o 1000 Volt for channel 0 and 2 to 4 VOLT 1000V 0 2 4 Query voltage set value of channel 0 and 2 to 4 READ VOLT 0 2 4 1 00000E3V 1 00000E3V 1 00000E3V 1 00000E3V Set HV on for channel 0 and 2 to 4 VOLT ON 0 2 4 7 1 3 Commands for NHR and SHR Query the available output modes CONF OUTP MODE LIST 0 1 2 3 Query the available output polarities CONF OUTP POL LIST 0 p n Query the voltage and current valu...

Page 44: ...Reserved Reserved Reserved Bit23 Bit22 1 Bit21 1 Bit20 1 Bit19 1 Bit18 1 Bit17 1 Bit16 1 Reserved Is Voltage Bound Lower Is Voltage Bound Upper Is Voltage Ramp Down Is Voltage Ramp Up Is Current Ramp Down Is Current Ramp Up Is Current Ramp Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Is Voltage Limit Is Current Limit Is Current Trip Is External Inhibit Is Voltage Bounds Is Current Bounds Reserv...

Page 45: ... Enable or Delayed Trip Is External Inhibit An External Inhibit is active and prevents turning on the channel Is Voltage Bounds The measured voltage is out of the programmed bounds Vbounds Is Current Bounds The measured current is out of the programmed bounds Ibounds Is Low Current Range The current measurement value originates from the Low Current Current Range for devices with two current ranges...

Page 46: ...f Event End Of Voltage Ramp Event On To Off Event Input Error Reserved Reserved Notes 1 NHR and SHR only The Channel Event Status contains the captured status An event bit is set if the corresponding Channel Status bit is 1 or is changing to 1 Different to the status bit an event bit isn t automatically reset A reset has to be done by the user by writing an 1 to this event bit All channel events c...

Page 47: ...nt limit Ilim has been or is exceeded Event Current Trip Yes Trip is set when Vlim or Ilim or Iset has been exceeded in Kill Enable or Iset has been exceeded in Delayed Trip Event External Inhibit Yes External Inhibit has been or is active Event Voltage Bounds Measured voltage has been or is out of bounds Event Current Bounds Measured current has been or is out of bounds Event Constant Voltage Con...

Page 48: ...12 Bit11 Bit10 Bit09 Bit08 Mask Event Voltage Limit Mask Event Current Limit Mask Event Trip Mask Event External Inhibit Mask Event Voltage Bounds Mask Event Current Bounds Reserved Reserved Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00 Mask Event Constant Voltage Mask Event Constant Current Mask Event Emergency Off Mask Event End Of Ramp Mask Event On To Off Mask Event Input Error Reserved Rese...

Page 49: ...mit Mask the Event Voltage Limit Mask Event Current Limit Mask the Event Current Limit Mask Event Trip Mask the Event Trip Mask Event External Inhibit Mask the Event External Inhibit Mask Event Voltage Bounds Mask the Event Voltage Bounds Mask Event Current Bounds Mask the Event Current Bounds Mask Event Constant Voltage Mask the Event Constant Voltage Mask Event Constant Current Mask the Event Co...

Page 50: ...Reserved Reserved Reserved Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00 Reserved Reserved Set Emer gency Off Reserved Set On Reserved Reserved Reserved The Channel Control register contains the control information of the channel There is no direct write access to this register by SCPI instead the commands VOLT ON OFF and VOLT EMCY OFF CLR are used to control the channel Control Bit Description ...

Page 51: ...15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Is Kill Enable Is Tempe rature Good Is Supply Good Is Module Good Is Event Active Is Safety Loop Good Is No Ramp Is No Sum Error Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00 Reserved Is Input Error Reserved Is Service Is High Voltage On Reserved Reserved Is Fine Adjustment Notes 1 SHR only The Module Status register describes the actual status Depend...

Page 52: ...Channel Mask bit is set Is Safety Loop Good Safety Loop is closed If the safety loop is opened all channels are shut down without ramp Is No Ramp All channels are stable no ramp is running Is No Sum Error All channels are in good condition that means the condition Is Voltage Limit OR Is Current Limit OR Is Current Trip OR Is External Inhibit OR Is Voltage Bounds OR Is Current Bounds OR Is Arc Erro...

Page 53: ...t bit All channel events can be cleared by the CONF EV CLEAR command With the command CLS all module and channel event registers are cleared at once Some event bits also perform a blocking function which means if this Bit and it s corresponding event mask bit is set then The voltage set value can not be increased while the high voltage is on After the high voltage is turned off it cannot be turned...

Page 54: ... Bit05 Bit04 Bit03 Bit02 Bit01 Bit00 Reserved Mask Event Input Error Reserved Mask Event Service Reserved Reserved Reserved Reserved The event mask provides a mean to propagate a specific channel event to the global event register They also block turning on or increasing the high voltage for some event bits See section 8 7 Module Event Status for more information Mask Bit Description Mask Event Te...

Page 55: ...ved Notes 1 SHR Only The Module Control register contains the control information of the module There is no direct write access to this register by SCPI Instead the commands CONF ADJust CONF KILL and CLS can be used Bit Description when Bit is set to 1 Disable Voltage Ramp Speed Limit If set to one disables ramp speed limitation caused by Kill Enable or Delayed Trip Set Kill Enable Kill Enable is ...

Page 56: ...H29 Mask CH28 Mask CH27 Mask CH26 Mask CH25 Mask CH24 Bit23 Bit22 Bit21 Bit20 Bit19 Bit18 Bit17 Bit16 Mask CH23 Mask CH22 Mask CH21 Mask CH20 Mask CH19 Mask CH18 Mask CH17 Mask CH16 Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Mask CH15 Mask CH14 Mask CH13 Mask CH12 Mask CH11 Mask CH10 Mask CH9 Mask CH8 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00 Mask CH7 Mask CH6 Mask CH5 Mask CH4 Mask CH3...

Page 57: ...1 RS 232 USB in the Interface List and select the COM Port you connected your iseg device to With a click on Init the serial port is opened and you can send commands to your device by clicking the Query button or simple pushing the Enter key The answer is shown in the output window For detailed command set descriptions please see the documentation for the specific device The following command is u...

Page 58: ... are displayed with the text entries of the menu bar The control of iseg USB devices requires a driver installation see 3 1 4Windows USB driver installation The connection will be established by means of the button Connect and a continuous request of the data points is started https iseg hv com download SOFTWARE isegSCPIcontrol current isegScpiControlSetup win32 x x xx x exe SCPI protocol common i...

Page 59: ...09 m 0x0E 14 SO 0x2E 46 0x4E 78 N 0x6E 110 n 0x0F 15 SI 0x2F 47 0x4F 79 O 0x6F 111 o 0x10 16 DLE 0x30 48 0 0x50 80 P 0x70 112 p 0x11 17 DC1 0x31 49 1 0x51 81 Q 0x71 113 q 0x12 18 DC2 0x32 50 2 0x52 82 R 0x72 114 r 0x13 19 DC3 0x33 51 3 0x53 83 S 0x73 115 s 0x14 20 DC4 0x34 52 4 0x54 84 T 0x74 116 t 0x15 21 NAK 0x35 53 5 0x55 85 U 0x75 117 u 0x16 22 SYN 0x36 54 6 0x56 86 V 0x76 118 v 0x17 23 ETB 0x...

Page 60: ...nload dir SOFTWARE Tools https developer ridgerun com wiki index php How_to_use_USB_CDC_ACM_and_MS_composite_Linux_gadget_driver The Wireshark network analyzer http www wireshark org CuteCom http cutecom sourceforge net Microsoft Visual C 6 0 https www microsoft com iseg Micc Config https iseg hv com download dir SOFTWARE isegMICCconfig Win isegTerminal https iseg hv com download dir SOFTWARE iseg...

Page 61: ...tronik GmbH Bautzner Landstr 23 01454 Radeberg OT Rossendorf GERMANY FON 49 351 26996 0 FAX 49 351 26996 21 www iseg hv com info iseg hv de sales iseg hv de SCPI protocol common instruction set Last changed on 2020 10 07 www iseg hv com 61 61 ...