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Agilent Technologies E1476A 64-Channel, 3-Wire

1. Code Error Message Potential Cause s 211 Trigger ignored Trigger received when scan not enabled Trigger received after scan complete Trigger too fast 213 Init Ignored Attempting to execute an INIT command when a scan is already in progress 222 Data out of range Parameter value is outside valid range 224 Illegal parameter value Attempting to execute a command with a parameter not applicable to the command 240 Hardware error Command failed due to a hardware problem 310 System error Internal driver error This error can result if an excessively long parameter list is entered 1500 External trigger source Assigning an external trigger source to a switchbox when the trigger already allocated Source has already been assigned to another switchbox 1510 Trigger source Selected trigger source is not available on this platform e g some non existent triggers are not available on E1300 E1301 VXI B Size mainframes 2000 Invalid card number Addressing a module card in a switchbox that is not part of the switchbox 2001 Invalid channel Attempting to address a channel of a module in a switchbox that is not number supported by the module e g channel 99 of a multiplexer module 2006 Command not Sending a command to a module card in a switchbox that is supported on this card unsupported by the module 2008 Scanlist not initialized Executing a scan witho
2. For This Change Line 40 to Comments Measurement Voltage N A Line 40 performs a DCV measurement 2 Wire Ohms 40 OUTPUT 70903 MEAS RES 100 131 4 Wire Ohms 40 OUTPUT 70903 MEAS FRES 100 131 Channels 32 63 are automatically paired with channels 00 31 for 4 wire measurements Thermocouple 40 OUTPUT 70903 MEAS TEMP TC K 100 131 Type K thermocouple temperature Temperature measurements Thermistor 40 OUTPUT 70903 MEAS TEMP FTH 5000 100 131 4 wire 50000 thermistor temperature Temperature measurements Chapter 3 Scanning Voltmeter Applications 61 Scanning Voltmeter Command Quick Reference The following tables summarize SCPI commands for the E1326 E1411 multimeters See the E1326 E1411 User s Guide for details Command Description ABORt Place multimeter in idle state CALibration LFRequency 50 60 MIN MAX Change line reference frequency LFRequency MIN MAX Query line reference frequency ZERO AUTO OFF 0 ON 1 Enable disable autozero mode ZERO AUTO Query autozero mode CONFigure FRESistance range lt resolution lt channel_list gt Configure multimeter for 4 wire ohms RESistance range lt resolution lt channel list Configure multimeter for 2 wire ohms TEMPerature lt transducer lt type lt channel list Configure multimeter for temperature VOLTage AC range
3. 96 Switchbox Command Reference Chapter 4 IEEE 488 2 Common Commands Reference This table lists the IEEE 488 2 Common commands accepted by the E1476A Multiplexer module For more information on Common Commands see the ANSI IEEE Standard 488 2 1987 The common commands RCL SAV and TST perform specific actions with the E1476A as described in the table Command Description CLS Clears all status registers see STATus OPERation EVENt and clears the error queue ESE register value Enable Standard Event ESE Enable Standard Event Query ESR Standard Event Register Query IDN Instrument ID Query returns identification string of the module OPC Operation Complete OPC Operation Complete Query RCL numeric state Recalls the instrument state saved by SAV You must reconfigure the scan list RST Resets the module Opens all channels and invalidates current channel list for scanning Sets ARM COUN 1 TRIG SOUR IMM and INIT CONT OFF SAV numeric state Stores the instrument state but does not save the scan list SRE register value Service request enable enables status register bits SRE Service request enable query STB Read status byte query TRG Triggers the module to advance the scan when scan is enabled and trigger source is TRIGger SOURce BUS TST Self test Executes an internal self test and returns only the
4. 48 Example Scanning Using TTL VXlbus Triggers 50 Example Scanning Using BUS 52 Example Using the Scan Complete sss 54 Recallitig SAVING SIMS E 55 PU RE He T 55 Recalling ln 55 Detecting Error CopndIBOma iden sepes Dad ood ada Eh dtd ra d ad rd hd t RA 56 B unAE p 56 BB der TR 56 Chapter 3 Scanning Voltmeter Applications 57 BUDE Ie c 57 Scanning Voltmeter ERS SOUR Rc 57 TPOS AAN 58 58 DINOS eM 58 To NGS 58 59 Scanning Voltmeter Measurements 60 Configuring the Scanning SOIN 60 Programming the Scanning Voltmeter 61 Scanning Voltmeter Command Quick Reference eese 62 Chapter 4 Switchbox Command Reference eese 65 Usmo e 65 Purdue UT 65 Gommon Commands POIL saisai 65 N T SS 65 SCPI Command gr c 67 Dile d 68 i e TP 70 1 ee e tA ETE NER EE Ea rr ener Tere 70 pad A 70
5. 12 cH39H CH39G 36 11 cH386 CH38L 35 o 10 CH38H CH37L 34 o 9 CH37H CH37G 33 8 CH366 CH36L 32 CH36H CH35L 31 o 6 CH35H CH356 30 o 5 CH846 CH34L 29 o fol 4 CH34H CH33L 28 3 CH33H CH33G 27 o 2 CH826 CH32L 26 o 1 CH32H 1 1 1 1 Bank B RT High BBTL Bank B RT Low Channels 16 31 GND 50 CH31L 49 CH31G 48 CH30L 47 CH29L 46 CH29G 45 CH28L 44 CH27L 43 CH27G 42 CH26L 41 CH25L 40 CH25G 39 CH24L 38 CH23L 37 CH23G 36 CH22L 35 CH21L 34 CH21G 33 CH20L 32 CH19L 31 CH19G 30 CH18L 29 CH17L 28 CH17G 27 CH16L 26 BATG Channels 48 63 GND 50 CH63L 49 CH63G 48 CH62L 47 CH61L 46 CH61G 45 CH60L 44 CH59L 43 CH59G 42 CH58L 41 CH57L 40 CH57G 39 CH56L 38 CH55L 37 CH55G 36 CH54L 35 CH53L 34 CH53G 33 CH52L 32 CH51L 31 CH51G 30 CH50L 29 CH49L 28 CH49G 27 CH48L 26 BBTG 25 BATG Ol 24 CH31H O 23 CH30G o 22 CH30H 21 CH29H 20 CH286 19 CH28H O 18 CH27H lt 17 cH266 M6 CH26H 15 25 14 cH24G fol
6. Install connectors Crimp and Insert 5 Route wiring Tighten wraps to secure wires Figure 1 10 Steps to Connect User Wiring to a Terminal Module cont d on next page Chapter 1 Getting Started 21 Cut required holes in panels hole as small as for wire exit possible Ji L NI ff NI f IN J YE C 9 Push in the extraction levers to lock the lt terminal module onto the E1476A Replace clear cover A Hook in the top cover tabs onto the fixture ni B Press down and aN tighten screws 8 Install the terminal module Extraction Levers Z d N b N EN E1476A Module 22 Getting Started Figure 1 10 Steps to Connect User Wiring to a Terminal Module cont d Chapter 1 Attaching Figure 1 11 gives guidelines to attach a terminal module to the multiplexer Terminal Module to the Multiplexer Chapter 1 1 Extend the extraction levers on the terminal module aN Extraction Lever Wu Use small screwdriver to release the two extraction levers E1476A Module Extraction Lever RN 2 Align the terminal module connectors A to the E1476A module connectors 3 Apply gentle pressure to attach the terminal module to the E14
7. Scanning Voltmeter lt 57 Scanning Voltmeter Measurements 60 Scanning Voltmeter Commands Quick Reference 62 The commands to use the E1476A in scanning voltmeter configuration are different than the commands to use the E1476A in switchbox configuration See Chapter 4 for switchbox configuration commands See Scanning Voltmeter Commands Quick Reference in this chapter for scanning voltmeter configuration commands Scanning Voltmeter Description Chapter 3 A scanning voltmeter configuration uses the voltmeter instrument driver VOLTMTR The scanning voltmeter commands are different from the switchbox commands listed in Chapter 4 A scanning voltmeter uses the commands in the E1326B E1411B 5 Digit Multimeter User s Manual to control the switches and make measurements See Figure 3 1 for a typical scanning voltmeter configuration a A Command Module Card Number 00 E1411A B Multimeter Logical Address 24 Secondary Address 03 Card Number 01 Multiplexer Number 1 Logical Address 25 32 uo Multiplexer Number 2 Q Qj Logical Address 26 Vm J Figure 3 1 Typical Scanning Voltmeter Configuration Scanning Voltmeter Applications 57 Measurement Types Tree Relays For scanning voltmeter configuration you can make measurements wi
8. resolutiorr channel 15 Configure multimeter for AC voltage VOLTage DC lt range gt resolution 1 Configure multimeter for DC voltage L lt channel_list gt CONFigure Query multimeter configuration DIAGnostic FETS mode Selects control of FET multiplexers FETS Query mode of operation DISPlay MONitor CHANnel channel AUTO Monitor multiplexer channel MONitor CHANnel Query monitor channel MONitor STATe OFF 0 ON 1 Enable disable monitor mode MONitor STATe Query monitor mode FETCh Place stored readings in output buffer FORMat DATA lt type gt lt ength gt Select output data format and length FORMat Query format INITiate IMMediate Place multimeter in wait for trigger state MEASure FRESistance lt gt lt gt lt channel_list gt Make 4 wire ohms measurements RESistance lt range gt lt resolution gt channel list Make 2 wire ohms measurements TEMPerature lt transducer type channel list Make temperature measurements VOLTage AC lt range lt resolution gt Make AC voltage measurements s channel list Make DC voltage measurements VOLTage DC range lt resolution gt lt channel_list gt MEMory VME ADDRess lt address gt Set address of memory on VME card VME ADDRess MIN MAX Query VME memory location address VME SIZE bytes Amount of memory used on VME card VME SIZE MI
9. E1476A E1476A Multiplexer Multiplexer E1476A Multiplexer Modules 24 Getting Started Figure 1 12 E1411B Connections to the Analog Bus Chapter 1 Connecting to an External Measurement Chapter 1 Device SeeFigure 1 13 for connection information An external measurement device can be connected to the analog bus by using the terminal module s VM Input and VM Ql terminals ze Ho Te LLl ini g IG IG IG G IG I i He lc S Bank Bank Terminals HE m Terminals Analog Bus to VM Analog Bus to VM Input QI VM VM Input QI H L G H L G x To External Measuring Device Figure 1 13 Externally Connecting to the Analog Bus Getting Started 25 Configuring the E1586A Rack Mount Terminal Panel This section gives guidelines to connect and configure the E1586A Rack Mount Terminal Panel Terminal Panel including Connecting the Terminal Panel Configuring the Terminal Panel Connecting the The E1586A Rack Mount Terminal Panel provides extended connections to Terminal Panel the E1476A multiplexer module The Terminal Panel is recommended if the E1476A is located some distance from the measurement
10. iwpoke delay iwpoke unsigned short base addr 0x04 1 100 must wait at least 100 usec before writing a 0 unsigned short base addr 0x04 0 Program Output Appendix B Printout from example program ID register OXFFFF Device Type register Ox 218 Status register OXFFBE Channels 00 15 register OXFFFF Channels 16 31 register 0 0 Channels 32 47 register 0 0 Channels 48 63 register 0 0 Channels 90 94 tree register OxFFO1 Register Based Programming 113 Notes 114 Register Based Programming Appendix B Appendix C E1476A Error Messages Error Types Appendix C Table C 1 lists the error messages generated by the E1476A Multiplexer module firmw are governed are when programmed by SCPI Errors with negative values by the SCPI standard and are categorized in Error numbers with positive values are not governed by the SCPI standard See the E1406 Command Module User s Manual for further details on these errors Table C 1 Error Types Range Error Types Description 199 to 100 Command Errors syntax and parameter errors 299 to 200 Execution Errors instrument driver detected errors 399 to 300 Device Specific Errors instrument driver errors that are not command nor execution errors 499 to 400 Query Errors problem in querying an instrument E1476A Error Messages 115 Table C 2 Multiplexer Error Messages
11. Name Type Range of Values Default Value mode discrete NONE VOLT RES FRES NONE Order of Command Execution ROUTe SCAN MODE must be executed before ROUTe SCAN channel list because SCAN MODE erases the current SCAN list NONE and VOLT Mode When selected channel list is set for volts measurements RES Mode When selected channel list is set for two wire ohms measurements FRES Mode When selected channel list is set up for four wire ohms measurements Only Bank A channel numbers can be scanned in the FRES mode each Bank A channel is paired with a Bank B channel to comprise four wires Use only channels 00 to 31 when specifying the channels with the ROUTe SCAN channel list command that follow the SCAN MODE command Any channel that closes in Bank A channel automatically closes the paired channel in Bank B for example if channel 0 closes channel 32 automatically closes along with it as do channels 1 and 33 etc An error is generated if you specify a channel from Bank B channels 32 to 63 in a channel list for the ROUT SCAN command while the scan mode is SCAN MODE FRES 4 wire resistance Related Commands ROUTe SCAN RST Condition ROUTe SCAN MODE NONE Selecting 4 Wire Ohms Mode TRIG SOUR EXT Select external trigger source SCAN MODE FRES Select the 4 wire ohms scanning mode SCAN 100 107 Set channel list INIT Start scanning cycle Switchbox Command Refere
12. To change the setting rotate the switch so the arrow points to the interrupt priority level desired Interrupts can also be disabled using the E1476A Status Control Register See Figure 1 6 for the Interrupt Request Level Switch Some mainframes may require that backplane jumpers be set correctly for each slot used See the appropriate mainframe manual for details go Interrupt Request Level Rotary Switch Location Interrupt Request IRQ Level 0 Interrupt Disabled 2 Figure 1 6 Setting Interrupt Request IRQ Priority Getting Started 17 Installing the The 1476 can be installed in any slot except slot 0 in a C Size VXlbus Multiplexer ina mainframe See Figure 1 7 for steps to install the multiplexer in a mainframe Mainframe x ON ERE 1 Set the extraction levers out CN 2 Slide the E1476A into any slot except slot 0 until the backplane connectors touch Extraction Levers 3 Seat the E1476A into the mainframe by pushing in the extraction levers P a cS lt 4 Tighten the top and bottom screws to secure the multiplexer to the mainframe NOTE The extraction levers will not seat the backplane connectors on older VXIbus mainframes You must manually seat the connectors by pushing in the module until the module s front panel is flush with the front of
13. Command Format Commands are separated into two types IEEE 488 2 Common Commands and SCPI Commands The IEEE 488 2 standard defines the common commands that perform functions such as reset self test status byte query and so on Common commands are four or five characters in length always begin with the asterisk character and may include one or more parameters The command keyword is separated from the first parameter by a space character Some examples of common commands are shown below RST ESR 32 STB The SCPI commands perform functions like closing switches making measurements and querying instrument states or retrieving data A subsystem command structure is a hierarchical structure that usually consists of a top level or root command one or more lower level commands and their parameters The following example shows part of a typical subsystem ROUTe CLOSe channel list SCAN channel list MODE ROUTe is the root command CLOSe and SCAN are second level commands with parameters and MODE is a third level command Chapter 4 Switchbox Command Reference 65 Command Acolon always separates one command from the next lower level command as Separator shown below ROUTe SCAN MODE Colons separate the root command from the second level command ROUTe SCAN and the second level from the third level SCAN MODE Abbreviated The command syntax shows most commands as a mixture of upper and
14. E1476A a Multiplexer Module E Figure 1 20 Exercise 5 Equipment Configuration Since the E1411B multimeter and E1476A multiplexer form a scanning voltmeter configuration the E1476A must have a logical address that is sequential to the E1411B Also the E1411B must be at an instrument address logical address divisible by 8 Set the E1411B to logical address 24 secondary address is 24 8 03 and the E14764 to logical address 25 The modules must be installed in adjacent slots with the multiplexer to the right of the multimeter The scanning voltmeter is addressed from GPIB interface 7 or the interface you use instead of 7 primary address 09 and secondary address 03 The scanning voltmeter address is 70903 and the multimeter controls the multiplexer module As required set the E1411B multimeter to logical address 24 and the E1476A multiplexer to logical address 25 Next install the instruments in the mainframe and connect the Analog Bus cable between the E1411B multimeter and the E1476A multiplexer Then connect resistors and or Zero Ohm jumpers to desired channels between 0 and 31 on the terminal module Getting Started 37 When the configuration is complete turn mainframe power ON and verify that the VOLTMETR driver version A 06 00 is installed in the E1406 Command Module see Exercise 1 If the appropriate VOLTMETR driver is installed run the following program This program scans channels 0 through 31 of the mu
15. E1476A 64 CHANNEL MULTIPLEXER ANALOG BUS FRONT PANEL CONNECTOR VOLTAGE SENSE BUS bg tt t CURRENT SOURCE BUS L VM Input G lt H L Ol G TO E1411B OR gt E1326B MULTIMETER TERMINAL MODULE 2 WIRE gt MEASUREMENT 2 COMMON TO E1412A OR gt EXTERNAL VM OR OTHER DEVICE N 1 Ce 1 x 1 CH07 ir bobus 100 222 235 5 ste seus VSA CH90 4 VOLTAGE SENSE i BANK Ed i HIH e CH15 eH gt GIG gt gt BANKA i HJH LIL C cH16 gt GIG gt C e 1 e 1 1 H H cH23 gt GIG gt CH24 i G G C e HIH 9 cH31 gt G G gt 1 1 1 1 gt gt En CH32 i 616 gt HIH gt LIL CH39 GJG gt H1H gt LIL CH40 GG e 1 VSB CH91 CH47 VOLTAGE SENSE BANK B i gt gt HJH gt LIL CH48 GiG Lu 1 CH55 i 5 1 6 CS CH92 CURRENT SOURCE T bh gt CH63 C
16. Example Scanning Using BUS Trigger This example uses the BUS trigger GET or TRG to synchronize channel closures with a 3457A voltmeter A DC voltage measurement is performed Measurement synchronization is attained by using the following E1406 and 3457A signals E1406 TTL Trig Out is used by the multiplexer to trigger the voltmeter for a measurement 3457A TTL Ext Trig is used by the voltmeter to know when to initiate a measurement The 3457 voltmeter GPIB select code 7 and primary address 22 addressed at 722 The E1476A GPIB select code 7 primary address 09 and secondary address 14 addressed at 70914 Figure 2 8 shows connections for this example A BASIC language example program follows Figure 2 8 3457A Multimeter External Trigger E1476A Terminal Module E q 4 Multiplexer A L Trig Out Module 1 a EAE ae Uo E3 cle Teele l zal 28 VM Input E Ke D 52 Switchbox Applications Figure 2 8 Example Scanning Using BUS Trigger Chapter 2 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 Chapter 2 ASSIGN Switchbox TO 70914 ASSIGN VM3457 TO 722 INTEGER Opc value OUTPUT VM3457 RESET OUTPUT VM3457 TRIG EXT OUTP
17. Name Type Range of Values Default Value number numeric 1 through 99 N A E1476A Multiplexer Module Model Number SYSTem CTYPe number returns HEWLETT PACKARD EI476A 0 A 08 00 where the 0 after E1476A is the module serial number always 0 and A 08 00 is an example of the module revision code number Reading the Model Number of a Card 1 Module SYST CTYP 1 Return the model number SYSTem ERRor returns the error numbers and corresponding error messages in the error queue of a switchbox See Appendix C for a listing of switchbox error numbers and messages Error Numbers Messages in the Error Queue Each error generated by a switchbox stores an error number and corresponding error message in the error queue The error message can be up to 255 characters long but typically is much shorter Clearing the Error Queue An error number message is removed from the queue each time the SYSTem ERRor command is sent The errors are cleared first in first out When the queue is empty each following SYSTem ERRor query returns 0 No error To clear all error numbers messages in the queue execute the CLS command Maximum Error Numbers Messages in the Error Queue The queue holds a maximum of 30 error numbers messages for each switchbox If the queue overflows the last error number message in the queue is replaced by 350 Too many errors The least recent error numbers messages remain in the queue and the most rece
18. Keep away from live circuits Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform procedures involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built into this product have been impaired either through physical damage excessive moisture or any other reason REMOVE POWER and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to Agilent for service and repair to ensure that safety features are maintained DO NOT service or adjust alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to Agilent for service and repair to ensure that safety features are maintained Declaration of Conformity Declarations of Conformity for this product and for other Agilent products may be downloaded from the Internet There are two methods to obt
19. unsigned short chan tree reg Tree relays unsigned short id reg dt reg ID and Device Type unsigned short stat reg Status Register create and open a device session INST 147 el476a iopen vxi 112 map the E1476A registers into user memory space base addr imap el476a I MAP VXIDEV 0 1 NULL clear the user screen clrscr reset the E1476A reset mux base addr Read ID and Device Type Registers read the multiplexer s ID and Device Type registers x id reg iwpeek unsigned short base addr 0x00 dt reg iwpeek unsigned short base addr 0x02 printf register 0x 4X nDevice Type register 0x 4X n id_reg dt_reg Read Status Register EXE OX GEO OOC phe multiplexers s etatis register TAX X eoe stat reg iwpeek unsigned short base addr 0x04 printf Status register 0x 4X n stat reg Appendix B Register Based Programming 111 Close and Open Channels RR KKK KK KKK KKK KKK KK KK close and open channels KOR KOK RK KKK ke x KK KK close channels 0 15 by setting all bits in register base 0x20 to 1 iwpoke unsigned short base addr 0x20 Oxffff write a 1 to the register for tree relay 90 base 0x28 so channels 0 15 can be connected to the analog bus iwpoke unsigned short base addr 0x28 1 read the E1476A relay control r
20. 13 CH24H fol 12 cH23H Ol 11 cH226 10 CH22H 9 cH21H o 8 CH206 7 CH20H 6 cH19H ol 5 CH18G fol 4 CH18H fol 3 CH17H lt 2 cH166 1 CH16H n Bank A RT Guard ol 25 BBTG ol 24 cH63H 23 cH626 22 cH62H ol 21 CH61H ol 20 cH606 o 19 18 cH59H ol 17 CH586 ol 16 CH58H lo l 15 CH57H o 14 cH566 o 13 cH56H 12 CH55H o 11 cH54G o t0 CH54H 9 cH53H ol 8 cH526 o CH52H o CH51H l 5 cH506 o 4 5 o 3 CH49H o 2 cH486 lol 61 1 Bank B RT Guard 2 Chapter 1 Figure 1 15 Terminal Module Option Pinouts Getting Started 27 Terminal Panel Cables HF Common Mode Filters Connecting the Terminal Panel Configuring the Terminal Panel 28 Getting Started There are two different SCSI cables available for connecting the E1586A Rack Mount Terminal Panel to the E1476A Option A3F Terminal Module In both cases four cables are required if all
21. Da s AE 72 isis sass ada a 72 DISr MONIO CARD 73 DBIESPLE av MONIO E DAT ER erts 73 DISPLAY WIIG so TATE 2isckntecxeneu es eserbebu bets eh CP E DIEN HERE 74 75 CON lI 75 UTA abe CON IT T esnia an 76 NiNa I 76 TT OL STATE 77 DOUTPaCEULTIQUES ATE RE EEREDRUN ZR 77 OUTPUT EX STATE 78 OUTPUT EXTemsll S DATE sorina Dee s el ae 78 OUTPULTTETEOUL ERE UTERE RU NE Re Iud E EH DR ER Dude ber 79 OUTPUT ULI SG S TATE 79 80 ROUTE C 80 Bi qo ci TR T T 81 ROUTE e runes 82 FONG cen EI 83 ROUTE SCAN e 83 IROJ TOCAN MODE 85 ROUTEISCANIMODE x 86 ROUTE SCAN PORT 86 CAD A 87 S TATUS P
22. 324 332341635 0363 6375 H H GH GH 5 C5 5 boa C287 C267 C277 C287 92929307 ee M NS d Bank A Bank B x Terminals Terminals Analog Bus to VM Analog Bus to VM S Input QI Figure 1 8 E1476A Standard Terminal Module Chapter 1 Getting Started 19 Terminal Module Option Terminal module Option A3E see Figure 1 9 provides a crimp and insert A3E terminal module that allows you to crimp connectors onto wires which are then inserted directly into the multiplexer s mating connector See the pin out diagram Figure 1 2 to make the connections Table 1 1 shows the accessories that can be used with crimp and insert Option Figure 1 9 Option A3E Crimp and Insert Connector Table 1 1 Option A3E Terminal Module Accessories Accessory Description Specifications Crimp and These contacts may be crimped onto a Wire Gauge Range 20 26 AWG Insert Contacts conductor and then inserted into a Quantity 250 each crimp and insert connector The crimp Plating Gold Plated Contact tool kit is required to crimp the contacts Maximum Current 2A at 709C onto a conductor and remove the con
23. A DISP MON ON command following a RST will display the following 15 0 H0000 31 16 0000 47 32 0000 63 48 0000 94 90 00 Example Enabling the Monitor Mode DISP MON CARD 2 Select module 2 in a switchbox DISP MON 1 Turn the monitor mode on DISPLay MONitor STATe DISPlay MONitor STATe queries the monitor mode The command returns a 1 if monitor mode is on or a O if monitor mode is off 74 Switchbox Command Reference Chapter 4 INITiate Subsystem Syntax The INITiate command subsystem selects continuous scanning cycles and starts the scanning cycle INITiate CONTinuous mode CONTinuous IMMediate INITiate CONTinuous Parameters Comments Chapter 4 INITiate CONTinuous mode enables or disables continuous scanning cycles for the switchbox Name Type Range of Values Default Value lt mode gt boolean ON OFF 1 0 OFF 0 Continuous Scanning Operation Continuous scanning is enabled with the INITiate CONTinuous ON or INITiate CONTinuous 1 command Sending the INITiate IMMediate command closes the first channel in the channel list Each trigger from the trigger source specified by the TRIGger SOURce command advances the scan through the channel list A trigger at the end of the channel list closes the first channel in the channel list and the scan cycle repeats Noncontinuous Scanning Operation Noncontinuous scanning is enabled with the INITiate CONTinuo
24. CH14L 47 o o 22 CH14H cH13L 46 110 21 cH13H cH13G 45 10 20 126 cH12L 44 lo 9 19 cH12H 43 E 18 CH11G 42 10 17 106 CH10L 41 10 16 cHt0H CH9L 40 10 1 15 39 o 14 38 110 13 CH8H cH7 37 lel 12 CH7G 36 10 ol 11 CHec 35 110 01 10 CH6H cH5L 34 o o o CH5G 33 o o 8 CH4G cH4L 32 o z CH3L 31 0 ol 6 cuan cH36 30 5 26 CH2L 29 5 Ol 4 CH1L 28 lo a cH1G 27 o El 2 cuoc 26 lt lel BATH Bank A RT High BATL Bank ART Low Channels 32 47 E f BBTL 50 o o 25 BBTH CH47L 49 o o 24 CH47H CH47G 48 o 23 CH46G CH46L 47 o o 22 CH46H CH45L 46 o 21 CH45H CH45G 45 0 20 CH44G CH44L 44 o 19 CH44H CH43L 43 o 0 18 CH43H CH43G 42 lo 17 cH426 CH42L 41 o 16 CH42H CH41L 40 o 15 CH41H CH41G 39 0 14 40 lt CH40L 38 13 CH40H CH39L 37
25. CLOS groups of sequential channels use ROUT CLOS or any combination of the above Closure Order is Not Guaranteed Closure order for multiple channels with a single command is not guaranteed A list of channels will not all close simultaneously The order channels close when specified from a single command is not guaranteed Use sequential CLOSe commands if needed Special Case of Using Upper Range 99 in the Channel List Specifying the last channel as 99 such as 100 199 automatically closes all channels on the card number specified by cc including tree relays 90 through 94 see following table for tree relay information 80 Switchbox Command Reference Chapter 4 Closing the VSA VSB CS RTA and RTB Tree Relays Tree Relay Channel Name Number Tree Relay Function VSA 90 Connects bank A to the voltage sense bus VSB 91 Connects bank B to the voltage sense bus CS 92 Connects bank B to the current source bus RTA 93 Connects reference thermistor to bank A RTB 94 Connects reference thermistor to bank B Closing VSA and or VSB Tree Relays Closing tree relays VSA and or VSB is typically required for most uses of this multiplexer This connects channels to the voltage sense lines of the analog bus See Figure 4 1 for VSA and VSB connections to the analog bus Closing the CS Tree Relay Closing the CS tree relay connects channels in bank B to the
26. J VOLTAGE SENSE BUS ANALOGBUS VM INPUT ANA CN CY gt H H gt CY bg SARE a AAA Ld i gt LIL gt i ANA 4t GIG i E m ANN A B gt H H gt m bg lt Ll WN i gt L L gt 1 AAA GIG i 100 CURRENT SOURCE BUS VM OI A 44 Switchbox Applications Figure 2 3 Example Two Wire Resistance Measurements Chapter 2 fe E1476A 64 CHANNEL MULTIPLEXER VOLTAGE SENSE BUS ANALOG BUS FRONT PANEL CONNECTOR VM Input C bg 11 bg CURRENT SOURCE BUS TO E1411B OR gt E1326B MULTIMETER TERMINAL MODULE CH00 N VOLTAGE SENSE CHO7 5 S ANA V V V A AAA e VSA CH90 VOLTAGE SENSE BANK CH15 CH16 CH23 CH24 CH31 CH32 gt BANKA i 11 tI VVV E CURRENT 1 SOURCE CH39 CH40 VSB CH91 VOLTAGE SENSE CH47 BANK B CH48 CH55 CS CH92 CURRENT SOURCE BANK CH56 CH63 ANALOGBUS VM INPUT n gt BANKB i WN ANN AAA i TO E1412A OR gt EXTERNAL VM OR OTHER DEVICE AN ANN ANN gt 100 CURRENT SOURCE BUS P Chapter 2 Figure 2 4 Example Four Wir
27. Model Number of a Module 92 Reading the Description of a Module 91 Reading the Error Queue 92 Reading the Operation Status Register 90 Resistance Measurements Four Wire 43 Resistance Measurements Two Wire 43 Scanning Using Bus Triggers 95 Scanning Using External Devices 84 Scanning Using External Triggers 95 Scanning Using TTL VXIbus Triggers 50 Selecting Module for Monitoring 72 Selecting 4 Wire Ohms Mode 85 Selecting the ABUS Port 86 Setting Module to Power on State 92 Setting Ten Scanning Cycles 70 Starting a Single Scan 76 Stopping a Scan with ABORt 69 ID register 104 IEEE 488 2 common commands reference 97 implied commands 66 INITiate subsystem INITiate CONTinuous 75 INITiate CONTinuous 76 INITiate IMMediate 76 interrupts using 56 120 Index L linking commands 67 multiplexer description 11 resetting 107 using multimeter with 109 O OUTPut subsystem OUTPut ECLTrgn STATe 77 OUTPut ECLTrgn STATe 77 OUTPut TTLTrgn STATe 79 OUTPut TTLTrgn STATe 79 OUTPut EXTernal STATe 78 OUTPut EXTernal STATe 78 P parameters 67 program timing and execution 108 programming the multiplexer 31 programming register based 101 R READ registers 104 register vs SCPI programming 101 register based programming 101 registers addressing 101 Device Type 104 ID 104 offset 103 READ 104 Relay Control 105 107 Status Control 105 WRITE 104 relay life 117
28. Risk of electrical shock Indicates the field wiring terminal that must be connected to earth ground before operating the equipment protects against electrical shock in case of fault Calls attention to a procedure practice or condition that could cause bodily injury or death WARNING Calls attention to a procedure practice or Frame E M ground CAUTION condition that could possibly cause damage to SUID DISS neun drame equipment or permanent loss of data WARNINGS The following general safety precautions must be observed during all phases of operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Agilent Technologies assumes no liability for the customer s failure to comply with these requirements Ground the equipment For Safety Class 1 equipment equipment having a protective earth terminal an uninterruptible safety earth ground must be provided from the mains power source to the product input wiring terminals or supplied power cable DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes For continued protection against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT use repaired fuses or short circuited fuse holders
29. Vdc or 120 Vac rms 170 Vac peak Maximum current per channel is 35 mA non inductive Maximum transient voltage is 1300 V peak Exceeding any limit may damage the Multiplexer Module WIRING THE TERMINAL MODULE When wiring to the terminal connectors on the E1476A terminal module do not exceed a 5 mm strip back of insulation to prevent the possibility of shorting to other wiring on adjacent terminals Getting Started 15 CAUTION Setting the Logical Address Switch 16 Getting Started NOTE STATIC ELECTRICITY Static electricity is a major cause of component failure To prevent damage to the electrical components in the multiplexer Observe anti static techniques whenever removing configuring and installing a module The multiplexer is susceptible to static discharges Do not install the multiplexer module without its metal shield attached The logical address for the E1476A multiplexer is set with the Logical Address Switch on the module The logical address switch factory setting for the E1476A is 112 Valid addresses are from 1 to 254 for static configuration the address you set on the switch and address 255 for dynamic configuration The E1476A supports dynamic configuration of the address This means the address is set programmatically by the resource manager when it encounters a module with address 255 that supports dynamic configuration See Figure 1 5 for switch position information When using t
30. a scanning cycle completes Bit 8 has a decimal value of 256 and can be read directly with STAT OPER command see STATus OPERation EVENt for an example The scan complete bit will be reported as bit 7 of the Status Register when itis enabled by the STAT OPER ENAB 256 command Use the GPIB Serial Poll or the IEEE 488 2 Common Command STB to read the Status Register This example monitors bit 7 in the Status Register to determine when the scanning cycle completes The example uses GPIB select code 7 primary address 09 and secondary address 14 for the multiplexer addressed at 70914 10 OUTPUT 70914 CLS IClear to talk to the switch 20 OUTPUT 70914 STAT OPER ENAB 256 ISet so scan complete causes an event 30 OUTPUT 70914 TRIG SOUR EXT ISet to external trigger mode 40 OUTPUT 70914 SCAN 100 163 ISet scan list for 64 channels 50 OUTPUT 70914 INIT IStart scanning cycle 60 WHILE NOT BIT SPOLL 70914 7 unit bit 7 is set 70 PRINT Do other operations here Do other operations until bit 7 is set 80 END WHILE 90 END 54 Switchbox Applications Chapter 2 Recalling and Saving States This section contains information about saving and recalling multiplexer states The SWITCHBOX driver can store up to 10 states Saving States rhe sAv numeric state command saves the current instrument state The state number 0 9 is specified in the numeric state parameter The following settings are saved Channel Relay Stat
31. address is 70914 10 DIM A 256 20 OUTPUT 70914 IDN 30 ENTER 70914 A 40 PRINT A 50 END RUN the program The response should be as follows The device driver revision must be A 08 00 or later HEWLETT PACKARD SWITCHBOX 0 A 08 00 This exercise performs close open and scanning operations and queries the status byte Now that communication with the module has been established you can perform some close open and scan operations and use the SCAN COMPLETE bit in the Status Operation Event register bit 8 Operation Event Register bit 8 designates scan complete when high Reading this register clears the register all bits to zero This bit is monitored by serial polling SPOLL the status byte register bit 7 in line 70 You may want to look at the STATUS command in Chapter 4 which graphically shows the relationship of these two bits and all status registers relating to this module Input this BASIC program into your computer Do not input the comments preceeded by Getting Started 35 DIM A 256 OUTPUT 70914 CLOSE 100 101 102 163 OUTPUT 70914 RST OUTPUT 70914 STAT OPER ENAB 256 OUTPUT 70914 SCAN 100 163 OUTPUT 70914 INIT WHILE NOT BIT SPOLL 70914 7 PRINT WAITING FOR SCAN COMPLETE Dimension array to hold data entered Close all channels Open all channels by resetting module Enable bit 8 of status operation event register Scan all channels Initiate the scan using the defau
32. connections The Terminal Panel provides up to 32 3 wire connections to allow 32 channel connections to the E1476A multiplexer module via the Option A3F terminal module See Figure 1 14 for connection details e E E E1476A Multiplexer Module 7 Option A3F Terminal Module p SCSI Cables Optional Option 001 Board Option A3F Terminal Module 44 1586 Terminal Panel 7 5 SCSI Cables ME To use the E1486 Terminal Panel WITHOUT Optional the Option 001 Board Plug the SCSI Cables Option 001 Board directly into the E1586 Terminal Panel E1586A Terminal Panel X Figure 1 14 Connecting the E1586A Rack Mount Terminal Panel 26 Getting Started Chapter 1 Option A3F Terminal Module As shown in Figure 1 14 E1476A Terminal Module Option A3F allows an E1476A multiplexer module to be connected to an E1586A Rack Mount Terminal Panel This option provides four SCSI plugs on a terminal module to enable connection to a rack mount terminal panel using four terminal modules See Figure 1 15 for the front panel view and connector pinouts of the Option A3F Terminal Module dev NOILdO v92vi3 Channels 00 15 m BATL 50 0 25 BATH CH15L 49 0 ol 24 CH15H CH156 48 o 23 CH146
33. does not support the VXlbus word serial protocol When a SCPI command is sent to the multiplexer the instrument driver resident in the E1406 Command Module parses the command and programs the multiplexer at the register level If SCPI is used to control this module register programming is not recommended The SCPI Driver maintains an image of the card state The driver will be unaware of changes to the card state if you alter the card state by using register writes Register based programming is a series of reads and writes directly to the multiplexer registers This increases throughput speed since it eliminates command parsing and allows the use of an embedded controller Also register programming provides an avenue for users to control a VXI module with an alternate VXI controller device and eliminate the need for using an E1406 Command Module Register Addressing Appendix B Register addresses for register based devices are located in the upper 2596 of VXI A16 address space Every VXI device up to 256 devices is allocated a 32 word 64 byte block of addresses With eight registers the E1476A multiplexer uses eight of the 64 addresses allocated Figure B 1 shows the register address location within A16as it might be mapped by an embedded controller Figure B 2 shows the location of A16 address space in the E1406 Command Module Register Based Programming 101 The Base Address A16 Address Space Outside the Command Whe
34. first error encountered Does not return multiple errors The following is a list of responses you can obtain where cc is the card number with the leading zero deleted 0 if self test passes cc01 for firmware error cc02 for bus error problem communicating with the module cc03 for incorrect ID information read back from the module s ID register 05 for hardware and firmware have different values Possibly a hardware fault or anoutside entity is register programming the E1476A cc10 if an interrupt was expected but not received cc11 if the busy bit was not held for a sufficient amount of time WAI Wait to Complete Chapter 4 Switchbox Command Reference 97 Notes 98 Switchbox Command Reference Chapter 4 Appendix A Specifications General Input Characteristics Module Size Device Type C Size VXIbus Register based A16 D16 Interrupt Level 1 7 selectable Connectors Used P1 and P2 Relay Life typical Condition Number of Operations Single Levels Load 500 x 107 Full Load 5x 107 Relays are subject to normal wearout based on the number of operations Power up and Power down States all relays open Reference Junction Measurement Accuracy 18 to 28 C operating 0 38 C Terminal Wire Size 22 26AWG Power Requirements Voltage 5 12 Peak Module Current A 0 80 0 01 Dynamic Module Current A 0 40 0 00 1 0A with all relays energized Watts slot 4 Cooling slot 0
35. for guidelines to connect the E1586A Terminal Panel to the E1476A Option A3F terminal modules The E1586A Rack Mount Terminal Panel Terminal Panel provides extended connections to the E1476A multiplexer module Since the Terminal Panel is used in place of the standard E1476A terminal module all operations in Chapter 2 except temperature measurements apply to the Terminal Panel However since the Terminal Panel has three thermistors to make reference temperature measurements reference temperature measurements are different than for the standard E1476A terminal module All channel and Analog Bus connections to make measurements have corresponding connections on the Terminal Panel The following sections describe channel and analog bus connections to the Terminal Panel and connections for reference temperature measurements Chapter 1 Channel Connections Channels on the Terminal Panel correspond directly to channels on the E1476A terminal module For example the channel 2 H L and G connections on the E1476A multiplexer have corresponding channel 2 H L and G connections on the Terminal Panel Since a single Terminal Panel has a total of 32 channels two Terminal Panels are required to make connections to all channels of the E1476A multiplexer The Bank A channels 00 31 connect to channels 0 31 on the first Terminal Panel and the Bank B channels 32 63 connect to channels 32 63 shown in parentheses of the second Terminal Panel F
36. lower case Commands letters The upper case letters indicate the abbreviated spelling for the command For shorter program lines send the abbreviated form For better program readability you may send the entire command The instrument will accept either the abbreviated form or the entire command For example if the command syntax shows MEASure then MEAS and MEASURE are both acceptable forms Other forms of MEASure such as MEASU or MEASUR will generate an error You may use upper or lower case letters Therefore MEASURE measure and MeASUrE are all acceptable Implied Implied commands are those which appear in square brackets in the command Commands syntax The brackets are not part of the command and are not sent to the instrument Suppose you send a second level command but do not send the preceding implied command In this case the instrument assumes you intend to use the implied command and it responds as if you had sent it Examine the partial ROUTe subsystem shown below ROUTe CLOSe channel list CLOSe lt channel list OPEN channel list OPEN channel list SCAN channel list MODE mode MODE The root command ROUTe is an implied command To close relays in a channel list you can send either of the following command statements ROUT CLOS 100 107 201 225 or CLOS 100 107 201 225 These commands function the same closing channels 00 through 07 on card 1 and channels 01 and 25 o
37. resetting the multiplexer 107 restricted rights statement 7 ROUTe subsystem ROUTe CLOSe 80 ROUTe CLOSe 81 ROUTe JOPEN 82 ROUTe JOPEN 83 ROUTe SCAN 83 ROUTe SCAN MODE 85 ROUTe SCAN MODE 86 ROUTe SCAN PORT 86 S safety symbols 8 SCPI commands command format 65 command reference 67 commands quick reference 96 specifications 99 Status Control register 105 STATus subsystem STATus OPERation CONDition 89 STATus OPERation ENABle 89 STATus OPERation ENABle 89 STATus OPERation EVENt 90 STATus PRESet 90 SYSTem subsystem SYSTem CDEScription 91 SYSTem CPON 91 SYSTem CTYPe 92 SYSTem ERRor 92 status system 88 I terminal panel configuring 28 connecting 28 HF common mode filters 28 interconnect cables 28 TRIGger subsystem TRIGger SOURCce 94 TRIGger SOURce 95 TRIGger IMMediate 93 U using interrupts 56 using multimeter with multiplexer 109 warnings 8 warranty statement 7 WRITE registers 104 Index 121
38. scan and to make measurements To do this example you will need the following items See Figure 3 2 for equipment configuration E1411B multimeter E1476A multiplexer 2 5 inch Analog Bus cable E1400 61605 Zero Ohm jumpers such as paper clips Resistors any value Command E1411B b Module Analog Bus Cable E1400 61605 E1411B 1476 ge Multimeter Multiplexer a 1 i o LJ E1476A Multiplexer Module E Figure 3 2 Scanning Voltmeter Equipment Configuration Since the E1411B multimeter and E1476A multiplexer form a scanning voltmeter configuration the E1476A must have a logical address that is sequential to the E1411B Also the E1411B must be at an instrument address logical address divisible by 8 Set the E1411B to logical address 24 secondary address is 24 8 03 and the E1476A to logical address 25 The modules must be installed in adjacent slots with the multiplexer to the right of the multimeter The scanning voltmeter is addressed from GPIB interface 7 or the interface you use instead of 7 primary address 09 and secondary address 03 The scanning voltmeter address is 70903 and the multimeter controls the multiplexer module 60 Scanning Voltmeter Applications Chapter 3 As required set the E1411B multimeter to logical address 24 and the E1476A multiplexer to logical address 25 Next install the ins
39. the sse 19 Terminal Module RR nd 19 9 sonaren inene 21 Attaching a Terminal Module to the Multiplexer 23 Connecting he Analog BUS pies t 24 Configuring the E1586A Rack Mount Terminal 26 Conneciing the Terminal Panel T D OMIT 26 Configuring the Terminal Panel NE 28 Programming the 31 Addressing the Multiplexer d C S ERR SR ROS 31 argo cc 33 cn Ne PL 34 Chapter 2 Switchbox Applications nennt 39 CECI mete t 39 SSVI DSN Me 39 OCHO PASS pid 40 Multiplexer Reset onions usi ox er dar o HP ot 40 41 Switching Channels to the Analog Bus 41 Example Connecting a Channel to the Analog Bus 42 Example Two Wire Resistance Measurements 43 Example Four Wire Resistance Measurements 43 Example Temperature Measurements 46 Scanning TT 48 Scanning Channels Using the Analog Bus
40. the mainframe The extraction levers may be used to guide or remove the multiplexer To remove the multiplexer from the mainframe reverse the procedure Figure 1 7 Installing the Multiplexer Module in a VXIbus Mainframe 18 Getting Started Chapter 1 Configuring the Terminal Module This section gives guidelines to configure the terminal module including Terminal Module Descriptions Wiring Terminal Modules Attaching a Terminal Module to the Multiplexer Connecting the Analog Bus Terminal Module 1476A 64 Channel 3 Wire Multiplexer module consists of a Descriptions multiplexer switch card and a spring clamp type terminal module The Screwless terminals use a spring clamp terminal for connecting solid or stranded wire Connection is made with a push of a three pronged insertion tool part number 8710 2127 that is shipped with the multiplexer If the spring clamp type terminal module is not desired a crimp and insert terminal module Option A3E and an interface to rack mount terminal panel Option A3F are available See Configuring the E1586A Rack Mount Terminal Panel for details on using Option A3F Standard Terminal Figure 1 8 shows the E1476A spring clamp standard terminal module Module connectors and associated channel numbers See Multiplexer Front Panel for the connector pin outs that mate to to terminal module PF mm T Eerme Eee m TTT
41. the module RST command all channels are open A RST command invalidates the current scan list and you must specify a new scan list Command parameters are set to the default conditions in Table 1 2 Table 1 2 E1476A Default Conditions Parameter Default Description ARM COUNt 1 Number of scanning cycles is one TRIGger SOURce IMM Advances through a scanning list automatically INITiate CONTinuous OFF Number of scanning cycles is set by ARM COUNt OUTPut STATe OFF Trigger output from EXT TTL or ECL sources is disabled ROUTe SCAN MODE NONE Channel list is set up for volts measurement ROUTe SCAN PORT NONE Analog bus connections are disabled from channels Execute SCAN PORT ABUS to enable use of the analog bus for the SCAN command A CLOSe command requires that you also close the appropriate tree relay to make connection to the analog bus Getting Started 33 Start Up Exercises NOTE Exercise 1 Check Device Driver E1406 Only 34 Getting Started This section provides five start up exercises you can use to get the E1476A 64 Channel 3 Wire Multiplexer module operational including Exercise 1 Check Device Driver E1406 only Exercise 2 Query Module Identity Exercise 3 Perform Open Close and Scan Operations Exercise 4 Check for System Errors Exercise 5 Make Scanning Voltmeter Measurements We recommend you do not make user connections to
42. tree relays channels 90 through 94 These are not typical scan channels and are not included in a scan list You can however include channel 93 in a scan list e g 100 193 when making a four wire resistance measurement The only restriction is that SCAN MODE must be FRES four wire resistance for channel 93 the voltage sense The current source channel is 94 and is automatically switched Some example channel lists ranges follow Chapter 1 CLOS 100 112 OPEN 203 210 OPEN 100 163 SCAN 100 163 SCAN 100 199 SCAN 100 223 Channel Lists Channel Ranges SCAN 100 104 200 204 300 Default Conditions Chapter 1 Close channels 00 and 12 on card 01 Open channels 03 and 10 on card 02 Open all channels on card 01 Scan all channels on card 01 Scan all channels on card 01 Scan all channels on card 01 and channels 00 through 23 on card 02 Scan channels 0 through 4 on card 1 scan channels 0 through 4 on card 2 and scan channel 0 on card 3 If you want to use the E1476A as a switchbox or scanning voltmeter instrument using SCPI commands you must first install the appropriate device driver into the E1406 Command Module For switchbox applications install SWITCH driver Rev A 08 00 or later For scanning voltmeter applications install VOLTMTR driver Rev A 06 00 or later See Start Up Exercises for procedures to install device drivers At power on or following a reset of
43. via GPIB This example uses the E1406 Command Module Trig Out port to synchronize the E1476A Multiplexer module in a switchbox configuration to the 3457A multimeter The trigger pulse from the Trig Out port triggers the 3457A multimeter for a measurement See Chapter 2 for typical user connections to the multiplexer The addresses used are 70900 for the E1406 Command Module 722 for the 3457A Multimeter and 70914 for the E1476A Multiplexer 10 OUTPUT 722 TRIG EXT DCV Multimeter to ext trig and measure dc volts 20 OUTPUT 70914 OUTP ON Enable Trig Out port on cmd module 30 OUTPUT 70914 TRIG SOUR BUS Set switchbox to receive Bus triggers 40 OUTPUT 70914 SCAN MODE VOLT Set switchbox to measure voltage 50 OUTPUT 70914 SCAN PORT ABUS during scanning Set switchbox to close the appropriate tree relays during scanning 60 OUTPUT 70914 SCAN 100 163 Select the channel list 70 OUTPUT 70914 INIT Start scanning cycle 80 FOR I 1 TO 64 Start count loop 90 ENTER 722 A Enter multimeter reading into A 100 PRINT A Print reading in A 110 TRIGGER 70914 Trigger the switchbox to advance the channel list 120 NEXT I Increment count 130 END 84 Switchbox Command Reference Chapter 4 ROUTe SCAN MODE Parameters Comments Example Chapter 4 ROUTe SCAN MODE mode sets the multiplexer channels defined by the ROUTe SCAN channel list command for none volts two wire ohms or four wire ohms measurements
44. when it has finished closing or opening The address of the multiplexer Status Register is base 04 6 The address of the channel is the base address plus the channel offset Multiplexer Status Register bit 7 the BUSY bit is monitored to determine when a multiplexer channel can be closed or opened and when a channel has finished closing or opening i ES START Check Multiplexer Status Register Bit 7 Busy Close Multiplexer Channel Check Multiplexer Status Register Bit 7 Busy Ss Figure B 3 Closing Opening a Multiplexer Channel 108 Register Based Programming Appendix B Using a Multimeter rhis flowchart shows the timing sequence between closing an E1476A with the Multiplexer multiplexer channel and triggering an E1326 E1411 multimeter E START UN Check Multiplexer Status Register Bit 7 Busy Close Multiplexer Channel Check Multiplexer Status Register Bit 7 Busy Check DMM Status Register Bit 0 Cmd Parm Ready Write Trigger Opcode to DMM Command Register Check DMM Status Register Bit 5 MM Comp Wait for Measurement s to Complete Have all Channels been Measured Retrieve Readings From DMM Data Buffer Appendix B Figure B 4 Program Timing Between Multiplexer and Multimeter The registers used are Multiplexer Multiplexer Status Regist
45. whichever is applicable You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Agilent standard software agreement for the product involved Agilent Technologies E1476A 64 Channel 3 Wire Multiplexer Module User s Manual Edition 5 Copyright O 1994 1996 2000 Agilent Technologies Inc All rights reserved Documentation History All Editions and Updates of this manual and their creation date are listed below The first Edition of the manual is Edition 1 The Edition number increments by 1 whenever the manual is revised Updates which are issued between Editions contain replacement pages to correct or add additional information to the current Edition of the manual Whenever a new Edition is created it will contain all of the Update information for the previous Edition Each new Edition or Update also includes a revised copy of this documentation history page Edition EE June 1994 Edition et ete ie edere cde tenes February 1996 te eked oad ose RI Maes March 1996 Edition A reines eu e Re mee ever n QE May 1996 Editioti3 i Seen Dp arida isque November 2000 Safety Symbols Instruction manual symbol affixed to product Indicates that the user must refer to Alternating current AC the manual for specific WARNING or CAUTION information to avoid personal injury or damage to the product a Direct current DC Warning
46. 1 SENSE 5K OHM i REFERENCE REF THERMISTERRELAYS 1 THERMISTOR RTB CH94 I SOURCE 1 SHIH gt o o LIL 1 cle i 1 1 VSB CH91 VOLTAGE SENSE RNC 32 CH32 CH63 32 e oco gt H H gt oo LIL SS Y ot G G 1 1 1 CS CH92 CURRENT SOURCE E 1 1 1 xc 1 1 VOLTAGE SENSE BUS ANALOG BUS VM INPUT M ANN CA CA gt H H gt UE ANN H I RS 1 GIG z 1 1412 E EXTERNAL VM OR ANN C L4 CA OTHER DEVICE M I HUP I ANN c 27 6 e o L 100 CURRENT SOURCE BUS VM QI Figure 2 2 Example Connecting a Channel to the Analog Bus 42 Switchbox Applications Chapter 2 Example Two Wire This example illustrates three wire switching and a method for making Resistance accurate 2 wire resistance measurements The E1476A analog bus contains current limiting protection resistors that can introduce Measurements measurement error if the measuring instrument does not have a suitable high impedance This example describes a method to make measurements that avoids the protection resistors Making two wire measurements from the analog bus requires the internal bus protection resistors which will introduce about 100 per lead to the resistance measurement Use Channel 00 as the common terminals to make two wire measurements from channels 01 through 31 on bank A Close tree relays VSA and VSB channels 90 and 91 to conn
47. 10 mm H O 0 30 Liter sec for 10 C rise Operating Temperature 0 55 C Operating Humidity 65 RH 0 40 C Maximum Input Voltage 120 Vdc or acrms Terminal to Terminal 120 Vdc or acrms Terminal to Chassis Maximum Current per Channel non inductive 35 mA Maximum Switchable Power per Channel 4VA DC Performance Thermal Offset per Channel lt 4uV lt 2uV 10 samples averaged Closed Channel Resistance 100Q 50 Insulation Resistance between any two points gt 109 W at lt 40 C 95 RH AC Performance Closed Channel Capacitance lt 175 pF H L lt 300 pF L G lt 1500 pF G C Minimum Bandwidth 3dB 50Q source load 100 kHz Crosstalk db Channel to Channel 70 100kHz 45 10 MHz Appendix A Specifications 99 Notes 100 Specifications Appendix A Appendix B Register Based Programming Using This Appendix This appendix contains information you can use for register based programming of the E1476A 64 Channel 3 Wire Multiplexer including Register Programming vs SCPI Programming 101 e Register 55 101 Register 104 Program Timing and Execution 108 Programming 110 Register Programming vs SCPI Programming NOTE The E1476A is a register based module which
48. 3 2 lists the parameters and default values for the multiplexer module functions following power on or reset These are not accessible to you via the VOLTMTR driver but are provided so you will know the multiplexer module condition after power on or following a reset Table 3 2 E1476A Default Conditions for Power on and Reset Parameter Default Description ARM COUNt 1 Number of scanning cycles is one TRIGger SOURce IMM Advances through a scanning list automatically INITiate CONTinuous OFF Number of scanning cycles is set by ARM COUNt OUTPut STATe OFF Trigger output from EXT TTL or ECL sources is disabled ROUTe SCAN MODE NONE Channel list is set for volts measurement ROUTe SCAN PORT NONE Analog bus connections are disabled from channels Channel state All 64 channels are open channels 00 63 Tree relay state All tree relays are open channels 90 94 Channel list from SCAN Current channel list is invalidated following a command after RST reset of the module with RST command Chapter 3 Scanning Voltmeter Applications 59 Scanning Voltmeter Measurements Configuring the Scanning Voltmeter This section provides an example program for making voltage 2 wire ohms 4 wire ohms and thermocouple or thermistor temperature measurements with a scanning voltmeter configuraton The multimeter E1326 E1411 MEASure command is used to specify the channel list to
49. 616 Tree Relays 90 through 94 Control Register base 2816 The READ voucan read the following multiplexer registers Registers Manufacturer ID Register base 0016 Device Type Register base 0216 Status Control Register base 04156 Channels 0 through 15 Relay Control Register base 2016 Channels 16 through 31 Relay Control Register base 2216 Channels 32 through 47 Relay Control Register base 2416 Channels 48 through 63 Relay Control Register base 2616 Tree Relays 90 through 94 Control Register base 28 6 The ID Register Reading the ID register returns indicating the manufacturer is Hewlett Packard and the module is an A16 register based device See Programming Example to see how to read the ID Register bass 15 14 13 12 10 9 8 7 6 5 4 3 2 1 0016 Write Undefined Read Manufacturer ID returns FFFF in Hewlett Packard A16 only register based card The Device Type Reading the Device Type Register returns 021816 which identifies the Register device as the E1476A 64 Channel Multiplexer See Programming Example to see how to read the Device Type Register base 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Write Undefined Read 021816 104 Register Based Programming Appendix B The Status Control Writes to the Status Control Reg
50. 64 channels are needed This also requires two E1586A Rack Mount Terminal Panels since a single terminal panel only connects 32 channels The cables do not come with the E1476A Option A3F and must be ordered separately The cables are Standard Cable This cable E1588A is a 16 channel twisted pair cable with an outer shield and is suitable for relatively short cable runs Custom Length Cable This cable 72220 Option 050 is available in custom lengths It is a 16 channel twisted pair cable with each twisted pair individually shielded to provide better quality shielding for longer cable runs Optional high frequency common mode filters are available for the E1586A Rack Mount Terminal Panel input channels These filters filter AC common mode signals in the cable that connects the terminal panel and the device under test These filters are useful for filtering small common mode signals below 5Vp p To order these filters order E1586A Option 001 The E1586A Terminal Panel can be mounted in a standard size instrument rack To minimize temperature gradients across the panel the panel should be mounted in the rack such that it is away from the other heat sources The bottom of the rack is usually the preferred location Take particular care to minimize the temperature differences across the horizontal width of the Terminal Panel since it is most susceptible to horizontal temperature gradients across its longest dimension See Figure 1 13
51. 76A module 4 Push in the extraction levers A to lock the terminal module onto the E1476A module Extraction Levers VIS Qe To remove the terminal module from the E1476A use a small screwdriver to release the two extraction levers and push both levers out simultaneously to free it from the multiplexer Figure 1 11 Steps to Attach a Terminal Module to the Multiplexer Getting Started 23 Connecting the Analog Bus Conn ecting to a Multimeter NOTE The analog bus provides a common bus to all switch modules in a switchbox or scanning voltmeter to which a single voltmeter can be connected You must connect the flat ribbon analog bus cables between multiplexers and other VXI modules that have an analog bus both C size modules or B size modules in a C size adapter E1411B 5 Digit Multimeter users and E1326B in a C size adapter must continue the analog bus connection between multiplexers and switch modules to the multimeter to use the scanning and measurement capability of the multimeter These cables provide the input to the multimeter from the multiplexer switch channels See Figure 1 12 for connection details Use the 19 5 inch analog bus cable part number E1326 61611 for analog bus connection between an E1326B and the E1476A Analog Bus Cables E1400 61605 ANALOG BUS E1411B Multimeter Command E1411B UN Module
52. ATus OPERation ENABle lt unmask gt sets an enable mask to allow events recorded in the Event Register to send a summary bit to the Status Byte Register bit 7 For multiplexer modules when bit 8 in the Operation Status Register is set to 1 and that bit is enabled by STATus OPERation ENABle bit 7 in the Status Register is set to 1 Name Type Range of Values Default Value lt unmask gt numeric 0 through 65 535 N A Setting Bit 7 of the Status Byte Register STATus OPERation ENABle 256 sets bit 7 of the Status Byte Register to 1 after bit 8 of the Operation Status Register is set to 1 Related Commands ROUTe SCAN Enabling Operation Status Register Bit 8 STAT OPER ENAB 256 Enable bit 8 of the Operation Status Register to be reported to bit 7 OPR in the Status Byte Register STATus OPERation ENABle Chapter 4 Comments Example STATus OPERation ENABle returns which bits in the Event Register Operation Status Group are unmasked Output Format Returns a decimal weighted value from 0 to 65 535 indicating which bits are set to true Maximum Value Returned The value returned is the value set by the STAT OPER ENAB lt unmask gt command However the maximum decimal weighted value used in this module is 256 bit 8 set to true Query the Operation Status Enable Register STAT OPER ENAB Query the Operation Status Enable Register Switchbox Command Reference 89 STATus OPERation EVENt Com
53. CAN PORT 86 C continued commands cont d STATus OPERation CONDition 89 STATus OPERation ENABle 89 STATus OPERation ENABle 89 STATus OPERation EVENt 90 STATus PRESet 90 SYSTem CDEScription 91 SYSTem CPON 91 SYSTem CTYPe 92 SYSTem ERRor 92 TRIGger SOURce 94 TRIGger SOURce 95 TRIGger IMMediate 93 common commands CLS 97 ESE 97 ESE 97 ESR 97 IDN 97 OPC 97 OPC 97 RCL 97 RST 97 SAV 97 SRE 97 SRE 97 STB 97 TRG 97 TST 97 WAI 97 format 65 reference 97 D declaration of conformity 9 Device Type register 104 DISPlay subsystem DISPLay MONitor CARD 72 DISPLay MONitor CARD 73 DISPLay MONitor STATe 73 DISPLay MONItor STATe 74 documentation history 8 Index 119 E error messages 115 error types 115 117 examples Advancing Scan Using TRIGger 93 Closing Multiplexer Channels 81 Connecting a Channel to the Analog Bus 42 Enabling Continuous Scans 76 Enabling Monitor Mode 74 Enabling Operation Status Register Bit 8 89 Enabling Trig Out Port 78 Enabling TTL Trigger Bus Line 79 Opening Multiplexer Channels 83 Querying Continuous Scanning State 76 Querying Multiplexer Channel Closure 82 Querying Multiplexer Channel Open State 83 Querying Number of Scanning Cycles 71 Querying Scan Mode 86 Querying Operation Status Enable Register 89 Querying Trig Out Port State 78 Querying TTL Trigger Bus Enable State 79 Querying the Trigger Source 95 Reading
54. EGISTER MAP Base Address COOO1 Logical Address 64 16 0000 or 49 152 Logical Address 64 49 102 Register Based Programming Figure B 1 Registers Within A16 Address Space Appendix B A16 Address Space Inside the Command Module or Mainframe When the A16 address space is inside the E1406 Command Module Figure B 2 the multiplexer s base address is computed as 1FC000 LADDR 64 6 or 2 080 768 LADDR 64 1FC000 6 2 080 768 is the starting location of the VXI A16 addresses LADDR is the multiplexer s logical address and 64 is the number of address bytes per register based device The multiplexer s factory set logical address is 112 if this address is not changed the multiplexer will have base address of 1 000 112 64 6 1FC000 6 1 0016 1FDCO00 g or 2 080 768 112 64 2 080 768 1536 2 087 936 if FFFFFF 16 46 200000 6 1F0000 6 00000016 E E1406 REGISTER ADDRESS MAP OFFSET 16 BIT WORDS 3C4s 200000 1g gt IFCOOO BS 2816 Tree Relay Control Register 16 Ne 200000 16 2646 Bank B Control Register 2416 Bank B Control Register A16 2246 Bank A Control Register A24 ADDRESS REGISTER 2016 Bank Control Register ADDRESS SPACE ADDRESS e SPACE N SPACE e 0446 Status Control Register IFOOOO 46 16 S 0216 Device Type Register 2 080 768
55. ERO CONDI Ent be d Rt tk pap 89 STATus OPERtGIRENABIe toritate rrt aero iE ere p pL DE 89 STATUS DPERation EMNABIGT kk ke E SPA RAE Rp M A EAR 89 STATus OPERation EVENTI 90 S AUO PRES OT dt Eel Ced OU etl dd AY IUD ARE DILE SUE 90 XGA TEE o EDD LIS 91 ST S Tem auia opi il op Dep oe dtd 91 ae kl ecc 91 AM 92 te e cT 92 Elta PE 93 Eis GRISE US ETE 93 TROTT e H 94 E OUR rs EE 95 SCPI Commands Quick de o su board Ebr d aad Edo i S ROO ER 96 IEEE 489 2 Common Commands Reference 97 Appendix Specificaliolis 99 Appendix B Register Based Programming 101 c 101 Register Programming vs 5 101 FRIST ddr a ardet toon etti td edo Col tdi dei oo tn OR 101 TORREA NOS mt T 102 Descrip eoira 104 The NRE PE m TU 104 READ 104 det Er 104 The Device Type BOISE dx IU ad d X OH c a a ta 104 a 105 ai tope flap 105 Progra
56. F Agilent Technologies E1476A 64 Channel 3 Wire Multiplexer Module User s Manual GEB Agilent Technologies Manual Part Number E1476 90005 Printed September 2012 Printed in Malaysia E0912 NOTICE In August 2014 Agilent Technologies former Test and Measurement business became Keysight Technologies This document is provided as a courtesy but is no longer kept current and thus will contain historical references to Agilent For more information goto www keysight com KEYSIGHT TECHNOLOGIES Contents E1476A 64 Channel 3 Wire Multiplexer Module User s Manual Git dg TIU 7 Agilent Technologies Warranty Statement eieeeeeiiieee nente nhanh ninth nnn naue nnde 7 U S Govermimasnt Restrieted BS 7 cci E Lee 8 PEN 8 Docuit tUm SC REBATE Mo 8 Declaran Or fp enr e 9 Chapter 1 Getting Started 1 erre eater 11 BIDEN RAICES S LEE 11 Niuluplexer 11 eee dB 12 Multiplexer Front Fant 13 Moltplexer ConiiguralonS Pe 14 Configuring CE ecl M 15 Vans id CUI BAISER ERAN RMA 15 Setting the Logical Address ior opta ar phai op 16 Prion dq OST 17 Installing the Multiplexer in a Mainframe seem 18 Gonfiguring
57. M COUNt1 Setting Ten Scanning Cycles ARM COUN 10 Set 10 scanning cycles SCAN 100 115 Set channel list INIT Start scanning cycle ARM COUNt lt MIN MAX gt returns the current number of scanning cycles set by ARM COUNt If a value between MIN and MAX is set that value for ARM COUNt is returned The optional parameters MIN and MAX allow you to query the module for these values instead of looking them up in the command reference 1 is returned for the MIN parameter 32767 is returned for the MAX parameter regardless of the ARM COUNt value set 70 Switchbox Command Reference Chapter 4 Parameters Comments Chapter 4 Example Name Type Range of Values Default Value MIN MAX numeric MIN 1 MAX 32 767 current cycles Related Commands INITiate IMMediate Query Number of Scanning Cycles ARM COUN 55 Set 10 scanning cycles ARM COUN Query number of scanning cycles returned value is 55 Switchbox Command Reference 71 DISPlay The DISPlay subsystem monitors the channel state of a selected module or card in a switchbox The DISPlay command subsystem only operates with a RS 232 terminal connected to an E1406 Command Module RS 232 port These commands control the display on the terminal and would in most cases be typed directly from the terminal keyboard However itis possible to send these commands over the GPIB interface and control the terminal s display In this case care m
58. MM TTLTrgO TTLTrg7 Specify trigger source SOURce Query trigger source Chapter 3 Scanning Voltmeter Applications 63 Command Title Description RST Reset FUNC VOLT DC APER 16 7 ms 20 ms CAL ZERO AUTO ON NPLC 1 VOLT RANG 8V VOLT RES 7 629 mV RANGE AUTO ON RES RANG 16384 W RES RES 15 6m W RES COMP OFF TRIG COUN 1 TRIG DELAY AUTO ON TRIG SOUR IMM SAMP COUN 1 SAMP SOUR IMM SAMP TIM 200 ms Sets the multimeter and associated multiplexers Sets TRG Bus Trigger When the multimeter is in the wait for trigger state and the trigger source is TRIGger SOURce BUS use the TRG command to trigger the multimeter TST Self Test Technologies for repair Should return 0 If code 1 2 3 or 4 occurs return the multimeter to Agilent 64 Scanning Voltmeter Applications Chapter 3 Chapter 4 Switchbox Command Reference Using This Chapter This chapter describes Standard Commands for Programmable Instruments SCPI and summarizes IEEE 488 2 Common commands applicable to the E1476A 64 Channel 3 Wire Relay Multiplexer module when used in the switchbox configuration including Command 65 SCPI Command 67 SCPI Command Quick 96 IEEE 488 2 Common Command Reference 97 Command Types Common Commands Format SCPI
59. N MAX Query amount of VME memory used VME STATe mode Direct readings to VME memory card VME STATe Query VME memory mode OUTPut TILTgO 1 2 3 4 51 6 7 STATe OFFJO 1 Send VM compl to VXIbus trigger lines TTLTrg0 111213141516 7 STATe Query voltmeter complete destination READ Place multimeter in wait for trigger state Place readings in output buffer 62 Scanning Voltmeter Applications Chapter 3 Command Description SAMPIe COUNt 1 16777215 MIN Set number of readings per trigger COUNt MIN MAX Query number of readings per trigger SOURce IMM TIM Set pacing source SOURce Query pacing source TIMer 76 ms 65 534 ms MIN MAX Define period between readings TIMer MIN MAX Query period between readings SENSe FUNCtion lt function Select measurement function FUNCtion Query measurement function RESistance APERture lt time gt MIN MAX Set aperture integration time in sec RESistance APERture MIN MAX Query aperture integration time RESistance NPLC lt number MIN MAX Set integration time in PLCs RESistance NPLC MIN MAX Query integration time RESistance OCOMpensated OFF 0 ON 1 Enable disable offset compensation RESistance OCOMpensated Query offset compensation mode RESistance RANGe range MIN MAX Select range RESistance RANGe MIN MAX Query range RESistance RANGe AUTO OFF 0 ON 1 Enable disable autorange function RESista
60. OUTPUT Voltmeter TRIG SOUR TTLT2 OUTPUT Voltmeter OUTP TTLT1 ON OUTPUT Voltmeter TRIG COUN 64 OUTPUT Voltmeter OPC ENTER QVoltmeter Opc value OUTPUT QGVoltmeter INIT OUTPUT Switchbox RST CLS OUTPUT Switchbox OUTP TTLT2 ON OUTPUT Switchbox TRIG SOUR TTLT1 OUTPUT Switchbox SCAN MODE RES OUTPUT Switchbox SCAN PORT ABUS OUTPUT Switchbox SCAN 100 163 OUTPUT Switchbox OPC ENTER Switchbox Opc_value OUTPUT Switchbox INIT OUTPUT Voltmeter FETC ENTER Voltmeter Results PRINT Results OUTPUT Switchbox RST END Assign switchbox logical address Assign multimeter logical address Dimension array for readings IReset multimeter clear status system IConfigure for 2 wire Ohms ISet multimeter to receive trigger from TTLT2 tOutput VM Complete on TTLT1 line lAccept 64 triggers until multimeter is ready IFetch the OPC response Unitialize multimeter ser wait for trigger IReset switchbox clear status system Enable switchbox trigger output TTLT2 ISet for TTLT1 trigger input ISet multiplexer for 2 wire Ohms Enable analog bus tree relay control Iduring scan ISet 64 channel scan list until switch is ready IFetch the OPC response nitialize multiplexer scan Transfer readings to output buffer Read all 64 readings from multimeter IPrint the Results array all 64 readings Reset multiplexer to open all channels Switchbox Applications 51
61. Put ECLTrgn STATe OUTPut ECLTrgn STATe queries the state of the ECL trigger bus line specified by n 1 is returned if the line is enabled a 0 is returned if it is disabled Valid values for n are 0 and 1 Chapter 4 Switchbox Command Reference 77 OUTPut EXTernal STATe OUTPut EXTernal STATe mode enables or disables the Trig Out port on the E1406 command module OUTPut EXTernal STATe ON 1 enables the port and OUTPut EXTernal STATe OFF O disables the port Parameters Name Type Range of Values Default Value lt mode gt boolean ON OFF 1 0 OFF 0 Comments Abbreviated Syntax OUTPut subsystem commands EXTernal and STATe are optional subcommands The OUTPut command can be abbreviated by executing OUTPut ON or OUTPut OFF Enabling Trig Out Port When enabled the Trig Out is pulsed each time a channel is closed during scanning When disabled the Trig Out is not pulsed The output pulse is a 5 V negative going pulse Trig Out Port Shared by Switchboxes Once enabled the Trig Out port may be pulsed by the switchbox each time a channel is closed in a switchbox during scanning To disable the output for a specific switchbox send the OUTPut EXTernal STATe OFF or OUTPut EXTernal STATe 0 command for that switchbox The OUTP OFF command must be executed following use of this port to allow other instrument drivers to control the Trig Out port
62. R device driver and the E1411B multimeter command reference The multimeter s command quick reference from the E1326 E1411 572 Digit Multimeter User s Manual is provided at the end of this chapter for your convenience See the multimeter manual for detailed descriptions of the commands The analog bus provides access to all three wires of the channel High Low and Guard Access is through the front panel analog bus connector which is used to connect to other multiplexers and to the E1411 or E1326 multimeter See Figure 1 1 in Chapter 1 for a schematic representation of the scanning voltmeter using the E1411B multimeter with an E1476A multiplexer The analog bus is connected from multiplexer to multiplexer in multiple module scanning voltmeter instruments to provide a continuous bus for the instrument 58 Scanning Voltmeter Applications Chapter 3 Reset Conditions This section describes the power on and reset condition the E1476A multiplexer module is in when a scanning voltmeter reset occurs The VOLTMTR device driver controls both the voltmeter and any switch module configured with it in a scanning voltmeter configuration At power on or following the reset of a scanning voltmeter RST command sent to the voltmeter address all 64 channels and all tree relays are open In addition after a RST command the current scan channel list is invalidated See the E1326 E1411 User s Manual for the reset conditions of the multimeter Table
63. Related Commands ROUTe SCAN TRIGger SOURce RST Condition OUTPut EXTernal STATe OFF port disabled Example Enabling Trig Out Port OUTP ON Enable Trig Out port for pulse output OUTPut EXTernal STATe OUTPut EXTernal STATe queries the present state of the Trig Out port on the E1406 Command Module The command returns 1 if the port is enabled or 0 if disabled Example Query Trig Out Port State OUTP ON Enable Trig Out port for pulse output OUTP STAT Query port enable state 78 Switchbox Command Reference Chapter 4 OUTPut TTLTrgn STATe Parameters Comments Example OUTPut TTLTrgn STATe mode selects and enables which TTL Trigger bus line 0 to 7 will output a trigger when a channel is closed during a scan This is also used to disable a selected TTL Trigger bus line n specifies the TTL Trigger bus line 0 to 7 and mode enables ON or 1 or disables OFF or 0 the specified TTL Trigger bus line Name Type Range of Values Default Value n numeric 0 to 7 N A mode boolean ON OFF 1 0 OFF 0 When OUTPut TTLTrgn STATe ON is set a trigger pulse occurs each time a channel is closed during a scan Related Commands ROUTe SCAN TRIGger SOURCe OUTPut TTLTrgn STATe RST Condition OUTPut TTLTrgn STATe OFF disabled Enabling TTL Trigger Bus Line 7 7 1 Enable TTL Trigger bus line 7 to output pulse after ea
64. SRE Summary Output Buffer Bit s OR SRQ ROUTING handled by your application SRQ program or passed to the controller via GPIB Request Service STATus OPERation EVENt STATus OPERation ENABle Ns 0 lt 1 gt unmask examples 1 lt 2 gt 2 lt 4 gt unmask 3 lt B gt Register decimal Summary bit weight 4 lt 16 gt Bit OR 5 32 PN 6 lt 64 gt Operation Complete 8 OPR 7 lt 128 gt Scan 8 256 ESE 61 unmasks Standard event register bits 0 Complete lt 512 gt 2 3 4 and 5 ESE 1 only unmasks bit 0 10242 SRE 128 unmasks the OPR bit in the status 2048 byte register This is effective only if the 4096 STAT ENAB unmask command is executed 8192 See below x16384 7 STAT OPER ENAB 256 unmasks bit 8 Scan Complete lt 32768 gt which can set the OPR bit in the Status Byte EV EN Figure 4 1 E1476A Multiplexer Module Status System 88 Switchbox Command Reference Chapter 4 STATus OPERation CONDition STATus OPERation CONDition returns the state of the Condition Register in the Operation Status Group The state represents conditions which are part of the instrument s operation The SWITCH driver does not set bit 8 in this register see STATus OPERation EVENt STATus OPERation ENABle Parameters Comments Example ST
65. SS pue 765452 1 Multiplexer Number 2 Logical Address 113 CARD NUMBER 03 SS89 oxa 7652353210 Multiplexer Number 3 Logical Address 114 P Figure 1 19 Card Numbers in a Multiple Module Switchbox Channel Addresses 32 Getting Started Channel addresses channel list have the form ccnn where cc multiplexer card number 01 99 and nn channel numbers 00 63 and 90 94 Channels 90 through 94 are tree relays related to the analog bus and the reference thermistor used for thermocouple measurements You can address single channels ccnn multiple channels sequential channels ccnn ccnn groups of sequential channels ccnn ccnn ccnn ccnn or any combination Multiplexer channels can be addressed using channel numbers or channel ranges For a single module switchbox channel ranges can span across the channels For multiple module switchboxes channel ranges can span across the channels of all modules Use commas to form a channel list or use a colon to form a channel range Only valid channels can be accessed in a channel list or channel range The channel list or channel range must be from a lower channel number to a higher channel number For example CLOS 100 215 is acceptable but CLOS 215 100 generates an error Using the channel range n00 n99 with the SCAN command causes all channels to be scanned except the
66. Thermistor to Bank B for current source 4 wire resistance measurement of the thermistor Chapter 2 Switchbox Applications 41 Exam ple Use CLOSe channel list command to close a channel channel 00 63 Connecting a tree relay channel 90 94 A channel or tree relay remains closed until an OPEN is sent or the module is reset using RST Removing power will Channel to the open all channels and tree relays because the relays are non latching Analog Bus You must close a tree relay to connect a channel to the analog bus For example close channel 23 on module number 1 and connect it to the analog bus by closing the voltage sense bank A tree relay channel 90 See Figure 2 2 CLOS 123 190 Make measurement OPEN 123 190 IChannel 90 can be left closed and other Ibank A channels closed for measurement ET 3 E1476A 64 CHANNEL MULTIPLEXER ANALOG BUS FRONT PANEL VOLTAGE SENSE BUS SONMECIO S H E amp 8 L VM Input e G TO E1411B OR 4 gt E1326B C MULTIMETER 1 a e s a G CURRENT SOURCE BUS J SUE i 100 Br UE StS eS 795 VSA CH90 TERMINAL MODULE VOLTAGE SENSE SANICA BANICA 32 CH00 CH31 32 i 24 ot 1 1 oof e 35 5 SL ILS E o o oo gt GIG gt t R 1 1 HIH LIL GIG
67. UT VM3457 DCV OUTPUT VM3457 MEM FIFO OUTPUT Switchbox RST CLS OUTPUT Switchbox OUTP ON OUTPUT Switchbox TRIG SOUR BUS OUTPUT Switchbox SCAN MODE VOLT OUTPUT Switchbox SCAN PORT ABUS OUTPUT Switchbox SCAN 100 163 OUTPUT Switchbox INIT OUTPUT Switchbox OPC ENTER Switchbox Opc_value ENTER VM3457 Results PRINT Channel 0 Results FOR Chan 1 TO 63 OUTPUT Switchbox TRG ENTER VM3457 Results PRINT Channel Chan Results NEXT Chan OUTPUT Switchbox RST END Assign switchbox logical address Assign voltmeter logical address Reset voltmeter ISet voltmeter for external trigger ISet voltmeter measurement mode Enable voltmeter reading memory mode IReset the multiplexer Enable the switchbox trigger output ISet switchbox to be triggered by the bus ISet switchbox to scan in voltage mode Enable ABUS tree switch control during scan ISet scan list for all 64 channels IStart the scan IPause until switchbox is set up Read response to OPC command Read the first voltmeter reading IPrint first reading ISet up loop for other 63 channels Trigger switchbox to change channels Enter voltmeter measurement result IPrint results back for next channel IReset the switchbox to open all channels Switchbox Applications 53 Example Using the scan complete bit bit 8 can be used in the Operation Status Register Scan Com plete Bit of the SWITCHBOX driver to determine when
68. _ 00 ID Register Base Address IFCO000 46 Logical Address 64 4 E1476 A16 REGISTER MAP 2 080 768 Logical Address 64 10 Register Address Base address Register Offset P Appendix B Figure B 2 Registers Within the Command Module A16 Address Space Register Offset The register offset is the register s location in the block of 64 address bytes For example the multiplexer s Status Control Register has an offset of 04 When you write a command to this register the offset is added to the base address to form the register address For example 04157 4 i 1FDC00 6 0416 1 0 04 6 or 56 320 4 56 324 or 2 087 936 4 2 087 940 Register Based Programming 103 Register Descriptions There are six WRITE and eight READ registers on the multiplexer This section contains a description of the registers followed by a bit map of the registers in sequential address order Undefined register bits appear as 1 when the register is read and have no effect when the register is written to The WRITE can write to the following multiplexer registers Registers Status Control register base 0416 Channels 0 through 15 Relay Control Register base 2016 Channels 16 through 31 Relay Control Register base 2216 Channels 32 through 47 Relay Control Register base 2416 Channels 48 through 63 Relay Control Register base 2
69. ain the Declaration of Conformity e http regulations corporate agilent com DoC search htm You can then search by product number to find the latest Declaration of Conformity Alternately you can go to the product web page www agilent com find E1476A click on the Document Library tab then scroll down until you find the Declaration of Conformity link Notes Chapter 1 Getting Started Using This Chapter This chapter gives guidelines to get started using the E1476A 64 Channel 3 Wire Multiplexer module multiplexer including Multiplexer lt 11 Configuring the Multiplexer Module 15 Configuring the Terminal Module 19 Configuring the E1586A Rack Mount Terminal Panel 26 Programming the 31 Multiplexer Description The E1476A 64 Channel 3 Wire Multiplexer module is a VXIbus C size register based slave device The multiplexer can operate in a C size VXIbus mainframe or a VMEbus mainframe The multiplexer instrument is the firmware running in the Command Module E1406 for example This firmware is the instrument driver providing Standard Commands for Programmable Instruments SCPI programming capability The term switchbox is used to refer to an instrument made up of one or more switch modules Programming the E1476A can be via a comm
70. and module using SCPI commands through an embedded controller using Compiled SCPI C SCPI or Standard Instrument Control Language SICL or via direct register access see Appendix B Reed relays are used for each channel and tree relay Maximum voltage is 120VDC RMS or 170V peak Maximum current is 35 mA non inductive Thermal offset is 4 uV per channel 2 mV using maximum integration time with 10 samples averaged Chapter 1 Getting Started 11 Multiplexer Block Diagram Figure 1 1 shows a simplified block diagram of the E1476A multiplexer with typical connections to external multimeters di IANN MU LEXER VOLTAGE SENSE BUS AAA AWN A CURRENT SOURCE BUS 003 JQ 000 QUO 0000 T o eed S 00 000 000 000 000 000 000 000 c vM 000 000 0 gt BANK EY Y a EXTERNAL VOLTMETER llc 3 bo 0000 ow oo S855 oo aoaoaua 9996 0000000 oo pipes T9 6 LA z 12 Getting Started Figure 1 1 E1476A Simplified Block Diagram Chapter 1 Multiplexer Front Panel The E1476A multiplexer consists of a switch module and a terminal module Use
71. apter 4 For a single module switchbox the channel address channel list has the form nn where nn channel number For a multiple module switchbox the channel address channel list has the form ccnn where cc card number and nn channel number See Chapter 2 for switchbox applications See Figure 1 3 for a typical multiple module switchbox configuration P MULTIPLE MODULE SWITCHBOX Command Module Switch Laddr 112 Switch Laddr 113 Switch Laddr 114 Switch Laddr 115 Switch Laddr 116 Laddr Logical Address bS Pd Card Number 01 02 03 04 05 Valid Numbers 01 99 Channel Addresses 1nn 2nn 3nn 4nn etc where nn is the channel number Ne 2 Figure 1 3 Typical Multiple Module Switchbox A scanning voltmeter configuration uses the voltmeter instrument driver VOLTMTR The scanning voltmeter commands are different from the switchbox commands listed in Chapter 4 A scanning voltmeter uses the commands in the E1326B E1411B 5 Digit Multimeter User s Manual to control the switches and make measurements See Chapter 3 for scanning voltmeter applications See Figure 1 4 for a typical scanning voltmeter configuration b A SCANNING VOLTMETER Command Module Voltmeter Laddr 24 Switch Laddr 25 Switch Laddr 26 Switch Laddr 27 away Card Number 01 02 03 Valid Numbers 01 99 Channel Ad
72. be liable for damage to tangible property per incident up to the greater of 300 000 or the actual amount paid for the product that 1s the subject of the claim and for damages for bodily injury or death to the extent that all such damages are determined by a court of competent jurisdiction to have been directly caused by a defective Agilent product 9 TO THE EXTENT ALLOWED BY LOCAL LAW THE REMEDIES IN THIS WARRANTY STATEMENT ARE CUSTOMER S SOLE AND EXLUSIVE REMEDIES EXCEPT AS INDICATED ABOVE IN NO EVENT WILL AGILENT OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT SPECIAL INCIDENTAL CONSEQUENTIAL INCLUDING LOST PROFIT OR DATA OR OTHER DAMAGE WHETHER BASED IN CONTRACT TORT OR OTHERWISE FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND THE WARRANTY TERMS CONTAINED IN THIS STATEMENT EXCEPT TO THE EXTENT LAWFULLY PERMITTED DO NOT EXCLUDE RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU U S Government Restricted Rights The Software and Documentation have been developed entirely at private expense They are delivered and licensed as commercial computer software as defined in DFARS 252 227 7013 Oct 1988 DFARS 252 211 7015 May 1991 or DFARS 252 227 7014 Jun 1995 as a commercial item as defined in FAR 2 101 a or as Restricted computer software as defined FAR 52 227 19 Jun 1987 or any equivalent agency regulation or contract clause
73. box Command Reference 83 Comments Example Special Case of Using Upper Range 99 in the Channel List Specifying the last channel as 99 such as 100 199 automatically scans all channels on the card number specified by cc but does not close tree relays 90 through 94 Defining Scan List When ROUTe SCAN is executed the channel list is checked for valid card and channel numbers An error is generated for an invalid channel list Scanning Operation When a valid channel list is defined INITiate IMMediate begins the scan and closes the first channel in the channel list Successive triggers from the source specified by TRIGger SOURce advance the scan through the channel list Four Wire Resistance Scanning ROUTe SCAN MODE FRES restricts the valid channel list see ROUTe SCAN MODE command Stopping Scan See the ABORt command Closing the VSA VSB CS RTA and RTB Tree Relays The proper state of channels 90 through 94 is automatically controlled by the firmware during a scan and is based on the settings of ROUTe SCAN PORT and ROUTe SCAN MODE These are invalid channels to explicitly place in a ROUTe SCAN channel list Related Commands ROUTe CLOSe ROUTe OPEN ROUTe SCAN MODE ROUTe SCAN PORT TRIGger TRIGger SOURce RST Condition All channels open Scanning Using External Devices This BASIC language example shows how to scan channels using the E1406 Command Module and an E3457A Digital Multimeter
74. can is enabled from the GPIB interface and the trigger source is not HOLD or BUS you can clear the interface to stop the scan In the BASIC programming language this is done by executing the CLEAR command for your interface CLEAR 7 for example When the scan is enabled from the GPIB interface and the trigger source is TRIGger SOURce BUS or TRIGger SOURce HOLD send the ABORt command over the GPIB bus Note Clearing the GPIB interface during a scan leaves the last channel the scan closed in the closed position and does not set the scan complete status bit Stopping Scans by using the terminal You may use a terminal connected to the E1406 Command Module to stop any scan If the scan was started from the terminal and the trigger source is HOLD or BUS send the ABORt command to halt the scan If the scan was started from the terminal and some other trigger source is being used Ctrl c will send an interface CLEAR to the instrument and abort the scan Sending Ctrl r also sends an interface CLEAR to the instrument and additionally performs a reset RST on the instrument See the E1406 Command Reference for details on the terminal interface If the scan was started from the GPIB interface but you want to stop it by using the terminal first make sure that the correct instrument e g SWITCH at desired logical address is selected by using the terminal soft keys Then send a Ctrl r This will send an interface CLEAR to the GPIB tas
75. ch scanned channel is closed OUTPut TTLTrgn STATe Example Chapter 4 OUTPut TTLTrgn STATe queries the present state of the specified TTL Trigger bus line The command returns 1 if the specified TTL Trg bus line is enabled 0 if disabled Query TTL Trigger Bus Enable State This example enables TTL Trigger bus line 7 and queries the enable state The OUTPut TTLTrgn command returns 1 since the port is enabled OUTP TTLT7Z STAT 1 Enable TTL Trigger bus line 7 OUTP TTLT7 Query bus enable state Switchbox Command Reference 79 ROUTe Subsystem Syntax ROUTe CLOSe Parameters Comments The ROUTe command subsystem controls switching and scanning operations for the Multiplexer Modules in a switchbox ROUTe CLOSe channel list CLOSe channel list OPEN channel list OPEN channel list SCAN channel list MODE mode MODE port ROUTe CLOSe channel list closes multiplexer channels specified in the channel list The channel list is in the form ccnn ccnn or ccnn ccnn where cc card number 00 99 and nn channel number 00 63 and 90 94 Name Type Range of Values Default Value channel list numeric 00 cc31 90 cc94 N A Closing Channels To close a single channel use ROUT CLOS ccnn multiple channels use ROUT CLOS sequential channels use ROUT
76. command Chapter 2 Switching Applications This section provides some example applications to make measurements using the switching method including Switching Channels to the Analog Bus Example Connecting a Channel to the Analog Bus Example 2 Wire Resistance Measurements Example 4 Wire Resistance Measurements Example Temperature Measurements Switching Channels rorthe switching method when OPEN and CLOSe are use to individually to the Analog Bus switch channels the appropriate tree relay VSA VSB or CS must also be closed to connect channels to the analog bus to make measurements from the analog bus Once closed a tree relay remains closed until specifically opened OPEN command remove power from the module or reset the module with a RST command Table 2 2 provides a description of each tree relay function Table 2 2 Tree Relay Descriptions Tree Relay Channel Designation Functional Description 90 VSA Connects the Voltage Sense H L G terminals of the Analog Bus to the Bank A channels channels 00 to 31 91 VSB Connects the Voltage Sense H L G terminals of the Analog Bus to the Bank B channels channels 32 to 63 92 CS Connects the Current Source H L G terminals of the Analog Bus to the Bank B channels channels 32 to 63 93 RTA Connects the Reference Thermistor to Bank A for voltage sense 4 wire resistance measurement of the thermistor 94 RTB Connects the Reference
77. crete TRG or GET command ECLTrgn numeric ECL Trigger bus line 0 or 1 EXTernal discrete Trig In port HOLD discrete Hold Triggering IMMediate discrete Immediate Triggering TTLTrgn numeric TTL Trigger bus line 0 7 Comments Enabling the Trigger Source The TRIGger SOURce command only selects the trigger source The INITiate IMMediate command enables the trigger source The trigger source must be selected using the TRIGger SOURce command before executing the INIT command One Trigger Input Selected at a Time Only one input ECLTrgO or 1 TTLTrgO 1 2 3 4 5 6 or 7 or EXTernal can be selected at one time Enabling a different trigger source will automatically disable the active input For example if TTLTrg1 is the active input and TTLTrg4 is enabled TTLTrg1 will become disabled and TTLTrg4 will become the active input Using the TRIGger Command You can use TRIGger IMMediate to advance the scan when TRIGger SOURce BUS or TRIGger SOURce HOLD is selected Using External Trigger Inputs With TRIGger SOURce EXTernal selected only one switchbox at a time can use the external trigger input at the E1406 Trig In port Using TTL or ECL Trigger Bus Inputs These triggers are from the VXI backplane trigger lines ECL 0 1 and TTL 0 7 These may be used to trigger the SWITCH driver from other VXI instruments Using EXTernal TTLTrgn and ECLTrgn Trigger Inputs After using TRIGger SOURce EXT TTLTn ECLTn the selecte
78. current source lines of the analog bus This is required for four wire measurements Related Commands ROUTe OPEN ROUTe CLOSe RST Condition All multiplexer channels are open Example Closing Multiplexer Channels This example closes channel 00 of a card number 1 Multiplexer module and channel 15 of a card number 2 Multiplexer module in a single switchbox configuration CLOS 100 215 Close channels 100 and 215 100 closes channel 00 of multiplexer 1 215 closes channel 15 of multiplexer 2 ROUTe CLOSe ROUTe CLOSe lt channel_list gt returns the current state of the channel s queried The lt channel_list gt is in the form ccnn The command returns 1 if the channel is closed or returns 0 if the channel is open If a list of channels is queried a comma delineated list of O or 1 values is returned in the same order of the channel list Comments Query is Software Readback The ROUTe CLOSe command returns the current state of the hardware controlling the specified channel It does not account for a failed switch element or a relay closed by direct register access see Appendix B Chapter 4 Switchbox Command Reference 81 Example ROUTe OPEN Parameters Comments Query Multiplexer Channel Closure CLOS 100 215 Close channels 100 and 215 CLOS 215 Query channel 215 ROUTe OPEN channel list opens the multiplexer channels specified in the channel list The channel list i
79. d Thr ohms the resistance of the 5 thermistor W In Thr ohms A 1 28463E 3 B 0 23625E 3 and C 9 2697E 8 Tref 4 1 A W B C W W 273 15 Measure voltage on the thermocouple connected to a channel Vt Compute the effective temperature at the external thermocouple junction by doing the following two steps Compute the actual voltage across the external thermocouple junction using Vtctexternal Vmeter gt VtCTref wWhereV meter is the actual voltmeter reading and Vtcr er is the voltage across the selected thermocouple type at the terminal module temperature Tref This voltage must be evaluated from tabular data for the selected thermocouple Evaluate the actual thermocouple temperature using the VtCrexternal Value and the tabular data for the selected thermocouple Compute the compensated voltage V by the formula V Vt Vref Convert the compensated voltage V calculated in Step 4 to temperature This is the actual temperature measured by the thermocouple Switchbox Applications 47 Scanning Applications This section provides some example applications to make measurements using the scanning method including Scanning Channels Using the Analog Bus Scanning Channels Using the Analog Bus Example Scanning Using TTL VXIbus Triggers Example Scanning Using BUS Trigger Example Using the Scan Complete Bit commands in the scan sequence Scanning a multiplexer channel c
80. d trigger source remains assigned to the SWITCH driver until it is relinquished through use of the TRIG SOUR BUS HOLD command While the trigger is in use by the SWITCH driver no other drivers operating on the E1406 command module will have access to that particular trigger source Likewise other drivers may consume trigger resources which may deny access to a particular trigger by the SWITCH driver You should always release custody of trigger sources after completion of an activity by setting the trigger source to BUS or HOLD TRIG SOUR BUS HOLD 94 Switchbox Command Reference Chapter 4 Using Bus Triggers To trigger the switchbox with TRIGger SOURce BUS selected use the IEEE 488 2 common command TRG or the GPIB Group Execute Trigger GET command Trig Out Port Shared by Switchboxes See the OUTPut command Related Commands ABORt ROUTe SCAN OUTPut RST Condition TRIGger SOURce IMMediate Example Scanning Using External Triggers In this example the trigger input is applied to the E1406 Command Module Trig In port TRIG SOUR EXT Set trigger source to external SCAN 100 163 Set channel list INIT Start scanning cycle trigger externally Advance channel list to next channel Example Scanning Using Bus Triggers TRIG SOUR BUS Set trigger source to bus SCAN 100 163 Set channel list INIT Start scanning cycle TRG Advance channel list to next channel TRIGger SOURce TRIGger SOURce returns the current trigger s
81. dresses 1nn 2nn 3nn Ne etc where nn is the channel number 27 Figure 1 4 Typical Scanning Voltmeter Chapter 1 Configuring the Multiplexer Warnings and Cautions N CAUTION Chapter 1 PAS CAUTION This section gives guidelines to configure the switch module See Configuring the Terminal Modules for guidelines to configure the terminal modules and to connect the E1586A Rack Mount Terminal Panel This section includes Warnings and Cautions Setting the Logical Address Switch Setting the Interrupt Priority Installing the Multiplexer in a Mainframe Connecting the Analog Bus SHOCK HAZARD Only qualified service trained personnel who are aware of the hazards involved should install configure or remove the multiplexer module Disconnect all power sources from the mainframe the terminal modules and installed modules before installing or removing a module When handling user wiring connected to a terminal module consider the highest voltage present accessible on any terminal Use only wire with an insulation rating greater than the highest voltage which will be present on the terminal module Do not touch any circuit element connected to the terminal module if any other connector to the terminal module is energized to more than 30 VAC rms or 60 VDC MAXIMUM VOLTAGE CURRENT Maximum allowable voltage per channel terminal to terminal or terminal to chassis for the multiplexer is 120
82. e channels 00 through 63 open or closed Control Relay States channels 90 through 94 open or closed ARM COUNt TRIGger SOURce OUTPut STATe INITiate CONTinuous e ROUTe SCAN MODE ROUTe SCAN PORT Recalling States rhe RCL numeric state command recalls a previously saved state Enter the number 0 9 in the numeric state parameter of the desired saved state If SAV was not previously executed using the selected number the multiplexer will configure to the reset values see Table 2 1 NOTE Scan lists are not saved when a state is saved You must re enter the scan list after recalling a state Chapter 2 Switchbox Applications 55 Detecting Error Conditions Using Polling 10 DIM Err 256 There are two general approaches to error checking polling and using interrupts The simplest but most time consuming is to ask the instrument whether there are errors at every step of the switching process This is called polling and is illustrated in the following example IClose channel 1 20 OUTPUT 70914 CLOS 101 Query for error 30 OUTPUT 70914 SYST ERR Read response 40 ENTER 70914 Err 50 IF VAL Err 0 THEN 60 PRINT Error Err 70 STOP 80 END IF Uf an error is found Err not 0 IPrint the error IQuit if error encountered 90 PROGRAM CONTINUES Using Interrupts The second approach to error checking involves the use of interrupts The following program is a method o
83. e E1326 E1411 multimeter When using an E1326 E1411 the excitation is available on the Terminal Panel terminals labeled HI I and LO I The E1326 E1411 generates this excitation using the 2 wire or 4 wire Ohms measurement functions Getting Started 29 CAUTION DO NOT EXCEED COMPLIANCE VOLTAGE If using a single E1326 E1411 multimeter to supply the excitation for multiple E1586A Terminal Panels the resultant voltage sum of the voltages developed across the thermistors could exceed the compliance voltage of the multimeter This is especially true if attempting to excite all three thermistors on the Terminal Panels Connecting One 1 this configuration a single Terminal Panel is used to provide up to 32 Terminal Panel for channels for temperature measurements This provides the excitation Reference Temperature current to all three on board thermistors on the Terminal Panel Figure 1 17 Measurements Shows connections for a single Terminal Panel Connects All Thermistors S Eos HI LO 2 leeeoeo S One E1586 Terminal Panel a using All Thermistors E Figure 1 17 Connecting Three Thermistors on a Single Panel Connecting Two n this configuration two Terminal Panels are used to provide up to 64 Terminal Panels for channels for temperature measurements This provides the excitation Reference Temperature current to all six on board thermistors on the Terminal Panel
84. e Resistance Measurements Switchbox Applications 45 Example The E1476A allows you to make temperature measurements from any Temperature channel of the multiplexer A 5 KO reference thermistor is provided on the E1476A terminal module You measure the resistance of this reference Measurements thermistor to calculate the temperature of the thermocouple junctions within the terminal module to compensate thermocouple temperature measurements Temperature measurements using thermistors consist of 2 wire or 4 wire ohms measurements Thermocouple measurements are compensated by the thermistor on the E1476A terminal module The temperature of the thermocouple lead junctions inside the terminal module affects the temperature reading taken from a thermocouple Use the thermistor on the terminal module to determine the temperature inside the terminal module and to compensate the thermocouple temperature measurements This example shows one way to make temperature measurements using an E1412A or equivalent multimeter See Figure 2 5 for typical connections See Chapter 3 to make temperature measurements with the E1326 or E1411 multimeters E1476A 64 CHANNEL MULTIPLEXER ANALOG BUS FRONT PANEL CONNECTOR VOLTAGE SENSE BUS CY TET 11 TO E14118 OR E1326B MULTIMETER CURRENT SOURCE BUS 1000222 WW SA CH90 TERMINAL MODULE VOLTAGE SENSE BANK A 1 BANK A CHOO CH31 1 THERMOCOUPLE oe HH g
85. ect bank B channels 32 through 63 to channel 00 through the bank A bus You can now make two wire measurements from 63 channels using channel 00 as the common No current limiting resistors are in the path See Figure 2 3 for a circuit diagram A typical program sequence is CLOS 190 191 100 Closes all paths through channel 00 CLOS Q cc cc channel to be measured 01 to 63 Make measurement 1 Open channel cc after measurement is made Example Four Wire To make four wire resistance measurements when switching not Resistance scanning you must use a channel from bank A for the voltage sense and close the voltage sense bank A tree relay VSA Also you must use a Measurements channel from bank B for the current source and you must close the current source relay CS on bank B The VSA and CS relays connect the device under test to the analog bus Typically you pair the first channel of bank A with the first channel of bank B e g channels 00 and 32 01 and 33 02 and 34 etc See Figure 2 4 for a circuit diagram A typical program sequence follows NOTE Using the SCAN command automatically pairs channels 00 and 32 01 and 33 02 and 34 etc for four wire measurements See Scanning Applications CLOS 100 190 132 192 Channels 100 and 132 are a 4 wire pair Make measurement in four wire mode OPEN 100 132 Open measurement channels except tree Chapter 2 Switchbox Applications 43
86. ed Use OPEN channel list to open the channels specified Use SCAN channel list to close and open the set of channels specified one channel at a time Card Numbers The multiplexer card number depends on the switchbox configuration single module or multiple module set for the multiplexers Leading zeroes can be ignored for the card number See Setting the Logical Address Switch in this chapter for more information on setting logical addresses and switchbox configurations For a single module switchbox the card number is always 01 For a multiple module switchbox the card numbers are 01 02 nn The module with the lowest logical address is card number 01 the module with the next lowest logical address is card number 02 etc For example assume three multiplexers are configured to form a multiple module switchbox instrument with logical addresses of 112 113 and 114 as shown in Figure 1 19 Since card number 01 is assigned to the module with the lowest logical address card number 01 is assigned to the card at logical address 112 Card number 02 is assigned to the card at address 113 and card number 03 is assigned to the card at address 114 Chapter 1 Getting Started 31 a Ss Command Module CARD NUMBER 01 7865435210 Multiplexer Number 1 d ba i Logical Address 112 Secondary Address 14 CARD NUMBER 02
87. egisters and print their value chan 0 15 reg iwpeek unsigned short base addr 0x20 chan 16 31 reg iwpeek unsigned short base addr 0x22 chan 32 47 reg iwpeek unsigned short base addr 0x24 k u chan 48 63 reg iwpee unsigned short base addr 0x26 chan tree reg iwpeek nsigned short base addr 0x28 printf Channels 00 15 register 0 4 chan 0 15 reg printf Channels 16 31 register 0 4 chan 16 31 reg printf Channels 32 47 register 0x 4X n chan 32 47 reg printf Channels 48 63 register 0x 4X n chan 48 63 reg printf Channels 90 94 tree register 0x 4X n chan tree reg delay 2000 waits 2 seconds before resetting mux reset the E1476A to open all closed channels writing a 0 to the channels registers will also open channels reset mux base addr Scan Channels RRR KK RK KKK KKK ko kk ke ke e ke kx Scanning channels KOK KKK KK ko ko ke ke ke ke x ke e e x connect Bank A and Bank B to the analog bus by closing the VSA and VSB tree relays bits 0 and 1 iwpoke unsigned short base addr 0x28 3 scan channels 0 15 in bank A register offset 0x20 for k 0 k lt 15 iwpoke unsigned short base addr 0x20 ldexp 1 k take measurement here after each iteration of the loop set all bits to 0 to open last closed channel iwpoke unsigned s
88. elay should be replaced Contact Resistance Variance The stability of the contact resistance decreases with age Using this method the contact resistance is measured several 5 10 times and the variance of the measurements is determined An increase in the variance indicates deteriorating performance Number of Relay Operations Relays can be replaced after a predetermined number of contact closures However this method requires knowledge of the applied load and life specifications for the applied load 118 Relay Life Appendix D Index E1476A 64 Channel 3 Wire Multiplexer Module User s Manual A A16 address space inside command module 103 outside command module 102 abbreviated commands 66 ABORt 68 address base 102 addressing the multiplexer 31 addressing register 101 ARM subsystem ARM COUNt 70 ARM COUNt 70 B base address 102 C channels closing 108 command separator 66 commands ABORt 68 ARM COUNt 70 ARM COUNt 70 DISPLay MONitor CARD 72 DISPLay MONitor STATe 73 DISPLay MONitor STATe 74 INITiate CONTinuous 75 INITiate CONTinuous 76 INITiate MMediate 76 OUTPut ECLTrgn STATe 77 OUTPut ECL Trgn STATe 77 OUTPut TTLTrgn STATe 79 OUTPut TTLTrgn STATe 79 OUTPut EXTernal STATe 78 OUTPut EXTernal STATe 78 ROUTe CLOSe 80 ROUTe CLOSe 81 ROUTe JOPEN 82 ROUTe JOPEN 83 ROUTe SCAN 83 ROUTe SCAN MODE 85 ROUTe SCAN MODE 86 ROUTe S
89. en close state of every switch on the module This display is dynamically updated each time a switch is opened or closed Parameters Name Type Range of Values Default Value lt mode gt boolean ON OFF 1 0 OFF 0 Comments Monitoring Switchbox Channels DISPlay MONitor STATe ON or DISPlay MONitor STATe 1 turns the monitor mode ON to show the channel state of the selected module DISPlay MONitor STATe OFF or DISPlay MONitor STATe 0 turns the channel monitor OFF Typing in another command on the terminal will cause the DISPlay MONitor STATe to automatically be set to OFF 0 Note Use ofthe OFF parameter is useful only if the command is issued across the GPIB interface Selecting the Module to be Monitored Use DISPlay MONitor CARD number AUTO to select the module Chapter 4 Switchbox Command Reference 73 Monitor Mode on an E1406 Command Module Display A typical display for the E1476A 64 Channel Multiplexer with all channels all relays closed follows The H indicates data is in hexadecimal format Each channel is represented as a bit in the hex value The channels are grouped into four blocks of 16 channels each The tree relays channels 90 94 are in the fifth group For example closing only channel 3 would appear as 15 0 0008 15 0 HFFFF 31 16 HFFFF 47 32 HFFFF 63 48 HFFFF 94 90 H1F RST Condition DISPlay MONitor STATe OFF O A RST also opens all switches on the card
90. er base 0446 Multimeter Multimeter Status Register base 0416 Multimeter Multimeter Command Register base 0816 Register Based Programming 109 Multiplexer Status Register bit 7 BUSY bit is monitored to determine when a channel can be closed or opened and when a channel has finished closing or opening Multimeter status bit O ready for command is monitored to determine when a trigger opcode can be written to the Command Register flowchart assumes the multimeter is already configured Multimeter status bit 5 multimeter complete is monitored to determine when the analog to digital A D conversion is in progress and thus when to advance the channel This enables each channel to be measured before the readings are read from the buffer The channel can also be advanced by monitoring bit 4 Data Ready However before measuring the next channel readings from the previous channel must be read from the buffer in order to clear the bit Multimeter Autozero is often turned on in order to detect when bit 5 is active Programming Example System Configuration NOTE Example Program The example program in this section demonstrates one way to register program the multiplexer including Reading the ID Device Type and Status Registers Closing Opening a channel Stand Alone Multiplexer Measurements Scanning through channels The following C language example programs use Borland s Turbo C programmi
91. f checking for errors using interrupts as you program the multiplexer The program monitors the multiplexer s Standard Event Status Register for an error condition If no errors occur the multiplexer functions as programmed If errors do occur the multiplexer interrupts the computer and the error codes and messages are read from the error queue 10 Add your application s code here 100 ON INTR 7 CALL Errmsg to print out error message 110 ENABLE INTR7 2 210 OUTPUT 70914 SRE 220 OUTPUT 70914 ESE your application s code here 32 Enable the standard event summary bit SRE 60 Enable all parser generated errors 230 Add your application s code here 300 END 310 Define interrupt service routine 320 SUB Errmsg 330 DIM A 256 340 CLEAR 70914 Declare response string IClear the multiplexer 350 SPOLL 70914 IFetch status byte 360 REPEAT Repeat 370 OUTPUT 70914 SYST ERR Query for error 380 ENTER 70914 Code A Read response 390 PRINT Code A 400 UNTIL Code 0 IPrint error Query for an error until error code 0 410 OUTPUT 70914 CLS Clear status registers and error queue 420 STOP 430 SUBEND 56 Switchbox Applications Chapter 2 Chapter 3 Scanning Voltmeter Applications Using This Chapter NOTE This chapter provides application information and examples to use the E1476A 64 Channel 3 Wire Multiplexer module multiplexer in a scanning voltmeter configuration including
92. g All measurements can be made by scanning a list of channels The advantage of scanning is that the appropriate tree relays are closed automatically when you scan a channel list with the SCAN command and set SCAN PORT ABUS See Switching Applications for examples of measurements using switching methods See Scanning Applications for examples of measurements using scanning methods At power on or following the reset of the multiplexer RST command all 64 channels and the tree relays are open In addition after a RST command the current scan channel list is invalidated Table 2 1 lists the parameters and default values for the functions following turn on or reset Table 2 1 E1476A Default Conditions for Power on and Reset Parameter Default Description ARM COUNt 1 Number of scanning cycles is one TRIGger SOURce IMM Advances through a scanning list automatically INITiate CONTinuous OFF Number of scanning cycles is set by ARM COUNt OUTPut STATe OFF Trigger output from EXT TTL or ECL sources is disabled ROUTe SCAN MODE NONE Channel list is set for volts measurement ROUTe SCAN PORT NONE Analog bus connections are disabled from channels Channel state All 64 channels are open channels 00 63 Tree relay state All tree relays are open channels 90 94 Channel list from SCAN Current channel list is invalidated following a command after RST reset of the module with RST
93. h92 Connects the Current Source H L G terminals of the Analog Bus to Bank B bit 3 RTA ch93 Connects the Reference Thermistor to Bank A for voltage sense bit4 RTB ch94 Connects the Reference Thermistor to Bank B for current source 106 Register Based Programming Appendix B Resetting the Multiplexer There are two ways to reset the multiplexer 1 You can write a 0 to all bits in the Relay Control Registers 2 You can use bit 0 R in the Status Control Register The R bit in the Status Control Register must be set to 1 to reset the E1476A module and subsequently set to 0 to restore normal operation NOTE You must wait at least 100 msec after writing a 1 to the R bit of the Status Control Register before you write a 0 to that bit to restore normal operation Reading the Relay Reading the Relay Control Registers returns a hexadecimal number that Control Registers indicates a 1 for each bit representing a channel that is closed bit that is 0 indicates the channel is open Appendix B Register Based Programming 107 Program Timing and Execution Closing Channels This section contains generalized flowcharts and comments for performing program timing and execution and other procedures The flowcharts identify the registers used and the status bits monitored to ensure execution of the program This flowchart shows how to close or open a multiplexer channel and determine
94. he E1406 Command Module the address switch value must be a multiple of 8 if the module is the first module in a switchbox used with a VXlbus command module using SCPI commands When in the scanning voltmeter configuration the address switch value must be sequential to the voltmeter address e v Logical Address Switch Location Logical Address 112 a Decimal Value TQ 00 v 00 s NL 1 CLOSED LOO BoA 63 0 RUFI CUL 64 32 16 112 Switch Set To 0 OFF CLOSED Switch Set To 1 ON ES 7 Figure 1 5 Setting the Logical Address Switch Chapter 1 Setting the Interrupt Chapter 1 Priority NOTE For most applications the interrupt priority level should not need to be changed Interrupts are enabled at power up after a SYSRESET or after resetting the module via the Control Register An interrupt is generated after any relay Control Register is accessed when interrupts are enabled The interrupt is generated approximately 1 3ms after one of the registers is accessed The Interrupt Request Level switch selects the priority level to be asserted The Interrupt Request Level switch is set in position 1 when shipped from the factory The interrupts are disabled when set to level 0 Be careful when deciding to disable the interrupts as both the VOLTMTR and SWITCH drivers require that interrupts be enabled
95. hort base addr 0x20 0 scan channels 16 31 in bank A register offset 0x22 for k20 k lt 15 k iwpoke unsigned short base addr 0x22 ldexp 1 k take measurement here after each iteration of the loop 112 Register Based Programming Appendix B set iwpoke scan for k iwpoke tak set iwpoke scan for k iwpoke tak set iwpoke all bits to 0 to open last closed channel unsigned short base addr 0x22 0 channels 32 47 in bank A register offset 0x24 0 k lt 15 k unsigned short base addr 0x24 ldexp 1 k measurement here after each iteration of the loop all bits to 0 to open last closed channel unsigned short base addr 0x24 0 channels 48 63 in bank A register offset 0x26 O k lt 15 unsigned short base addr 0x26 ldexp 1l k measurement here after each iteration of the loop all bits to 0 to open last closed channel unsigned short base addr 0x26 0 close SICL session iclose e1476a end of main Reset Function RRR KR RK KKK KKK KK KK IK RK RK KR RK KKK RK KK e e KK void reset mux char base addr reset the mux to open all relays write a 1 to status bit 0 delay 100 ms for reset then set bit to 0 to allow closing switches this function resets the multiplexer
96. ife approaches The sensitivity of the application should be weighed against the cost of replacing relays with some useful life remaining Relays that wear out normally or fail due to misuse should not be considered defective and are not covered by the product s warranty Some effects of loading and switching frequency on relay life follow Relay Load In general higher power switching reduces relay life In addition capacitive inductive loads and high inrush currents for example turning on a lamp or starting a motor reduces relay life Exceeding specified maximum inputs can cause catastrophic failure Switching Frequency Relay contacts heat up when switched As the switching frequency increases the contacts have less time to dissipate heat The resulting increase in contact temperature also reduces relay life End of Life Determination Appendix D A preventive maintenance routine can prevent problems caused by unexpected relay failure The end of life of a relay can be determined by using one or more of three methods contact resistance maximum value contact resistance variance and or number of relay operations The best method or combination of methods as well as the failure criteria depends on the application in which the relay is used Relay Life 117 Contact Resistance Maximum Value As the relay begins to wear out its contact resistance increases When the resistance exceeds a predetermined value the r
97. igure 1 16 shows channel numbering for the E1586A Rack Mount Terminal Panel g gt Channels 4 7 or 36 39 Terminal Block Channels Thermistor Channels Channels Thermistor Channels 0 3 or 32 35 Terminal 8 11 or 40 43 16 19 or 48 51 Terminal 24 27 or 56 59 Terminal Block Block Terminal Block Terminal Block Block Terminal Block ES eee Channels 20 23 or 52 55 Terminal Block Channels 12 15 0r 44 47 Terminal Block Channels 28 31 or 60 63 Terminal Block or I Sou Analog Bu m RTA V Sense Connections rce Figure Analog Bus Connections Reference Thermistor Connections and Operations Chapter 1 1 16 E1586A Rack Mount Terminal Panel Connections The Terminal Panel also provides Analog Bus connections to the multiplexer module However since the terminal module is used with other modules the Analog Bus connections are labeled differently on the Terminal Panel Figure 1 16 shows the Analog Bus connections to the Terminal Panel The E1586 Terminal Panel s three thermistors are located next to the channel 3 terminal block between channels 11 and 16 and next to channel 24 see Figure 1 16 The thermistor excitation source is usually supplied by an externally connected multimeter or voltmeter such as th
98. ister base 04 6 enables you to Register disable enable the interrupt generated when channels are closed base 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Write Undefined D Undefined R Read Unde M Undefined B D Undefined fined Status Control Register Bits Defined WRITE BITS Status Control Register bit 0 R Writing a 1 to this bit resets the switch to the power on state all channels open You must set bit 0 back to a logical 0 before resuming normal operations of the module such as closing and opening switches bit 6 D Disable interrupt by writing a 1 to this bit this is set back to O with a reset READ BITS Status Control Register bit 6 D Interrupt Status 1 disabled 0 enabled bit 7 Busy Status 1 not busy 0 busy bit 14 M MODID bit if the bit is 0 module has been selected Reading the Status Control Register Module Status Relay Control Registers Appendix B To disable the interrupt generated when channels are opened or closed write a 1 to bit 6 of the Status Control Register base 0416 Typically interrupts are only disabled to peek poke a module Refer to your command module s operating manual before disabling the interrupt Interrupts must be enabled to operate the SWITCH and VOLTMTR instrument drivers Each relay requires about 1m
99. k but will not place the instrument in the reset state with respect to the GPIB task These actions will occur regardless of the trigger source setting 68 Switchbox Command Reference Chapter 4 Note Clearing the interface using a Ctrl c from the terminal during a scan leaves the last channel it closed in the closed position and does not set the scan complete status bit Related Commands ARM INITiate CONTinuous ROUTe SCAN TRIGger Example Stopping a Scan with ABORt TRIG SOUR BUS Bus is trigger source INIT CONT ON Set continuous scanning SCAN 100 115 Set channel list INIT Start scanning cycle ABOR Abort scan in progress Chapter 4 Switchbox Command Reference 69 ARM Subsystem Syntax ARM COUNt Parameters Comments Example ARM COUNt The ARM subsystem allows a scan list to be scanned multiple times 1 through 32 767 with one INITiate command ARM COUNt number MIN MAX COUNE lt MIN MAX gt ARM COUNt number MIN MAX allows scanning cycles to occur a multiple of times 1 to 32 767 with one INITiate command when INITiate CONTinuous OFFJO is set MIN sets 1 cycle MAX sets 32 767 cycles Name Type Range of Values Default Value number numeric 1 32 767 MIN MAX 1 Number of Scans Use only values between 1 MIN to 32767 MAX for the number of scanning cycles Related Commands ABORt INITiate IMMediate INITiate CONTinuous RST Condition AR
100. l functions using the default value TRIG IMMediate To know that an error was reported and your instrument is doing what you intended it to do you must read the error register with a SYSTem ERRor command You can insert this program segment at different places in your program to see where the error is generated when debugging your program if it cannot be determined from the error message or by examining the program lines In this case the error is returned as 113 Undefined header which means the command header was incorrectly specified This error is generated by the instrument driver while trying to parse the command the error 113 is documented in the command module manual Chapter 1 Scanning Voltmeter Chapter 1 Exercise 5 Make Measurements This exercise allows you to close multiplexer channels and make voltage measurements using a scanning voltmeter configuration To do this exercise you will need the following items See Figure 1 20 for equipment configuration E1411B multimeter E1476A multiplexer 2 5 inch Analog Bus cable E1400 61605 Zero Ohm jumpers such as paper clips Resistors any value Command E1411B UN Module Analog Bus Cable E1400 61605 SE X Be Ge e MENS V EN i DA A A Tlos AO 2 Y Y Tl TO o t 1411 1476 Multimeter Multiplexer
101. l multiple module switchbox A switchbox configuration does not include a multimeter such as the E1411B installed in the mainframe and measurements must be made using an external multimeter In contrast a scanning voltmeter configuration does include a multimeter installed in the mainframe See Chapter 3 for scanning voltmeter applications ES Er E CARD NUMBER 01 v Q 0 0 x 227 71 Multiplexer Number 1 E ud n n Logical Address 112 Secondary Address 14 Li CARD NUMBER 02 IBN 76543210 Multiplexer Number 2 Logical Address 113 55 CARD NUMBER 03 EET T D 76543210 Multiplexer Number 3 Logical Address 114 P Figure 2 1 Typical Switchbox Configuration Switchbox Applications 39 Switchbox Measurements NOTE Multiplexer Reset Conditions 40 Switchbox Applications The multiplexer can be configured in switchbox configuration to perform voltage 2 wire ohms 4 wire ohms or temperature measurements via the internal analog bus Measurements can be made using switching or scanning methods Switching All measurements can be made by individually switching the channels with CLOSe and OPEN commands Individually switching the channels requires that you also close appropriate tree relay s to connect channels to the analog bus Scannin
102. lexer s configured as a scanning voltmeter you will need the VOLTMTR device driver version A 06 00 or later For all non scanning voltmeter applications you will need the SWITCH driver version A 08 00 or later To load a new SWITCH or VOLTMTR device driver use the VXI Installation Consultant VIC on the Agilent Technologies Universal Instrument Drivers CD Chapter 1 NOTE Exercise 2 Query Module Identity NOTE Exercise 3 Perform Open Chapter 1 Close and Scan Operations For the latest information on instrument drivers see http www agilent com find inst_drivers Turn mainframe power OFF If you want to set a logical address other than the factory set address of 112 see Setting the Logical Address Switch to set a different logical address for the multiplexer Install the multiplexer module in the mainframe See Installing the Multiplexer in a Mainframe for steps to install the multiplexer If you have already connected user inputs to the terminal module you may want to disconnect the terminal module from the switch module for this exercise See Attaching a Terminal Module to the Multiplexer to disconnect the terminal module Turn mainframe power ON and enter the following BASIC program into your computer For this program the GPIB Select Code 7 primary address 09 and logical address 112 The logical address divided by 8 the secondary address 112 8 14 Thus the instrument
103. lt TRIG IMM Serial poll bit 7 of the status byte until it is high 90 END WHILE ENTER 70914 A END Exercise 4 Check for System Errors 36 Getting Started OUTPUT 70914 STAT OPER PRINT STAT OPER EVENT BIT 8 A Query the status operation event register Bit 8 reported high status byte bit 7 was high Print response to the STAT OPER query RUN the program You should hear channel relays opening and closing especially when a large channel list is scanned You can add the following lines to the program in Exercise 3 to verify that no system errors were generated It is always a good idea to check if your program causes the instrument to report any errors during program development such as command strings that are invalid and cause an error to be sent to the instrument s error queue You can read the instrument s error queue by inserting the following four program lines all errors are read until the error queue is 0 No errors 121 REPEAT 122 OUTPUT 70914 SYST ERR 123 ENTER 70914 A A 1 gets the error number A gets the lerror message 124 PRINT A A 125 UNTIL A 0 See Using Interrupts With Error Checking in Chapter 2 for detecting errors with interrupts For example inserting the following incorrect program line 51 OUTPUT 70914 TRIG SOURC BUS will cause an error to be sent to the error queue because TRIG SOURC BUS is an incorrect command header must be TRIG SOUR BUS The instrument stil
104. ltiplexer and makes a voltage measurement on each channel The measured readings are entered into the computer and displayed after the scan You can then check the measured readings with the values of the resistor s you installed on the channels 10 DIM Rdgs 1 32 Dimension array to store readings 20 CLEAR 70903 Clear the scanning voltmeter 30 OUTPUT 70903 RST Reset the scanning voltmeter 40 OUTPUT 70903 MEAS VOLT DC 100 131 Configure the multimeter for DC voltage measurements and specify channel list to scan channels 00 through 31 50 ENTER 70903 Rdgs Enter measured readings 60 PRINT Rdgs Display measured readings 70 END 38 Getting Started Chapter 1 Chapter 2 Switchbox Applications Using This Chapter This chapter gives application information to use the E1476A multiplexer in the switchbox configuration including Switchbox 39 Switching Applications 41 Scanning Applications 48 Recalling and Saving 55 Detecting Error 56 Switchbox Definition Chapter 2 NOTE A switchbox can be a single multiplexer module or multiple multiplexer modules It can also include other switch modules that are controlled by the same switchbox device driver See Figure 2 1 for a typica
105. m Timing and Us eT 108 SSIS PIAS css P 108 Using a Multimeter with the Multiplexer eere nnne 109 axi cris ce E 110 me c Te er 110 Exaile POI 110 Appendix C E1476A Error Messages s eeueeseesseeseeseeeeene nnne nnne nnne nnn 115 115 Appendix D Relay 16 117 pisce AE S 117 Relay Life RR My End of Life CPS es FIND Pv v RP 117 AGILENT TECHNOLOGIES WARRANTY STATEMENT AGILENT PRODUCT E1476A 64 Channel 3 Wire Multiplexer Module DURATION OF WARRANTY 3 years 1 Agilent Technologies warrants Agilent hardware accessories and supplies against defects in materials and workmanship for the period specified above If Agilent receives notice of such defects during the warranty period Agilent will at its option either repair or replace products which prove to be defective Replacement products may be either new or like new 2 Agilent warrants that Agilent software will not fail to execute its programming instructions for the period specified above due to defects in material and workmanship when properly installed and used If Agilent receives notice of such defects during the warranty pe
106. measurement E1412A TTL Ext Trig is used by the multiplexer to signal the multimeter to initiate a measurement E1412A TTL VM Complete used the multimeter to signal the multiplexer that measurement is complete and the multiplexer should change channels The E1412A multimeter GPIB select code 7 primary address 09 and secondary address 03 addressed at 70903 The E1476A GPIB select code 7 primary address 09 and secondary address 14 addressed at 70914 Figure 2 7 shows connections for this example A BASIC language example program follows Figure 2 7 N Command Module E1412A E1406A E1412A E1476A Command Module Multimeter Module Multiplexer Module w ag E1476A A Gay Terminal Module Em m PS Trig S E Tri S In VM Complete d hd Trig o Out 1 ded UT i E1476A A Multiplexer Modules Figure 2 7 Example Scanning Using TTL VXIbus Triggers 50 Switchbox Applications Chapter 2 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 Chapter 2 ASSIGN Switchbox TO 70914 ASSIGN Voltmeter TO 70903 DIM Results 1 64 INTEGER Opc value OUTPUT Voltmeter RST CLS OUTPUT QGVoltmeter CONF RES
107. ments Example STATus PRESet STATus OPERation EVENt returns the bits in the Event Register Operation Status Group that are set The Event Register indicates when there has been a time related instrument event Setting Bit 8 of the Operation Status Register Bit 8 scan complete is set to 1 after a scanning cycle completes Bit 8 returns to O zero after sending the STATus OPERation EVENt command Returned Data after sending the STATus OPERation EVENt The command returns 256 if bit 8 of the Operation Status Register is set to 1 The command returns 0 if bit 8 of the Operation Status Register is set to 0 Event Register Cleared Reading the Event Register with STATus OPERation EVENt clears the register Aborting a Scan Aborting a scan will leave bit 8 set to O Related Commands ROUTe SCAN Reading the Operation Status Register After a Scanning Cycle STAT OPER Return the bit values of the Operation Status Register read the register value 256 shows bit 8 is set to 1 0 shows bit 8 is set to 0 STATus PRESet affects only the Enable Register by setting all Enable Register bits to O It does not affect either the status byte or the standard event status PRESet does not clear any of the Event Registers 90 Switchbox Command Reference Chapter 4 SYSTem The SYSTem subsystem returns the error numbers and error messages in the error queue of a switchbox It can also return the types and de
108. n card 2 66 Switchbox Command Reference Chapter 4 Parameters Linking Commands Parameter Types The following table contains explanations and examples of parameter types you might see later in this chapter Table 4 1 Parameter Type Explanations and Examples Numeric Accepts all commonly used decimal representations of number including optional signs decimal points and scientific notation 123 123E2 123 1 23E2 123 1 23E 2 1 23000E 01 Special cases include MINimum MAXimum and DEFault Boolean Represents a single binary condition that is either true or false ON OFF 1 0 Discrete Selects from a finite number of values These parameters use mnemonics to represent each valid setting An example is the TRIGger SOURce source command where source can be BUS EXT HOLD or IMM Optional Parameters Parameters shown within square brackets are optional parameters the brackets are not part of the command and are not sent to the instrument If you do not specify a value for an optional parameter the instrument chooses a default value For example consider the ARM COUNt lt MIN MAX gt command If you send the command without specifying a parameter the present ARM COUNt setting is returned If you send the MIN parameter the command returns the minimum count available If you send the MAX parameter the command returns the maximum count available Be sure to place a space between
109. n you are reading or writing to a multiplexer register a hexadecimal or decimal register address is specified This address consists of a base address plus a register offset The base address used in register based programming depends on whether the A16 address space is outside or inside the E1406 Command Module When the E1406 Command Module is not part of your VXIbus system Figure B 1 the multiplexer s base address is computed as shown where Module the 16 at the end of the address indicates a hexidecimal number C000 6 LADDR 64 49 152 LADDR 64 C000 49 152 is the starting location of the register addresses LADDR is the multiplexer s logical address and 64 9 is the number of address bytes per VXI device For example the multiplexer s factory set logical address is 112 7016 If this address is not changed the multiplexer will have a base address of 000 112 64 5 00016 1 00 or decimal 49 152 112 64 49 152 7168 56 320 REGISTER 16 BIT WORDS 6 scs s FFFF 16 e e C000 16 REGISTER 2846 Tree Relay Control Register ADDRESS 2616 Bank B Control Register b SPACE 2416 Bank B Control Register 2246 Bank A Control Register A16 2016 Bank A Control Register ADDRESS N e SPACE e S 0416 Status Control Register C000 A 2 Sae ET Device Type Ressler E1476 A16 R
110. nce 85 ROUTe SCAN MODE Example ROUTe SCAN MODE Returns the current state of the scan mode The command returns NONE VOLT RES or FRES if the scan mode is in the none volts two wire ohms or four wire ohms measurement mode respectively Query Scan Mode Since this example selects the FRES 4 wire ohms mode the query command returns FRES SCAN MODE FRES Select the 4 wire ohms scanning mode SCAN MODE Query the scanning mode ROUTe SCAN PORT Parameters Comments Example ROUTe SCAN PORT lt port gt enables disables closing the VSA VSB CS RTA and RTB tree relays during scanning SCAN PORT ABUS allows the switch driver to close tree relays connecting channels to the analog bus and is required to make scanning measurements from the analog bus For correct measurement switching set the appropriate measurement mode with ROUTe SCAN MODE ROUTe SCAN PORT NONE prevents closing the tree relays during scan operation This is useful if your measurement instrument is not connected to the analog bus Name Type Range of Values Default Value lt port gt discrete ABUS NONE NONE Order of Command Execution The ROUTe SCAN PORT command can be executed after the ROUTe SCAN channel list command but must occur before the scan is initiated with the INIT command RST Condition ROUTe SCAN PORT NONE RST opens all switches on the card and resets the port to ROUTe SCAN PORT NONE Most uses of
111. nce RANGe AUTO Query autorange mode RESistance RESolution lt reso ution gt MIN MAX Specify resolution RESistance RESolution MIN MAX VOLTage AC Query resolution RANGe range MIN MAX Select measurement range VOLTage AC RANGe MIN MAX Query range VOLTage APERture lt time gt MIN Set aperture integration time in sec VOLTage APERture MIN MAX Query aperture integration time VOLTage DC RANGe range MIN MAX Select range VOLTage DC RANGe MIN MAX Query range VOLTage NPLC number MIN MAX Set integration time in PLCs VOLTage NPLC MIN MAX Query integration time VOLTage RANGe AUTO OFF 0 ON Enable disable autoranging 1VOLTage RANGe AUTO Query autorange mode VOLTage RESolution resolution Specify resolution VOLTage RESolution MIN MAX Query resolution SYSTem CDEScription card number Return description of multiplexer in scanning multimeter CTYPe card number Return card type of multiplexer in scanning multimeter ERRor Return error number message from error queue TRIGger COUNt 1 16777215 MIN Set number of triggers or scans COUNt MIN MAX Query trigger count DELay 0 16 777215 MIN MAX Set delay between trigger and start of measurement DELay MIN MAX Query trigger delay DELay AUTO OFF 0 ON 1 Enable disable automatic trigger delay DELay AUTO Query automatic trigger delay mode IMMediate Trigger immediately SOURce BUS EXT HOLD I
112. ng Multiplexer Channels This example opens channel 00 of a card number 1 multiplexer module and channel 63 of a card number 2 multiplexer module in a single switchbox configuration OPEN 100 263 Open channels 100 and 263 100 opens channel 00 of multiplexer 1 263 opens channel 63 of multiplexer 2 ROUTe OPEN channel list returns the current state of the channel s queried The lt channel_list gt has the form ccnn The command returns 1 if the channel is open or returns 0 if the channel is closed If a list of channels is queried a comma delineated list of O or 1 values is returned in the same order of the channel list Query is Software Readback The ROUTe OPEN command returns the current state of the hardware controlling the specified channel It does not account for a failed switch element Query Multiplexer Channel Open State OPEN 100 263 Open channels 100 and 263 100 opens channel 00 of multiplexer 1 263 opens channel 63 of multiplexer 2 OPEN 263 Query channel 263 ROUTe SCAN lt channel_list gt defines the channels to be scanned The channel list is in the form ccnn ccnn ccnn or where cc card number 00 99 and nn channel number 00 63 and 99 See comments for explanation of using the special case of 99 in the channel list Name Type Range of Values Default Value channel list numeric 00 cc63 cc99 N A Switch
113. ng language and the SICL interface library However you can use a PC connected via GPIB to the E1406 Command Module If you use the E1406 with SCPI commands you can use the 1476A SCPI driver installed in the E1406 firmware and register programming is not necessary Chapter 4 describes the SCPI commands for the switchbox driver The following example program contains segments that Read the ID and Device Type Registers Read the Status Register Close a group of channels and the associated tree relay Resets the module to open all channels Scans through all the channels on the module 110 Register Based Programming Appendix B Beginning of Program This program resets the E1476A reads the ID Register reads the Device Type Register closes tree relays and channels and reads the multiplexer s Relay Control Registers opens channels and scans all 64 channels on the module Borland Turbo C program using SICL I O calls include lt sicl h gt include lt stdio h gt include lt stdlib h gt include lt math h gt include lt dos h gt function prototypes void reset mux char base addr void delay unsigned milliseconds Program Main void main void double ldexp double i int exp char base addr int jy Kk unsigned short chan 0 15 reg chan 16 31 reg Bank A channels unsigned short chan 32 47 reg chan 48 63 reg Bank B channels
114. nt are discarded Reading the Error Queue SYST ERR Query the error queue 92 Switchbox Command Reference Chapter 4 TRIGger The TRIGger command subsystem controls the triggering operation of the E1476A Multiplexer modules in a switchbox Subsystem Syntax TRIGger IMMediate SOURCe lt source gt SOURce TRIGger IMMediate Comments Example TRIGger IMMediate causes a trigger to occur when the defined trigger source is TRIGger SOURce BUS or TRIGger SOURce HOLD This can be used to trigger a suspended scan operation Executing the TRIGger IMMediate Command A channel list must be defined with ROUTe SCAN channel list and INITiate IMMediate must be executed before TRIGger IMMediate will execute BUS or HOLD Source Remains If selected the TRIGger SOURce BUS or TRIGger SOURce HOLD commands remain in effect after triggering a switchbox with the TRIGger IMMediate command Related Commands INITiate ROUTe SCAN TRIGger SOURce Advancing Scan Using TRIGger Command TRIG SOUR HOLD Set trigger source to HOLD SCAN 100 163 Define channel list INIT Start scanning cycle loop statement Start count loop TRIG Advance scan to next channel increment loop Increment loop count Chapter 4 Switchbox Command Reference 93 TRIGger SOURce TRIGger SOURce source specifies the trigger source to advance the channel list during scanning Parameters Name Type Description BUS dis
115. onsists of closing the channel and its associated bank analog bus tree relay You can make a single scan through the channel list or scan a multiple number of times You also can scan the channel list continuously until the scan is aborted Figure 2 6 shows the j Ms ARM COUN lt number gt TRIG SOUR BUS HOLD EXT IMM TTLT ECLT OUTP EXT 1 OJONJOFF OUTP ECTL 1 O ON OFF OUTP TTLT 1 OJONJOFF INIT CONT 1 0JONJOFF SCAN MODE NONE VOLT RES FRES SCAN PORT ABUS SCAN channel list INIT TRIG A4 H N P 48 Switchbox Applications Figure 2 6 Command Sequence to Scan Channels Chapter 2 Chapter 2 NOTE The TRIGger SOURce command specifies the source to advance the scan The OUTPut command can be used to enable the E1406 Command Module s Trig Out port TTL Trigger bus line 0 7 or ECL Trigger bus lines 0 1 You can scan a channel or a list of channels using the SCAN command The tree relays listed in Table 2 2 are automatically switched when you specify the command SCAN PORT ABUS This command is required for the tree relays to function during the scan through the channel list The default value is SCAN PORT NONE which does not allow these relays to operate and connect channels to the analog bus At power on or after resetting the module with the RST command connection to the analog bus is disabled for scan operations You must execute SCAN PORT ABUS to enable analog bu
116. ource for the switchbox Command returns BUS EXT HOLD IMM TTLTO 7 or ECLTO 1 for sources BUS EXTernal HOLD IMMediate TTLTrgn or ECLTrgn respectively Example Querying the Trigger Source Chapter 4 This example sets external triggering and queries the trigger source Since external triggering is set TRIG SOUR returns EXT TRIG SOUR EXT Set external trigger source TRIG SOUR Query trigger source Switchbox Command Reference 95 SCPI Commands Quick Reference The following table summarizes the SCPI commands for the E1476A 64 Channel Relay Multiplexer used in a switchbox Command Description ABORt Abort a scan in progress ARM COUNt number Multiple scans per INIT command COUNt MIN MAX Query number of scans DISPlay MONitor CARD number AUTO Select module to be monitored MONitor CARD Query the card number MONitor STATe mode Select monitor mode MONitor STATe Query the monitor mode INITiate CONTinuous ON OFF Enable disable continuous scanning CONTinuous Query continuous scan state IMMediate Start a scanning cycle OUTPut ECLTrgn STATe ON OFF 1 0 Enable disable the specified ECL trigger line ECLTrgn STATe Query the specified ECL trigger line EXTernal STATe ON OFF 1 0 Enable disable the Trig Out port on the command module EXTernal STATe Query the external state TTLTrgn STATe ON OFF 110 Enable disable the specified TTL t
117. r inputs are connected to the multiplexer H L and G terminal connections on the terminal module Figure 1 2 shows the multiplexer front panel and pin out descriptions e Row pl PPM oy H Column 32 Cho Ch 1 Ch 2 Ch 3 Ch 28 Ch 30 29 1 Ch31 NV Ch 32 4th Row Description A IN Ch 33 Ch 34 Ch 35 THp Ch 36 Ch 37 Ch 38 Ch 39 Ch 40 L Ch 41 Ch 42 Ch 43 Ch 44 Ch 45 Ch 46 Ch 47 Ch 48 Ch 49 Ch 50 Ch 51 Ch 52 Ch 53 Ch 60 Ch 61 Ch 62 0 Ch63 Reference Thermistor Voltage Sense to Channel 93 x Analog Bus VM Input P Or IOTI No Connection _ Analog Bus G VM QI gt No Connection Reference Thermistor Current Source to Channel 94 IS Chapter 1 Figure 1 2 E1476A Multiplexer Front Panel and Pinouts Getting Started 13 Multiplexer Configurations Switchbox Scanning Voltmeter 14 Getting Started The E1476A multiplexer can be configured as a switchbox single module or multiple module or as a scanning voltmeter with the E1411B or E1326B 5 Digit Multimeter A switchbox configuration uses the SWITCH instrument driver and uses the commands in Ch
118. rigger line TTLTrgn STATe Query the specified TTL trigger line ROUTe CLOSe channe list Close channel s CLOSe channel list Query channel s closed OPEN channel list Open channel s OPEN channel list Query channel s opened SCAN channel list Define channels for scanning SCAN MODE mode Set scan mode to NONE VOLT RES or FRES SCAN MODE Query the scan mode SCAN PORT port Enable channel connections to analog bus ABUS or NONE STATus OPERation CONDition Return contents of the Operation Condition Register OPERation ENABle unmask Enable events in the Operation Event Register to be reported OPERation ENABle Return the unmask value set by the ENABle command OPERation EVENt Return the contents of the Operation Event RegisterSets PRESet Enable Register bits to 0 SYSTem CDEScription number Return description of module in a switchbox CPON number ALL Open all channels on specified module s number Return the module type ERRor Return error number message in a switchbox error queue TRIGger IMMediate Cause a trigger to occur SOURce BUS SOURce ECLTrgn SOURce EXTernal SOURce HOLD SOURce IMMediate SOURce TTLTrgn SOURce Trigger source is TRG Trigger is the VXIbus ECL trigger bus line n Trigger source is Trig In on the E1406 Hold off triggering Trigger source is the internal triggers Trigger is the VXIbus TTL trigger bus line n Query scan trigger source
119. riod Agilent will replace software media which does not execute its programming instructions due to such defects 3 Agilent does not warrant that the operation of Agilent products will be interrupted or error free If Agilent is unable within a reasonable time to repair or replace any product to a condition as warranted customer will be entitled to a refund of the purchase price upon prompt return of the product 4 Agilent products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use 5 The warranty period begins on the date of delivery or on the date of installation if installed by Agilent If customer schedules or delays Agilent installation more than 30 days after delivery warranty begins on the 31st day from delivery 6 Warranty does not apply to defects resulting from a improper or inadequate maintenance or calibration b software interfacing parts or supplies not supplied by Agilent c unauthorized modification or misuse d operation outside of the published environmental specifications for the product or e improper site preparation or maintenance 7 TO THE EXTENT ALLOWED BY LOCAL LAW THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION WHETHER WRITTEN OR ORAL IS EXPRESSED OR IMPLIED AND AGILENT SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OR CONDITIONS OF MERCHANTABILITY SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE 8 Agilent will
120. s Figure 1 18 Measurements shows the connection for two Terminal Panels ge 9 8 lebego 8 leleele Connect All Thermistors S on Both Panels Y o A o 2 alalelalee 9 leelejeee w Two E1586 Terminal Panels S using All Thermistors on Each Panel E Figure 1 18 Connecting Six Thermistors on Two Panels 30 Getting Started Chapter 1 Programming the Multiplexer To program the E1476A multiplexer using Standard Commands for Programmable Instruments SCPI you must select the interface address and SCPI commands used This section gives guidelines to program the multiplexer including Addressing the Multiplexer Default Conditions Start Up Exercises Addressing the To program the E1476A multiplexer using SCPI you must select the Multiplexer computer language interface address and SCPI commands to be used Guidelines to select SCPI commands for the multiplexer follow NOTE This discussion applies only to SCPI programming See Appendix B for information on register based programming of multiplexer registers To address specific channels within a multiplexer you must specify the SCPI command and multiplexer channel address For the multiplexer use CLOSe channel list to close the channels specifi
121. s in the form ccnn ccnn ccnn or ccnn ccnn where cc card number 00 99 and nn channel number 00 63 90 94 and 99 Channel numbers 95 96 97 and 98 will generate an error Name Type Range of Values Default Value channel list numeric CCOO cc63 cc90 cc94 cc99 N A Using Upper Range 99 in the Channel List Specifying the last channel as 99 such as 100 199 automatically opens all channels on the card number specified by cc including tree relays 90 through 94 Opening Channels To open a single channel use ROUT OPEN ccnn multiple channels use ROUT OPEN ccnn ccnn sequential channels use ROUT OPEN ccnn ccnn groups of sequential channels use ROUT OPEN ccnn ccnn ccnn ccnn or any combination of the above Opening Order is not Guaranteed Opening order for multiple channels with a single command is not guaranteed A list of channels will not all open simultaneously Use sequential OPEN commands if needed Opening the VSA VSB CS RTA and RTB Tree Relays Use channel numbers 90 91 92 93 and 94 to open the VSA ch 90 VSB ch 91 CS ch 92 RTA ch 93 and RTB ch94 Tree Relays See ROUTe CLOSe for a table describing these channels Related Commands ROUTe CLOSe ROUTe OPEN RST Condition All channels open 82 Switchbox Command Reference Chapter 4 Example ROUTe OPEN Comments Example ROUTe SCAN Parameters Chapter 4 Openi
122. s tree relay channels 90 91 and 92 operation The analog bus provides access to all three wires of the channel High Low and Guard Access is through the front panel analog bus connector usually connected to other multiplexers or to the E1411B multimeter or through the terminal module VM Input and VM OI terminals To scan modules in a switchbox you must first form a valid SWITCHBOX instrument See Figure 2 1 for a typical switchbox configuration For multiple module switchbox configurations channels to be scanned can extend across switch modules For example for a two module switchbox instrument SCAN 100 263 scans all channels of both multiplexer modules Use ARM COUNt number to set from 1 to 32767 scans Use INITiate CONTinuous ON to set continuous scanning Tree relays channels 90 through 94 are controlled automatically by the SWITCH driver SCAN command when used in conjunction with SCAN MODE or SCAN PORT ABUS Switchbox Applications 49 Example Scanning This example uses the TTL VXIbus triggers TTLT 0 7 to synchronize Using TTL VXIbus channel closures with the E1412A 6 Digit Multimeter A 2 wire ohms measurement is performed Measurement synchronization is attained by Triggers using the following E1406 and E1412A signals E1406 TTL Trig In is used by the multimeter to trigger the multiplexer to change channels E1406 TTL Trig Out is used by the multiplexer to trigger the multimeter for a
123. scriptions of modules cards in a switchbox Subsystem Syntax SYSTem CDEScription number CPON number ALL CTYPe number ERRor SYSTem CDEScription Parameters SYSTe Comments Example m CPON Parameters Chapter 4 Comments SYSTem CDEScription number returns the description of a selected module card in a switchbox Name Type Range of Values Default Value number numeric 1 through 99 N A 64 Channel 3 Wire Relay Multiplexer Module Description The SYSTem CDEScription command returns 64 Channel 3 Wire Relay Multiplexer Reading the Description of a Card 1 Module SYST CDES 1 Return the description SYSTem CPON number ALL opens the selected module card or all modules in a switchbox to their power on state Name Type Range of Values Default Value number numeric 1 through 99 N A Differences between RST and CPON SYSTem CPON ALL and RST opens all channels of all modules in switchbox while SYSTem CPON number opens the channels in only the module card specified in the command Switchbox Command Reference 91 Example SYSTem CTYPe Parameters Comments Example SYSTem ERRor Comments Example Setting Card 1 Module to its Power on State SYST CPON 1 Set module 1 channels to power on state open SYSTem CTYPe number returns the module card type of a selected module in a switchbox
124. sec execution time during which time the multiplexers are busy Bit 7 of this register is used to inform the user of a busy condition The interrupt generated after a channel has been closed can be disabled Bit 6 of this register is used to inform the user of the interrupt status As an example if the Status Register base 04 4 returns BDFF 1011110111111111 the multiplexer module is not busy bit 7 set and the module interrupts are disabled bit 6 set Writes to the Relay Control Registers base 2016 to 2816 allows you to open or close any of the 64 channel relays or the five tree relays Any number of relays per bank can be closed at a time Register Based Programming 105 For example to connect both bank A and bank B to the analog bus write a 1 to bits and 1 of the Tree Relay Control Register base 2816 to close channel 90 VSA and channel 91 VSB All other bits must be set to 0 Write undefined RTB RTA CS VSB VSA Read undefined Write a 1 to close a channel write a 0 to open a channel Reading the channel bit indicates the state of the relay driver circuit only It cannot detect a defective relay bitO VSA ch90 Connects the Voltage Sense H L G terminals of the Analog Bus to Bank A bit 1 VSB ch91 Connects the Voltage Sense H L G terminals of the Analog Bus to Bank B bit2 CS c
125. t C d oo L oo gt 66 gt 1 5K OHM i REFERENCE REF THERMISTER RELAYS 1 THERMISTOR RTB CH94 I SOURCE oo gt H H gt 1 oo gt gt VOLTAGE SENSE BANKB 1 32 CH32 CH63 4 2 o gt LIL gt o 6 618 000 CS CH92 i CURRENT SOURCE BANK B VOLTAGESENSEBUS ANALOGBUS VM INPUT ANN H H gt LIL gt 2616 gt 1 ANI ANI amp 1 n TO E1412A OR gt EXTERNAL OR ANN OTHER DEVICE ANA gt LIL gt els 100 CURRENT SOURCE BUS VM DL THERMOCOUPLE NL Jumper Low to Guard to eliminate measurement errors Figure 2 5 Example Temperature Measurements 46 Switchbox Applications Chapter 2 Chapter 2 The procedure to make temperature measurements is 1 Measure the resistance of the 5 KO thermistor on the terminal module Thr ohms A 4 wire ohms measurement should be made to avoid measurement errors by the 100 protection resistors see Example Four Wire Resistance Measurements Compute the temperature of the terminal module Tref from the reading Thr ohms For values of resistance between 92 7 Q to 3 685E6 Q use the following equation to calculate the temperature of the terminal module where Tref temperature in degrees C an
126. tact from the connector Order Agilent part number 1252 6533 or ERNI part number 014728 Crimp and The hand crimp tool Agilent part number 8710 2306 or ERNI part number 014374 is used for crimping Insert Tools contacts onto a conductor The pin extractor tool Agilent part number 8710 2307 or ERNI part number 471555 is required for removing contacts from the crimp and insert connector These products are not included with Option A3E or with the terminal option accessories listed earlier Extra Crimp The crimp and insert connector is normally supplied with Option A3E Contact Agilent if additional and Insert connectors are needed Connectors 96 Pin Connector Body Agilent Part Number 1252 6532 ERNI Part Number 024069 160 Pin Connector Body Agilent Part Number 1252 6531 ERNI Part Number 024070 20 Getting Started Chapter 1 Wiring a Terminal Module Remove clear cover Figure 1 10 gives guidelines to connect user field wiring to the spring clamp and to the crimp and insert terminal modules Remove and retain wiring exit panel A Release screws Remove 1 of the 3 wire exit panels B Press tab forward and release 9 Make connections 5mm 0 2 Depress terminal lever s Insert wire s into terminal s Release levers Use wire size 22 26 Gage Use wire size 22 26 AWG 2 7 y Spring Clamp P d Crimp and Insert D
127. th the E1411 or E1326 used with a C size adapter installed in the C size mainframe 572 Digit Multimeter The E1476A can be used with the multimeter to measure voltage resistance or temperature The multimeter used must be an E1411 or E1326 used with a C size adapter installed in the C size mainframe The device driver for these two multimeters controls switches in the scan mode The scanning voltmeter can be configured to perform voltage 2 wire ohms 4 wire ohms or temperature measurements via the multiplexer internal analog bus The E1326 E1411 multimeter automatically controls the channels and tree relays when you use the MEASure or CONFigure commands See Table 3 1 for tree relays Table 3 1 Tree Relay Descriptions Function Channel Designation Description Analog Bus 90 VSA Connects the Voltage Sense H L G Relays terminals of the Analog Bus to Bank A 91 VSB Connects the Voltage Sense H L G terminals of the Analog Bus to Bank B 92 CS Connects the Current Source H L G terminals of the Analog Bus to Bank B Relays Reference Thermistor 93 RTA Connects the Reference Thermistor to Bank A for voltage sense 94 RTB Connects the Reference Thermistor to Bank B for current source Device Drivers The Analog Bus The scanning voltmeter configuration does not use the SWITCH switchbox device driver so you cannot use the switchbox command reference in Chapter 4 Instead you use the VOLTMT
128. the command and the parameter Linking IEEE 488 2 Common Commands with SCPI Commands Use a semicolon between the commands For example RST OUTP ON or TRIG SOUR HOLD TRG Linking Multiple SCPI Commands Use both a semicolon and a colon between the commands For example ARM COUN1 TRIG SOUR EXT SCPI Command Reference Chapter 4 This section describes the Standard Commands for Programmable Instruments SCPI commands for the E1476A Multiplexer module Commands are listed alphabetically by subsystem and within each subsystem There are two ways to send commands to the instrument The most often used way is from a controller over the GPIB interface This method is called the GPIB interface in the command reference The second way is to send commands is from aterminal connected to the E1406 command module RS 232 Commands sent this way are referred to as from the terminal in the command reference Switchbox Command Reference 67 ABORt Subsystem Syntax Comments The ABORt command stops a scan in progress when the trigger sources are either TRIGger SOURce BUS or TRIGger SOURce HOLD See the comments to stop a scan if trigger source is not BUS or HOLD ABORt Channel Status After an ABORT Aborting a scan will leave the last channel it closed in the closed position Effect on Scan Complete Status Bit Aborting a scan will not set the scan complete status bit Stopping Scans Enabled from GPIB Interface When a s
129. the multiplexer until you have verified correct multiplexer operation If you have already connected user inputs to the terminal module you may want to remove the terminal module from the switch module while doing these exercises If you use an E1406 Command Module you can check the command module for the correct version of the SWITCH device driver for the E1476A Skip this step and go to Exercise 2 if you do not use an E1406 Command Module Power up the mainframe with the command module installed The command module is the resource manager at logical address 0 and is typically addressed in the mainframe by 70900 Input this BASIC program into your computer 10 DIM A 256 20 OUTPUT 70900 DIAG DRIV LIST 30 ENTER 70900 A 40 PRINT A 50 END RUN the program and look for the device driver SWITCH SWITCHBOX A 08 00 RAM RAM could be FLASH flash ROM depending on where the device driver is loaded DIAGnostic DRIVer LIST queries the command module at address 70900 for a list of the device drivers loaded in the command module A typical response should be similar to the following and will depend on the specific drivers that were previously loaded in the command module SYSTEM E1406A A 08 00 ROM A 04 02 ROM VOLTMTR E1326A A 06 00 ROM SWITCH SWIT CHBOX A 08 00 RAM COUNTER E1332A A 04 02 ROM E1333A A 04 02 ROM DIG_I O E1330A A 04 03 ROM D A E1328A A 04 02 ROM If you are using an E1411B or E1326B multimeter with E1476A multip
130. this multiplexer will require use of ROUTe SCAN PORT ABUS to allow subsequent channel connection to the analog bus Selecting the ABUS Port TRIG SOUR EXT Select external trigger source SCAN MODE FRES Select the 4 wire ohms scanning mode SCAN PORT ABUS Select the ABUS port SCAN 100 107 Set channel list INIT Start scanning cycle 86 Switchbox Command Reference Chapter 4 STATus The STATus subsystem reports the bit values of the Operation Status Register It also allows you to unmask the bits to be reported from the Standard Event Register and to read the summary bits from the Status Byte Register Subsystem Syntax STATus OPERation CONDiition ENABle unmask EVENt PRESet The STATus system contains four registers that reside in a SCPI driver not in the hardware see Figure 4 1 Two registers are under IEEE 488 2 control the Standard Event Status Register ESE and the Status Byte Register 5 The operational status bit OPR service request bit RQS standard event summary bit ESB message available bit MAV and questionable data bit QUE in the Status Byte Register bits 7 6 5 4 and 3 respectively can be queried with the STB command Use the ESE command to query the unmask value for the Standard Event Status Register the bits you want logically ORed into the summary bit The registers are queried using decimal weighted bit values The decimal equivalents for bits 0
131. through 15 are included in Figure 4 1 A numeric value of 256 executed in a STAT OPER ENABle unmask command allows only bit 8 to generate a summary bit The decimal value for bit 8 is 256 The decimal values are also used in the inverse manner to determine which bits are set from the total value returned by an EVENt or CONDition query The SWITCH driver exploits only bit 8 of Operation Status Register This bit is called the Scan Complete bit that is set whenever a scan operation completes Since completion of a scan operation is an event in time bit 8 will never appear set when STAT OPER COND is queried However you can find bit 8 set with the STAT OPER EVEN query command Chapter 4 Switchbox Command Reference 87 Automatically Set at Power On Conditions Automatically Set by Parser Set by OPC Related Commands are OPC and WAI Operation Status Register STATus OPERation CONDition Standard Event Register NOTE ESR QUE Questionable Data MAV Message Available ESB Standard Event ESE lt unmask gt ESE Power On 0 RQS Request Service User Request 1 OPR Operation Status Command Error 2 C Condition Register Execution Error 3 EV Event Register Device Dependent Error 4 EN Enable Register Query Error 5 SRQ Sevice Request Request Control 6 Operation Complete 7 EV Status Byte Register STB SPOLL SRE unmask
132. truments in the mainframe and connect the Analog Bus cable between the E1411B multimeter and the E1476A multiplexer Then connect resistors and or Zero Ohm jumpers to desired channels between 0 and 31 on the terminal module Prog ramming the When the configuration is complete turn mainframe power ON and verify Scanning Voltmeter X that the VOLTMETR driver version A 06 00 is installed in the E1406 Command Module see Exercise 1 in Chapter 1 If the appropriate VOLTMETR driver is installed run the following program This example scans 32 multiplexer channels and makes a measurement on each channel The measured readings are entered into the computer and displayed after the scan Table 3 3 shows how to modify the program to make voltage 2 Wire Ohms 4 Wire Ohms Thermocouple and Thermistor measurements NOTE Forthe example program when the multimeter buffer fills measurements are suspended until readings are read from the buffer by the computer to make space available 10 DIM Rdgs 1 32 Dimension array to store readings 20 CLEAR 70903 Clear the scanning voltmeter 30 OUTPUT 70903 RST Reset the scanning voltmeter 40 OUTPUT 70903 MEAS VOLT DC 100 131 Configure the multimeter for DC voltage measurements and specify channel list to scan channels 00 through 31 50 ENTER 70903 Rdgs Enter measured readings 60 PRINT Rdgs Display measured readings 70 END Table 3 3 Changes to Example Program
133. ts scanning by closing the first channel in the channel list Each trigger received advances the scan to the next channel in the channel list An invalid channel list generates an error see ROUTe SCAN Stopping Scanning Cycles See the ABORt command Related Commands ABORt ARM COUNT INITiate CONTinuous TRIGger TRIGger SOURce RST Condition None Starting a Single Scan SCAN 100 163 Set channel list INIT Start scanning cycle by closing channel 00 and proceeding 76 Switchbox Command Reference Chapter 4 OUTPut The OUTPut command subsystem enables one trigger line of the E1406 Command Module It also can disable the active line Subsystem Syntax ECLTrgn ECLTrgO or ECLTrg1 STATe mode STATe EXTernal STATe mode STATe TTL Tran TTLTrgO through TTLTrg7 STATe mode STATe OUTPut ECLTrgn STATe OUTPut ECLTrgn STATe lt mode gt enables ON or 1 or disables OFF or 0 the ECL trigger bus pulse on the VXI bus line specified by n There are two ECL trigger lines on the VXI bus allowing valid values for n to be 0 and 1 mode enables ON or 1 or disables OFF or 0 the specified ECL Trigger bus line Parameters Name Type Range of Values Default Value n numeric 0 or 1 N A mode boolean ON OFF 1 0 OFF 0 Comments When OUTPut ECLTrgn STATe ON is set a trigger pulse occurs each time a channel is closed during a scan OUT
134. us OFF or INITiate CONTinuous 0 command Sending the INITiate IMMediate command closes the first channel in the channel list Each trigger from the trigger source specified by the TRIGger SOURce command advances the scan through the channel list A trigger at the end of the channel list opens the last channel in the list and the scanning cycle stops Note The INITiate CONTinuous command does not start a scanning cycle see INITiate IMMediate Stopping Continuous Scan See the ABORt command Related Commands ABORt ARM COUNTt INITiate IMMediate TRIGger SOURce RST Condition INITiate CONTinuous OFF O Switchbox Command Reference 75 Example Enabling Continuous Scans INIT CONT ON Enable continuous scanning SCAN 100 163 Set channel list INIT Start scanning cycle INITiate CONTinuous Example INITiate CONTinuous queries the scanning state With continuous scanning enabled the command returns 1 ON With continuous scanning disabled the command returns 0 OFF Query Continuous Scanning State INIT CONT ON Enable continuous scanning INIT CONT Query continuous scanning state INITiate IMMediate Comments Example INITiate IMMediate starts the scanning process and closes the first channel in the channel list Successive triggers from the source specified by the TRIGger SOURce command advances the scan through the channel list Starting the Scanning Cycle The INITiate IMMediate command star
135. ust be taken that the instrument receiving the DISPlay command is the same one that is currently selected on the terminal Otherwise the GPIB command will have no visible affect Subsystem Syntax DISPlay MONItor CARD number AUTO CARD STATe mode STATe DISPLay MONitor CARD DISPlay MONitor CARD lt number gt AUTO selects the module in a switchbox to be monitored You must use DISP MON STAT ON to actually display the monitored module state to the RS 232 terminal Parameters Name Type Range of Values Default Value number AUTO numeric 1 99 AUTO Comments Selecting a Specific Module to be Monitored Send the card number in a switchbox with the DISPlay MONitor CARD command Selecting the Present Module to be Monitored Use the DISPlay MONitor CARD AUTO command to select the last module addressed by a switching command ROUTe CLOSe for example RST Conditions DISPlay MONitor CARD AUTO Example Select Module 2 in a Switchbox for Monitoring DISP MON CARD 2 Select module 2 in a switchbox 72 Switchbox Command Reference Chapter 4 DISPLay MONitor CARD DISPlay MONitor CARD queries the setting of the DISPlay MONitor CARD command and returns the module in a switchbox to be monitored DISPLay MONitor STATe DISPlay MONitor STATe lt mode gt turns the monitor mode ON or OFF When monitor mode is on the RS 232 terminal display presents an array of values indicating the op
136. ut the INIT command 2009 Too many channels in Attempting to address more channels than available in the switchbox channel list 2010 Scan mode not The selected scanning mode is not allowed with this module or you have allowed on this card misspelled the mode parameter see SCAN MODE commana 2011 Empty channel list No valid channels are specified in the channel list 2012 Invalid Channel Range Invalid channel s specified in SCAN channel list command Attempting to begin scanning when no valid channel list is defined 2017 Config error 17 Slot O Attempt to run a downloaded scan list with ARM COUNt set to a value functions disabled other than 1 Applies to FET switches only 2600 Function not Sending a command to a module card in a switchbox that is not supported on this card supported by the module or switchbox 2601 Channel list required Sending a command requiring a channel list without the channel list 116 E1476A Error Messages Appendix C Appendix D Relay Life Replacement Strategy Relay Life Factors NOTE Electromechanical relays are subject to normal wear out Relay life depends on several factors The replacement strategy depends on the application If some relays are used more often or at a higher load than other relays the relays can be individually replaced as needed If all relays see similar loads and switching frequencies the entire circuit board can be replaced when the end of relay l

Agilent Technologies E1476A 64-Channel, 3-Wire

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