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VM3618 - VTI Instruments

1. Type IEEE488 2 Common Command Command Syntax TRG RO oO PI Be OC None RST Value N A Query Syntax None Command Only Query Parameters N A Query Response N A Description The Trigger command causes a trigger event to occur Examples Command Query Response Description TRG Related Commands TRIGger SEQuence IMMediate VM3618 Command Dictionary 69 VXI Technology Inc TST Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Examples Related Commands Starts and reports a self test procedure IEEE488 2 Common Command None Query Only N A N A TST None Numeric ASCII value from 0 to 255 The Self Test query causes the VM3618 to run its self test procedures and report on the results The following tests are performed 1 Non volatile memory test 2 Timer test 3 Data path test 4 Trigger test The TST query returns a numeric ASCII value which has the following meaning Bit 0 Non volatile memory failed Bit 1 Timer failed Bit 2 Data path failed Bit 3 Trigger failed Bit 4 Unused Bit 5 Unused Bit 6 Unused Bit 7 Unused A bit value of 1 in any location indicates a failure while a bit value of 0 indicates the test passed An overall value of 0 indicates all tests passed Command Query Response Descri
2. Technology VM3618 ISOLATED DIGITAL TO ANALOG CONVERTER USER S MANUAL 82 0028 000 Release December 1 2003 VXI Technology Inc 2031 Main Street Irvine CA 92614 6509 949 955 1894 www vxitech com TABLE OF CONTENTS INTRODUCTION Certification ss Warranty sss Limitation of Warranty Restricted Rights Legend Declaration of Conformity sieeve exec itte aee e OE DAR esas ee nek Ree e aae ed ertet te ee e ERU General Safety InstrUCtlons x dee Ge ee SA UI Ie IEEE ie desde e E es Terms and Symbols ies e bee tied eee iii ee ie ite dette eie eed MED CNET HH Support EE SECTION 1 c eeeeeeeeeeeeenn Introduction eooesssseeeisseeeesseee eet e EE IDES e e SECTION 2 seeseesreeseeseererereeeen Preparation for Use 5 2 ce eec eme ste tee e e d eee ee dee e e dens Installations eege ease tam ee te ete i Seq Calculating System Power and Cooling Requirements Setting the Chassis Backplane Jumpers Setting the Logical Address Front Panel Interface Wiring sess Mating Connectors rieren aa nne SECTION eee Programming 4 eher tete e ete ette ete Wath e e e te SE Introduction eee ciet eee aevi teta qiue e ED aves Notation cccceecceesseceeeees SCPI Command Examples Calibration Count Calibration Gain Calibration Secure Code Calibration EE
3. Examples Command Query Response Description SYST VERS 1996 0 Related Commands None VM3618 Command Dictionary 105 VXI Technology Inc 106 VM3618 Command Dictionary www vxitech com SECTION 5 THEORY OF OPERATION INTRODUCTION VMIP BUS The VM3618 instrumentation module provides eight independent digital to analog converter DAC channels with 16 bits of resolution Each channel consists of an independent DAC combined with its own instrumentation amplifier see Figure 5 1 below e DATA BUFFER HI LO BYTE a BYTE ENABLES DATA 0 15 gt CONTROL AND UPDATE HANDSHAKING UPDATE p gt CONTROL ELECTS TIMINGAND DAC CONTROL GAIN mm TRIGGER Ve FPGA CALDATA TRIGGERS MUX ach ESCORT g CONTROL Gay i F EXT TRIG OFFSET ACD1 4 M e ENABLE REFERENCE DAC ENABLE DAC ENABLES DE DERS TO DACOUT FRONT PANEL FFSET FIGURE 5 1 VM3618 FUNCTIONAL BLOCK DIAGRAM Each channel has a separate 512 value scan list that is user definable This list may be started from and stopped at any one of the 512 locations For further capabilities the VM3618 scan lists can be looped to output repetitive values VM3618 Theory of Operation 107 VXI Technology Inc The output data is converted when a trigger event occurs from one of the three following m
4. Query Response 1 512 Description The Scan Limit command specifies a position in the 512 element scan list array where the interrupt routine loading the DACs should either stop or loop back to zero Examples Command Query Response Description SCAN LIMIT 2 256 SCAN LIMIT 2 Related Commands SCAN MODE lt mode gt lt channel_list gt SCAN TABle lt channel gt LOCation lt number gt lt voltage gt VM3618 Command Dictionary 87 VXI Technology Inc SCAN TABLe Purpose Enter a voltage list on a per channel basis Type Instrument specific SCPI Command Syntax SCAN TABLe channel value bat RTE ENNESCH lt channel gt 1 2 3 4 5 6 7 8 value list 1 512 separated by commas RST Value 0 Query Syntax SCAN TABLe channel count start Query Parameters lt channel gt 1 2 3 4 5 6 7 8 lt count gt 1 512 start 1 512 Query Response A list of values delimited by commas according to the lt count gt and lt start gt parameters If count and start are not specified the entire 512 element scan list will be returned Description The Scan Table command loads values into the scan list of a specified channel These values are then loaded to the DAC from the interrupt routine This operation is dependent upon the scan mode and the scan limit Each channel has its own independent mode limit scan list array and pointer in the
5. 1 2 3 4 5 6 7 8 RST Value lt mode gt OFF Query Syntax SCAN lt channel gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response 0 1 LOOP Description The Scan command enables or disables the scan list function for a specified channel For each channel that is enabled the interrupt routine will load a voltage from its respective scan list arrays at the current array position to the DAC and auto increment the scan list array pointer If the array pointer equals the limit then the scan function for that channel will stop unless the mode of that channel is set to LOOP LOOP mode means the scan function will reset the array pointer to 0 and continue Note Legal transitions of SCAN are OFF to ON ON to OFF OFF to LOOP LOOP to OFF Illegal transitions of SCAN are ON to LOOP LOOP to ON Examples Command Query Response Description SCAN ON 1 4 SCAN 2 Related Commands SCAN LIMit lt channel gt lt count gt SCAN TABle lt channel gt LOCation lt number gt lt voltage gt 86 VM3618 Command Dictionary www vxitech com SCAN LIMit Purpose Set the scan loop back limit Type Instrument specific SCPI Command Syntax SCAN LIMit lt channel gt lt count gt ROUTE ENNESCH lt channel gt 1 2 3 4 5 6 7 8 count 1 512 RST Value 512 Query Syntax SCAN LIMit channel Query Parameters channel 2 1 2 3 4 5 6 7 8
6. FIGURE 5 3 REFERENCE AND CALIBRATION FUNCTIONAL DIAGRAM REFERENCE AND CALIBRATION The calibration circuitry contains a precision voltage reference calibration DACs and an instrumentation amplifier The calibration DACs are group to four channels with each channel having its own unique instrumentation amplifier Channels 0 3 share one calibration DAC Channels 4 7 share another and so on All channels share the precision voltage reference The calibration logic resides in the interface and control FPGA This logic will receive the parallel calibration data from the VMIP bus convert the parallel data to serial generate the appropriate clock and load control signals to the calibration DACs see Figure 5 3 The calibration DACs output signal GAIN where is a specific channel is routed to the precision DAC as the reference for the conversion cycles The calibration DACs output signal OFFSET is routed to the precision DAC instrumentation amplifier for feedback correction of errors in the amplifier 110 VM3618 Theory of Operation www vxitech com L logical address i aceite ee es 17 M MEMory SETup dinner estote ei euni 57 78 EE WEE 20 N non volatile memory sss 13 107 0 OUTPut TRIGger SLOPe eere A OUTPut TRIGger TTL Trig m amplifier cee Qus dide tds 106 107 109 QU Pu EEIE LAL B P backplane Backplane C Calibration oa et 13 1
7. 20 Configures the output current level for Channels 1 through 4 to 20 mA Configures the operating range for Channels 1 and 2 to 20 mA Configures the output current level for Channel 1 to 10 1 mA Returns the output current level for Channel 2 as 20 mA 36 VM3618 Programming www vxitech com SOURCE DATA The Source Data command is used to set the output voltage current level for the specified channels using the 16 bit value that is the equivalent representation of the voltage current to be configured SOURce DATA lt value gt lt channel_list gt Where lt value gt specifies the voltage current value level as a 16 bit value to be set up for the specified channels Where channel list specifies the channels for which the output voltage current level must be configured For more details on the syntax of the channel list see Section 4 EXAMPLES SOUR DATA 32767 Q 1 RANG 16V 2 SOUR DATA 32768 2 SOUR DATA 2 32768 Sets the output level for Channel 1 Configures the operating range for Channel 2 as 16 V Configures the voltage level for Channel 2 as 32768 which corresponds to 16 V on the 16 V range Returns the voltage level for Channel 2 VM3618 Programming 37 SOURCE SETUP VXI Technology Inc The Source Setup command loads each specified DAC with the value from the specified location in its respective scan list SOURce SETup index chan
8. Query Response lt slope gt POS or NEG Description The Output Trigger Slope command sets the polarity of the output trigger pulse For example if the SLOPe is set for POSitive the device will generate a positive going pulse whenever a trigger event occurs The line is held statically low when there is no trigger event The negative pulse is the default condition Examples Command Query Response Description OUTP TRIG SLOP POS Selects a positive polarity for the output trigger pulse OUTP TRIG SLOP POS OUTP TRIG SLOP NEG Selects a negative polarity for the output trigger pulse OUTP TRIG SLOP NEG Related Commands OUTPut TRIGger TTLTrig OUTPut TTLTrig STATe 80 VM3618 Command Dictionary www vxitech com OUTPut TRIGger TTLTrig Purpose Selects which VXIbus TTL trigger line will output a trigger pulse Type Setting Command Syntax OUTPut TRIGger TTLTrig lt n gt OTTO ER ENNESCH n 0 1 2 3 4 5 6 7 RST Value TTLTO Query Syntax OUTPut TRIGger TTL Trig Query Parameters None Query Response xn 0 1 2 3 4 5 6 7 Description The Output Trigger command selects which VXIbus TTL trigger line will output a trigger pulse when the output is enabled Examples Command Query Response Description OUTP TRIG TTLT 1 Selects TTL trigger 1 as output OUTP TRIG TTLT 1 Related Commands OUTPut TTLTrig STATe OUTPut TRIGger SLOPe
9. VM3618 Command Dictionary 81 VXI Technology Inc OUTPut TTLTrig STATe Purpose Enables or disables an output trigger pulse to the TTL trigger lines Type Setting Command Syntax OUTPut TTLTrig STATe lt state gt OMe Cw NEIES SC lt State gt ON OFF 1 0 RST Value 0 or OFF Query Syntax OUTPut TTLTrig STATe Query Parameters None Query Response state 0 1 Description The Output TTL Trigger State command enables or disables an output trigger pulse onto the VXIbus backplane TTL trigger lines ON would enable the driving while an OFF would disable it Examples Command Query Response Description OUTP TTLT ON Enables the TTL trigger bus outputs OUTP TTLT ON Related Commands OUTPut TRIGger TTLTrig OUTPut TRIGger SLOPe 82 VM3618 Command Dictionary www vxitech com RANGe Purpose Set a range of operation Type Instrument specific SCPI Command Syntax RANGe lt range gt lt channel_list gt Command Parameter lt range gt 10V 16V 20V 32V 20mA channel list 1 2 3 4 5 6 7 8 Reset Value RST sets all channels to the 16V range Query Syntax RANGe lt channel gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response 10V 16V 20V 32V 20mA Description Four voltage range settings are available on the VM3618 two bipolar 10 V 16 V and two uni
10. 10 4 000244 SCAN TABL 1 1 2 3 4 5 SCAN TABLI LOC 6 4 SCAN TABLI LOC 6 4 000244 SCAN TABL1 LOC 3 2 999878 Configures the value in the scan list of Channel 1 at the index 10 as 4 Returns the value from the scan list of Channel 1 at index 10 Configures the scan list for Channel 1 Configures the value in the scan list for Channel 1 at index 6 as 4 Returns the value from the scan list of Channel 1 at index 6 Returns the value from the scan list of Channel 1 at index 3 VM3618 Programming 35 SOURCE CURRENT LEVEL VXI Technology Inc The Source Current Level command sets the output current level of the specified channels This command can be used for only those channels that are operating on the current range If this command is used on channels operating on the voltage range an error is generated SOURce CURRent LEVel value channel list Where value specifies a value in the range 20 to 19 998779 which specifies the output current level that is to be set for the specified channels Where channel list specifies the channels for which the output current level is to be configured It must be ensured that the channels specified in this list are operating on the current range otherwise an error will be generated For more details on the syntax of the channel list see Section 4 EXAMPLES SOUR CURR LEV 20 1 4 RANG 20mA Q 1 2 SOUR CURR LEV 10 1 Q 1 SOUR CURR LEV 2
11. 255 Description The Event Status Register query queries and clears the contents of the Standard Event Status Register This register is used in conjunction with the ESE register to generate the ESB Event Status Bit in the Status Byte The layout of the ESR is Bit 0 Operation Complete Bit 1 Request Control not used in the VM3618 always 0 Bit 2 Query Error Bit 3 Device Dependent Error not used in the VM3618 always 0 Bit 4 Execution Error Bit 5 Command Error Bit 6 User Request not used in the VM3618 always 0 Bit 7 Power On The Operation Complete bit is set by the VM3618 when it receives an OPC command The Query Error bit is set when data is over written in the output queue This could occur if one query is followed by another without reading the data from the first query The Execution Error bit is set when an execution error is detected Errors ranging from 200 to 299 are execution errors The Command Error bit is set when a command error is detected Errors ranging from 100 to 199 are command errors The Power On bit is set when the module is first powered on or after it receives a reset via the VXI Control Register Once the bit is cleared by executing the ESR command it will remain cleared Examples Command Query Response Description 4 ESR Related Commands ESE VM3618 Command Dictionary 63 VXI Technology Inc IDN Purpose Query the module for its ident
12. 26 VM3618 Programming www vxitech com CALIBRATION STORE The Calibration Store command stores the current calibration constants into the non volatile memory CALibration STORe There are no parameters for this command EXAMPLES CAL STOR Stores the current calibration constants into the non volatile memory It must be ensured that the calibration security has been disabled before this command can be executed CAL SEC STAT OFF 150LIVE Disabling the calibration security CAL2 GAIN 0 785500 Programming Channel 2 s gain constant CAL1 ZERO 220 Programming Channel 1 s offset constant CAL STOR Storing the new calibration constants into the non volatile memory CAL SEC STAT ON Enabling the calibration security VM3618 Programming 27 CALIBRATION ZERO VXI Technology Inc The Calibration Zero command is used to set the calibration constant for the selected channel s offset and its effect is immediate CALibration channel ZERO value Where channel specifies the channel whose calibration constant is to be programmed Where value is the offset constant that is to be programmed for the specified channel EXAMPLES CAL1 ZERO 240 CAL SEC STAT OFF 150LIVE CAL1 ZERO 200 CAL STORE CAL SEC STAT ON CAL1 ZERO 200 Programming Channel I s offset constant Disabling the calibration security Programming Channel I s offset constant Storing the new constant value into the non volatile m
13. OPEN 2 8 ROUT CLOS 2 0 Connects the outputs of Channels 1 through 6 to their front panel connectors Returns whether the output of Channel 1 is connected to its front panel connector or not Disconnecting the outputs of Channels 2 through amp from their front panel connectors Returns whether the output of Channel 2 is connected to its front panel connector or not 30 VM3618 Programming www vxitech com ROUTE OPEN The Route Open command is used to disconnect one or more channel outputs from their front panel connectors ROUTe OPEN channel list Where channel list specifies the channels whose outputs are to be disconnected from their respective front panel connectors For more details on the syntax of the channel list see Section 4 EXAMPLES ROUT OPEN Q 1 8 ROUT OPEN 2 1 ROUT CLOS 1 4 ROUT OPEN 1 0 Disconnects the outputs of Channels 1 through 8 from their front panel connectors Returns whether the output of Channel 2 is disconnected from its front panel connector or not Connects the outputs of Channels 1 through 4 to their front panel connectors Returns whether the output of Channel 1 is disconnected from its front panel connector or not VM3618 Programming 31 SCAN VXI Technology Inc The Scan command enables or disables the operation of the scan list for the specified channels SCAN mode channel list Where mode specifies the sc
14. Parameters None Query Response Numeric ASCII value from 0 to 32767 Description The Operation Status Enable Register is included for SCPI The register layout is as follows Bit 0 Calibrating not used on the VM3618 Bit 1 Setting not used on the VM3618 Bit 2 Ranging not used on the VM3618 Bit 3 Sweeping not used on the VM3618 Bit 4 Measuring not used on the VM3618 Bit 5 Waiting for trigger not used on the VM3618 Bit 6 Waiting for arm not used on the VM3618 Bit 7 Correcting not used on the VM3618 Examples Command Que Response Description STAT OPER ENAB 0 STAT OPER ENAB Related Commands 98 VM3618 Command Dictionary www vxitech com STATus OPERation EVENtP Purpose Query the Operation Status Event Register Type Required SCPI command Command Syntax None Query Only ROT IER EEGA N A RST Value N A Query Syntax STATus OPERation EVENt Query Parameters None Query Response 0 Description The Status Operation Event Register query is included for SCPI compliance The register layout is as follows Bit 0 Calibrating not used on the VM3618 Bit 1 Settling not used on the VM3618 Bit 2 Ranging not used on the VM3618 Bit 3 Sweeping not used on the VM3618 Bit 4 Measuring not used on the VM3618 Bit 5 Waiting for trigger not used on the VM3618 Bit 6 Waiting for arm not used on the VM361
15. SOURCE VOL Tage LEVel ess tiic rec Re Re e e e HE ee E e dett 92 SOURCE E Ota Ee e ent castes ig dart e APA ate E eb aen peep eee PDA ine ES 93 TRIGger SEQuence IMMediate tet ee eee e d eee eR UE edes TQ edet deu accents 94 TRIGeer SEQ uence SLOPES 5 erento i tre octo ci eue vice ui ee ctn eo ee RES oe sere re eve 95 TRIGeer SEQ ence SOURGS reete toe eate ee ee tutte e e cove eae Leto to ect ege 96 Instrument Specific Commands 5 nce nece ees eee teret fe eee ee Re e t a se 97 STATus OPERation CONDition aar aa a a aa aa enne nnne nn ener entren rne n rr en ener en nnne 97 STATus OPERation ENABle e ne ieee enne eren i nennen e aaa rene enne nnne 98 KR KEE RT MEET E EA EC RE 99 STA TuS PRES t ee ee TRE e fei eet ger RE 100 STATus QUEStionable CONDition 2 rrr tete o i ee Pe Ye E E ere PER Red 101 STATus QUEStionable ENABle esses eene eere ennt een nennen rennen entes eerie tes enne e trn 102 STATus QUEStionable EVENt esses eene eere eene nnne en then entrent rentre etre r rns e nennen 103 SYS FEN audito dM 104 SYS Lem VERSIO ui Ri SEN S AR tite ast du ee 105 4 VM3618 Preface www vxitech com SECTION RE BEN 107 Theory of Oper tion cn eee eei Re ike date ee e OR HH ETE e e EEN d et 107 TntFOduCtiQn eoo me onis chr dni desti ee 107 Interface and Control EPCGA sese eene nennen en en nnne n nenne ere
16. SOURce SETup TRIGger SEQuence SLOPe TRIGger SEQuence SOURce selected by the channel list Set the output level of all channels using the N A binary data from a selected location in the scan list TRIGger SEQuence IMMediate Causes atriggereventtooccur NA the active edge edge Selects the trigger event that updates the X AUTO DACs on the VM3618 mode Query the number of times the VM3618 has been calibrated Save the current calibration constants into non volatile memory Enter a voltage list for manual loading 0 Sets the polarity of the output trigger pulse i output a trigger pulse output pins output pins open Enable or disable the operation of the scan X un p Set the scan loop back limit 512 Enter a voltage list on a per channel basis 0 Enter a voltage in a specific location in a list selected by the channel list Set the output level of the channels selected X 0 by the channel list using the binary data RST Reset Value N A Description non volatile memory m 1 security enabled N A selected channel Set the calibration constant for the gain of the Values from Set the code required to disable calibration security Enable or disable calibration security Values from non volatile memory Set the calibration constant for the offset of X the selected channel NEG Enables or disables an output trigger pulse to 0 the TTL trigger l
17. Support Phone 949 955 1894 Fax 949 955 3041 E mail support vxitech com Visit http www vxitech com for worldwide support sites and service plan information VM3618 Introduction 11 VXI Technology Inc VM3618 Preface www vxitech com SECTION 1 INTRODUCTION INTRODUCTION The VM3618 provides eight independent digital to analog converter DAC channels with 16 bits of resolution and isolated outputs This module is part of the VMIP family of instruments and can be combined with up to two other modules to form a high density VXIbus instrument that fully uses the capabilities of the VMIP The instrument uses the message based word serial interface for programming and data movement as well as supporting direct register access for high speed data throughput The VM3618 command set conforms to the SCPI standard for consistency and ease of programming The VM3618 is a member of the VXI Technology VMIP VXI Modular Instrumentation Platform family and is available as an 8 16 or 24 channel single wide V XIbus instrument In addition to the three standard configurations the VM3618 may be combined with any of the other members of the VMIP family to form a customized and highly integrated instrument see Figure 1 1 This allows the user to reduce system size and cost by combining the VM3618 with two other instrument functions in a single wide C size VXIbus module Figure 1 2 shows the 24 channel version of the V
18. cause the instrument to perform improperly Response Description Examples Command Query CAL STORE Related Commands CALibration lt channel gt GAIN lt value gt CA Libration lt channel gt ZERO lt value gt CALibration DATA lt block data gt 76 VM3618 Command Dictionary www vxitech com CALibration ZERO Purpose Set the calibration constant for the selected channel s offset Type Event Command Syntax CALibration lt channel gt ZERO lt value gt OHM acme lt channel gt 1 2 3 4 5 6 7 8 value 32768 to 32767 RST Value Set to values stored in non volatile memory Query Syntax CALibration lt channel gt ZERO Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response Returns the currently used calibration value for the specified channel Description If CALibration STORe AUTO ON is active the command will save the new constant to the non volatile memory each time the command is sent If CALibration STORe AUTO OFF is active a CALibration STORe command must be executed in order to save the new constant The CALibration ZERO command will only function when calibration security is disabled otherwise an error is generated Calibration commands should only be executed by qualified Ay personnel Changing these values incorrectly can cause the instrument to perform improperly Response Description Examples Comma
19. in this register and queries always report a 0 Examples Command Query Response Description STAT QUES Related Commands None VM3618 Command Dictionary 103 VXI Technology Inc SYSTem ERRor Purpose Query the Error Queue Type Required SCPI command Command Syntax None Query Only S O IE WEINI GV N A RST Value N A Query Syntax SYSTem ERRor Query Parameters None Query Response ASCII string Description The System Error query is used to retrieve error messages from the error queue The error queue will maintain up to two error messages If additional errors occur the queue will overflow and the second and subsequent error messages will be lost In the case of an overflow an overflow message will replace the second error message See the SCPI standard Volume 2 Command Reference for details on errors and reporting them Examples Command Query Response Description SYST ERR 350 No error Related Commands None 104 VM3618 Command Dictionary www vxitech com SYSTem VERSion Purpose Query which version of the SCPI standard the module complies with Type Required SCPI command Command Syntax None Query Only Command Parameter N A RST Value N A Query Syntax SYSTem VERSion Query Parameters None Query Response Numeric ASCII value Description The System Version query reports version of the SCPI standard with which the VM3618 complies
20. 0 N A BFFF 4 999695 7 999512 14 999695 23 999512 19 998779 BFFE 4 999390 7 999023 14 999390 23 999023 19 997559 8001 0 000305 0 000488 10 000305 16 000488 0 001221 8000 0 000000 0 000000 10 000000 16 000000 0 000000 7FFF 0 000305 0 000488 9 999695 15 999512 0 001221 4001 4 999695 7 999512 5 000305 8 000488 19 998779 4000 5 000000 8 000000 5 000000 8 000000 20 000000 3FFF 5 000305 8 000488 4 999695 7 999512 N A 3FFE 5 000610 8 000977 4 999390 7 999023 N A 0001 9 999695 15 999512 0 000305 0 000488 N A 0000 10 000000 16 000000 0 000000 0 000000 N A There are two types of register access direct register access and pseudo register access Direct register access is the fastest type with an access time approximately 0 5 us actual speed depends on the controller used While direct register access is fast there is no calibration correction done by the module In the direct register access mode the user is responsible for doing calibration corrections before storing in the register Direct register access also has no read back Values read from the registers are undefined 44 VM3618 Programming www vxitech com The second type of register access is called pseudo register access Pseudo register access is slower than direct register access with an access time approximately 40 us While pseudo register access is slower than direct register access the module performs the offset and scale associated with the calibration constants P
21. 07 109 calibration Constant 13 107 CALibration COUNK eese 57 71 CAL brapon OAIN eene 57 72 CALibration SECure CODE eee 57 73 CALibration SECure STATe sse 57 74 S CALibration STORe eee 57 75 CALibration ZERO ssenssssseeissssssesrresereserrrrssressrersseres 57 76 EE EE le EE 12 13 GOEN GE 18 s Tent iG A i o det ee IR 107 109 EE 51 8 conversion cycle ettet 109 SCAN TABLe LOCation eee 57 88 cooling ss 16 SOURce CURRent LEVel 37 89 SOURce DATA 57 90 D SOURce SETup o cescscccsessessssesessesesesseseseseeeeees 57 92 EE 12 13 106 107 109 BO Ree WOT Hee LEVEL ee davas 107 Specifications enne 14 TRE STATus OPERation CONDition 58 96 F STATus OPERation ENABle s s s 58 97 STATus OPERation EVENt esee 58 98 EP GAG sea cies ot d ech oc sob Er e i do rte 107 STATus PRESet sss 58 99 front parel seg eem eae tee mederi ne ai 18 STATus QUEStionable CONDition 58 100 G STATus QUEStionable ENABle s 58 101 STATus QUEStionable EVENt 58 102 PODES 107 SILA e esta e tete E tea dere e a TRU 20 I SYSTem ERRor EA 58 103 SN Sfem VER Bian 58 104 INHOUSE PSEUDO sese 77 T Interface Kb Af iere geesde tete de 107 109 K tree structured language essssessesseseeseeseseeessssesr
22. 18 CALIBRATION CHANNEL MIN 1 to vtvm3618 CALIBRATION CHANNEL MAX 8 ViReal32 gainVal This parameter specifies the calibration gain for the selected channel Valid Range vtvm3618 CALIB GAIN MIN 0 000000 vtvm3618 CALIB GAIN MAX 1 000000 Vilntl6 offsetVal This parameter specifies the calibration offset for the selected channel Valid Range vtvm3618 CALIBRATION DATA MIN 32768 to vtvm3618 CALIBRATION DATA MAX 32767 ViChar password This parameter specifies the calibration security access code Valid Range An ASCII string whose length is in the range vtvm3618 PASSWORD LEN MIN 1 to vtvm3618 PASSWORD LEN MAX 12 ViBooleanstoreDontstore This parameter specifies whether the calibration constants are to be stored in the Non Volatile memory or not Valid Range Interpretation vtvm3618 STORE Store Calibration Data vtvm3618 DONT STORE Don t Store Calibration Data VM3618 Programming 47 VXI Technology Inc ViPInt32count This parameter returns the calibration count i e the number of times the module has been calibrated Return Values Returns VI SUCCESS if successful else returns error value Description This function 1s an application function which shows how the user can use core driver functions to calibrate the channels This function sets the calibration gain and calibration offset for the specified channel If Store Don t Store switch Is set to Store it stores these c
23. 8 Bit 7 Correcting not used on the VM3618 Examples Command Que Response Description STAT OPER Related Commands None VM3618 Command Dictionary 99 VXI Technology Inc STATus PRESet Purpose Presets the Status Registers Type Required SCPI command Command Syntax STATus PRESet Command Parameters None RST Value N A Query Syntax None Command Only Query Parameters N A Query Response N A Description Examples Related Commands Command Query Response Description The Status Preset command presets the Status Registers The Operational Status Enable Register is set to 0 and the Questionable Status Enable Register is set to 0 This command is provided for SCPI compliance only STAT PRES 100 VM3618 Command Dictionary www vxitech com STATus QUEStionable CONDition Purpose Query the Questionable Status Condition Register Type Required SCPI command Command Syntax None Query Only S O IE WEINI GV N A RST Value N A Query Syntax STATus QUEStionable CONDition Query Parameters None Query Response 0 Description The Questionable Status Condition Register query 1s provided for SCPI compliance only The VM3618 does not alter any of the bits in this register and a query always reports a 0 Examples Command Query Response Description STAT Q
24. 8 TRIG SRC EXT vtvm3618 TRIG SRC TTLTRGO vtvm3618 TRIG SRC TTLTRGI vtvm3618 TRIG SRC TTLTRG2 vtvm3618 TRIG SRC TTLTRG3 vtvm3618 TRIG SRC TTLTRG4 vtvm3618 TRIG SRC_TTLTRGS5 vtvm3618 TRIG SRC TTLTRG6 vtvm3618 TRIG SRC TTLTRG7 vtvm3618 TRIG SRC INT CHI vtvm3618 TRIG SRC INT CH2 vtvm3618 TRIG SRC INT CH3 vtvm3618 TRIG SRC INT CHA vtvm3618 TRIG SRC INT CH5 vtvm3618 TRIG SRC INT CH6 INT INT vtvm3618 TRIG SRC CH7 vtvm3618 TRIG SRC CH8 vtvm3618 TRIG SRC IMMImmediate ViBoolean slope This parameter is used to configure the active edge of the triggering signal This parameter is considered only for the EXTernal trigger Interpretation External TTL Trigger 0 TTL Trigger 1 TTL Trigger 2 TTL Trigger 3 TTL Trigger 4 TTL Trigger 5 TTL Trigger 6 TTL Trigger 7 Internal Channel 1 Internal Channel 2 Internal Channel 3 Internal Channel 4 Internal Channel 5 Internal Channel 6 Internal Channel 7 Internal Channel 8 source and the TTLT trigger sources i e when the trigger source is one of the following vtvm3618 TRIG SRC EXT vtvm3618 TRIG SRC TTLTRGO vtvm3618 TRIG SRC TTLTRGI vtvm3618 TRIG SRC TTLTRG2 vtvm3618 TRIG SRC TTLTRG3 vtvm3618 TRIG SRC TTLTRG4 vtvm3618 TRIG SRC TTLTRG5 vtvm3618 TRIG SRC TTLTRG6 vtvm3618 TRIG SRC TTLTRG7 Valid Values vtvm3618 SLOPE POSITIVE vtvm3618 SLOPE NEGATIVE ViReal32 outputLevel This parameter sets the output level for the specified channel s Int
25. ACE WIRING Front panel connector J201 contains all the instrument signals for the 8 channel version of the VM3618 instrument VM3618 1 The 16 channel version VM3618 2 has J201 and J202 provided while the 24 channel version VM3618 3 has J200 J201 and J202 The wiring for each of these connectors is identical Since each group of eight channels is treated as a separate instrument the module will have three Channel 1s three Channel 2s three Channel 3s etc if three VM3618s are installed TABLE 2 1 PIN ASSIGNMENTS FOR MODELS VM3618 ADC PIN SIGNAL PIN SIGNAL PIN SIGNAL PIN 1 NC 12 GND6 23 RETURN3 34 2 NC 13 NC 24 RETURN4 35 3 TRIGIN 14 GND7 25 NC 36 4 GND 15 GND8 26 RETURNS 37 5 GNDI 16 NC 27 RETURN6 38 6 GND2 17 NC 28 NC 39 7 NC 18 NC 29 RETURN7 40 8 GND3 19 GND 30 RETURNS 41 9 GND4 20 RETURNI 31 NC 42 10 NC 21 RETURN2 32 NC 43 11 GND5 22 NC 33 GND 44 The connector for the VM3618 DAC board is a 44 pin female high density D Sub type Connections listed are for the model VM3618 8 channel DAC board A solder pot type mating connector is provided with each unit Contact the factory for more connector information The pin locations for J200 J201 and J202 are shown in Figure 2 2 16 e 1 00000000000000 000000000000 00000000000000 j GA e FIGURE 2 2 J200 J201 AND J202 PIN LOCATIONS VM3618 Preparation for Use 19 VXI Technology Inc F
26. ANUFACTURER S ADDRESS 2031 Main Street Irvine California 92614 6509 PRODUCT NAME Isolated Digital to Analog Converter MODEL NUMBER S VM3618 PRODUCT OPTIONS All PRODUCT CONFIGURATIONS All VXI Technology Inc declares that the aforementioned product conforms to the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 366 EEC inclusive 93 68 EEC and carries the CE mark accordingly The product has been designed and manufactured according to the following specifications SAFETY EN61010 2001 EMC EN61326 1997 w A1 98 Class A CISPR 22 1997 Class A VCCI April 2000 Class A ICES 003 Class A ANSI C63 4 1992 AS NZS 3548 w A1 amp A2 97 Class A FCC Part 15 Subpart B Class A EN 61010 1 2001 The product was installed into a C size VXI mainframe chassis and tested in a typical configuration I hereby declare that the aforementioned product has been designed to be in compliance with the relevant sections of the specifications listed above as well as complying with all essential requirements of the Low Voltage Directive December 2003 C Jerry Patton QA Manager VM3618 Introduction 7 VXI Technology Inc VM3618 Preface www vxitech com GENERAL SAFETY INSTRUCTIONS Review the following safety precautions to avoid bodily injury and or damage to the product These precautions must be observed during all phases of operation or service of this product Failure to comply w
27. Calibration Store onse ET RE ETRAS E ARD E ERES MD E RR Calibration Zero EE tup EP xenMEE E Scan Table Loc tion Eege Source Current Level AER Source D ta TE NIMIUM E Source Voltage Level nA Ate eie te w eps So SR ine gie EES Trigger S quence Immediate tette edet e RA NIRE A To edited t ye ette Trigger Sequence Slope scene ie tee Eee tei ree Miet e Ee eie chee Trigger Sequence Source Application Examples Register Access Examples VXI plus amp play Examples eene adr ee E eu e pente o res E rese UNS VM3618 Introduction 3 VXI Technology Inc SECTION amp ge 55 Command Dictionary i e n ebrei ere eei le Pe ee eee CH ete e eben d 55 lus EIE RAM 55 Alphabetical Command Listing eese ener entren nn enne ne nennen nennen rre 55 Th amp channel dist Parameter o i en RR ecd a P n p 56 Command Te Hagen otto evt e e ue EU Ie ERST erbe ERN Totes 60 IEEE 488 2 Common Commands sese eter tede ederet desees seed eer eed desees 61 uo I ere 61 OPES Fecha niii Matt PS Ren tat ia te eae hes Mapa ber eMe rise eg ee Dir Miam Red A 62 pil M 63 iad ED IN i hie tec esi e aeu tide dieit bee cati i A iet Oe D ee 64
28. E signal to the DAC when the specified trigger has been received thus latching the data into the DACs internal register and causing the DACs to convert The outputs of the DACs are routed through their respective amplifiers as all DACS have independent amplifiers and on to the front panel All DAC outputs use a predefined offset for nulling conversion errors 108 VM3618 Theory of Operation www vxitech com DATA 0 7 raf i m DATA 8 15 DATA ii gt BUFFER Ch MUX Le HANDSHAKING gt Li LBENA gt 15 4 HBENA gt DAC DACOUT amp FRONT ME Lal ECTS TIMING AND PANEL TRIGGER CONTROL UPDATE TTL Fi BUS TRIGGERS MUX TRIGIN FPGA G EXTERNAL CAL DATA A bestemmen ET TRIGGER CONTROL CAL ADD 1 4 gt OFFSET ENABLE n REFERENCE DAC ENABLE DACENABLE DECODERS FIGURE 5 2 INTERFACE AND CONTROL FPGA FUNCTIONAL DIAGRAM VM3618 Theory of Operation 109 VMIP BEE REES p REF1 REES p PRECBION REEZ p DATA 0 15 REFERENCE i CONTROL AND HANDSHAKING V PRECBION DAC VXI Technology Inc TO AD 1 4 e INTERFACE AND R DACOUT FRONT CONTROL PANEL FPGA CACIK p SERIALDATA LGAN3 p NV LOCAL al LeANd LOFFSET4 RESET DAC OFFSET3 e OFFSET4 e TO PRECBION DAC CHANNEL2
29. FIGURE 1 2 FRONT PANEL LAYOUT VM3618 Introduction www vxitech com VM3618 SPECIFICATIONS GENERAL SPECIFICATIONS NUMBER OF CHANNELS VM3618 1 8 VM3618 2 16 VM3618 3 24 VOLTAGE MODES Output Range 10 0 V 16 0 V 0 0 20 0 V 0 0 32 0 V Output Current 20 mA max per channel normal operation Short Circuit 50 mA max per channel short circuit Continuous duration Slew Rate 3 V us 20 mA load Resolution 16 bits 15 bits monotonic Differential Ripple amp Noise 2 MVpms 20 Hz 300 kHz 10 kQ load CURRENT MODES Output Range 20 mA Output Voltage 12 0 V max compliance at 20 mA output 16 0 V max compliance at 5 mA lt 18 0 V open circuit Resolution 15 bits 14 bits monotonic Differential Ripple amp Noise 2 uA rms 20 Hz 300 kHz 250 Q load SETTLING TIME 20 us to 0 1 of specified value GAIN ERROR 0 015 0 003 C of setting OFFSET ERROR 2 LSB 0 04 LSB C CONVERSION RATE gt 100 000 changes per second dir register access mode gt 20 000 changes per second pseudo register access gt 300 changes per second word serial access mode ISOLATION 100 Vrms 150 VDC AC pk channel to channel or chassis POWER REQUIREMENTS VM3618 1 5 0 V 1 40 A 5 2 V 0 10 A 24 0 V 0 70 A VM3618 2 5 0 V 2 05 A 5 2 V 0 20 A 24 0 V 140A VM3618 3 5 0 V 2 70 A 5 2 V 0 30 A 4324 0 V 2 10 A MANUFAC
30. M3618 The 16 channel version would not have J200 and its associated LEDs and nomenclature while the 8 channel version would also eliminate J202 FIGURE 1 1 VMIP PLATFORM VM3618 Introduction 13 VXI Technology Inc Regardless whether the VM3618 1s configured with other VM3618 modules or with other VMIP modules each group of eight channels 1s treated as an independent instrument in the VXIbus chassis and each group has its own FAIL and ACCESS light DESCRIPTION The VM3618 instrumentation module provides eight independent isolated channels of a digital to analog converter DAC each with 16 bits of resolution Each channel consists of a DAC combined with an output amplifier that allows for output voltage ranges that can be 16 VDC 0 to 32 VDC This module is part of the VMIP family of instruments and can be combined with up to two other modules to form a high density VXIbus instrument that fully uses the capabilities of the VMIP In order to support accelerated testing the module supports up to 512 predefined setups Each setup is numbered and defines the voltage of each DAC on the board All the voltages can then be set with a single command To further speed up testing the DAC module supports up to 16 different scan lists each 512 entries long The scan list is a predefined sequence of setups that is loaded into the DACs The scan list when enabled can be incremented through any of the
31. N is active the command will save the new constant to the non volatile memory each time the command is sent its effect is immediate If the CALibration SSTORe AUTO OFF is active a CALibration STORe command must be executed in order to save the new constant in non volatile memory The Calibration Gain command will only function when calibration security is disabled otherwise an error is generated Note that the query returns the value from the non volatile memory rather than the currently used value and may be different from the constant currently being used Calibration commands should only be executed by qualified personnel Changing these values incorrectly can cause the instrument to perform improperly Response Description Examples Command Query CAL2 GAIN 120 CAL2 GAIN 120 Related Commands CALibration lt channel gt ZERO value CALibration DATA block data VM3618 Command Dictionary 73 VXI Technology Inc CALibration SECure CODE Purpose Sets the code required to disable calibration security Type Instrument specific SCPI Command Syntax CALibration SECure CODE lt code gt EUR ETH GC lt code gt 1 to 12 ASCII character string RST Value N A Query Syntax CALibration SECure CODE Query Parameters N A Query Response IEEE 488 2 definite length arbitrary block Description The Calibration Secure Code command se
32. ND DICTIONARY INTRODUCTION This section presents the instrument command set It begins with an alphabetical list of all the commands supported by the VM3618 divided into three sections IEEE 488 2 commands the instrument specific SCPI commands and the required SCPI commands With each command is a brief description of its function whether the command s value is affected by the RST command and its default value The remainder of this section is devoted to describing each command one per page in detail The description is presented in a regular and orthogonal way assisting the user in the use of each command Every command entry describes the exact command and query syntax the use and range of parameters and a complete description of the command s purpose ALPHABETICAL COMMAND LISTING The following tables provide an alphabetical listing of each command supported by the VM3618 along with a brief description If an X is found in the column titled RST then the value or setting controlled by this command is possibly changed by the execution of the RST command If no X is found then RST has no effect The default column gives the value of each command s setting when the unit is powered up or when a RST command is executed VM3618 Command Dictionary 55 VXI Technology Inc THE CHANNEL LIST PARAMETER A channel list is a SCPI convention for specifying one or more channels A channel list begins with a left parenthesis and
33. Session instrHndl Vilnt16 channel Vilnt16 mode Vilnt16 count ViReal32 outputLevelList Vilnt16 numElems ViStatus status VI NULL Vilnt16 channelList 1 channelList 0 channel Resetting the module to its default state status vtvm3618 reset instrHndl if status lt VI SUCCESS return status Configuring the TTLT Line 0 as the trigger source for the Scan Mode Si status vtvm3618 configTriggerParams instrHndl vtvm3618 TRIG SRC TTLTRGO vtvm3618 SLOPE POSITIVE if status VI SUCCESS return vtvm3618 ERROR SETTING TRIGGER PARAMS Configuring the Scan Mode of the specified channel status vtvm3618 setupScanMode instrHndl mode channelList 1 if status VI SUCCESS return vtvm3618 ERROR SETTING SCAN MODE Configuring the Scan List for the specified channel Ki status vtvm3618 setupScanList instrHndl channel outputLevelList numElems if status VI SUCCESS return vtvm3618 ERROR SETTING SCAN LIST VM3618 Programming 53 VXI Technology Inc Configuring the Scan Limit Index in the scan array where the interrupt routine loading the DAC will either stop or loop back to zero depending on the scan mode status vtvm3618 setupScanLimit instrHndl channel count if status lt VI SUCCESS return vtvm3618 ERROR SETTING SCAN LIMIT return VI SUCCESS VM3618 Programming 54 www vxitech com SECTION 4 COMMA
34. TRIGGER SEQUENCE SOURCE The Trigger Sequence Source configures the trigger event that will update the DACSs on the VM3618 module It must be noted that when using the SCAN mode of operation a trigger source of either EXTernal or TTL T n must be selected TRIGger SEQuence SOURce source Where source specifies the triggering signal EXAMPLES TRIG SOUR EXT Configures the front panel trigger input as the active triggering signal TRIG SOUR INT3 Configures Channel 3 as the active triggering signal All the other channels will wait for Channel 3 to update TRIG SOUR Returns Channel 3 as the active triggering INT3 signal TRIG SOUR TTLT2 Configures TTLT2 as the active triggering signal SCAN ON Q 1 4 Configures the scan mode for Channels 1 through 4 as ON TRIG SOUR Returns TTLT2 as the triggering signal TTLT2 42 VM3618 Programming www vxitech com APPLICATION EXAMPLES The following example shows how the SCPI commands can be used to set up the trigger parameters of the instrument and to configure the output level of the channels TRIG SOUR EXT TRIG SLOP NEG RANG 20V 1 RANG 20mA 2 ROUT CLOS Q 1 2 SOUR VOLT LEV 10 1 Q 1 SOUR CURR LEV 2 1 2 Configuring the triggering source of the module as EXT i e the front panel input Configuring the negative edge of the input trigger to be the triggering edge Configuring Channel I to operate on the 20 V range Configuri
35. TURER S ID 3915 MODULE MODEL CODE 271 Note The manufacturer does not recommend combining VM3618 modules with VM2XXX series modules within the same VMIP base unit VM3618 Introduction 15 VXI Technology Inc VM3618 Introduction www vxitech com SECTION 2 PREPARATION FOR USE INSTALLATION When the VM3618 is unpacked from its shipping carton the contents should include the following items 1 VM3618 VXIbus module 1 VM3618 Digital to Analog Converter Module User s Manual this manual All components should be immediately inspected for damage upon receipt of the unit Once the VM3618 is assessed to be in good condition it may be installed into an appropriate C size or D size VXIbus chassis in any slot other than slot zero The chassis should be checked to ensure that it is capable of providing adequate power and cooling for the VM3618 Once the chassis is determined adequate configure the logical address of the VM3618 and the chassis backplane jumpers before installing the VM3618 CALCULATING SYSTEM POWER AND COOLING REQUIREMENTS The power and cooling requirements of the VM4018 are given in the Specifications section of Chapter in this manual It is imperative that the chassis provide adequate power and cooling for this module Referring to the chassis User s Manual confirm that the power budget for the system the chassis and all modules installed therein is not exceeded and that the cooling sys
36. UES COND Related Commands None VM3618 Command Dictionary 101 VXI Technology Inc STATus QUEStionable ENABle Purpose Sets the Questionable Status Enable Register Type Required SCPI command Command Syntax STATus QUEStionable ENABle lt NRF gt Sube KC lt NRF gt numeric ASCII value from 0 to 32767 RST Value N A Query Syntax STATus QUEStionable ENABle Query Parameters None Query Response Numeric ASCII value from 0 to 32767 Description The Status Questionable Enable command sets the bits in the Questionable Status Enable Register This command is provided only to comply with the SCPI standard The Status Questionable Enable query reports the contents of the Questionable Status Enable Register The VM3618 does not alter the bit settings of this register and will report the last programmed value Examples Command Query Response Description STAT QUES ENAB 64 STAT QUES ENAB 64 Related Commands None 102 VM3618 Command Dictionary www vxitech com STATus QUEStionable E VE Nt Purpose Query the Questionable Status Event Register Type Required SCPI command Command Syntax None Query Only ROT IER WEINI GV N A RST Value N A Query Syntax STATus QUEStionable EVENt Query Parameters None Query Response 0 Description The Questionable Status Event Register is provided for SCPI compliance only The VM3618 does not alter the bits
37. UR VOLT LEV 20 1 4 RANG 32V 1 2 SOUR VOLT LEV 10 1 1 SOUR VOLT LEV 2 20 Configures the output voltage level for Channels 1 through 4 to 20 V Configures the operating range for Channels 1 and 2 to 0 to 32 V Configures the output voltage level for Channel 1 to 10 1 V Returns the output voltage level for Channel 2 as 20 V VM3618 Programming 39 VXI Technology Inc TRIGGER SEQUENCE IMMEDIATE The Trigger Sequence Immediate command causes a trigger event to occur TRIGger SEQuence IMMediate There are no parameters for this command EXAMPLES TRIG Causes a trigger event to occur TRIG SEQ Causes a trigger event to occur TRIG IMM Causes a trigger event to occur TRIG SEQ IMM Causes a trigger event to occur 40 VM3618 Programming www vxitech com TRIGGER SEQUENCE SLOPE The Trigger Sequence Slope command configures which edge of the active triggering signal is the active edge This command applies only to the EXTernal or TTLT lt n gt trigger sources TRIGger SEQuence SLOPe lt slope gt Where lt slope gt specifies the active edge of the triggering signal EXAMPLES TRIG SLOP POS Configures the positive edge as the active edge of the triggering signal TRIG SLOP NEG Configures the negative edge as the active edge of the triggering signal TRIG SLOP Returns the negative edge as the active edge NEG of the triggering signal VM3618 Programming 41 VXI Technology Inc
38. URE 2 1 LOGICAL ADDRESS SWITCH SETTING EXAMPLES The VMIP may contain three separate instruments and will allocate logical addresses as required by the VXIbus specification revisions 1 3 and 1 4 The logical address of the instrument is set on the VMIP carrier The VMIP logical addresses must be set to an even multiple of 4 unless dynamic addressing is used Switch positions 1 and 2 must always be set to the OFF position Therefore only addresses of 4 8 12 16 252 are allowed The address switch should be set for one of these legal addresses and the address for the second instrument the instrument in the center position will automatically be set to the switch set address plus one while the third instrument the instrument in the lowest position will automatically be set to the switch set address plus two If dynamic address configuration is desired the address switch should be set for a value of 255 All switches set to ON Upon power up the slot 0 resource manager will assign the first available logical addresses to each instrument in the VMIP module If dynamic address configuration is desired the address switch should be set for a value of 255 Upon power up the slot 0 resource manager will assign logical addresses to each instrument in the VMIP module VM3618 Preparation for Use www vxitech com FRONT PANEL SIGNAL OUTPUT OUTPUT2 NC OUTPUT3 OUTPUT4 NC OUTPUTS OUTPUT6 NC OUTPUT OUTPUTS INTERF
39. VM3618 Programming 33 SCAN TABLE VXI Technology Inc The Scan Table command sets up the scan list for the specified channel It allows entries of a list of voltage current values to be placed in the specified channel scan list SCAN TABLe lt channel gt lt value_list gt Where channel specifies the channel whose scan list is to be configured Where value list specifies the voltage current values that are to be loaded into the scan list of the specified channel The number of values in this list range from 1 to 512 EXAMPLES SCAN TABL 1 2 3 4 5 SCAN 1 332 2 999878 4 000244 5 000000 Loading 4 values into the scan list for Channel 1 Returns 3 values from the scan list of Channel 1 starting at index 2 34 VM3618 Programming www vxitech com SCAN TABLE LOCATION The Scan Table Location command is used to load a voltage current value at a specified location in the scan list of the specified channel SCAN TABLe lt channel gt LOCation lt number gt lt value gt Where lt channel gt specifies the channel whose scan list at the specified index is to be configured Where lt number gt specifies a value in the range 1 512 where the voltage current is to be loaded into the scan list Where lt value gt specifies the voltage current value that is to be loaded into the scan list of the specified channel at the specified index EXAMPLES SCAN TABLI LOC 10 4 SCAN TABL1 LOC
40. age based on IEEE STD 488 2 Specifications It uses the IEEE STD 488 2 Standard command and the device dependent commands are structured to allow multiple branches off the same trunk to be used without repeating the trunk To use this facility end each branch with a semicolon For example VOLTage LEVel and CURRent LEVel are both branches off the SOURce trunk and can be combined as follows SOURce VOLTage LEVel value channel list CURRentLE Vel value channel list The above command is the same as the these two commands SOURce VOLTage LEVel value channel list SOURce CURRentLEVel value channel list See the Standard Command for Programmable Instruments SCPI Manual Volume 1 Syntax amp Style Section 6 for more information The SCPI commands in this section are listed in upper and lower case Character case is used to indicate different forms of the same command Keywords can have both a short form and a long form some commands only have one form The short form uses just the keyword characters in uppercase The long form uses the keyword characters in uppercase plus the keyword characters in lowercase Either form is acceptable Note that there are no intermediate forms All characters of the short form or all characters of the long form must be used Short forms and long forms may be freely intermixed The actual commands sent can be in upper case lower case or mixed case case is only used to distingui
41. an sign Channels are then listed as individual comma separated channels or as a range of channels separated by a colon Finally a trailing right parenthesis ends the channel list EXAMPLES 1 Channel 1 1 4 Channels 1 and 4 1 2 3 4 Channels 1 2 3 and 4 1 8 Channels 1 2 3 4 5 6 7 and 8 56 VM3618 Command Dictionary www vxitech com TABLE 4 1 IEEE 488 2 COMMON COMMANDS Command Description RST Reset Value CLS ESE Set the Event Status Enable Register N A ESR Query the Standard Event Status Register N A IDN Query the module identification sting N A OPC 0 RST Reset the module to a known state NA SRE Set the Service Request Enable Register NA STB Query the Status Byte Register NA TRG Causes a trigger event to occur NA TST Starts and reports a self test procedure IL N A WAI Halts execution and queries JL NA VM3618 Command Dictionary VXI Technology Inc TABLE 4 2 INSTRUMENT SPECIFIC SCPI COMMANDS Command CALibration COUNt CALibration GAIN CALibration SECure CODE CALibration SECure STATe CALibration STORe CALibration ZERO MEMory SETup OUTPut TRIGger SLOPe OUTPut TRIGger TTLTrig OUTPut TTLTrig STATe RANGe ROUTe CLOSe ROUTe OPEN SCAN SCAN LIMit SCAN TABLe SCAN TABLe LOCation SOURce CURRent LEVel SOURce DATA SOURce VOLTage LEVel
42. an list operation mode to be configured for the specified channels Where channel list specifies the which channels scan list mode is to be configured For more details on the syntax of the channel list see Section 4 EXAMPLES SCAN ON Q 2 8 SCAN LOOP 1 SCAN 1 LOOP Configures the Scan Mode for Channels 2 through 8 as ON Configures the Scan Mode for Channel I as LOOP Returns the current scan mode operation for Channel 1 32 VM3618 Programming www vxitech com SCAN LIMIT The Scan Limit command sets the point in the scan list array of the specified channel where the interrupt routine loading the DAC either stops loading or loops back to zero SCAN LIMit lt channel gt lt count gt Where lt channel gt specifies the channel whose scan limit is to be configured Where lt count gt is a value in the range 1 512 which specifies the point in the scan list array where the interrupt routine loading the DAC should either stop loading or loop back to zero EXAMPLES SCAN LIM 1 20 SCAN LOOP 1 SCAN LIM 1 30 SCAN LIM 1 30 Configures the scan limit for Channel I as 20 Configuring the scan mode for Channel I as LOOP Configuring the scan limit for Channel 1 as 30 The interrupt routine loading the DAC 1 will load values from index 1 to 30 from the scan list after which it will loop back to zero and continue Returns the scan limit corresponding to Channel 1
43. ange of 0 to 255 RST Value N A Query Syntax ESE Query Parameters None Query Response Numeric ASCII value from 0 to 255 Description The Event Status Enable command is used to set the bits of the Event Status Enable Register See ANSI IEEE488 2 1987 section 11 5 1 for a complete description of the ESE register A value of 1 in a bit position of the ESE register enables generation of the ESB Event Status Bit in the Status Byte by the corresponding bit in the ESR If the ESB is set in the SRE register then an interrupt will be generated See the ESR command for details regarding the individual bits The ESE register layout 1s Bit 0 Operation Complete Bit 1 Request Control not used in the VM3618 Bit 2 Query Error Bit 3 Device Dependent Error not used in the VM3618 Bit 4 Execution Error Bit 5 Command Error Bit 6 User Request not used in the VM3618 Bit 7 Power On The Event Status Enable query reports the current contents of the Event Status Enable Register Examples Command Query Response Description ESE 36 ESE 36 Related Commands 62 VM3618 Command Dictionary www vxitech com ESR Purpose Query the Standard Event Status Register Type IEEE488 2 Common Command Command Syntax None Query Only Command Parameter N A RST Value N A Query Syntax ESR Query Parameters None Query Response Numeric ASCII value from 0 to
44. array some channels could loop back while others continue in the array lt value_list gt is a list of values to be loaded into the channel scan list These are values delimited by commas The number of values in the list ranges from 1 to 512 lt count gt is the number of values to be returned If not specified the entire 512 element scan list will be returned lt start gt specifies a point in the 512 element array to begin the returning of values The reset value is zero all elements in the array are set to 0 volts on the 16 volt range Examples Command Query Response Description SCAN TABL1 2 3 4 5 SCAN TABL 132 2 999878 4 000244 5 000000 Related Commands SCAN MODE lt mode gt lt channel_list gt SCAN LIMit lt channel gt lt count gt 88 VM3618 Command Dictionary www vxitech com SCAN TABLe LOCation Purpose Enter a voltage in a specific location in a list Type Instrument specific SCPI Command Syntax SCAN TABLe lt channel gt LOCation lt number gt lt value gt ROUTE ENNESCH lt channel gt 1 2 3 4 5 6 7 8 lt number gt A specific location in the scan list array value A single value RST Value N A Query Syntax SCAN TABLe lt channel gt LOCation lt number gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 lt number gt A specific location in the scan list array Query Response A single value Description The Scan Table L
45. ated channel s to the corresponding front panel connector Examples Command Query Response Description ROUT CLOS 2 Connects Channel 2 to its front panel connector ROUT CLOS 2 1 Indicates that the channel is connected to its front panel connector Related Commands ROUTe OPEN 84 VM3618 Command Dictionary www vxitech com ROUTe OPEN Purpose Disconnect one or more channels from their output pins Type Instrument specific SCPI Command Syntax ROUTe OPEN lt channel_list gt ROUTE ENNESCH lt channel gt 1 2 3 4 5 6 7 8 Reset Value RST sets all channels open Query Syntax ROUTe OPEN lt channel gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response 1 0 1 open 0 close Description The Route Open command disconnects the indicated channel s from their front panel connectors Examples Command Query Response Description ROUT OPEN 2 Disconnects Channel 2 from its front panel connector ROUT OPEN 2 1 indicates that Channel 2 is disconnected from its front panel connector Related Commands ROUTe CLOSe VM3618 Command Dictionary 85 VXI Technology Inc SCAN Purpose Enable or disable the operation of the scan list function Type Instrument specific SCPI Command Syntax SCAN lt mode gt lt channel_list gt Command Parameter lt mode gt 0 1 ON OFF LOOP channel list
46. e 0 or OFF means values may be stored in non volatile memory 1 or ON means values may NOT be stored in non volatile memory The code parameter must be present to disable the security mode of 0 or it generates error 109 Missing parameter The value must match the currently programmed security code or it generates error 224 Illegal parameter value To enable security the code parameter is not required but if it is provided it will be checked If the code is given but does not match the current security code error 224 Illegal parameter value will be generated Calibration commands should only be executed by qualified personnel Changing these values incorrectly can cause the instrument to perform improperly Examples Command Que CAL SEC STAT 0 16VM3618 CAL SEC STAT Response Description Related Commands CALibration SECure CODE lt code gt VM3618 Command Dictionary 75 VXI Technology Inc CALibration STORe Purpose Save the current calibration constants into non volatile memory Type Instrument specific SCPI Command Syntax CALibration STORe OO EIN eel None RST Value N A Query Syntax None Command Only Query Parameters N A Query Response N A Description The CALibration SECure STATe must be OFF before using this command f Calibration commands should only be executed by qualified personnel Changing these values incorrectly can
47. ected channel lt n gt is updated all other channels wait for the selected channel to update TTLTrig lt n gt All outputs update when the selected TTL trigger line goes active The valid range for n is from 0 to 7 Examples Command Query Response Description TRIG SOUR TTLT3 TRIG SOUR Related Commands TRIGger SLOPe lt slope gt 96 VM3618 Command Dictionary www vxitech com INSTRUMENT SPECIFIC COMMANDS STATus OPERation C ONDition Purpose Query the Operation Status Condition Register Type Required SCPI command Command Syntax None Query Only One EIEIO N A RST Value N A Query Syntax STATus OPERation CONDition Query Parameters None Query Response 0 Description The Operation Status Condition Register query is provided for SCPI compliance only The VM3618 does not alter the state of any of the bits in this register and always reports a 0 Examples Command Query Response Description STAT OPER COND Related Commands None VM3618 Command Dictionary 97 VXI Technology Inc STATus OPERation ENABle Purpose Sets the Operation Status Enable Register Type Required SCPI command Command Syntax STATus OPERation ENABle lt NRF gt RO OO TT Be CC lt NRF gt numeric ASCII value from 0 to 32767 RST Value N A Query Syntax STATus OPERation ENABle Query
48. elated Commands MEMory SETup lt index gt lt value_list gt VM3618 Command Dictionary 93 VXI Technology Inc TRIGger SEQuence IMMediate Purpose Causes a trigger event to occur Type Instrument specific SCPI Command Syntax TRIGger SEQuence IMMediate Command Parameters None Reset Value N A Query Syntax None Query Parameters N A Query Response N A Description Examples Related Commands The Trigger Sequence Immediate command causes a trigger event to occur Command Query Response Description TRIG TRIG SEQ TRIG IMM TRIG SEQ IMM 94 VM3618 Command Dictionary www vxitech com TRIG ger SEQuence SLOPe Purpose Selects which edge of a triggering signal is the active edge Type Instrument specific SCPI Command Syntax TRIGger SEQuence SLOPe lt slope gt ROT VISIONE lt Slope gt POSitive NEGative RST Value POS Query Syntax TRIGger SLOPe Query Parameters None Query Response POS NEG Description The Trigger Sequence Slope Command Only applies to the External and TTL trigger sources It selects which edge of a triggering signal is the active edge Examples Command Query Response Description TRIG SLOP POS TRIG SLOP Related Commands TRIGger SEQuence SOURce VM3618 Command Dictionary 95 VXI Techno
49. emory Enabling the calibration security Returns the current calibration constant for Channel 1 s offset from the non volatile memory 28 VM3618 Programming www vxitech com RANGE The Range command is used to specify the operating range under which the specified channel should operate RANGe lt range gt lt channel_list gt Where lt range gt specifies the range under which the specified channel s should operate Where channel list specifies which channels operating range is to be configured For more details on the syntax of the channel list see Section 4 EXAMPLES RANG 16V 2 6 RANG 20mA 1 RANG 1 20MA RANG 32V 2 RANG 2 32V Configures the operating range for Channels 2 through 6 to 16 volts Configures the operating range for Channel I as 20 mA Returns the current operating range for Channel 1 Configuring the operating range for Channel 2 as 0 to 32 volts Returns the current operating range for Channel 2 VM3618 Programming 29 ROUTE CLOSE VXI Technology Inc The Route Close command is used to connect one or more channel outputs to their front panel connectors ROUTe CLOSe channel list Where channel list specifies the channels whose outputs are to be connected to their respective front panel connectors For more details on the syntax of the channel list see Section 4 EXAMPLES ROUT CLOS Q 1 8 ROUT CLOS 1 1 ROUT
50. er words it specifies the scan limit VM3618 Programming 51 VXI Technology Inc Valid Range vtvm3618 COUNT MIN 1 to vtvm3618 COUNT MAX 512 ViReal32 outputLevelList This parameter specifies the output level values to be set in the scan list array of the specified channel Each element of the array should be of the range specified below For the 10 Volt Range vtvm3618 VOLT LEVEL 10V MIN vtvm3618 VOLT LEVEL 10V MAX For the 16 Volt Range vtvm3618 VOLT LEVEL 16V MIN vtvm3618 VOLT LEVEL 16V MAX For the 20 Volt Range vtvm3618 VOLT LEVEL 20V MIN vtvm3618 VOLT LEVEL 20V MAX For the 20mA Range vtvm3618 VOLT LEVEL 20mA MIN vtvm3618 VOLT LEVEL 20mA MAX For the 32 Volt Range vtvm3618 VOLT LEVEL 32V MIN vtvm3618 VOLT LEVEL 32V MAX Vilnt16 numElems This parameter specifies the number of valid elements in the outputLevelList array Valid Range vtvm3618 VOLTAGE LIST MIN 1 to vtvm3618 VOLTAGE LIST MAX 512 Return Values Returns VI SUCCESS if successful Else returns error value Description This function is an application fuction that shows how the user can use core functions to load the specified channel s scan list with the voltage current values These values can then be loaded to the DAC using the interrupt routine 52 VM3618 Programming www vxitech com DEEE EEE EEEE kk kk kk ke kk kk kk kk kk kk ViStatus VI FUNC vtvm3618 setupScanListParams Vi
51. erpretation Positive edge Negative edge VM3618 Programming 49 VXI Technology Inc Valid Range For the 10 Volt Range vtvm3618 VOLT LEVEL 10V MIN vtvm3618 VOLT LEVEL 10V MAX For the 16 Volt Range vtvm3618 VOLT LEVEL 16V MIN vtvm3618 VOLT LEVEL 16V MAX For the 20 Volt Range vtvm3618 VOLT LEVEL 20V MIN vtvm3618 VOLT LEVEL 20V MAX For the 20mA Range vtvm3618 VOLT LEVEL 20mA MIN vtvm3618 VOLT LEVEL 20mA MAX For the 32 Volt Range vtvm3618 VOLT LEVEL 32V MIN vtvm3618 VOLT LEVEL 32V MAX Vilnt16 channelList This parameter specifies the channels for which the specified output level is to be configured Valid Range for each element vtvm3618 CHANNEL LIST MIN 1 to vtvm3618 CHANNEL LIST MAX 8 Vilnt16 numOfChannels This parameter specifies the number of valid elements in the input channelList array Valid Range vtvm3618 CHANNEL LIST MIN 1 to vtvm3618 CHANNEL LIST MAX 8 Return Values Returns VI SUCCESS if successful else returns error value Description This is an application function that shows how to group core driver functions to setup trigger parameters and output level for the specified channels kso sk se oe a se oie ake e ae oe oe ok oe o ae le 2 oe oe ake oe o a ie 2 ope e ae oe o 2 eoi ae e 2 oe oe afe oe o se ie 2 oe ae a oe o ski ake ae a 2 fe oe ake a 2 ae Ae ake ake e ae fe 2 ie ViStatus VI FUNC vtvm3618 setupAndWriteToDAC ViSession instrHnd
52. ers that may be included zero or more times A vertical bar read as or is used to separate parameter alternatives 22 VM3618 Programming www vxitech com SCPI COMMAND EXAMPLES CALIBRATION COUNT The Calibration Count query returns the number of times the VM3618 module has been calibrated CALibration COUNt There are no parameters for this command EXAMPLES CAL COUN Returns the number of times the VM3618 20 has been calibrated CAL1 GAIN 0 9000 Programming Channel 1 s gain constant CAL1 ZERO 220 Programming Channel 1 s offset constant CAL STORE Storing the calibration constants into the non volatile memory CAL COUN Returns the number of times the VM3618 21 has been calibrated VM3618 Programming 23 VXI Technology Inc CALIBRATION GAIN The Calibration Gain command is used to set the calibration constant for the gain of the selected channel its effect is immediate CALibration lt channel gt GAIN value Where channel is the channel to be calibrated Where value is the selected channels gain to be programmed EXAMPLES CAL1 GAIN 1 000000 Programming Channel I s gain constant as 1 000000 CAL1 GAIN Returns the current calibration constant 1 000000 from the non volatile memory 24 VM3618 Programming www vxitech com CALIBRATION SECURE CODE The Calibration Secure code command is used to set the calibration security code that protects the non volatile me
53. esesseserse 20 Miotto ienai ai ea iaai 107 keywOoId hene e a EE 20 21 TRIGger SEQuence SLOPe 57 94 TRIGger SEQuence SOURCce aie 1395 TRIGger SEQuence IMMediate 57 93 VM3618 Theory of Operation 111 V V MIP is sebbene EEN voltage range voltage T ference 2e ene IDEs 109 VXIDUS atte price HC RET eret 12 13 20 W word serial commande 107 word setial Query 3 d st ise elek eie 107 VXI Technology Inc 112 VM3618 Index
54. ethods 1 Trigger source from the front panel input This input is TTL compatible and is edge sensitive The unit may be programmed to trigger on either the rising or the falling edge of this signal 2 Trigger source from the VXI TTL trigger bus Any one of the eight TTL trigger bus lines may be selected as the trigger source The unit may be programmed to trigger on either the rising or the falling edge of this signal 3 Trigger upon receipt of a word serial command When this mode is selected the DACs will transmit when a word serial command is received by the instrument The trigger event causes all enabled channels to convert simultaneously The calibration constants used to correct the data values are stored in non volatile memory The constants are determined when the instrument is calibrated and can be changed as necessary such as during routine calibration cycles or when the user selects a new gain setting and wishes to set the gain accurately The constants may also be queried at any time via a word serial query and altered via a word serial command All calibration is done using calibration DACs to adjust the gain and offset of each channel This eliminates the need for removing covers from the unit and allows for automated calibration INTERFACE AND CONTROL FPGA The interface FPGA controls all functions needed to interface with the VMIP host The interface FPGA receives addresses and data from the VMIP bus for enabling and load
55. f the command Query Parameters Describes the parameters sent with the command and their legal range The default parameter values are assumed the same as in the command form unless described otherwise Query Response Describes the format of the query response and the valid range of output Description Describes in detail what the command does and refers to additional sources Examples Present the proper use of each command and its query when available Related Commands Lists commands that affect the use of this command or commands that are affected by this command 60 VM3618 Command Dictionary www vxitech com IEEE 488 2 COMMON COMMANDS CLS Purpose Clear the Status Register Type IEEE488 2 Common Command Command Syntax CLS RO oO PI Be SCENE None RST Value RST performs all the functions of CLS Query Syntax None Command Only Query Parameters N A Query Response N A Description This command clears all event registers clears the OPC flag and clears all queues except the output queue Examples Command Query Response Description Related Commands VM3618 Command Dictionary 61 VXI Technology Inc ESE Purpose Set the Event Status Enable Register Type IEEE488 2 Common Command Command Syntax ESE lt mask gt Oe BR EEn SC lt mask gt numeric ASCII value in the r
56. g operations have completed Specifically the operations of connecting or disconnecting channels ROUTe CLOSe or ROUTe OPEN and changing ranges require relay operations When a relay changes the operation is not complete until the relay has had time to settle Examples Command Query Response Description OPC OPC Related Commands VM3618 Command Dictionary 65 VXI Technology Inc RST Purpose Reset the module to a known state Type IEEE488 2 Common Command Command Syntax RST OO EIN eel None RST Value N A Query Syntax None Command Only Query Parameters N A Query Response N A Description The Reset command resets the module s hardware and software to a known state See the command tables at the beginning of this section for the default parameter values set by this command Examples Command Query Response Description RST Related Commands 66 VM3618 Command Dictionary www vxitech com SRE Purpose Set the Service Request Enable Register Type IEEE 488 2 Common Command Command Syntax SRE lt mask gt Oe Cw EISE SC lt mask gt Numeric ASCII value in the range of 0 to 255 RST Value N A Query Syntax SRE Query Parameters None Query Response Numeric ASCII value from 0 to 255 Description The Service Request Enable mask is used to control which bits in the statu
57. gt lt voltage_list gt Command Parameters lt index gt to 512 specifies the array element voltage list a list of 8 voltages RST Value 0 Query Syntax MEMory SETup lt index gt Query Parameters lt index gt 1 to 512 specifies the array element Query Response Voltage list separated by commas Description The Memory Setup command enters voltage levels into an array Each VM3618 channel has an associated 512 element memory array The same elements in all eight arrays are loaded at the same time from the supplied 8 element voltage list The query form of this command returns the voltages at position lt index gt for all DACs in their respective 512 element array The format is a set of voltages delimited by commas The reset value is zero all elements in the memory array are set to 0 volts Examples Command Query Response Description MEM SET 1 2 3 4 5 2 3 4 5 MEM SET 1 2 000122 2 999878 4 000244 5 000000 2 000122 2 999878 4 000244 5 000000 Related Commands SOURce VOLTage SETup lt index gt VM3618 Command Dictionary 79 VXI Technology Inc OUTPut TRIGger SLOPe Purpose Sets the polarity of the output trigger pulse Type Setting Command Syntax OUTPut TRIGger SLOPe lt slope gt ROT R VISIONE lt Slope gt POSitive NEGative RST Value NEG Query Syntax OUTPut TRIGger SLOPe Query Parameters None
58. hanges to the Non Vol memory It also returns the number of times Non Vol memory has been updated sk sk se oe sk se 2 ake e ae oe oe 2 oe o ae ie 2 oe e ok oe o oe sie 2 oe e a oe e 2 eoi spe e 2 oe oe ake oe o ae ie 2 oe a a oe o ski 2 fe a 2 fe oe spool 2 ake ae a fe 2 ie ViStatus VI FUNC vtvm3618 calibrateInstrument ViSession instrHndl Vilnt16 channelNumber ViReal32 gainVal Vilntl6 offsetVal ViChar password ViBoolean storeDontstore ViPInt32 count Variable used to store the return status of the function ViStatus status VI NULL status vtvm3618 calibrateOffsetGain instrHndl password channelNumber gainVal offsetVal if status lt VL SUCCESS return vtvm3618 ERROR CALIBRATE OFFSET GAIN status vtvm3618 invalidIntegerRange storeDontstore vtvm3618 DONT STORE vtvm3618 STORE VI ERROR PARAMETER if status VI SUCCESS return status if storeDontstore vtvm3618 STORE 1 status vtvm3618 storeCalibrationData 1nstrHndl password count If status VI SUCCESS return vtvm3618 ERROR STORING CAL DATA j retum VI SUCCESS j VM3618 Programming www vxitech com EEEE EEEE EE EEEE EEE EEEE E EE kk kk kk kk kk kk kk Function Formal Parameters vtvm3618 setupAndWriteTODAC ViSession instrHndl A valid session handle to the instrument Vilnt16 triggerSource This parameter is used to select the Trigger Source Valid Range vtvm3618 TRIG SRC_AUTO vtvm361
59. ification string Type IEEE488 2 Common Command Command Syntax None Query Only S O iE BH GV N A RST Value N A Query Syntax IDN Query Parameters None Query Response ASCII character string Description The Identification query returns the identification string of the VM3618 module The response is divided into four fields separated by commas The first field is the manufacturer s name the second field is the model number the third field is an optional serial number and the fourth field is the firmware revision number If a serial number is not supplied the third field is set to 0 zero Examples Command Query Response Description DN VXI Technology Inc VM3816 0 1 00 The revision listed here is for reference only the response will always be the current revision of the instrument Related Commands 64 VM3618 Command Dictionary www vxitech com OPC Purpose Set the OPC bit in the Event Status Register Type IEEE488 2 Common Command Command Syntax OPC RO oO PI RIIT OC None RST Value RST removes any pending OPC request Query Syntax OPC Query Parameters None Query Response 1 Description The Operation Complete command sets the OPC bit in the Event Status Register when all pending operations have completed The Operation Complete query will return a 1 to the output queue when all pendin
60. ines 16 volts All channels open Off N A programmed into the 16 bit DAC VM3618 Command Dictionary www vxitech com TABLE 4 3 SCPI REQUIRED COMMANDS Command Description RST Reset Value STATus OPERation CONDition Query the Operation Status Condition x STA Tus OPERation ENABle STATus OPERation EVENt STA Tus PRESet Presets the Status Register X STATus QUEStionable CONDition Query the Questionable Status Condition Register STATus QUEStionable ENABle Sets the Questionable Status Enable Register STATus QUEStionable EVENt Query the Questionable Status Event Register SYSTem ERRor Query the Error Queue Clears queue SYSTem VERSion Query which version of the SCPI standard N A the module complies with VM3618 Command Dictionary VXI Technology Inc COMMAND DICTIONARY The remainder of this section is devoted to the actual command dictionary Each command is fully described on its own page In defining how each command is used the following items are described under each command page Purpose Describes the purpose of the command Type Describes the type of command such as an event or setting Command Syntax Details the exact command format Command Parameters Describes the parameters sent with the command and their legal range Reset Value Describes the values assumed when the RST command is sent Query Syntax Details the exact query form o
61. ing the DACs see Figure 5 2 The interface and control FPGA enables the DAC enable decoders to decode address bits 1 4 The outputs of the DAC enable decoders DACENABLE are routed to the specified DACs The interface and control FPGA provides the HI byte HBENA and LO byte LBENA enable signals that are used in loading the DACs Data bits 0 15 are placed on the data bus by the VMIP host The interface and control FPGA will then output a LBENA signal to the data buffer mux and to all DACs This causes the data buffer mux to output data bits 0 7 DBO 7 to all DACs and the enabled DACs to latch in the data The interface and control FPGA will then output a HBENA signal to the data buffer mux and to all DACs This causes the data buffer mux to output data bits 8 15 DBO 7 to all DACs and the enabled DACs to latch in the data The interface FPGA also contains the trigger logic that monitors the VXI backplane TTL trigger the external trigger and internal trigger lines The interface and control FPGA will select which of the 8 VXI TTL trigger lines are to be used The FPGA will output to the trigger mux three select lines that are decoded by the trigger mux An external trigger line from the front panel is routed directly to the FPGA and does not go through the trigger multiplexer The interface FPGA will determine which edge of the desired trigger is to be used based on the users programming The interface and control FPGA will initiate an UPDAT
62. is grounded through the grounding conductor of the power cord To avoid 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 an explosive atmosphere Operate or store only in specified temperature range Provide proper clearance for product ventilation to prevent overheating DO NOT operate if any damage to this product is suspected Product should be inspected or serviced only by qualified personnel Improper Use The operator of this instrument is advised that 1f the equipment is used in a manner not specified in this manual the protection provided by the equipment may be impaired Conformity is checked by inspection 10 VM3618 Preface www vxitech com SUPPORT RESOURCES Support resources for this product are available on the Internet and at VXI Technology customer support centers VXI Technology World Headquarters VXI Technology Inc 2031 Main Street Irvine CA 92614 6509 Phone 949 955 1894 Fax 949 955 3041 VXI Technology Cleveland Instrument Division VXI Technology Inc 7525 Granger Road Unit 7 Valley View OH 44125 Phone 216 447 8950 Fax 216 447 8951 VXI Technology Lake Stevens Instrument Division VXI Technology Inc 1924 203 Bickford Snohomish WA 98290 Phone 425 212 2285 Fax 425 212 2289 Technical
63. ith these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Service should only be performed by qualified personnel TERMS AND SYMBOLS These terms may appear in this manual WARNING Indicates that a procedure or condition may cause bodily injury or death CAUTION Indicates that a procedure or condition could possibly cause damage to equipment or loss of data These symbols may appear on the product ATTENTION Important safety instructions ae Frame or chassis ground WARNINGS Follow these precautions to avoid injury or damage to the product Use Proper Power Cord To avoid hazard only use the power cord specified for this product Use Proper Power Source To avoid electrical overload electric shock or fire hazard do not use a power source that applies other than the specified voltage Use Proper Fuse To avoid fire hazard only use the type and rating fuse specified for this product VM3618 Introduction 9 VXI Technology Inc WARNINGS CONT Avoid Electric Shock To avoid electric shock or fire hazard do not operate this product with the covers removed Do not connect or disconnect any cable probes test leads etc while they are connected to a voltage source Remove all power and unplug unit before performing any service Service should only be performed by qualified personnel Ground the Product This product
64. l Vilnt16 triggerSource ViBoolean slope ViReal32 outputLevel Vilnt16 channelList Vilnt16 numOfChannels 50 VM3618 Programming www vxitech com ViStatus status VI NULL Ka Configuring the trigger parameters Si status vtvm3618 configTriggerParams instrHndl triggerSource slope if status VI SUCCESS return vtvm3618 ERROR SETTING TRIGGER PARAMS Configuring the output voltage current levels for the specified channels Wi status vtvm3618 setupOutputLevel instrHndl outputLevel channelList numOfChannels if status lt VI SUCCESS return vtvm3618 ERROR SETTING OUTPUT LEVEL return VI SUCCESS Ikki kk kk EEE EEE kk kk kk kk kk kk kk kk kk Function vtvm3618 setupScanListParams Formal Parameters ViSession instrHndl A valid session handle to the instrument Vilnt16 channel This parameter specifies the channel for which the scan list operation mode is to be set Valid Range vtvm3618 CHANNEL LIST MIN 1 to vtvm3618 CHANNEL LIST MAX 8 Vilnt16 mode This parameter specifies the mode of operation to be set for the scan list operation for the specified channel Valid Range Interpretation vtvm3618 SCAN MODE OFF Scan Mode Off vtvm3618 SCAN MODE ON Scan Mode On vtvm3618 SCAN MODE LOOP Scan Mode Loop Vilnt16 count This parameter specifies the position in the scan list array where the interrupt routine loading the DACs should either stop or loop back to zero In oth
65. logy Inc TRIGger SEQuence SOURce Purpose Selects the trigger event which updates the DACs on the VM3618 Type Instrument specific SCPI Command Syntax TRIGger SEQuence SOURce lt source gt RER WEINE lt Source gt IMMediate AUTO EXTernal INTernal lt n gt TTLTrig lt n gt RST Value AUTO Query Syntax TRIGger SEQuence SOURce Query Parameters None Query Response IMM AUTO EXT INT 1 8 TTLT 0 7 Description The Trigger Sequence Source command sets the trigger source for the instrument Each DAC is double buffered Therefore writing to the DAC source voltage data or source voltage level will require a second event to cause the output voltage to be updated This command selects the source of the update event When using SCAN an EXTernal trigger source or one of the TTLTriggers is required This command is used to select that source The following describes each source parameter IMMediate All outputs update when this command is processed This is useful for updating the output voltage for all channels simultaneously AUTO A DAC output is immediately updated when the channel is programmed The second event is not required to update the output voltage EXTernal Selects the front panel trigger input and all channels are updated all other channels wait for the selected channel to update INTernal lt n gt All outputs are updated when the sel
66. mory for unauthorized access This code must be specified in order to disable the calibration security CALibration SECure CODE lt code gt Where lt code gt is the calibration security code to be set This parameter must be specified in definite or indefinite length arbitrary block format EXAMPLES CAL SEC CODE 150LIVE CAL SEC STAT OFF 150LIVE CAL SEC CODE s150LIVE Programs the calibration security code as OLIVE Disable the calibration security Returns the current calibration security code The query can be performed only when the calibration security has been currently disabled VM3618 Programming 25 CALIBRATION SECURE STATE VXI Technology Inc The Calibration Secure State command is used to enable or disable the calibration security state CALibration SECure STATe lt mode gt lt code gt Where mode specifies whether the security is to be enabled or disabled Where code is the calibration security code EXAMPLES CAL SEC STATE ON CAL SEC STAT 1 CAL SEC STATE OFF 150LIVE CAL SEC STAT 0 Enables the calibration security The security code is not required in order to enable the security state Returns the current calibration security state Disables the calibration security The security code is required in order to disable the calibration security If the password is incorrect an error is returned Returns the current calibration security State
67. n sen enses entes ense etre e tense eene nn en 108 Reference and Calibrations c dh decern eroe e etre etude dh wh tee ieu 110 eeececccececececececececececececececececee VM3618 Introduction 5 VXI Technology Inc CERTIFICATION VXI Technology Inc VTI certifies that this product met its published specifications at the time of shipment from the factory VTI further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY The product referred to herein 1s warranted against defects in material and workmanship for a period of three years from the receipt date of the product at customer s facility The sole and exclusive remedy for breach of any warranty concerning these goods shall be repair or replacement of defective parts or a refund of the purchase price to be determined at the option of VTI For warranty service or repair this product must be returned to a VXI Technology authorized service center The product shall be shipped prepaid to VTI and VTI shall prepay all returns of the product to the buyer However the buyer shall pay all shipping charges duties and taxes for products returned to VTI from another country VTI warrants that its software and fi
68. nd Query CAL1 ZERO 115 CAL1 ZERO 115 Related Commands CALibration lt channel gt GAIN lt value gt CALibration DATA lt block data gt VM3618 Command Dictionary 77 VXI Technology Inc INHOUSE PSEUDO Purpose Controls the use of the register interface Type Setting Command Syntax INHOUSE PSEUDO lt boolean gt ONEC E EIEIO boolean 0 1 OFF ON RST Value N A Query Syntax INHOUSE PSEUDO Query Parameters N A Query Response ASCII numeric 0 or 1 Description In House Pseudo set true says to use the pseudo register interface Pseudo set false says to use the hardware register interface The value set takes effect next time the unit powers up it does not take effect immediately While pseudo register access is slower than direct register access about 40 us compared to 0 5 us the module performs the offset and scale associated with the calibration constants Pseudo register access also allows register read back The value read back from a register is the value stored in the DAC after the offset and scale operation Examples Command Query Response Description INHOUSE PSEUDO 1 INHOUSE PSEUDO Related Commands 78 VM3618 Command Dictionary www vxitech com ME Mory SETup Purpose Enter a voltage list for manual loading Type Instrument specific SCPI Command Syntax MEMory SETup lt index
69. nel list Where index is a value in the range 1 to 512 which specifies the location in the specified channel s scan list from where the value is to be loaded to the DAC EXAMPLES SOUR SET 1 Q 1 8 SCAN TABL 11 2 3 4 5 SOUR SET 3 Q 1 Loads all the 8 DACs with the value from the respective scan lists at index 1 Loads the scan list of Channel 1 with the specified values Loads the DAC 1 with the value from the scan list of Channel I at index 3 In other words the DAC voltage of Channel 1 is 2 999878 volts 38 VM3618 Programming www vxitech com SOURCE VOLTAGE LEVEL The Source Voltage Level command sets the output voltage level of the specified channels This command can be used for only those channels that are operating on the voltage range If this command is used on channels operating on the current range an error is generated SOURce VOLTage LEVel lt value gt lt channel_list gt Where lt value gt specifies the output voltage level that is to be set for the specified channels The range for this parameter depends on the range in which the specified channels are operating Where lt channel_list gt specifies the channels for which the output voltage level is to be configured It must be ensured that the channels specified in this list are operating on the voltage range otherwise an error will be generated For more details on the syntax of the channel list see Section 4 EXAMPLES SO
70. ng Channel 2 to operate on the 20 mA range Connecting the outputs of Channels 1 and 2 to their front panel connectors Setting Channel 1 s voltage level to 10 1 V Setting Channel 2 s current level to 2 1 mA VM3618 Programming 43 VXI Technology Inc REGISTER ACCESS EXAMPLES This instrument can be programmed through the registers as well as through word serial commands The programming registers are in the A16 address space All registers are write only registers in the real register mode and read write in the pseudo register mode Register offsets from the base address are shown in the following table The base of the registers is set by the logical address of the instrument BASE ADDRESS 49152 logical address 64 For example a logical address of 8 means the base address is 49152 8 64 49664 C200 in hex To set a value for Channel 1 store the 16 bit binary value at offset 20 hex A value of 123 007B hex will cause Channel 1 to go to that value on the corresponding DAC The actual value set depends on the selected range for that channel The full 16 bit value can be used to program the voltage ranges The 20 mA to 20 mA range uses only 15 bits Here are some examples Hex Value 10 V 16 V 20 V 32 V 20 mA FFFF 9 999695 15 999512 19 999695 31 999512 N A FFFE 9 999390 15 999023 19 999390 31 999023 N A C001 5 000305 8 000488 15 000305 24 000488 N A C000 5 000000 8 000000 15 000000 24 00000
71. nnel list 1 2 3 4 5 6 7 8 RST Value 0 Query Syntax SOURce VOLTage LEVel lt channel gt Query Parameters channel list 2 1 2 3 4 5 6 7 8 Query Response The range for the value parameter depends on the range selected Description The Source Voltage Level command sets the voltage level for the instrument Note that the correct range must first be selected The voltage input parameter is converted to a 16 bit binary representation used to program the 16 bit DACs A RST sets all channels to 0 volts on the 16 volt range Examples Command Query Response Description VOLT LEV 10 1 2 3 Loads Channels 1 2 and 3 VOLT LEV 3 10 000000 Related Commands 92 VM3618 Command Dictionary www vxitech com SOURce SETup Purpose Set the output level of all channels using the binary data from a selected location in the scan list Type Instrument specific SCPI Command Syntax SOURce SETup lt index gt Ones ewes lt index gt 1 to 512 RST Value N A Query Syntax None Command Only Query Parameters None Query Response None Description The Source Setup command loads the DAC from the memory list rather than from an embedded value in an instrument SCPI command such as SOURce VOLTage DATA or from the scan list which loads from the interrupt routine Examples Command Query Response Description MEM SET 1 2 3 4 5 SOUR SET 1 R
72. ocation command allows the value at a specific location in the scan list to be modified or queried Examples Command Query Response Description SCAN TABLI LOC 2 4 SCAN TABLI LOC 2 4 000244 Related Commands SCAN MODE lt mode gt lt channel_list gt SCAN TABLe channel value list VM3618 Command Dictionary 89 VXI Technology Inc SOURce CURRent LEVel Purpose Set the output current level of the channels selected by the channel list Type Instrument specific SCPI Command Syntax SOURce CURRent LEVel lt value gt lt channel_list gt OHM lt Value gt 20 0 to 19 998779 lt channel_list gt 1 2 3 4 5 6 7 8 RST Value 0mA Query Syntax SOURce CURRent LEVel channel Query Parameters channel 2 1 2 3 4 5 6 7 8 Query Response 20 0 to 19 998779 Description The Source Current Level command sets the output current level for a specified channel The lt value gt parameter is converted to a 16 bit binary representation used to program the 16 bit DAC Examples Command Query Response Description CURR 10 1 2 3 Loads Channels 1 2 and 3 CURR 3 10 000000 Related Commands 90 VM3618 Command Dictionary www vxitech com SOURce DATA Purpose Set the output level of the channels selected by the channel list using the binary data programmed into the 16 bit DAC Type Instrument s
73. our voltage range settings are available on the VM3618 two bipolar 10 V 16 V and two unipolar 0 20 0 32 The output pin is referenced to different reference pins depending on the range selected The 20 mA current range operates per the bipolar configuration When a unipolar range is used the OUTPUTx pin must be referenced to the RETURN pin and in a bipolar range the output pin must be referenced to the GNDx pin where x refers to the channel number As an example to get a range out of channel 1 OUTPUTI pin 1 must be referenced to RETURNI pin 31 Likewise to get a range of 10 V on channel 1 OUTPUTI pin 1 must be referenced to GND pin 16 These are floating outputs GND pins e g pins 15 30 and 44 are tied to chassis ground and can be used as shields MATING CONNECTORS The mating connector for the VM3618 is available from the following company Assmann Electronic Inc P N AHDS44LL T Mating Connector 20 VM3618 Preparation for Use www vxitech com SECTION 3 PROGRAMMING INTRODUCTION The VM3618 is a VXIbus message based device whose command set is compliant with the Standard Command for Programmable Instruments SCPI programming language All module commands are sent over the VXIbus backplane to the module Commands may be in upper lower or mixed case All numbers are sent in ASCII decimal unless otherwise noted The module recognizes SCPI commands SCPI is a tree structured langu
74. pecific SCPI Command Syntax SOURce DATA lt value gt lt channel_list gt OHNO RETTEN lt value gt 32 768V to 32 767V 16384 to 16383 in 20 mA current range lt channel_list gt 1 2 3 4 5 6 7 8 RST Value 0 Query Syntax SOURce DATA lt channel gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response 32 768 V to 32 767 V 16384 to 16383 in 20 mA current range Description The Source Data command programs the 16 bit DAC with the binary value specified For example a binary value of 32768 would translate into a voltage level of 16 volts on the 16 volt range The range for the value parameter is from 32 768 to 32 767 for all voltage ranges and from 16384 to 16383 for the 20 mA current range A RST sets all channels to 0 volts on the 16 volt range Examples Command Query Response Description DATA 8191 1 2 3 Loads Channels 1 2 and 3 DATA 3 8191 DATA 16384 Q 7 10 Loads Channels 7 8 9 and 10 Related Commands SOURce VOLTage LEVel SOURce CURRent LEVel VM3618 Command Dictionary 91 VXI Technology Inc SOURce VOLTage LEVel Purpose Set the output voltage level of the channels selected by the channel list Type Instrument specific SCPI Command Syntax SOURce VOLTage LEVel lt value gt lt channel_list gt TO een lt Value gt The range for the value parameter depends on the range selected cha
75. polar 0 20 0 32 The output pin is referenced to different reference pins depending on the range selected The 20 mA current range operates per the bipolar configuration When a unipolar range is used the OUTPUTX pin must be referenced to the RETURN pin and in a bipolar range the output pin must be referenced to the GNDx pin where x refers to the channel number As an example to get a range out of channel 1 OUTPUTI pin 1 must be referenced to RETURNI pin 31 Likewise to get a range of 10 V on channel 1 OUTPUTI pin 1 must be referenced to GND pin 16 These are floating outputs GND pins e g pins 15 30 and 44 are tied to chassis ground and can be used as shields Examples Command Query Response Description RANG 32V Q2 Sets Channel 2 to operate on the 0 to 32 volt range RANG 2 32V Indicates that Channel 2 is set to the 0 to 32 volt range Related Commands VM3618 Command Dictionary 83 VXI Technology Inc ROUTe CLOSe Purpose Connect one or more channels with their output pins Type Instrument specific SCPI Command Syntax ROUTe CLOSe channel list SEG E EEn channel list gt 1 2 3 4 5 6 7 8 Reset Value RST sets all channels open Query Syntax ROUTe CLOSe lt channel gt Query Parameters lt channel gt 1 2 3 4 5 6 7 8 Query Response 1 0 1 close 0 open Description The Route Close command connects the indic
76. ption TST None 70 VM3618 Command Dictionary www vxitech com WAI Purpose Halts execution and queries Type IEEE488 2 Common Command Command Syntax WAI RO oO PI Be OC None RST Value N A Query Syntax None Command Only Query Parameters N A Query Response N A Description The Wait to Continue command halts the execution of additional commands and queries until the No Operation Pending message is true This command makes sure that all previous commands have been executed before proceeding It provides a way of synchronizing the module with its commander Specifically the operations of connecting or disconnecting channels ROUTe CLOSe or ROUTe OPEN and changing ranges require relay operations When a relay changes the operation is not complete until the relay has had time to settle Examples Command Query Response Description WAI Related Commands VM3618 Command Dictionary 71 VXI Technology Inc INSTRUMENT SPECIFIC SCPI COMMANDS CALibration C OUNt Purpose Query the number of times the VM3618 has been calibrated Type Instrument specific SCPI Command Syntax None Query Only ODMENE EIEIO GV N A RST Value N A Query Syntax CALibration COUNt Query Parameters None Query Response Numeric ASCII value Description The instrument will increment
77. rmware designated by V TI for use with a product will execute its programming when properly installed on that product VTI does not however warrant that the operation of the product or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The warranty shall not apply to defects resulting from improper or inadequate maintenance by the buyer buyer supplied products or interfacing unauthorized modification or misuse operation outside the environmental specifications for the product or improper site preparation or maintenance VXI Technology Inc shall not be liable for injury to property other than the goods themselves Other than the limited warranty stated above VXI Technology Inc makes no other warranties express or implied with respect to the quality of product beyond the description of the goods on the face of the contract VTI specifically disclaims the implied warranties of merchantability and fitness for a particular purpose RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the Government is subject to restrictions as set forth in subdivision b 3 11 of the Rights in Technical Data and Computer Software clause in DFARS 252 227 7013 VXI Technology Inc 2031 Main Street Irvine CA 92614 6509 U S A 6 VM3618 Preface www vxitech com DECLARATION OF CONFORMITY Declaration of Conformity According to ISO IEC Guide 22 and EN 45014 MANUFACTURER S NAME VXI Technology Inc M
78. s byte generate back plane interrupts Ifa bit is set in the mask that newly enables a bit set in the status byte and interrupts are enabled the module will generate a REQUEST TRUE event via an interrupt See the STB Command for the layout of bits Note Bit 6 is always internally cleared to zero as required by IEEE 488 2 section 11 3 2 3 Examples Command Query Response Description SRE 4 SRE Related Commands VM3618 Command Dictionary 67 VXI Technology Inc STB Purpose Query the Status Byte Register Type IEEE488 2 Common Command Command Syntax None Query Only Command Parameter N A RST Value N A Query Syntax STB Query Parameters None Query Response Numeric ASCII value from 0 to 255 Description The Read Status Byte query fetches the current contents of the Status Byte Register See the IEEE 488 2 specification for additional information regarding the Status Byte Register and its use The layout of the Status Byte Register is Bit 0 Unused Bit 1 Unused Bit 2 Error Queue Has Data Bit 3 Questionable Status Summary not used Bit 4 Message Available Bit 5 Event Status Bit ESB Bit 6 Master Summary Status Bit 7 Operation Status Summary Examples Command Query Response Description STB 16 Related Commands 68 VM3618 Command Dictionary www vxitech com TRG Purpose Causes a trigger event to occur
79. seudo register access also allows register read back The value read back from a register is the value stored in the DAC after the offset and scale operation The Model VM3618 D A Module supports access to the eight channels via the Device Dependent Registers of the VXIbus interface The specific registers are located in A16 Memory at offsets 0x20 Portl 0x22 Port2 0x24 Port3 0x26 Port4 0x28 Port5 0x2A Port6 0x2C Port 7 and Ox2E Port8 The following diagram shows A16 Memory and the Model VM3618 Data Port Map VM3618 Programming 45 TABLE 3 1 A16 MEMORY Offset Description 3E 3C 3A 38 36 34 32 30 2E Channel 8 2C Channel 7 2A Channel 6 28 Channel 5 26 Channel 4 24 Channel 3 22 Channel 2 20 Channel 1 1E 1C 1A 18 16 A32 Pointer Low 14 A32 Pointer High 12 A24 Pointer Low 10 A24 Pointer High E Data Low C Data High A Response Data Extended 8 Protocol Signal Register 6 Offset Register 4 Status Control Register 2 Device Type 0 ID Register VXI Technology Inc 46 VM3618 Programming www vxitech com VXIPLUG amp PLAY EXAMPLES Ikki kk kk kk kk kk kk kk kk kk kk kk Function Formal Parameters vtvm3618 calibrateInstrument ViSession instrHndl A valid session handle to the instrument Vilnt16 calibration Channel This parameter is used to select the channel for which the calibration constants are to be set Valid Range vtvm36
80. sh short and long form for the user As an example these commands are all correct and all have the same effect SOURce VOLTage LEVel value channel list source voltage level value channel list SOURCE VOLTAGE LEVEL value channel list SOUR VOLTage LEVel value channel list SOUR VOLT LEVel value channel list SOUR VOLT LEV value channel list sour voltlev value channel list VM3618 Programming 21 NOTATION VXI Technology Inc The following command is not correct because it uses part of the long form of SOU Ree but not all the characters of the long form sourc voltlev value channel list incorrect syntax edra c All of the SCPI commands also have a query form unless otherwise noted Query forms contain a question mark The query form allows the system to ask what the current setting of a parameter is The query form of the command generally replaces the parameter with a question mark Query responses do not include the command header This means only the parameter is returned no part of the command or question is returned Keywords or parameters enclosed in square brackets are optional If the optional part is a keyword the keyword can be included or left out Omitting an optional parameter will cause its default to be used Parameters are enclosed by angle brackets gt Braces or curly brackets are used to enclose one or more paramet
81. tem can provide adequate airflow at the specified backpressure It should be noted that if the chassis cannot provide adequate power to the module the instrument might not perform to specification or possibly not operate at all In addition if adequate cooling is not provided the reliability of the instrument will be jeopardized and permanent damage may occur Damage found to have occurred due to inadequate cooling will void the warranty on the instrument in question VM3618 Preparation for Use 17 VXI Technology Inc SETTING THE CHASSIS BACKPLANE JUMPERS Please refer to the chassis user manual for further details on setting the backplane jumpers SETTING THE LOGICAL ADDRESS The logical address of the VM4018 is set by a single 8 position DIP switch located near the module s backplane connectors this is the only switch on the module The switch is labeled with positions 1 through 8 and with an ON position A switch pushed toward the ON legend will signify a logic 1 switches pushed away from the ON legend will signify a logic 0 The switch located at position 1 is the least significant bit while the switch located at position 8 is the most significant bit See Figure 2 1 for examples of setting the logical address switch ah N ng SE osition alue ai hdd adul fna 12345678 12345678 1 1 SET TO 4 SET TO 8 2 2 3 4 4 8 ON ON 5 16 adu hh NNNWNNNNM 6 32 12345678 12345678 7 64 SET TO 168 SET TO 255 8 128 Dynamic FIG
82. the count every time the non volatile memory holding the calibration constants is updated If the calibration security is disabled CALibration SECure STATe OFF active and CALibration STORe AUTO ON is active the count will increment with each execution of the CALibration GAIN or CALibration ZERO command If the CALibration STORe AUTO OFF is active the count will only be incremented by invoking the CALibration STORe command The maximum value for the count is 16 777 215 after which it will wrap to 0 Calibration commands should only be executed by qualified personnel Changing these values incorrectly can cause the instrument to perform improperly Response Description 3 Examples Command Query CAL COUN Related Commands CALibration STORe 72 VM3618 Command Dictionary www vxitech com CALibration GAIN Purpose Set the calibration constant for the selected channel s gain Type Instrument specific SCPI Command Syntax CALibration lt channel gt GAIN lt value gt RER ellie lt channel gt 1 8 referring to a specific channel value 0to 1 0 RST Value Set to values stored in non volatile memory Query Syntax CALibration lt channel gt GAIN Query Parameters channel 1 8 referring to a specific channel Query Response A numeric ASCII floating point number from 0 000000 to 1 000000 Description If the CALibration STORe AUTO O
83. trigger sources outlined in the following section Both the setups and scan lists are loaded into RAM before their use All the DACs update synchronously and may be triggered to update via one of three sources 1 Trigger source from the front panel input This input is TTL compatible and is edge sensitive The unit may be programmed to trigger on either the rising or the falling edge of this signal 2 Trigger source from the VXI TTL trigger bus Any one of the eight TTL trigger bus lines may be programmed to trigger the update on either the rising or the falling edge of this signal 3 Trigger upon receipt of a word serial command When this mode is selected the DACs will convert when the instrument receives a word serial command The VM3618 may be programmed to output a trigger on the VXI TTL trigger bus when the DACs are updated The user may specify any one of the eight available trigger lines or may disable the function if not needed The calibration constants used by the VM3618 are stored in non volatile memory These constants are determined when the instrument is calibrated and can be changed as necessary such as during routine calibration cycles These constants may also be queried at any time via a word serial query and altered via a word serial command By querying the calibration constants the user may pre calibrate the data sent to the unit if the direct register based access method is being used to program the instrument
84. ts the code or password required for access to the calibration commands Calibration security must be disabled in order to change the code string Before shipping the instrument the factory sets the code to VM3618 The Query Only works if calibration security is disabled The code string must bel to 12 ASCII characters in length entered in IEEE 488 2 definite or indefinite length arbitrary block format Calibration commands should only be executed by qualified personnel Changing these values incorrectly can cause the instrument to perform improperly Response Description Examples Command Query CAL SEC CODE 16VM3618 CAL SEC CODE 16VM3618 Returns the currently set security code assuming calibration has been disabled Related Commands CALibration SECureSTATe lt mode gt lt code gt 74 VM3618 Command Dictionary www vxitech com CALibration SECure STATe Purpose Enable or disable calibration security Type Instrument specific SCPI Command Syntax CALibration SECureSTATe lt mode gt lt code gt RTE RN Ivo lt mode gt 0 1 ON OFF lt code gt 1 to 12 ASCII character string RST Value 1 Query Syntax CALibration SECure STATe Query Parameters None Query Response 1 0 Description The calibration constants may not be changed or saved while the CALibration SECure STATe is ON The query returns the current mod
85. us ec 65 PRS T ve 66 PS RE eae eae es abcd nee Abe ot Tease St BAL ed Bae bess ied Mas Ma I Ble eet Ns hse TS A Ee rl ee A ete 67 RE NEEN 68 lucc nA 69 pabcdp m ms 70 WAT 71 Instrument Specific SCPI Commands sese en nennen enne erret 72 CAL bration e0 ON aeter etel pee ce pe ie Pre TORTE 72 CA Libration GAIN ae od tevin eR ea eed atu a de IUe rts 73 CALibration S ECure CODE zn een eA ete o Re ETE Ae a ERE AAS 74 CALaibration SECure STATe ied detecte ete RR e ve E ede aee Eee eene d 75 CALabration STOR inet recede e ede ee iE te eee ie feed 76 CALaibration ZERO 2 eere edere tete tede En eO a qu 77 INHOUSE PSEUDO wicket Ahh eiie oe Dagesrees am dasiedest 78 MEMO ry SE Doro 79 QOUTPUt TRIG ger SLOPE pL E 80 OUT Put TRIG g r TTL Trig icc ret ede e Te der de ede RA e Gee e d feed 81 OUTPut RN SKI ESTATE i st 5 date testet eet eet inn 82 RA NG 6 m EEE R P 83 ROUTE CLOSE c CE 84 ROUTS OPEN 2 ie Ea est t se ee Ri 85 NI WERETH 86 e MK R I EE 87 e E DN ENER 88 SCAN TEABEe LOCation iint EO ete ae re m a e erit tus 89 SOURCE CURR ent GEN los teo Re TRU UU RIED I wee NE IS A eR 90 SOURCE dp cg 91

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