Chapter 1 GENERAL The 2460 Series VXIbus Module
Contents
1. NN AMAA DROEN Figure 2 1 The installation of the 2460 Series VXIbus Module Installation Instructions 2 2 Before commencing installation of the 2460 Series VXI Module instrument carry out a visual inspection of it Pay particular attention to connectors P1 and P2 on the rear of the instrument and ensure that there are no bent damaged or missing pins any damage to the instrument should be repaired before proceeding Refer to the product identification label on the side of the module for system integration information relating to voltage power and cooling requirements to be supplied by the VXI chassis Switch S1 is used to set the Logical Address of the module to a static address or allow the controller to dynamically allocate an address The switch is marked for least significant bit LSB and MSB most significant bit and logic states 1 and O Static Logical Addresses may be set between the values 1 and 254 f S1 is set to 255 then the controller dynamically allocates the next available Logical Address The factory default is 254 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual EN BR M o o G uM 2d a o ge ee A LL HERE tee Ld M T a vw i 0 C v m E o Figure 2 2 Location of S1 To install the 2460 Series VXI Module in a C size VXI ma2. STRONICS TEST SYSTEMS RACAL INSTRUMENTS VXI MODULAR INSTRUMENTATION 2460 SERIES Publication No 980833 Rev A Astronics Test Systems Inc 4 Goodyear Irvine CA 92618 Tel 800 722 2528 949 859 8999 Fax 949 859 7139 atsinfo astronics com atssales astronics com atshelpdesk asironics com _http www astronicstestsystems com Copyright 1998 by Astronics Test Systems Inc Printed in the United States of America All rights reserved This book or parts thereof may not be reproduced in any form without written permission of the publisher THANK YOU FOR PURCHASING THIS ASTRONICS TEST SYSTEMS PRODUCT For this product or any other Astronics Test Systems product that incorporates software drivers you may access our web site to verify and or download the latest driver versions The web address for driver downloads is http www astronicstestsystems com support downloads If you have any questions about software driver downloads or our privacy policy please contact us at atsinfo astronics com WARRANTY STATEMENT All Astronics Test Systems products are designed to exacting standards and manufactured in full compliance to our AS9100 Quality Management System processes This warranty does not apply to defects resulting from any modification s of any product or part without Astronics Test Systems express written consent or misuse of any product or part The warranty also does not apply to fuses software non recharge
3. Disables the time out Initialization 10 seconds Examples The following example waits 10 seconds for a scalar type UCT frequency measurement triggered by a TTL Trigger line SYST TIM 10 INST SEL COUN1 Programming the 2461 Module 4 14 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual CONF FREQ ARM START SOUR TTLTRG7 READ Waits a maximum of 10 seconds The following example waits 2 seconds for an array type UCT frequency measurement to complete 5 readings SYST TIM 2 INST SEL COUN1 MEAS ARRAY FREQ 5 Waits maximum of 100 seconds Only 2 of the 5 measurements are armed and completed lt 00003 9862505E 00 00003 9862505E 00 9 90000000000E 37 9 90000000000E 37 9 90000000000E 37 gt Interrogative form SYSTem TlMeout lt integer gt Queries the programmed time out Astronics Test Systems Programming the 2461 Module 4 15 2460 Series User Manual Publication No 980833 Rev A Common commands IEEE 488 2 common command summary Clears all Event register and Error queue Sets the contents of the Standard Event Enable Register Request the programmed value of the Standard Event Enable Register Request the programmed value of the Standard Event Status Register and clears it Request the manufacturer model number serial number and firmware revision of the module Sets the Operation Complete bit in the Standard Event Status Register after all pendi
4. Read the contents of the Service Request Enable Register STB gt numeric value Description Read the contents of the Status Byte Register A description of this register is shown in Figure 4 2 The EAV MAV ESB and OSB bits are set by other event registers and queues Bit 6 SRQ MSS sets when one or more enabled conditions occur The STB command does not clear the Status Byte Register This register can only be cleared by clearing the related registers and queues kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Astronics Test Systems Programming the 2461 Module 4 23 2460 Series User Manual Publication No 980833 Rev A TST gt lt result gt Description Execute a self test on the module and returns the result This command connects the standard frequency in use to the counting input and takes frequency measurements Both UCT boards are tested The test fails if the frequency measurement differs from 10MHz Result 0 Tests passed 1 Self test failure application board 1 2 Self test Failure application board 2 3 Self test Failure application board 1 and 2 Examples TST gt 3 Self test Failure in application board 1 and 2 TST gt 0 Tests passed TST gt 1 Self test Failure in application board 1 TRG Description It causes the UCT to switch from the ldle to the Initiated state If the Manual Totalize function is currently selected the TRG command switches the s
5. 4 Set QYE B2 of enable register 8 Set DDE B3 of enable register 16 Set EXE B4 of enable register 32 Set CME B5 of enable register The sum of the decimal weights of the bits that you wish to be set is the value that is sent with the ESE command For example to set the CME and QYE bits of the Standard Event Enable Register send the following command ESE 36 where CME bit B5 Decimal 32 Astronics Test Systems Programming the 2461 Module 4 19 2460 Series User Manual Publication No 980833 Rev A QYE bit B2 Decimal 4 parameter 36 Initialization Power up Clears register CLS No effect RST No effect STATus PRESet No effect ESE gt lt numeric_value gt Description Returns the programmed value of the Standard Event Enable Register This command does not clear the Standard Event Status Enable Register Refer to Figure 4 3 ESR gt lt numeric_value gt Description Returns the programmed value of the Standard Event Status Register A set bit in this register indicates that a particular event has occurred For example for an acquired decimal value of 48 the binary equivalent is 00110000 For the binary value bits B4 and B5 of the Standard Event Status Register are set These set bits indicate that a device dependent error and a command error have occurred This command clears the Standard Event Status Register Refer to Figure 4 3 Initialization Programming the 2461 Module 4 20 Astroni
6. Astronics Test Systems lts design was developed to reduce VXlbus Module the size and cost of test systems by allowing more than one function in a single VXIbus module merurernts Ed o0000 e e EK Zo Figure 1 1 The 2460 Series VXIbus Module Astronics Test Systems General 1 1 2460 Series User Manual Publication No 980833 Rev A o O O o Function Card Slot Position Function Card Slot Position 3 O o e O O o O Function Card Slot Position 9 O o E O 5 VXI Interface Figure 1 2 The 2460 VXIbus Module lari n The 2460 Series VXlbus Module will allow up to 3 separate Modu al ly and function cards to be fitted in a single C size slot Slot or positions Flexibility 1 and 2 provide access to the front panel while slot position 3 Cost Effective Field Upgradable General 1 2 allows for future development or enhancements In some applications this will allow the user to expand or reduce the number of modules cards with in an existing system Additionally fewer modules within a VXI chassis will allow a user to choose a six slot chassis instead of a standard thirteen slot chassis 2460 Series are field upgradable The function cards are automatically recognized when installed by the firmware Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Chapter 2 INST
7. Driver 3 3 2460 Series User Manual Publication No 980833 Rev A The Setting displays the System Time out The Time out setting specifies the maximum time a query such as MEAS or READ can take before an error is generated A value of 0 disables the time out Information Only displays the SCPI version year specifies the SCPI version to which the instrument conforms The System Error displays Error Number It specifies the error code of the most recent Error Message generated by the 2461 If more than one error is present in the queue a Next control may be operated successively until no more errors are available The Apply command button initiates the change to the Time out setting The Close command button closes the panel The Status window displays the status byte refer to Chapter 4 page 4 17 Figure 4 2 2461 Instrumentation System Status Byte 000000900 Bt 6543210 Close Figure 3 3 Status The Self test returns the result as a text message Note that the self test checks all function cards installed in the 2461 module B Self test Result ES Self Tests Passed Figure 3 4 Self Test Operation of the 2461 Via the VXIplug amp play Driver 3 4 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual bout 2461 2461 Instrumentation System plug amp play AAA AAA AAN Soft Front Panel Instrument Driver VISA LabWindows C Serial Number Firmware Revis
8. Event Resp Event Mode Mode Status Fig 746 Val Resp Val Event Resp Mode Event Mode Astronics Test Systems This field indicates the status of command execution The command has executed correctly The command did not execute A required option was not supported A zero 0 enables reply generation A one 1 disables reply generation A zero 0 enables event generation A one 1 disables event generation A one 1 indicates that responses can be sent as signals indicates that responses can be sent as interrupts A zero 0 A one 1 indicates that events can be sent as signals A zero 0 indicates that events can be sent as interrupts Programming the 2461 Module 4 31 2460 Series User Manual Publication No 980833 Rev A Begin Normal Operation This command tells the instrument it can execute a normal operational cycle Command FCFF or FDFE46 The response is placed in the Data Low Register Response EFFE Byte Available A master uses this command to send a byte of data to the slave The END field indicates the last byte of the message Command 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 p fo p fi ft ft o eno AST Response No response Programming the 2461 Module 4 32 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Byte Request The master uses this command to receive a data byte from a slave instrument Command
9. The 2460 Series VXlbus Module AAA 1 1 Figure 1 2 The 2460 VXIbus Module AANEREN 1 2 Figure 2 1 The installation of the 2460 Series VXlbus Module 2 2 FiqUre 2 2 Location AST sarria eO Wa diia artis is 2 3 Figure 3 1 Main Soft Front Panel of the 2461 application oooooncccccccccnnncicnnncononcccnnnccnnananannccnnnnos 3 2 Figure 3 2 System Functions secondary Panel of the 2461 application 3 3 Figure 3 3 MAS ida 3 4 Figure 3 4 Sell TOSL ipee er oit aite bate ertet ds 3 4 Figure 3 5 About secondary Soft Front Panel of the 2461 application 3 5 Figure 4 1 Operation Status Register ANEN 4 10 Figure 4 2 Status Byte and Service Request kee 4 17 Figure 4 3 Standard Event SAUS sero tol exor do teda aerei 4 18 iv Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual DOCUMENT CHANGE HISTORY Revision Date Description of Change Revised per EO 29469 Revised format to current standards Company A 11 18 08 name revised throughout manual Manual now revision letter controlled Added Document Change History Page v Astronics Test Systems 2460 Series User Manual Publication No 980833 Rev A This page was left intentionally blank vi Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Chapter 1 GENERAL The 2460 Series The 2460 series is based on an innovative module produced by
10. an END bit set and a Line Feed appended provided the END bit is set when sending the Line Feed To receive a message from the 2461 the word serial command byte request command should be used The previous message sent must have contained at least one query command For each byte request command a single word is read by the controller containing one byte of reply data This repeats until the end bit in the response from the 2461 is set The 2461 general command set is available at all times This includes the commands to interrogate which cards are installed and to select which card is to be addressed next To determine which application cards are installed the operator should send INST CAT If two UCT application cards are fitted the reply will be COUNter1 COUNter2 To select counter 2 card located at the lower end of the front panel the operator should send INST SEL COUNter2 The command set for card 2 a counter is now enabled Programming the 2461 Module 4 4 Astronics Test Systems Publication No 980833 Rev A Status and Error Reporting System Timeout Astronics Test Systems 2460 Series User Manual Status and error reporting commands fall within the general command set so these can be accessed at any time Status and set up of the status system is done by the STATUS subsystem while error messages are retrieved by the SYSTem ERRor Command Further status is controlled and reported back by the IEEE 488 2 c
11. the device is in INITiate state some commands are not allowed A TTLTrg line is already forced in input or output An other TTLTrg line is already enabled in Output A CALCulation SCPI command is not allowed while Calculation state is OFF 222 Data Out of Bounds A command has been interpreted but cannot be executed because its value is out of bounds 224 Illegal Parameter Value Used when a certain value when possible is expected For example the CAL STAT HOLD command generates an Error because the interpreter expects an ON or OFF parameter instead of HOLD Astronics Test Systems Programming the 2461 Module 4 27 2460 Series User Manual Publication No 980833 Rev A 230 Data Corrupt or Stale A FETCh command is sent but no data is available while the device is in idle state 240 Hardware Error A command or request may not be executed because it is not allowed For example no instrument is selected and the user sends a MEASure command or A time out occurs 241 Hardware Missing A command or request may not be executed because the corresponding hardware does not exist For example an option is not installed Instrument Specific Errors Error Description Description Explanation Examples Number 311 Memory Related Error An error has occurred in one of the memory areas of the module The problem may arise when programming the Non volatile memory or when transferring samples in DMA m
12. time out period SYSTem PRESet Description Reinitializes the entire module Identical to the RST common command Appendix C lists the default conditions for this command No Interrogative form kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Astronics Test Systems Programming the 2461 Module 4 13 2460 Series User Manual Publication No 980833 Rev A SYSTem VERSion gt lt numeric_value gt Description Returns the SCPI year version to which the instrument conforms 1996 0 SYSTem ERRor gt data string Description Returns an error message in the Error Output Queue a FIFO queue The oldest error message is sent first and error messages are removed from the queue once sent When the queue is empty the message 0 No error is sent If an error occurs after the queue is already full the message 350 Queue overflow is stored instead of the error Any further errors are not stored kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SYSTem TIMeout lt integer gt Description Sets the maximum amount of time a query measurement command FETCh READ MEAS is allowed to take If the query command has not completed within the specified time the command is aborted and a TIMEOUT error is placed in the error queue Only one time out can be programmed to control all the instrument boards Parameters integer Represents the value of the time out in seconds It can take value from 0 to 100 000 0
13. AEFF 16 The response is placed in the Data Low Register The END field indicates the last byte of the message Response 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 lo li li h h fo feno om Clear This command is used by a master to force a slave to re initialize the VXI interface and interrupt all operations Any operation underway when this command is received is terminated normally Command FFFF 46 Response No response Astronics Test Systems Programming the 2461 Module 4 33 2460 Series User Manual Publication No 980833 Rev A Control Event This command is used by a master to selectively enable events generated by the slave A one 1 in the validation field enables specific event generation A zero 0 in the validation field disables specific event generation Command 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 jo t jo Event These bits 6 lt 0 identify the bits 14 lt 8 of the enabled disabled event See Section EA of the VXlbus Specification Protocol Events for more information The response is placed in the Data Low Register Response FFFE46 The command terminated normally 7FFEy6 Command default The instrument does not generate the referenced event End Normal Operation This command is used by the master to methodically halt all operations Upon receipt of this command the master sends an End Normal Operation command to all message based slaves The master is resp
14. ALLATION INSTRUCTIONS Unpacking and 1 Remove the 2460 Series module and inspect it for d damage If any damage is apparent inform the carrier Inspection immediately Retain shipping carton and packing material for the carrier s inspection 2 Verify that the pieces in the package you received contain the correct 2460 Series module option and the 2460 Series Users Manual Notify Customer Support if the module appears damaged in any way Do not attempt to install a damaged module into a VXI chassis 3 The 2460 Series module is shipped in an anti static bag to prevent electrostatic damage to the module Do not remove the module from the anti static bag unless it is in a static controlled area i 1 Use the original packing when returning the switching Reshipment module to Astronics Test Systems for calibration or Instructions servicing The original shipping carton and the instrument s plastic foam will provide the necessary support for safe reshipment 2 f the original packing material is unavailable wrap the switching module in an ESD Shielding bag and use plastic spray foam to surround and protect the instrument 3 Reshipin either the original or a new shipping carton Astronics Test Systems Installation Instructions 2 1 2460 Series User Manual Installation Publication No 980833 Rev A The installation of the 2460 Series VXIbus module into a chassis or mainframe is shown in the following diagram
15. B8 B7 B6 BS B4 B3 B2 Bl BO Condition Register y Operation d EE E MEAS INIT MEAS INIT TEST oo ll o 2 2 1 1 Event BIS Bl4 B13 Bi2 Bll BIO Bo B8 B7 B6 BS B4 B3 B2 Bl BO i Register amp amp b Operation ee eias es MEAS INIT MEAS INIT TEST u ico oo to ii zer 2 2 1 1 Enable Bis B14 B13 BI2 Bil Bio B9 B8 B7 B6 BS B4 B3 B2 Bl BO e Register M TEST Testing State To Operation Status amp Logical AND INITI Initiate State UCT 1 MEASI Data Available UCT 1 INIT2 Initiate State UCT 2 MEAS2 Data Available UCT 2 Summary bit of the Status Byte Register OR Logical OR Figure 4 1 Operation Status Register Programming the 2461 Module 4 10 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual STATus PRESet Description Clears to zero all bits of the Status Operation Enable Register Clears to zero all bits of the Status Operation Condition Register This command does not erase the EVENt registers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk STATus OPERation EVENt gt lt numeric_value gt Description Returns the contents of the Operation Event register Erases the contents of the Operation Event register after reading Refer to Figure 4 2 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk STATus OPERation ENABle lt numeric_value gt Description Paramet
16. BEC and carry the CE mark accordingly The products were tested in a typical configuration Name of Authorised Signatory PRINT Professional Title of Signatory PRINT i Signature of Authorised Signatory Place and Date of Issuc RIL 071D This page was left intentionally blank Publication No 980833 Rev A 2460 Series User Manual Table of Contents Fe 1 6 ee d 14 GENERAL etre d oe pe omer AAA gr or rey heer errant Terre Pr 1 1 The 2460 Series VXIbus TEEN 1 1 Modularity and e 1 2 Cost EMeCIVO vic dit 1 2 Field Upgradable on E 1 2 EES S E EEEE A E EE MU Cree Pre i boh sable ttes 2 1 INSTALUATIONANSTRUGTIONS2 s apii d dtu ria Qd neun Pies cad veda 2 1 Unpacking and Inspeclion iro hte o e ele Fe heed nee ask ot cubi ee E ee ERO 2 1 Reshipment iiy retra rcm PE 2 1 lui fever AEE 2 2 The VXIplug amp play Driver and Product Manuals seeeeeennn 2 4 Checking To See That The Module is Operation 2 4 Removing the Module From The Maintrame Ak 2 4 Recommended opreegen Geer reet e Gebeess 2 4 A A Tr 3 1 OPEBAHON OF THE 2467 2 ia Ai AA a RO er 3 1 VIA THE VXlplug amp play DAVE Rita cir cdo 3 1 A A EE 3 1 Using The Soft Front Panel rte ee tete acia 3 1 Astronics Test Systems i 2460 Series User Manual Publication No 980833 Rev A Nai e M o LL LM M ao 4 1 PROGRAMMING THE 2461 MODULE cecilia 4 1 o o MTM rU 4 1 General Principles e tee cia 4 1 Opera
17. able batteries damage from battery leakage or problems arising from normal wear such as mechanical relay life or failure to follow instructions This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular use The remedies provided herein are buyer s sole and exclusive remedies For the specific terms of your standard warranty contact Customer Support Please have the following information available to facilitate service 1 Product serial number 2 Product model number 3 Your company and contact information You may contact Customer Support by E Mail atshelpdesk astronics com Telephone 1 800 722 3262 USA Fax 1 949 859 7139 USA RETURN OF PRODUCT Authorization is required from Astronics Test Systems before you send us your product or sub assembly for service or calibration Call or contact Customer Support at 1 800 722 3262 or 1 949 859 8999 or via fax at 1 949 859 7139 We can also be reached at atshelodesk astronics com If the original packing material is unavailable ship the product or sub assembly in an ESD shielding bag and use appropriate packing materials to surround and protect the product PROPRIETARY NOTICE This document and the technical data herein disclosed are proprietary to Astronics Test Systems and shall not without express written permission of Astronics Test Systems be used in whole or in part to solic
18. cs Test Systems Publication No 980833 Rev A 2460 Series User Manual Power up Clears register CLS Clears register RST No effect STATus PRESet No effect kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk IDN gt RACAL lt Model_number gt lt Serial_Number gt lt Firmware_revision gt lt FunctionCard1 Firmware_revision gt lt FunctionCard2 Firmware_revision gt Description Returns the model identification manufacturer model number serial number and firmware revision s For example RACAL 2461 U971301 01 03 01 03 01 03 The firmware revision field includes the 2461 revision first number and the Function Card Firmware Revision s OPC Description After the OPC command is sent The Operation Complete bit BO of the Standard Event Status Register will set immediately after the last pending command is completed If the corresponding bit BO in the Standard Event Enable Register and bit 5 ESB of the Service Request Enable Register refer to SRE command are set the RQS MMS bit in the Status Byte Register will set Refer to Figure 4 2 and 4 3 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Astronics Test Systems Programming the 2461 Module 4 21 2460 Series User Manual OPC gt 1 Description Publication No 980833 Rev A When this common command is sent an ASCII 1 will be placed in the VXI Output buffer after the last pending operation is completed The 1 in the Outpu
19. cter Commands sent to the 2461 conform to SCPI guidelines The SCPI command set is a tree structure All SCPI commands are grouped into various sub systems SENSE CONFIGURE MEASURE INPUT OUTPUT CALCULATE CALIBRATE SOURCE TEST INSTRUMENT STATUS and SYSTEM etc The basic form of a SCPI command is Programming the 2461 Module 4 2 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual ay Command Command mnemonic mnemonic eg 7N Space DATA DATA Commands may be concatenated on the same line Astronics Test Systems Programming the 2461 Module 4 3 2460 Series User Manual Sending and Receiving SCPI Commands Over the VXlbus Selecting an Application Publication No 980833 Rev A Commands and string data in SCPI have two forms long form and short form in the following command definitions and examples capitals are used to represent the short form and a mix of capitals and lowercase make up the long form The 2461 can only accept the long or the short form as defined Using a form between short and long form is not permissible SCPI commands are sent over the VXIbus by using the word serial command byte available See definition later The last byte sent in a command line must either have the END bit set or a Line Feed must be appended to the end of the command line The system controller will usually set the END bit for the user It is permissible to terminate a command line with both
20. e 2461 Via the VXIplug8play Driver 3 1 2460 Series User Manual Publication No 980833 Rev A troubleshooting guide in the help file should be followed If it is desired to run the demonstration version then the YES option should be selected If one 2461 is found then the main front panel of the 2461 will appear on the screen and appear similar to that shown in Figure 3 1 If more that one 2461 is found then a selection list will be presented enabling the user to choose which one to operate Then the main front panel Figure 3 1 will appear for that 2461 Racal Instruments 2461 Instrumentation System 2461 Instrumentation System Fitted Function Cards Active 1 Universal Counter Timer D 12 Slot 2 Universal Counter Timer System Functions Status Self Test Help Functions About Help Figure 3 1 Main Soft Front Panel of the 2461 application All installed function cards are shown in selectable buttons Clicking on one of these will bring up the main front panel of that function card These function card sub panels may contain further sub panels depending on the application The System Functions panel shown in Figure 3 2 enables the user to set the system time out shows the most recent system error and the SCPI specification revision to which the instrument conforms The Status button displays the status byte of the 2461 The Self Test button initiates a self test on the module and Operation
21. e Data Low Register Response FFF9y6 an interrupt generator Astronics Test Systems Programming the 2461 Module 4 35 2460 Series User Manual Publication No 980833 Rev A Read Protocol A master uses this command to determine what protocol is used in the word serial protocol used by the slave Command DFFF 46 The supported protocol word is placed in the Data Low Register Response FE231g The 2400 VXI Instrumentation is capable of generating the events supports the Read Interrupts Read Interrupt Line and Assign Interrupt Line commands supports the Word Serial Trigger commands supports the VXI IEEE 488 2 Instrument protocol supports the VXI Instrument protocol Programming the 2461 Module 4 36 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Read Protocol Error A master uses this command to ask its slave to report its current error status in the form of a 16 bit response After having replied to this command the slave resets its Current Error status to No Error Command CDEE e The error code is placed in the Data Low Register There are many possible responses No Error FFFFig Multiple Queries FFFDi The instrument was instructed to write over a previous unread response Unsupported command FFFCi The instrument received an unsupported command DIR violation FFFBy6 The instrument received a command that vi
22. e and Standard Event Status Register The Status Byte provides global system status information that the user may select through the Enable Registers The Standard Event Status Register reports standard events such as Error Detection or Operation Complete SCPI has added a few supplementary registers which represent the status and events specific to the instrument Three registers are available at the same level A CONDition register reports the state of the instrument and each state change for the instrument is indicated in the Condition register An EVENt register captures changes in the associated Condition register When a change has been captured the Event register signals the change even if the Condition register has returned to its initial state A few bits of the Event register do not reflect changes in the corresponding Condition register These bits represent the state of the selected bits in other Event registers The selection of these bits is specified in the ENABle register Astronics Test Systems Programming the 2461 Module 4 9 2460 Series User Manual Publication No 980833 Rev A aesti cet pre MEAS INIT MEAS INIT TEST o bu oA obo Operation 2 2 1 1 Se Bis Bl4 B13 B12 Bil B10 Bo
23. e interrupt generator Command 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 lo h jo j fo j o wn x um L Insignificant Int_ID Unique identifier of the assigned interrupt generator For this model the INT ID field has the value 001 Line Number of the IRQ line on the VME bus A zero value indicates that the interrupt generator is disconnected Action if Int ID 001 save the value of Line The response is placed in the Data Low Register Response if Int ID 001 gt FFFE46 else gt 7FFE46 Programming the 2461 Module 4 30 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Asynchronous Control Mode A master uses this command to create a path for events and responses Command Response 15 14 13 12 11 10 76 54 9 8 3 2 1 0 1 1 1 X Val Val Resp Event Resp Event Mode Mode X Val Resp Val Event Resp Mode Event Mode Insignificant A zero 0 enables reply generation A one 1 disables reply generation A zero 0 enables event generation A one 1 disables event generation A one 1 indicates that responses can be sent as signals indicates responses can be sent as interrupts A zero 0 A one 1 indicates that events can be sent as signals A zero 0 indicates that events can be sent as interrupts The response is place in the Data Low Register 15 14 13 12 11 109 8 7 6 5 4 3 2 1 0 Status 111 1 111 1 1 1 Val Val Resp
24. eg for a PCI MXI 2 system run Resman 2 Run the Self Test from the VXlplug amp play soft front panel and check that a PASS is indicated To remove the module from the VXI mainframe power down the mainframe and release the captive screws that secure the module to the mainframe Use the plastic levers provided on the top and bottom edges to eject the module from the mainframe Pull the module along the guides provided and out of the mainframe To utilize the full capability of the module the slot O controller should have A32 addressing capability A controller with only A16 A24 capability may be used but the speed advantage gained with shared memory access will not be realized Note the module has no A24 capability Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual VXlplug amp play Driver Using The Soft Front Panel Astronics Test Systems Chapter 3 OPERATION OF THE 2461 VIA THE VXIplug amp play DRIVER Use of the VXIplug amp play driver allows the operator to develop programs without intimate knowledge of the command set SCPI or IEEE 488 2 standards The driver consists of a number of functions help files soft front panels knowledge base and help facility The front panels give the programmer an easy conversion of front panel settings into function calls Alternately the functions calls can be written directly by the programmer The soft front panel is an application that allows interac
25. elected instrument Only one instrument can be selected at any time The selection of an instrument automatically deselects the other instrument Parameter lt identifier gt a string specifying the instrument to be selected Astronics Test Systems Programming the 2461 Module 4 7 2460 Series User Manual Publication No 980833 Rev A The identifier list can be retrieved by the INSTrument CATalog command Initialization RST COUNTer1 Example INST SEL COUNter1 Selects the COUNter1 instrument MEAS FREQ Takes a frequency measurement COUNTer1 INST CAT gt COUNter1 COUNter2 Returns the identifier list of the module INST SEL COUNter1 Selects the COUNter1 instrument INIT Initiates a measurement COUNter1 INST SEL COUNter2 Selects the COUNter2 instrument INIT Initiates a measurement COUNter2 Interrogative form Queries the currently selected instrument INSTrument SELect gt lt COUNter1 COUNter2 gt Programming the 2461 Module 4 8 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual STATus subsystem STATus command summary STATus Path to control operation registers OPERation EVENt Reads the event register ENABIe Programs the enable register ENABle Reads the enable register CONDition Reads the condition register PRESet Returns status registers to default states General Description The IEEE 488 2 standard requires two registers Status Byt
26. er Sets the specified ENABle register Each enable register is used as a mask for events When a bit in an event enable register is cleared 0 the corresponding bit in the event register is masked and thus cannot set the corresponding bit of the next register set in the status structure Conversely when a bit in an event enable register is set 1 the corresponding bit in the event register is unmasked When the unmasked bit in the event register sets the summary bit of the next register set in the status structure will set Refer to Figure 4 2 lt numeric_value gt 0 Clear enable register 256 Set bit B8 of enable register 512 Set bit B9 of enable register 1024 Set bit B10 of enable register 2048 Set bit B11 of enable register 4096 Set bit B12 of enable register The sum of the decimal weights of the bits that you wish to set is sent as the Astronics Test Systems Programming the 2461 Module 4 11 2460 Series User Manual Publication No 980833 Rev A parameter lt numeric_value gt for the appropriate ENABle command Initialization RST CLS Not affected Power up 0 Note that after power up by default none of the bits of the STATus OPERation EVENt register are reported to bit 7 of the Status Byte Examples STAT OPER ENAB 512 enables the INIT bit of the STATus OPERation EVENt to be reported in bit B7 of the Status Byte Interrogative form STATus OPERation ENABle gt numeric value kkkk
27. ground If the instrument fails to operate satisfactorily shows visible damage has been stored under unfavorable conditions has sustained stress Do not operate until performance is checked by qualified personnel DECLARATION OF CONFORMITY Ser No CE 021 We Supplier s Name Racal Instruments Ltd Supplier s Address 480 Bath Road Slough Berks SL1 6BE declare under our sole responsibility that the following product s Product Name 2460 Series VXI module Product Model Number s 2461 Cx Cx where xa to f Product Options Not Applicable to which this declaration relates conform s witb the following standard s or other normative document s EN 61010 1 1993 A2 1995 Emissions ENS5022 1988 Class B BSEN 55022 1995 Class B Immunity EN50082 1 1992 IEC 801 2 1991 BSEN 60801 2 1993 4kV CD 8kV AD performance criteria b TEC 801 3 1984 1EC 1000 4 3 1995 3V m performance criteria b TEC 801 4 1988 BSEN 61000 4 4 1995 kV power lines 500V Signal amp data lines performance criteria b TEC 1000 4 5 1995 1kV L N E 500V L N performance criteria b TEC1000 4 6 1996 3V performance criteria b TEC 1000 4 11t 1994 duration of dip 1 cycle performance criteria c Supplementary Information The products herewith comply with the requirements of the Low Voltage Directive 73 23 EEC as amended by Directive 93 68 EEC and the EMC Directive 89 336 EEC as amended by Directives 92 3 EEC and 93 68
28. he currently selected instrument STATus command summary Command STATus Path to control operation registers OPERation EVENt Reads the event register ENABIe Programs the enable register ENABle Reads the enable register CONDition Reads the condition register PRESet Returns status registers to default states SYSTem command summary SYSTem PRESet Sets the device to the default state VERSion Returns the SCPI year version ERRor Queries the Error Queue TIMeout Sets a time out period TIMeout Returns the time out period Programming the 2461 Module 4 6 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual INSTrument Subsystem The INSTrument subsystem provides a mechanism to identify and select the different instruments present on the VXI module INSTrument command summary INSTrument CATalog Lists the present instruments SELect Selects an instrument by name SELect Returns the name of the currently selected instrument INSTrument CATalog Description This query command returns a comma separated list which contains the names of individual instruments present on the 2461 module Example INST CAT gt COUNter1 one function card fitted INST CAT gt COUNter1 COUNter2 two function cards fitted INSTrument SELect lt identifier gt Description This command selects a specified instrument The following SCPI commands will only control the s
29. icers employees subsidiaries affiliates and distributors harmless against all claims arising out of a claim for personal injury or death associated with such unintended use FOR YOUR SAFETY Before undertaking any troubleshooting maintenance or exploratory procedure read carefully the WARNINGS and CAUTION notices CAUTION RISK OF ELECTRICAL SHOCK DO NOT OPEN If this instrument is to be powered from the AC line mains through an autotransformer ensure the common connector is connected to the neutral earth pole of the power supply This equipment contains voltage hazardous to human life and safety and is capable of inflicting personal injury Before operating the unit ensure the conductor green wire is connected to the ground earth conductor of the power outlet Do not use a two conductor extension cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord Maintenance and calibration procedures sometimes call for operation of the unit with power applied and protective covers removed Read the procedures and heed warnings to avoid live circuit points UTION SENSITIVE ELECTRONIC DEVICES Dx AR Before operating this instrument 1 Ensure the proper fuse is in place for the power source to operate 2 Ensure all other devices connected to or in proximity to this instrument are properly grounded or connected to the protective third wire earth
30. inframe ensure that the it has the rear connector P1 oriented to mate with the corresponding connector on the mainframe backplane Align the module with the guides for the slot selected and slide the module into the mainframe Push the module home to connect it to the mainframe Secure the module to the mainframe with the captive screws provided at the top and bottom edges of the front panel Poor mechanical alignment of the module s rear connectors P1 and P2 may require that it be reseated in the VXI mainframe Do NOT use undue force to seat the module Astronics Test Systems Installation Instructions 2 3 2460 Series User Manual The VXlplug amp play Driver and Product Manuals Checking To See That The Module is Operational Removing the Module From The Mainframe Recommended Controllers Installation Instructions 2 4 Publication No 980833 Rev A CD part number 980833 003 supplied with this unit contains the 2460 series driver To install the VXlIplug amp play driver the computer must be running WIN 95 or WIN NT NOTE This CD also contains the 2460 Series manual part number 980833 and the 2461C Universal Counter Timer manual 980833 002 Power up the chassis mainframe Ensure that the SYSFAIL LED on the module s front panel illuminates and then extinguishes after a few seconds This indicates that the module has passed its power up self test and is now ready for use 1 Initialize the system as appropriate
31. ion s SCPI Version Year 1996 0 Main Board Demo Click in window to continue Figure 3 5 About secondary Soft Front Panel of the 2461 application Astronics Test Systems This panel shows the Software revision of the soft front panel instrument driver VISA library and LabWindows CVI As well as instrument details such as its type and serial number the SCPI revision to which the software complies the firmware revision of the main board and any function card s Operation of the 2461 Via the VXIplug play Driver 3 5 2460 Series User Manual Publication No 980833 Rev A This page was left intentionally blank Operation of the 2461 Via the VXIplug amp play Driver 3 6 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Chapter 4 PROGRAMMING THE 2461 MODULE i This Section provides information about using the general Introduction SCPI commands and how to establish the correct system configurations for the VXI application function cards mounted in the 2461 VXI Module The following information is provided A general description of SCPI Commands and Syntax Rules General Commands and Common Commands available Common Error Messages inci The 2461 can be operated in two ways using the supplied General Principles Plug and Play driver or by sending and receiving SCPI compliant commands and data If the Plug and Play driver is used the user has the option of running the soft fron
32. it quotations from a competitive source or used for manufacture by anyone other than Astronics Test Systems The information herein has been developed at private expense and may only be used for operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation into technical specifications and other documents which specify procurement of products from Astronics Test Systems TRADEMARKS AND SERVICE MARKS All trademarks and service marks used in this document are the property of their respective owners e Racal Instruments Talon Instruments Trig Tek ActivATE Adapt A Switch N GEN and PAWS are trademarks of Astronics Test Systems in the United States DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should ensure that they are used properly and in accordance with this document and any other instructions provided by Seller Astronics Test Systems products are not specifically designed manufactured or intended to be used as parts assemblies or components in planning construction maintenance or operation of a nuclear facility or in life support or safety critical applications in which the failure of the Astronics Test Systems product could create a situation where personal injury or death could occur Should Buyer purchase Astronics Test Systems product for such unintended application Buyer shall indemnify and hold Astronics Test Systems its off
33. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk STATus OPERation CONDition gt lt numeric_value gt Description Returns the contents of the Operation CONDition register Refer to Figure 4 2 Content of the Status Operation Condition Register Bit B8 Testing state Test Set when the instrument has completed the self test process and clear when it starts the testing process Bit B9 Initiate state Init1 Set when the first instrument is in the Initiate state Trigger mode and clear when it returns in the idle state normal mode Bit B10 Data available Meas1 Set when all of the required measurements have been completed by instrument 1 Cleared when the measurement is in progress Programming the 2461 Module 4 12 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Bit B11 Initiate state Init2 Set when the second instrument is in the Initiate state Trigger mode and clear when it returns in the idle state normal mode Bit B12 Data available Meas2 Set when all of the required measurements have been completed by instrument 2 Cleared when the measurement is in progress Initialization RST Not affected CLS or STAtus PRESet 0 Power up 0 SYSTem subsystem SYSTem command summary SYSTem PRESet Sets the device to the default state VERSion Returns the SCPI year version ERRor Queries the Error Queue TIMeout Sets a time out period TIMeout Returns the
34. ng commands have been executed Places an ASCII 1 into the VXI output buffer when all pending selected device operations have been completed Returns the module to the default conditions Sets the contents of the Service Request Enable Register Returns the value of the Service Request Enable Register Returns the value of the Status Byte Register The module performs an autotest and returns the result Causes the UCT to switch from the Idle to the Initiated state Programming the 2461 Module 4 16 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Status Summarv Messages Generation Service es POS esa ao Ta gt E ees dude STE e EE e sol e ea en t t i iiim 5 Register D 8 Il sre OSB ESB MAV EAV SRE _ 87 Be 5 84 83 B2 Bn BO Service Request Enable Register OR Loaical OR OSB Operation Status Summary Bit amp Logical AND MSS Master Summary Status RQS Request for Service ESB Event Summarv Bit MAV Message Available EAV Error Available Figure 4 2 Status Byte and Service Request Astronics Test Systems Programming the 2461 Module 4 17 2460 Series User Manual Publication No 980833 Rev A Standard Event Status Reaister B7 B6 B5 B4 B3 B2 B1 BO B7 BO Bb B4 B3 B2 B1 BO Standard Event Status Enable Register Bit ESB of the Statu
35. ode 350 Queue Overflow A specific code has been entered in the Queue instead of the normal error code which caused the error This code indicates that the Queue is full and that the error that occurred has not been recorded Programming the 2461 Module 4 28 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual VXIbus Word Serial commands The 2400 VXI Instrumentation module supports the following commands They are described in detail in the following paragraphs Abort Normal Operation Assign Interrupt Line Asynchronous Mode Control Begin Normal Operation Byte Available Byte Request Clear Control Event End Normal Operation Read Interrupter Line Read Interrupters Read Protocol Read Protocol Error Read STB Abort Normal Operation This command is used to halt normal operations When the instrument receives this command it returns to its default configuration aborting any ongoing operations The aborted state is defined as follows Waiting interrupts are not acknowledged new bus or interrupt requests may not be acknowledged The instrument is in an inactive state and is ready to receive commands Command C8FF16 The response is placed in the Data Low Register Response FFFE16 Astronics Test Systems Programming the 2461 Module 4 29 2460 Series User Manual Publication No 980833 Rev A Assign Interrupt Line This command is used to assign an IRQ line of the VME bus to a slav
36. of the 2461 Via the VXIplug amp play Driver 3 2 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual returns the result as a text message Note that the self test checks all function cards installed in the 2461 module The Hide All FC Panels button temporarily disables the active secondary panels The About button shown in Figure 3 3 contains information on the instrument driver and firmware of the 2461 and function cards The Help button supports on line help which provides the user with an efficient way to use the panel without referring to printed documentation Note that clicking on a control with the right mouse button will provide help for that control The Reset button re initializes the module and all the function cards fitted to their default conditions The Close button releases the interface and stops the execution of the soft front panel application The Active LED indicates the status A Green LED indicates a working 2461 or an LED in the OFF state and a D in front of the slot number indicates the soft front panel is in DEMO mode The slot number indicates the physical position of the selected 2461 System Functions 2461 Instrumentation System Information Only SCPI Version Year 19950 System Error Number 0 Message No Error Figure 3 2 System Functions secondary Panel of the 2461 application Astronics Test Systems Operation of the 2461 Via the VXIplug play
37. olates the DIR protocol DOR violation FFFAi The instrument received a command that violates the DOR protocol Read Ready violation FFF946 The instrument received a command that violates the Read Ready protocol Write Ready violation FFF81g The instrument received a command that violates the Write Ready protocol Astronics Test Systems Programming the 2461 Module 4 37 2460 Series User Manual Publication No 980833 Rev A Read STB This command allows a master to read the status byte of a slave Command CFFF 6 The status byte is placed in the Data Low Register Response 15 14 13 12 6 5 4 3 2 1 0 1 10 9 8 7 Status Byte Programming the 2461 Module 4 38 Astronics Test Systems
38. ommands ESR ESE SRE and STB In SCPI protocol a query command generates a response which must be read back In some circumstances a query command will fail and no response will be available If this is the case an attempt to read back the information queried can cause the system to appear to hang This is especially true of measurement type instruments such as UCTs where no signal means that a measurement cannot take place when the MEAS Or READ Is sent To overcome this problem the 2461 implements the SCPI command SYSTem TIMeout command where the 2461 imposes a timeout value on certain query commands Should an application not respond within the timeout value the 2461 will generate a timeout error and produce an extremely large result to avoid a hang up situation Setting the timeout value to zero disables the timeout function Note that the timeout value applies to all 2461 query commands including application commands Other timeout mechanisms may exist in the system controller and associated software and if the operator wishes to use the timeout facility of the 2461 then these timeouts must not pre empt the 2461 timeout Programming the 2461 Module 4 5 2460 Series User Manual Publication No 980833 Rev A General Commands List of General SCPI Commands INSTrument command summary INSTrument CATalog Lists the present instruments SELect Selects an instrument by name GEI ect Returns the name of t
39. onsible for halting the slaves The End state is defined as follows waiting interrupts are not acknowledged new bus or interrupt requests may not be acknowledged The instrument is in an inactive state and is ready to receive other commands Command C9FF 1g The response is placed in the Data Low Register Response FFFE 16 Programming the 2461 Module 4 34 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Read Interrupt Line This command is used to determine to which of the VME bus IRQ lines a slave s particular interrupt generator is connected Command 15 14 13 12 1110 9 8 7 6 5 4 3 2 1 0 a jo jo jo jh h fo Int ID X Insignificant Int ID Unique identifier of the specific interrupt generator For this module the Int ID field must contain the value 001 The VME bus IRQ line number is placed in the Data Low Register Response 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Si EA egt gegen op Bine Status This field indicates the status of command execution F16 The command has executed correctly 716 Command default The interrupt generator referenced in the Int ID field is unknown to the instrument Line The IRQ line number on the VME bus A value of zero 0 indicates the interrupt generator is disconnected Read Interrupts This command is used to determine the number of a slave s interrupt generator Command CAFF16 The number of the interrupt generator is placed in th
40. rect but the command is not defined for this instrument For example XYZ is defined for no instruments 120 Numeric Data Error Like Error 121 this error is generated when data appears that includes non decimal numeric data types This error message may appear if the instrument cannot detect a more specific error or Invalid Data character An invalid character has been received in a lt data_string gt 121 Invalid Character in Number An invalid data type character has been received For example an alphabetic character in a number 144 Data String Too Long The data string element contains more than twelve characters see IEEE 488 2 7 7 1 4 Programming the 2461 Module 4 26 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Execution Errors Error Description Description Explanation Examples Number 200 Execution Error This error occurs when the VXI output buffer is full or if the INTERRUPT QUEUE is full or if the calibration date has been forgotten when closing the calibration process 210 Trigger Error 211 Trigger Ignored A TRG or trigger signal has been received and recognized by the instrument but for timing considerations has been ignored For example the instrument is not ready to respond 221 Configuration Conflict A command has been interpreted but cannot be executed because of the current state of the instrument Examples While
41. s Byte ESE Reaister ESE OR Logical OR CME Command Error amp Logical AND EXE Execution Error DDE Device Dependent Error QYE Query Error OPC Operation Complete Figure 4 3 Standard Event Status Programming the 2461 Module 4 18 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual CLS Description Erases all the Event registers all Condition registers the Error Queue and the Status Byte Register kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk ESE lt numeric_value gt Description Sets the Standard Event Enable Register This command is sent with the decimal equivalent of the binary value that determines the desired state 0 or 1 of the bits in the register This register is used as a mask fort the Standard Event Status Register When a standard event is masked disables the occurrence of that event will not set the Event Summary Bit ESB in the Status Byte Register Conversely when a standard event is unmasked enabled the occurrence of that event will set the ESB bit A cleared bit bit set to 0 in the enable register will prevent mask the ESB bit in the Status Byte Register from setting when the standard event occurs A set bit bit set to 1 in the enable register will allow enable the ESB bit to set when the corresponding standard event occurs Refer to Figure 4 3 Parameter lt numeric_value gt 0 Clear register 1 Set OPC BO of enable register
42. t buffer will set the MAV Message Available bit B4 of the Status Byte Register If the corresponding bit B4 in the Service Request Enable Register refer to SRE command is set the RQS MMS bit in the Status Byte Register will set Refer to Figures 4 2 and 4 3 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk RST Description Reset the module Identical to the SCPI SYSTem PRESet command Appendix C lists the default conditions for this command SRE lt numeric_value gt Description Sets the contents of the Service Request Enable Register This enable register is used along with the Status Byte Register to generate service request SRQ With a bit in the SRE register set an SRQ will occur when the corresponding bit in the Status Byte Register is set by an appropriate event Refer to Figure 4 2 Parameter lt numeric_value gt 0 Clears the register 4 Set EAV bit B2 16 Ger MAV bit B4 32 Set ESB bit B5 128 Set OSB bit B7 Programming the 2461 Module 4 22 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual The sum of the decimal weight of the bits that you which to set is the value that is sent with the SRE command For example to set the ESB and MAV bits of the SRE register send the following command SRE 48 where ESB bit B5 Decimal 32 MAV bit B4 Decimal 16 parameter 48 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SRE gt lt numeric_value gt Description
43. t panel application to get interactive control The 2461 is a VXlbus Module with up to three function cards plugged in at any one time Since all function cards by definition are accessed by the same logical address a means of accessing each application is provided The 2461 module processor has a general command set which is valid at all times This general command set contains commands to select an application Each application has its own command set Once an application has been selected then the command set for that application will become valid Note that a particular command may be valid for more than one application Astronics Test Systems Programming the 2461 Module 4 1 2460 Series User Manual Operation Via The SCPI Command Set SCPI Principles Publication No 980833 Rev A A brief description of the SCPI syntax is provided to allow basic operation For a more detailed definition of SCPI the appropriate specification should be consulted SCPI in conjunction with IEEE 488 2 lays down rules for syntax and protocols for instrument control If these rules are violated then a defined error process occurs The basic SCPI protocol relies on the bus controller sending information to an instrument An instrument will never send information to the controller unless requested or command to so by the bus controller The controller can illicit responses from the 2461 by sending a query command a command containing the chara
44. tate of the Manual Totalize i e it is started if the state was off or it is stopped if the state was on Example TRG Forces the UCT to the Initiated state Programming the 2461 Module 4 24 Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Error Messages No Errors Error Description Description Explanation Examples Number O No Errors The queue is empty Each error event in the queue has been read or the queue was erased by power on Command Errors Error Description Description Explanation Examples Number 101 Invalid Character An element of the syntax contains a character invalid for this type 102 Syntax Error Command not recognized or incorrect data type found For example a character string was received when the instrument expected something else 108 Illegal Parameter The number of parameters is greater than expected For example the SRE command only accepts one parameter so the command SRE 180 34 is illegal Astronics Test Systems Programming the 2461 Module 4 25 2460 Series User Manual Publication No 980833 Rev A 109 Missing Parameter The number of parameters is less than required For example the SRE command requires a parameter so the command SRE is illegal 112 Command Mnemonic Too Long The command mnemonic contains at most twelve characters see IEEE 488 2 7 6 1 4 1 113 Unknown Command The command syntax is cor
45. tion Via The SCPI Command Get 4 2 SGP diae rU 4 2 Sending and Receiving SCPI Commands Over the VXIbUS sssssssesseeeeeeeneneereereeeeerrreeeene 4 4 Selecting an AppliCAallOnt cet t a d dese rectc lagu de eeu redet rese EEN 4 4 status a o Error st eMe S 4 5 System TIMO er 4 5 General A EE M 4 6 List of General SCPI Comnmands coi a eei ed eter Fa eden eed eR FREIE 4 6 INSTrUMENt SUBS YS TO isc ee E Hr Ee red isti E uale Neat ae eo RU ea Opt kee 4 7 STATUS SUDSVSEIGITI ace I eter nona esteem PME Aedes 4 9 SYSTem Subs Lia E em 4 13 Eileen En EE 4 16 Error Message iaa cli 4 25 No EITOIS o A AAE een cea te 4 25 A A EE Ee eke 4 25 Execution ES ii 4 27 lnstr ment Specifie Erros cs laa 4 28 VXIbus Word Serial commands EE 4 29 Abort Ee ERT e LI ais a ata 4 29 Assign Interrupt La da 4 30 As nehrono s Control Mode coria EE 4 31 Begin Normal OPE MO sicario ilatina 4 32 ii Astronics Test Systems Publication No 980833 Rev A 2460 Series User Manual Byte Available a ii il 4 32 ESC A MU MA M MAS 4 33 p m e M 4 33 Gorir b EVO os oet tide ho ooo e obe te ped e od a 4 34 End Normal Operation EE 4 34 Read Interr pt Ene ace teet nehm netta di eo uiis i ae 4 35 Read Interrupts a 4 35 Ile Nee e EE 4 36 Read Protocol EO EE 4 37 RET lo RE 4 38 Astronics Test Systems iii 2460 Series User Manual Publication No 980833 Rev A List of Figures Figure 1 1
46. tive control of the 2461 using the driver functions The driver consists of a series of functions some of which are mandatory in the VXlplug amp play standard The remainder of the functions are device defined To use the driver it is first necessary to first to establish a link to the 2461 This is done by the ri2461 init function This function will return a handle for future access to the 2461 plugged into the VXI system All other functions will require this handle as a passed parameter If more than one 2461 exists in a VXI system then this function must be called for each instrument using the instrument descriptor to differentiate between instruments The instrument descriptor is generated by the resource manager A device defined function ri2461 autoFind is provided to determine the number of 2461 instruments together with their descriptors and slot numbers The soft front panel shown in Figure 3 1 gives the operator interactive control over the 2461 allowing the user to become more familiar with instrument operation All major functions are provided To use the soft front panel the driver must have been installed as previously described The soft front panel application should be launched The soft front panel application will now search for a 2461 or multiple 2461 in the VXI system If a window appears with the message No 2461 found in Chassis Do you want to run in Demo mode and a 2461 is plugged in then the Operation of th
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