Agilent E1343A User Manual

Download

Agilent 75000 Series C

Agilent E1343A/E1344A/E1345A/E1347A 16-Channel Relay Multiplexer Module

User’s Manual and SCPI Programming Guide

Where to Find it - Online and Printed Information:

System installation (hardware/software)............VXIbus Configuration Guide*

Module configuration and wiring.......................This Manual

SCPI Programming.............................................This Manual

SCPI Example Programs....................................This Manual

SCPI command reference...................................This Manual

VXIplug&play programming ............................VXIplug&play Online Help

VXIplug&play example programs .....................VXIplug&play Online Help

VXIplug&play function reference......................VXIplug&play Online Help

Soft Front Panel information..............................VXIplug&play Online Help

VISA language information................... .... .........VISA User's Guide

*Supplied with Agilent Comm and Modules, Embedded Controllers, and VXLink.

*E1345-90005*

Manual Part Number: E1345-90005

Printed in Malaysia E0206

Contents

Warranty ....................................................................................................................... 5

Safety Symbols ............................................................................................................. 6

WARNINGS................................................................................................................. 6

Declaration of Conformity............................................................................................ 7

Reader Comment Sheet ................................................................................................ 9

Chapter 1

Getting Started ............................................................................................................. 11

Using This Chapter ..................................................................................................... 11

Multiplexer Module Description ................................................................................ 11

General Description ............................................................................................. 11

Multiplexer Channel Descriptions and Connections ........................................... 11

Programming the Multiplexer Module ....................................................................... 14

Selecting Channels .............................................................................................. 14

SCPI Command Format Used in This Manual .................................................... 16

Initial Operation.......................................................................................................... 17

Chapter 2

Configuring the Relay Multiplexer Modules ............................................................ 19

Warnings and Cautions............................................................................................... 19

Connecting Field Wiring ............................................................................................ 20

Wiring Guidelines ............................................................................................... 20

Wiring a Terminal Module ......................................................................................... 21

Connecting the Analog Bus ........................................................................................ 22

Setting the Card ID ..................................................................................................... 23

Setting the Logical Address Switch............................................................................ 23

Using the Multiplexer Module with an HP Mainframe or Command Module ..........24

Using the Scanning Voltmeter Configuration ..................................................... 24

Using the Switchbox Configuration .................................................................... 25

Verifying Correct Logical Address Settings ....................................................... 25

Selecting the Interrupt Priority ................................................................................... 26

5 Volt Excitation for Strain Gages.............................................................................. 27

Adding Signal Conditioning Components/Current Shunts......................................... 27

Connecting User Inputs .............................................................................................. 29

Chapter 3

Using the Relay Multiplexer Modules ........................................................................ 31

Using This Chapter ..................................................................................................... 31

Multiplexer Commands .............................................................................................. 31

Connecting Switchbox Channels to Common ............................................................ 32

Connecting Switchbox Channels to Tree Terminals for Making Measurements....... 34

Scanning a Range of Switchbox Channels ................................................................. 36

Measuring Temperature Using Thermocouples

(E1344A/47A Modules Only).................................................................................. 39

Contents 1

Chapter 4

Understanding the Relay Multiplexer Modules ........................................................ 41

Using This Chapter ..................................................................................................... 41

Commands for Scanning Switchbox Channels........................................................... 41

Using Scanning Trigger Sources ................................................................................ 41

Scanning with External Instruments ................................................................... 41

Using the Scan Complete Bit......................................................................................46

Chapter 5

Relay Multiplexer Command Reference ................................................................... 47

Using This Chapter ..................................................................................................... 47

Command Types ......................................................................................................... 47

Common Command Format ................................................................................ 47

SCPI Command Format ......................................................................................47

Linking Commands ............................................................................................. 49

SCPI Command Reference ......................................................................................... 49

ABORt ........................................................................................................................ 50

ARM ........................................................................................................................... 51

:COUNt ............................................................................................................... 51

:COUNt? .............................................................................................................. 52

DISPlay....................................................................................................................... 53

:MONitor:CARD ................................................................................................. 53

:MONitor[:STATe] ............................................................................................. 54

INITiate....................................................................................................................... 55

:CONTinuous ...................................................................................................... 55

:CONTinuous? .................................................................................................... 56

[:IMMediate] ....................................................................................................... 56

OUTPut....................................................................................................................... 57

[:STATe] ............................................................................................................. 57

[:STATe]? ............................................................................................................ 57

[ROUTe:] .................................................................................................................... 58

CLOSe ................................................................................................................. 58

CLOSe? ............................................................................................................... 59

OPEN .................................................................................................................. 59

OPEN? ................................................................................................................. 60

SCAN .................................................................................................................. 60

SCAN:MODE ..................................................................................................... 61

SCAN:MODE? .................................................................................................... 62

SCAN:PORT ....................................................................................................... 62

STATus....................................................................................................................... 63

:OPERation:ENABle ........................................................................................... 63

:OPERation[:EVENt]? ........................................................................................ 64

SYSTem...................................................................................................................... 65

:CDEScription? ................................................................................................... 65

:CPON ................................................................................................................. 66

:CTYPe? .............................................................................................................. 66

:ERRor? ............................................................................................................... 67

2 Contents

Chapter 5

Relay Multiplexer Command Reference (continued)

TRIGger ...................................................................................................................... 68

[:IMMediate] ....................................................................................................... 68

:SOURce .............................................................................................................. 69

:SOURce? ............................................................................................................ 70

IEEE 488.2 Common Commands............................................................................... 71

Command Quick Reference........................................................................................ 72

Appendix A

16-Channel Relay Multiplexer Specifications ........................................................... 73

E1343A/44A 16-Channel Relay Multiplexer ............................................................. 73

E1345A/47A 16-Channel Relay Multiplexer ............................................................. 74

Relay Life ................................................................................................................... 75

End of Life Detection ................................................................................................. 75

Replacement Strategy ................................................................................................. 75

Appendix B

16-Channel Relay Multiplexer Registers ................................................................... 77

Computer Configurations .................................................................................... 78

Reading the Registers .......................................................................................... 81

Writing to the Registers ....................................................................................... 82

Appendix C

16-Channel Relay Multiplexer Error Messages ........................................................ 85

Contents 3

Notes:

4 Contents

Certification

Agilent Technologies, Inc. certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that organization's calibration facility, and to the calibration facilities of other International Standards Organization members.

Warranty

This Agilent Technologies product is warranted against defects in materials and workmanship for a period of one year from date of shipment. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of) other Agilent products. During the warranty period, Agilent Technologies, Inc. will, at its option, either repair or replace products which prove to be defective.

For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies. Buyer shall prepay shipping charges to Agilent and Agilent shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent from another country

Agilent warrants that its software and firmware designated by Agilent for use with a product will execute its programming instructions when properly installed on that product. Agilent does not warrant that the operation of the product, or software, or firmware will be uninterrupted or error free.

Limitation Of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied products or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

The design and implementation of any circuit on this product is the sole responsibility of the Buyer. Agilent does not warrant the Buyer's circuitry or malfunctions of Agilent products that result from the Buyer's circuitry. In addition, Agilent does not warrant any damage that occurs as a result of the Buyer's circuit or any defects that result from Buyer-supplied products.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. AGILENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Exclusive Remedies

THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

Notice

The information contained in this document is subject to change without notice. AGILENT TECHNOLOGIES, INC. MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Agilent shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance or use of this material. This document contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Agilent Technologies, Inc. Agilent assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Agilent.

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 in FAR 52.227-19 (Jun

1987)(or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Agilet standard software agreement for the product involved

Agilent E1343A/44A/45A/47A User's Manual

Edition 5

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 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .September 1989

Update 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .September 1990

Edition 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ju.ly 1992

Edition 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . April 1993

Edition 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .May 1995

Edition 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . April 1997

Safety Symbols

Instruction manual symbol affixed to

Instruction manual symbol affixed to product. Indicates that the user must refer to

product. Indicates that the user must refer to the manual for specific WARNING or

the manual for specific WARNING or CAUTION information to avoid personal

CAUTION information to avoid personal injury or damage to the product.

injury or damage to the product.

Indicates the field wiring terminal that must be connected to earth ground before operating the equipment — protects against electrical shock in case of fault.

WARNING

Alternating current (AC)

Direct current (DC).

Indicates hazardous voltages.

Calls attention to a procedure, practice, or condition that could cause bodily injury or death.

Frame or chassis ground terminal—typically connects to the equipment's metal frame.

CAUTION

Calls attention to a procedure, practice, or condition that could possibly cause damage to 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, Inc. 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.

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 an Agilent Technologies Sales and Service Office 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 an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.

DECLARATION OF CONFORMITY

According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014

Manufacturer’s Name: Manufacturer’s Address:

Agilent Technologies, Incorporated 815 – 14th St. SW Loveland, Colorado 80537 USA

Declares, that the product

Product Name: Model Number:

16 Ch GP High Voltage Relay Multiplexer E1343A

Product Options: This declaration covers all options of the above product(s).

Conforms with the following European Directives:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.

Conforms with the following product standards: EMC Standard

CISPR 11:1990 / EN 55011:1991 EN50082-1 :1992 IEC 1000-4-2 :1995 IEC 1000-4-3 :1995 IEC 1000-4-4 :1995

The produt was tested in a typical configuration with Agilent Technologies or Hewlett-Packard Company test systems

Safety

IEC 1010-1:1990+A2:1996 / EN 61010-1:1993 Canada: CSA C22.2 No. 1010.1:1992 UL 3111-1 : 1994

Limit

Group 1 Class A 4kV CD, 8kV AD

3 V/m

0.5kV signal lines, 1kV power lines

3 May 2001

Date

Ray Corson

Product Regulations Program Manager

Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany

Revision: B.01 Issue Date: 3 May 2001 Document E1343A.DOC

For further information, please contact your local Agilent Technologies sales office, agent or distributor.

DECLARATION OF CONFORMITY

According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014

Manufacturer’s Name: Manufacturer’s Address:

Agilent Technologies, Incorporated 815 – 14th St. SW Loveland, Colorado 80537 USA

Declares, that the product

Product Name: Model Number:

16 Ch T/C High Voltage Relay Multiplexer E1344A

Product Options: This declaration covers all options of the above product(s).

Conforms with the following European Directives:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.

Conforms with the following product standards: EMC Standard

CISPR 11:1990 / EN 55011:1991 EN50082-1 :1992 IEC 1000-4-2 :1995 IEC 1000-4-3 :1995 IEC 1000-4-4 :1995

The produt was tested in a typical configuration with Agilent Technologies or Hewlett-Packard Company test systems

Safety

IEC 1010-1:1990+A2:1996 / EN 61010-1:1993 Canada: CSA C22.2 No. 1010.1:1992 UL 3111-1 : 1994

Limit

Group 1 Class A 4kV CD, 8kV AD

3 V/m

0.5kV signal lines, 1kV power lines

3 May 2001

Date

Ray Corson

Product Regulations Program Manager

Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany

Revision: B.01 Issue Date: 3 May 2001 Document E1344A.DOC

For further information, please contact your local Agilent Technologies sales office, agent or distributor.

DECLARATION OF CONFORMITY

According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014

Manufacturer’s Name: Manufacturer’s Address:

Agilent Technologies, Incorporated 815 – 14th St. SW Loveland, Colorado 80537 USA

Declares, that the product

Product Name: Model Number:

16 Channel Relay Multiplexer E1345A

Product Options: This declaration covers all options of the above product(s).

Conforms with the following European Directives:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.

Conforms with the following product standards: EMC Standard

CISPR 11:1990 / EN 55011:1991 EN50082-1 :1992 IEC 801-2 :1991 IEC 801-3 :1984 IEC 801-4 :1988

The produt was tested in a typical configuration with Agilent Technologies or Hewlett-Packard Company test systems

Safety

IEC 1010-1:1990+A2:1996 / EN 61010-1:1993 Canada: CSA C22.2 No. 1010.1:1992 UL 3111-1 : 1994

Limit

Group 1 Class A 4kV CD, 8kV AD

3 V/m

0.5kV signal lines, 1kV power lines

3 May 2001

Date

Ray Corson

Product Regulations Program Manager

Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany

Revision: B.01 Issue Date: 3 May 2001 Document E1345A.DOC

For further information, please contact your local Agilent Technologies sales office, agent or distributor.

DECLARATION OF CONFORMITY

According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014

Manufacturer’s Name: Manufacturer’s Address:

Agilent Technologies, Incorporated 815 – 14th St. SW Loveland, Colorado 80537 USA

Declares, that the product

Product Name: Model Number:

16 Channel T/C Low Offset Relay Multiplexer E1347A

Product Options: This declaration covers all options of the above product(s).

Conforms with the following European Directives:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly.

Conforms with the following product standards: EMC Standard

CISPR 11:1990 / EN 55011:1991 EN50082-1 :1992 IEC 1000-4-2 :1995 IEC 1000-4-3 :1995 IEC 1000-4-4 :1995

The produt was tested in a typical configuration with Agilent Technologies or Hewlett-Packard Company test systems

Safety

IEC 1010-1:1990+A2:1996 / EN 61010-1:1993 Canada: CSA C22.2 No. 1010.1:1992 UL 3111-1 : 1994

Limit

Group 1 Class A 4kV CD, 8kV AD

3 V/m

0.5kV signal lines, 1kV power lines

3 May 2001

Date

Ray Corson

Product Regulations Program Manager

Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβe 130, D 71034 Böblingen, Germany

Revision: B.01 Issue Date: 3 May 2001 Document E1347A.DOC

For further information, please contact your local Agilent Technologies sales office, agent or distributor.

Using This Chapter

This chapter describes the E1343A 16-Channel High Voltage Relay, E1344A 16-Channel General Purpose Thermocouple High Voltage Relay, E1345A 16-Channel Relay, and E1347A 16-Channel Thermocouple Relay Multiplexer Modules, and shows how to program the modules using SCPI commands (Standard Commands for Programmable Instruments). This chapter contains the following sections:

• Multiplexer Module Description. . . . . . . . . . . . . . . . . . . . . . Page 11

• Programming the Multiplexer Module . . . . . . . . . . . . . . . . . Page 14

• Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17

Multiplexer Module Description

Refer to Figure 1-1 for the following explanations of all four 16-Channel Relay Multiplexer Modules.

Chapter 1

Getting Started

General Description The multiplexer module switches (multiplexes) up to 16 channels. Each

channel provides High (H), Low (L), and Guard (G) connections.

The multiplexer module consists of a component assembly and a terminal module. The channel relay switches are on the component assembly. The field wiring from user sources (e.g., thermocouples) connects to the terminal module. The terminal module also provides connections for multimeters, voltmeters, counters, and other measuring devices.

Multiplexer Channel

Descriptions and

Connections

The channel relay switches are separated into two banks, Bank 0 and Bank 1. Channels 00 to 07 are in Bank 0 and channels 08 to 15 are in Bank 1. Each bank has its own H, L, and G Common terminals to which the channel switches connect.

The channel switches also connect, through the AT and BT Tree Switches, to the AT and BT Tree Switch Terminals, respectively. The Bank 0 channels connect to the AT Tree Switch Terminals and the Bank 1 channels connect to the BT Tree Switch Terminals. An additional tree switch, the AT2 Tree Switch, provides connection of the Bank 1 channels to AT Tree Switch Terminals. Use channel numbers 90, 91, and 92 to select the AT, BT, and AT2 Tree Switches, respectively.

Connecting to the Tree Switch Terminals is the preferred method to connect measuring devices, like multimeters, to measure the multiplexer channels. This allows you to connect the measuring device to either the Bank 0 or Bank 1 channels at any given time, or to the channels of both banks.

Getting Started 11Chapter 1

The AT Tree Switch Terminals also connect to the H, L, and G connections on the Analog Bus Connector. The BT Tree Switch Terminals also connect to the I+, I-, and IG connections on the Analog Bus Connector. The Analog Bus Connector provides direct channel connections between multiple multiplexer modules, and connections between a multiplexer module and the E1326/E1411 Multimeters. Cables make the necessary connections without the need to externally wire the multimeter/multiplexer modules via the terminal modules.

The 16-Channel Thermocouple Relay Multiplexer Modules (E1344A and E1347A) uses the RT Tree Switch (Channel 93) to connect the thermistor on the terminal module to the Bank 1 channel common. The thermistor can be measured to determine the temperature inside of the terminal module to compensate for temperature measurements made with thermocouples (see Chapter 3).

Each channel High (H) line has a jumper on the terminal module that may be removed to add filter components (see Chapter 2 under the “Adding Signal Conditioning Components/Current Shunts” heading). Each Bank 0 and Bank 1 common line, the AT and BT Tree Switch, and the Analog Bus lines all have 100 ohm resistors in series with each line. The resistors provide relay protection and are located on the component module.

12 Getting Started Chapter 1

Figure 1-1. Multiplexer Module Block Diagram

Getting Started 13Chapter 1

Programming the Multiplexer Module

The multiplexer modules are programmed either in a switchbox or scanning voltmeter configuration. To program the multiplexer modules using the Standard Commands for Programmable Instruments (SCPI), you must select the controller language, interface address, and SCPI commands to be used. See the 75000 Series B Installation and Getting Started Guide or the E1406 Command Module Manual for interface addressing and controller language information of multiplexer modules in a switchbox or scanning voltmeter configuration. If using the E1300 Mainframe or E1405

Command Module, you MUST have version 06.00 (or greater) firmware for the Multiplexer Modules to properly identify.

Note This discussion applies to SCPI programming. See Appendix B

(“16-Channel Relay Multiplexer Registers”) for details on multiplexer modules registers.

Selecting Channels To address specific channels within a multiplexer module in a switchbox or

scanning voltmeter configuration, you must:

• send the appropriate SCPI command string to the switchbox or

scanning voltmeter (e.g.,

CLOSe, OPEN, etc.)

Multiplexer Card

Numbers

• specify the card number

• specify the channel number

The card number identifies the module within a switchbox or scanning voltmeter configuration. The switch module with the lowest logical address is always card number 01. The card number with the next successive logical address is 02, and so on. Figure 1-2 illustrates the card number and logical address of a typical single module switchbox.

Figure 1-2. Card Numbers for a Single Module Switchbox

14 Getting Started Chapter 1

Figure 1-3 illustrates the card numbers and logical addresses of a typical multiple module switchbox. Figure 1-4 illustrates the card numbers of a typical multiple module scanning voltmeter.

Figure 1-3. Card Numbers for a Multiple Module Switchbox

The logical addresses noted in Figures 1-2, 1-3, and 1-4 apply to modules installed in an 75000 Series B Mainframe (Model Number E1300/E1301) or in a mainframe with an E1405/E1406 Command Module. See the 75000

Series B Installation and Getting Started Guide or the E1406 Command Module Manual for more information on switchboxes and scanning

voltmeter configurations, and logical addressing. If using the E1300 Mainframe or E1405 Command Module, you MUST have version 06.00 (or greater) firmware for the 16-Channel Multiplexer Modules to properly identify. For uses in other systems or mainframes, see the

appropriate manuals.

Figure 1-4. Card Numbers for a Multiple Module Scanning Voltmeter

Getting Started 15Chapter 1

Multiplexer Channel

Address

For the 16-Channel Multiplexers, the channel address (channel_list) is in the form:



(@ccnn) for a single channel;



(@ccnn,ccnn) for multiple channels;



(@ccnn:ccnn) for sequential channels;



(@ccnn:ccnn,ccnn:ccnn) for groups of sequential channels;



or any combination of the above.

where "cc" is the card number and "nn" is the channel number.

For example, the command string to close channel 02 of card number 1 is:

CLOSe (@0102)

Since "cc" (the card number) must be sent, it becomes part of the channel number. Also, you can ignore leading zeros in the card numbers. Thus, to close channel 02, send "102" instead of "0102". To close the above channel, execute:

CLOSe (@102)

SCPI Command

Format Used in This

Manual

You can send SCPI commands in either a short or long form. A long form example is:

CLOSe (@102)

The same command shown without the lower case letters is the short form. The command then becomes:

CLOS (@102)

Some commands in this manual are shown with brackets ([ ]). These are implied or optional commands that you do not have to execute. For example, the

ROUT command is an implied command and is shown in this manual as:

[ROUT:]CLOS (@102)

Thus, to execute these commands, simply enter:

CLOS (@102)

See Chapter 5 for more explanation about SCPI commands and how to send them.

16 Getting Started Chapter 1

Initial Operation

Use the following program example to verify initial multiplexer operation by closing a channel and querying channel closure. The example first resets the switchbox and then closes channel 02 of a single multiplexer module (card number 1) in the switchbox. The program next queries the channel closure state. A returned "1" shows that the command to close the channel has been sent to the switchbox. A returned "0" shows that the command to close the channel has not been sent to the switchbox.

The computer used in the example is an Series 200/300 computer with BASIC as the program language. The computer interfaces to the mainframe

using the General Purpose Interface Bus (GPIB)

. The GPIB interface select code is 7, the primary address is 09, and the secondary address is 14. Refer to the 75000 Series B Installation and Getting Started Guide for addressing information.

Example: Reset the switchbox and close channel 02

10 OUTPUT 70914;"*RST" 20 OUTPUT 70914;"CLOS (@102)" 30 OUTPUT 70914;"CLOS? (@102)" 40 ENTER 70914;Value 50 PRINT Value 60 END

Opens all channels. Close channel 02. Query channel 02 state. Enter results into Value. Display result.

1. GPIB is Agilent Technologies’ implementation of IEEE-488.2

Getting Started 17Chapter 1

Notes:

18 Getting Started Chapter 1

Chapter 2

Configuring the Relay Multiplexer Modules

This chapter shows how to connect external wiring to the 16-Channel Relay Multiplexer Modules, and how to configure them:

• Warnings and Cautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19

• Connecting Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

• Wiring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

• Connecting the Analog Bus . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

• Setting the Card ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23

• Setting the Logical Address Switch . . . . . . . . . . . . . . . . . . . Page 23

• Using the Multiplexer Module with an Agilent Mainframe or

Command Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

• Selecting the Interrupt Priority . . . . . . . . . . . . . . . . . . . . . . . Page 26

• 5 Volt Excitation for Strain Gages . . . . . . . . . . . . . . . . . . . . Page 27

• Adding Signal Conditioning Components/Current Shunts. . Page 27

• Connecting User Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

Warnings and Cautions

WARNING SHOCK HAZARD. Only service-trained personnel who are aware of

the hazards involved should install, remove, or configure the modules. Before installing any module, disconnect AC power from the mainframe and from user wiring.

To prevent electrical shock, all wires to the channel connections must be insulated to at least 120 Vrms (170 V peak).

Caution MAXIMUM VOLTAGE/CURRENT. Maximum voltage that may be

applied between High (H), Low (L), and Guard (G) terminals is 170 V dc or 120 V rms (170 V peak) for the E1345A/47A or 250 V dc or AC RMS (354 V peak) for the E1343A/44A. Maximum current is 50mA (non-conductive) per channel.

STATIC ELECTRICITY. Static electricity is a major cause of

component failure. To prevent damage to the electrical components in the multiplexer module, observe anti-static techniques whenever removing a module from the mainframe or whenever working on a module.

Configuring the Relay Multiplexer Modules 19Chapter 2

Connecting Field Wiring

Figure 2-1 shows the terminal module for the 16-Channel High Voltage Relay (E1343A), 16-Channel Relay (E1345A), 16-Channel General Purpose Thermocouple High Voltage Relay (E1344A), and 16-Channel Thermocouple Relay Multiplexer Modules (E1347A). Use the following guidelines for wire connections.

Wiring Guidelines • If possible, use shielded cables with the shields connected to the Guard

(G) terminals and to the low connection near the measurement point.

• Be sure the wires make good connections on the screw terminals.

• For thermocouples, connect the Guard terminal to the thermocouple's

shield lead and the low connection near the measurement point.

Figure 2-1. Multiplexer Modules Connector Blocks

20 Configuring the Relay Multiplexer Modules Chapter 2

Wiring a Terminal Module

Configuring the Relay Multiplexer Modules 21Chapter 2

Connecting the Analog Bus

Figure 2-2 shows how to connect the analog bus between multiple multiplexer modules and to the E1326 Multimeter. Use the cables shipped with the multiplexer modules to connect the analog bus of the multiplexer modules. Use the cable shipped with the E1326 Multimeter to connect the analog bus of the multiplexer module to the Multimeter input.

These cables are needed to connect the MUX when mounted in the E1403 Module Carrier to the E1411A/B DMM in a C-size cardcage. They must be ordered separately.

1. Connecting E1411 to RELAY MUXs: use E1326-61611 (long analog bus cable).

2. Connecting RELAY to RELAY or RELAY to FET MUX: use E1400-61605.

Figure 2-2. Analog Bus Connections Between Multiplexer/Multimeter Modules

22 Configuring the Relay Multiplexer Modules Chapter 2

Setting the Card ID

The Card ID Jumpers indicate which terminal assembly is used. Since the E1343-66201 and E1345-66201 assembly is used with a variety of terminal modules, the ID jumpers may be changed. To reduce setup time and avoid configuration errors, check the jumpers to make sure they match the terminal module used.

When the relay multiplexers are shipped from the factory, the Card ID Jumpers are set according to the terminal module (E1343/44/45/47/55/56) shipped with them. The system is able to identify the multiplexer with or without the terminal module attached.

Note If the jumper setting does not match the terminal module attached, the

system will identify the card based on the jumper setting.

Setting the Logical Address Switch

The address switch (LADDR) factory setting is 112. You may have changed the setting during module installation. Valid address values are from 0 to

255. Refer to the 75000 Series B System Installation and Getting Started Guide or the E1406 Command Module Manual for addressing information. Otherwise, to change the setting, refer to the Figure 2-3.

Figure 2-3. Locate and Set the Logical Address Switch

Configuring the Relay Multiplexer Modules 23Chapter 2

Using the Multiplexer Module with an Agilent Mainframe or Command Module

To program the multiplexer modules with an E1300A/01A Mainframe or an 1405B/E1406A Command Module, the modules must be configured as an instrument. If using the E1300 Mainframe or E1405 Command Module,

you MUST have version 06.00 (or greater) firmware for the 16-Channel Multiplexer Modules to properly identify. An instrument configuration

for the multiplexer modules must be a:

• Scanning Voltmeter - Used with an E1326B/E1411A Multimeter.

• Switchbox - Used with other switch type modules, like other

multiplexer modules, etc.

(The above requirements are not necessary if using register-based programming to program the modules.)

Using the Scanning

Voltmeter

Configuration

Use this configuration for:

1. Easiest system programming.

2. Fastest execution speed.

3. Thermocouple measurements if using the E1326B/E1411B temperature function.

To use this configuration, set the multimeter's logical address to a multiple of 8. Also set the first multiplexer module's logical address to the next address value, the second module to the next address value, and so on. The following shows the logical address settings of a Scanning Voltmeter with the multimeter address set to 24.

Logical Address Module Channels

24 E1326B/E1411A N/A

25 E1345A/E1347A 100-115

26 E1345A/E1347A 200-215

To program the scanning voltmeter, use the programming information in the appropriate multimeter manual.

24 Configuring the Relay Multiplexer Modules Chapter 2

Using the

Use this configuration when:

Switchbox

Configuration

Verifying Correct

Logical Address

Settings

1. Simultaneously closing multiple channels on multiple modules.

2. Other multimeters/modules cannot control the multiplexer modules.

To use this configuration, set the first multiplexer module's logical address to a multiple of 8. Set the next multiplexer module's logical address to the next address value, the third module to the next address value, and so on. The following shows the logical address settings of a switchbox with the first multiplexer module address set to 112.

Logical Address Module Channels

112 E1345A/E1347A 100-115

113 E1345A/E1347A 200-215

114 E1345A/E1347A 300-315

To program the switchbox, use the programming information in this manual.

To verify that the modules have the correct logical address setting, query the E1300A/E1301A Mainframe or E1405B/E1406A Command Module as follows:

E1301A Mainframe - From the “Select a Instrument” prompt of the front panel, select the following menus:

SYSTEM CONFIG? LADDS

E1300A Mainframe, E1405B, or E1406A Command Module with an RS-232 Terminal - From the “Select an Instrument” prompt, select the

following menus:

SYSTEM CONFIG? LADDS

If no front panel or RS-232 terminal is available, send the following SCPI query command to the mainframe/command module:

VXI:CONF:DLAD?

The returning string contains all logical addresses in the system.

Configuring the Relay Multiplexer Modules 25Chapter 2

Selecting the Interrupt Priority

The multiplexer modules generate interrupts after a channel relay closing or opening completes. These interrupts set the selected line on the VXI peripheral interrupt bus true.

The VXI peripheral interrupt bus consists of 7 interrupt priority lines that carry the interrupt signal to the commander. Line 1 has the highest priority and line 7 the lowest. The multiplexer module's default setting is line 1, since it is the most commonly used interrupt line.

The E1300A/E1301A Mainframe default operation is to monitor all seven interrupt lines. The E1405B/E1406A Command Module's default operation is to manage only one line. The Command Module does, however, use an interrupt line allocation table that allows you to select which lines the command module is to monitor. For embedded controllers, refer to the appropriate controller documentation to determine which of the line(s) the controller monitors.

When using an E1300A/E1301A Mainframe or E1405B/E1406A Command Module for register-based programming (instead of the SCPI driver) and where the program generates an interrupt, be sure to use the multiplexer module's interrupt line that does not interfere with the program. Use the line that is not used by the SCPI driver to generate interrupts.

Refer to Figure 2-4 to change the interrupt priority. Unsolder and remove two jumpers from the old priority location. Install the jumpers in the new priority location (Figure 2-4 shows a priority change from 1 to 7).

Figure 2-4. Changing the Priority Interrupt Level Jumpers

26 Configuring the Relay Multiplexer Modules Chapter 2

5 Volt Excitation for Strain Gages

The E1345-66201 is used with a variety of terminal modules including the E1355A and E1356A Strain Gage Multiplexers. When used with these strain gages, the jumpers JM1 and JM2 may be installed to provide 5 volt excitation to the strain gage bridge. This voltage is fused at 4A. Channel x93 is used to sense it.

Jumpers JM1 and JM2 must be removed when used with the E1347A Thermocouple terminal module. This must be done because the connector pins in this case are used to sense the 5k Ohm thermistor on the terminal module.

When the relay multiplexer is shipped from the factory, the jumpers are not installed.

Adding Signal Conditioning Components/Current Shunts

The multiplexer module's terminal module allows you to add components on each channel for:

-- Low-Pass Filters

-- Attenuators

-- Current Shunts (for current measurements using a voltmeter)

Figure 2-5 shows how to install the appropriate components for the above configurations. In the figure, channel 12 shows a low pass filter configuration, channel 07 an attenuator configuration, and channel 04 a current shunt configuration.

Configuring the Relay Multiplexer Modules 27Chapter 2

Figure 2-5. Signal Conditioning Components/Current Shunts

28 Configuring the Relay Multiplexer Modules Chapter 2

Connecting User Inputs

The relay switch modules consist of a relay component module and a connector (terminal) block. If you choose not to use the supplied connector block, Figure 2-6 shows the front panel for the modules and the connection diagram for wiring your own terminal connector.

Figure 2-6. Relay Multiplexer Modules Front Panel and Connector Pinout

Configuring the Relay Multiplexer Modules 29Chapter 2

Notes:

30 Configuring the Relay Multiplexer Modules Chapter 2

Using the Relay Multiplexer Modules

Using This Chapter

This chapter uses typical examples to show how to use the 16-Channel Relay and 16-Channel Thermocouple Relay Multiplexer Modules. Refer to Chapter 4 (“Understanding the Relay Multiplexer Modules”) for more information. This chapter contains the following sections:

• Multiplexer Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

• Connecting Switchbox Channels to Common . . . . . . . . . . . Page 32

• Connecting Switchbox Channels to Tree Terminals for

• Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . Page 36

• Measuring Temperature Using Thermocouples

Multiplexer Commands

Chapter 3

Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34

(E1344A and E1347A Module only) . . . . . . . . . . . . . . . . Page 39

Table 3-1. Multiplexer Commands in Chapter 3

Command Description

ARM:COUN <number> Selects multiple scanning cycles.

INIT[:IMM] Starts scanning process; use the [ROUT:]SCAN command

to select channels for scanning.

INIT:CONT 1| 0|ON|OFF Enables/disables continuous scanning cycles.

[ROUT:]CLOS <channel_list> Closes all channels in channel list.

[ROUT:]CLOS? <channel_list> Queries mainframe for channel closure.

[ROUT:]OPEN <channel_list> Opens all channels in channel list.

[ROUT:]SCAN <channel_list> Closes all channels in channel list one at a time; previous

channel opens before next channel closes.

[ROUT:]SCAN:MODE FRES Automatically closes paired channel relays (e.g., channels

01 and 09) during 4-wire ohms measurements and scanning.

[ROUT:]SCAN:PORT ABUS Automatically closes the tree switches while scanning.

NOTE: The commands with brackets ([ ]) are implied and are not shown in this chapter

Using the Relay Multiplexer Modules 31Chapter 3

Connecting Switchbox Channels to Common

• Closing any channel in Bank 0 (i.e., channels 00 to 07) connects the

channel to the Bank 0 Common.

• Closing any channel in Bank 1 (i.e., channels 08 to 15) connects the

channel to the Bank 1 Common.

Example: Connect

Channels 02 and 09 to

Common

Figure 3-1 shows how to connect channels 02 and 09 of a single module switchbox to their respective Common Terminals. Execute:

CLOS (@102,109)

102 closes channel 02 and 109 closes channel 09; the first number (1) is the card number.

Figure 3-1. Connecting Channels 02 and 09 to their Respective Commons

32 Using the Relay Multiplexer Modules Chapter 3

Comments Opening Channels. Use the OPEN <channel_list> command to open

channels. For example, to open channels 02 and 09, execute:

OPEN (@102,109)

Closing/Opening Multiple Channels. To close or open multiple channels, place a comma (,) between the channel numbers. To close or open a range of channels, place a colon (:) between the channel numbers. You can do this for both single or multiple module switchboxes. For example, to close:

-- channels 02 and 04 of a card #1 module, and

-- channels 07 through 10 of a card #1 module, and

-- channels 09 and 15 of a card #2 module

execute this command:

CLOS (@102,104,107:110,209,215)

Closing/Opening Order for Multiple Channels. Closing/opening order for multiple channels with a single command is not guaranteed.

Query Open/Closed Channels. The

OPEN? <channel_list> commands determine if the channel in the channel

CLOS? <channel_list> and

list is open or closed, respectively. (The query command does not determine if, in the event of a hardware failure, the channel remains open/closed.) For example, to determine if the channels in the above example are closed, execute:

CLOS? (@102,104,107:110,209,215)

and enter the response into a string variable. The returned response should look like: "1,1,1,1,1,1,1,1".

A response of 1 indicates that the channel is closed; a response of 0 indicates that the channel is open. The reverse is true for the

OPEN? <channel_list> command. The correct responses for both the OPEN? and CLOS? commands are:

CLOS? 1 = Closed

0 = Open

OPEN? 1 = Open

0 = Closed

Note You must read the query response after sending a query command or the

switchbox will generate an error.

Using the Relay Multiplexer Modules 33Chapter 3

Connecting Switchbox Channels to Tree Terminals for Making Measurements

• Closing the AT Tree Switch connects any channel in Bank 0 (i.e.,

channels 00 to 07) to the AT Tree Switch Terminals and to the H, L, and G terminals of the Analog Bus connector.

• Closing the BT Tree Switch connects any channel in Bank 1 (i.e.,

channels 08 to 15) to the BT Tree Switch Terminals and to the I+, I-, and IG terminals of the Analog Bus connector.

• Use the Tree Switch Terminals to connect measuring devices like the

E1326 Digital Multimeter.

Example: Connect

Channels 02 and 09 to

Tree Terminals for

Voltage or 2-Wire Ohms

Measurements

Figure 3-2 shows how to connect channels 02 and 09 of a single module switchbox to the AT Tree Switch Terminals and the Analog Bus connector for voltage or 2-wire ohms measurements. Execute:

CLOS (@102,190,192)

OPEN (@102) CLOS (@109)

102 closes channel 02, 190 closes the AT tree switch, 192 closes the AT2 tree switch. Opens channel 02. 109 closes channel 09.

Figure 3-2. Closing Channels 02 and 09 for a Voltage Measurement

34 Using the Relay Multiplexer Modules Chapter 3

Example: Connect

Channels 02 and 10 to

Tree Terminals for 4-Wire

Ohms Measurements

Figure 3-3 shows how to connect channels 02 and 10 of a single module switchbox to their respective Tree Switch Terminals and the Analog Bus connector for 4-wire ohms measurements. Execute:

CLOS (@102,110,190,191)

102 closes channel 02, 110 closes channel 10, 190 closes the AT tree switch, and 191 closes the BT tree switch.

Figure 3-3. Closing Channels 02 and 10 for a 4-Wire Ohms Measurement

Comments Opening the AT, BT, and AT2 Tree Switches. Use the

OPEN <channel_list> command to open the tree switches.

For example, to open the AT, BT, and AT2 Tree Switches, execute:

OPEN (@190,191,192)

Measuring with the E1326/E1411 Multimeters. The E1326/ E1411 Multimeters can directly measure channels of single or multiple multiplexer modules in a scanning voltmeter configuration. The multimeters, when correctly programmed, automatically close the appropriate AT, BT, and AT2 Tree Switches. For more information, see the E1326/E1411 User's Manual.

Using the Relay Multiplexer Modules 35Chapter 3

Scanning a Range of Switchbox Channels

• You can scan a range of channels of a switchbox consisting of single

or multiple multiplexer modules (see the “Comments” section for scanning requirements of a switchbox).

• Scanning involves sequentially closing each channel on a range of

specified channels.

• During scanning, the relay which was previously closed opens before

the next relay closes.

Example: Making Voltage

Measurements by

Scanning

Figures 3-4, 3-5, and the following commands, show how to make voltage measurements by performing a single scanning cycle of all channels on two multiplexer modules in a single switchbox. In the example, the:

-- AT Tree Switch Terminals of each terminal module connect to each other and to the multimeter in Figure 3-5; to connect the AT Tree Switch Terminals to each other, use either the Analog Bus Cables; Analog Bus (shown in Figure 2-2) or wire the terminals together between each terminal modules.

-- E1300/E1301 Mainframe's "Trig Out" pulse synchronizes the switchbox with the multimeter.

-- GPIB Bus trigger command advances the switchbox channel list.

-- Multimeter GPIB select code is 7 and primary address is 22.

-- Switchbox GPIB select code is 7, the GPIB primary address is 09, and the GPIB secondary address is 14.

-- Computer is an HP Series 200/300 Computer with BASIC using GPIB.

Enter and Execute:

10 OUTPUT 722;"TRIG EXT;DC 10"

20 OUTPUT 70914;"OUTP ON" 30 OUTPUT 70914;"TRIG:SOUR BUS"

40 OUTPUT 70914;"SCAN:MODE VOLT"

50 OUTPUT 70914;"SCAN:PORT ABUS"

60 OUTPUT 70914;"SCAN (@100:215)"

70 OUTPUT 70914;"INIT" 80 FOR I=1 TO 32 90 ENTER 722;A 100 PRINT A 110 TRIGGER 70914

120 NEXT I 130 END

!Sets multimeter to external triggers and to measure dc volts. !Enables "Trig Out" port. !Sets switchbox to receive Bus triggers. !Setup switchbox to measure voltage. !Closes the appropriate Tree Switches while scanning; automatically makes connection to the Analog Bus. !Selects channel list. 100 selects first channel of module #1; 215 selects last channel of module #2. !Starts scanning cycle. !Start count loop. !Enter reading into variable A. !Print reading in variable A. !Trigger the switchbox to advance the scan list. !Increment count.

36 Using the Relay Multiplexer Modules Chapter 3

Figure 3-4. Scanning Channels 100 to 215 of a Two Module Switchbox

Figure 3-5. Mainframe to Multimeter Connection for Synchronization

Using the Relay Multiplexer Modules 37Chapter 3

Example: Making 2-Wire Ohms Measurements by

Scanning

Use the same setup shown in the first program example in this section, except change the commands in lines 10 and 40 to the following:

10 OUTPUT 722;"TRIG EXT;OHM" 40 OUTPUT 70914;"SCAN:MODE RES"

!Set multimeter to 2-wire ohms. !Closes channel switches.

This command, when used with SCAN:PORT ABUS and

SCAN <channel_list> commands, automatically closes the channels defined

in the channel list, and the AT and AT2 Tree Switches during scanning.

Example: Making 4-Wire Ohms Measurements by

Scanning

Example: Making

Multiple Scans

Example: Making

Continuous Scans

Use the SCAN:MODE FRES command to automatically close the selected channels defined in the

SCAN <channel_list> command. This type of

measurement requires paired channel closure (e.g., channels 02 and 10), which the command automatically performs. Change the commands in lines 10 and 40 to the following:

10 OUTPUT 722;"TRIG EXT;OHM" 40 OUTPUT 70914;"SCAN:MODE FRES"

!Set multimeter to 4-wire ohms. !Closes channel switches.

This command, when used with the SCAN:PORT ABUS and

SCAN <channel_list> commands, automatically closes the channels defined

in the channel list and the AT and BT Tree Switches during scanning.

The ARM:COUN <number> command selects multiple scanning cycles. Add the command to the first program example in this section, as follows:

OUTPUT 70914;"ARM:COUN 10" OUTPUT 70914;"SCAN (@100:215)"

!Enables 10 scanning cycles. !Sets scan list.

The INIT:CONT ON command selects continuous scanning cycles (

INIT:CONT OFF disables continuous scanning cycles). Add the command

to the first program example in this section, as follows:

OUTPUT 70914;"INIT:CONT ON"

OUTPUT 70914;"SCAN (@100:215)"

!Enables continuous scanning cycles. !Sets scan list.

Comments See Chapter 4 for more information on scanning.

Scanning Requirements of a Switchbox (in an Mainframe with an Command Module). To scan modules in a switchbox, you must:

-- know the card numbers (see Chapter 1) of all the modules to be scanned;

-- sequentially address the modules (e.g., Logical Address 112, 113, 114, etc.);

-- set lowest addressed module to a logical address that is a multiple of 8 (see the 75000 Series B Installation and Getting Started Guide, or other appropriate manuals, for more information).

38 Using the Relay Multiplexer Modules Chapter 3

Measuring Temperature Using Thermocouples (E1344A/47A Modules Only)

• Closing the AT and AT2 Tree Switches allows a multimeter connected

to the AT Tree Switch Terminals to measure the voltage of a thermocouple or resistance of a thermistor connected to any channel.

• Closing the RT and AT2 Tree Switches allows a multimeter connected

to the AT Tree Switch Terminals to measure the resistance of the thermistor on the terminal module.

• Use the thermistor resistance to calculate the temperature of the

terminal module to compensate thermocouple temperature measurements (see “Comments” later in this section).

Example: Setup for

Measuring

Thermocouple

Temperature Using an

External Multimeter

Figure 3-6 and the following commands show how to set up channel 01 of a single module switchbox to measure temperature of a thermocouple using an external multimeter. Execute:

CLOS (@192,193)

measure thermistor temperature OPEN (@193) CLOS (@101,190)

measure thermocouple voltage; calculate compensated thermocouple voltage Use multimeter.

192 and 193 close the AT2 and RT tree switches. Use multimeter. Opens the RT Tree Switch. Closes channel 01 and the AT tree switch.

Figure 3-6. Temperature Measurement on Channel 01 Using a Thermocouple

Using the Relay Multiplexer Modules 39Chapter 3

Comments Temperature Measurements using Thermistors. This consists of 2-wire

or 4-wire Ohms measurements. See “Connecting Switchbox Channels to Tree Terminals for Making Measurements” on page 34 for making those measurements.

Measuring Temperature with the E1326/E1411 Multimeters. The E1326/E1411 Multimeters can directly measure channels of single or multiple multiplexer modules. The multimeter automatically calculates the correct temperature for the specific thermistor or thermocouple type used. For more information, see the E1326/E1411 Multimeter User's Manual.

Thermocouple Compensation using the Thermistor on the E1344A/47A Terminal Module. The temperature inside the terminal

module can affect the temperature reading taken from a thermocouple. Use the thermistor inside the terminal module to determine the temperature inside the terminal module to compensate the thermocouple temperature measurements. Do the following:

1. Measure the resistance of the thermistor on the terminal module. Compute the temperature of the terminal module from the reading (T

ref

2. For values of resistance between 92.7 to 3.685e6, use the following equations to calculate the temperature of the terminal module: T

= temperature in degrees C.

ref

Thermos = the resistance of channel x93, the 5K ohm thermistor. A = 1.28463e-3 B = .23625e-3 C = 9.2697e-8 W = LOG (Thermos) T

= 1./(A+W*(B +C*W*W))-273.15

ref

3. Measure the voltage on the thermocouple connected to a channel (V

4. Convert the thermistor temperature (T (V

). Use the temperature to voltage characteristics of the

ref

) to the thermocouple voltage

ref

thermocouple measured in step 2 (different thermocouples have different temperature-to-voltage characteristics).

5. Compute the compensated voltage (V) by the formula: V = (V

ref



6. Convert the compensated voltage (V) calculated in step 4 to temperature. This is the actual temperature measured by the thermocouple.

40 Using the Relay Multiplexer Modules Chapter 3

Understanding the Relay Multiplexer

Using This Chapter

This chapter explains techniques to scan the channels of 16-Channel Relay and 16-Channel Thermocouple Relay Multiplexer Modules.

• Commands for Scanning Switchbox Channels. . . . . . . . . . . Page 41

• Using Scanning Trigger Sources. . . . . . . . . . . . . . . . . . . . . . Page 41

• Using the Scan Complete Bit . . . . . . . . . . . . . . . . . . . . . . . . Page 46

Commands for Scanning Switchbox Channels

Scanning multiplexer channels consists of closing a set of channels, one at a time. Available for the multiplexers are single, multiple (2 to 32767), or continuous scanning modes. See Figure 4-1 for the different commands used in scanning.

Chapter 4

Modules

Using Scanning Trigger Sources

The TRIG:SOUR command specifies the source to advance the channel list.

Scanning with

External

Instruments

Use the

BUS

Mainframe "Trig Out" port, use the different trigger sources. The sources are used in other VXIbus mainframes with command modules that have "Trig Out" ports.

The examples on the following pages show different ways to scan channels of a switchbox in an E1300/E1301 Mainframe. The operation is similar to other VXIbus mainframes with command modules that have "Trig Out" and "Event In" ports.

The computer used in the examples is an HP Series 200/300 used with BASIC as the program language. The computer interfaces with the mainframe over GPIB. Assumed is an:

TRIG command to advance the channel list while in the TRIG:SOUR

or TRIG:SOUR HOLD trigger state. To enable the E1300/E1301

-- GPIB select code of 7;

-- GPIB primary address of 09 for the E1300/E1301 Mainframe;

-- GPIB primary address of 22 for the 3457A Multimeter;

-- GPIB secondary address of 14 for the multiplexer module.

OUTP command. Figure 4-2 shows the

Understanding the Relay Multiplexer Modules 41Chapter 4

Figure 4-1. Scanning Commands

42 Understanding the Relay Multiplexer Modules Chapter 4

Figure 4-2. Trigger Sources for Scanning

Understanding the Relay Multiplexer Modules 43Chapter 4

Example: Scanning With

External Devices

This example uses the mainframe "Trig Out" port to synchronize the multiplexers to an Agilent 3457A Digital Multimeter. See the following figure for typical connections. For this example, use the trigger output pulse of the mainframe "Trig Out" port to trigger the multimeter via its External Trigger port. The sequence of operation is:

INIT (line 70) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is sent to the computer (lines 80 to 100).

TRIGGER (line 110) advances the channel list to the next channel.

6. Steps 2-5 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT;DCV"

20 OUTPUT 70914;"OUTP ON" 30 OUTPUT 70914;"TRIG:SOUR BUS"

40 OUTPUT 70914;"SCAN:MODE VOLT"

50 OUTPUT 70914;"SCAN:PORT ABUS"

60 OUTPUT 70914;"SCAN (@100:115)"

70 OUTPUT 70914;"INIT" 80 FOR I=1 TO 16 90 ENTER 722;A 100 PRINT A 110 TRIGGER 70914

120 NEXT I 130 END

!Sets multimeter to external trigger and to measure dc volts. !Enables "Trig Out" port. !Sets switchbox to receive Bus triggers. !Sets switchbox to measure voltage. !Closes the AT and AT2 Tree Switches. !Selects the channel list for scanning. !Starts scanning cycle. !Start count loop. !Enter reading into variable A. !Print reading in variable A. !Trigger the switchbox to advance the channel list. !Increment count.

44 Understanding the Relay Multiplexer Modules Chapter 4

Example: Scanning

Using "Trig Out" and

"Event In" Ports

This example uses the mainframe "Trig Out" and "Event In" ports to synchronize the multiplexers to an Agilent 3457A Digital Multimeter. See the following figure for typical connections. For this example, use the trigger output pulse of the mainframe "Trig Out" port to trigger the multimeter via its "EXTERNAL TRIGGER" port. Note that the pulse output from the multimeter's "VOLTMETER COMPLETE" port triggers the switchbox to advance the channel list. Use the multimeter's reading storage capability to store readings.

The sequence of operation is:

INIT (line 50) closes channel number 100.

2. The channel closure causes a trigger output from the "Trig Out" port.

3. The trigger causes the multimeter to make a measurement.

4. Measurement result is stored into multimeter memory.

5. Trigger is output from multimeter's "VOLTMETER COMPLETE" port.

6. Trigger to "Event In" port advances the channel list to the next channel.

7. Steps 2-6 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT;DCV;MEM FIFO"

!Sets multimeter to external trigger; to measure dc volts, and store readings.

20 OUTPUT 70914;"OUTP ON" 30 OUTPUT 70914;"TRIG:SOUR EXT"

40 OUTPUT 70914;"SCAN (@100:115)"

50 OUTPUT 70914;"INIT" 60 END

!Enables "Trig Out" port. !Sets switchbox to receive external triggers. !Selects the channel list (channels 100 to 115). !Starts scanning cycle.

Understanding the Relay Multiplexer Modules 45Chapter 4

Using the Scan Complete Bit

You can use the Scan Complete Bit (bit 8) in the Operation Status Register of a switchbox to determine when a scanning cycle completes (no other bits in the register apply to the switchbox). Bit 8 has a decimal value of 256 and you can read it directly with the

STATus:OPERation[:EVENt]? command in Chapter 5 for an example).

STAT:OPER? command (refer to the

Example: Scan Complete

Interrupt

When enabled by the

STAT:OPER:ENAB 256 command, the Scan

Complete Bit will be reported as bit 7 of the Status Register. Use the GPIB Serial Poll or the IEEE 488.2 Common Command Register. When bit 7 of the Status Register is enabled by the

*STB? to read the Status

*SRE 128

Common Command to assert a GPIB Service Request (SRQ), you can interrupt the controller when the Scan Complete Bit is set, after a scanning cycle completes. This allows the controller to do other operations while the scanning cycle is in progress.

The following example monitors bit 7 in the Status Register to determine when the scanning cycle completes. The computer used in the example is an HP Series 200/300 used with BASIC as the program language. The computer interfaces with the mainframe over GPIB. The GPIB select code is 7, the GPIB primary address is 09, and the GPIB secondary address is 14.

10 OUTPUT 70914;"*CLS"

20 OUTPUT 70914;"STAT:OPER:ENAB 256"

30 OUTPUT 70914;"*SRE 128"

40 OUTPUT 70914;"TRIG:SOUR EXT" 50 OUTPUT 70914;"SCAN (@100:115)" 60 OUTPUT 70914;"INIT" 70 WHILE NOT BIT(SPOLL(70914),7) 80 PRINT "DO OTHER OPERATION HERE"

90 END WHILE 100 PRINT "INTERRUPT GENERATED"

110 END

!Clear all switchbox status structure.

!Enable Scan Complete Bit to set bit 7 in Status Register. !Enable bit 7 of Status Register to assert SRQ. !Set to external trigger mode. !Select channels to be scanned. !Start scanning cycle. !Waiting for scan complete. !Enter program lines for computer to do other operations.

!Program goes to this line after interrupt is generated by a completed scanning cycle.

46 Understanding the Relay Multiplexer Modules Chapter 4

Relay Multiplexer Command Reference

Using This Chapter

This chapter describes Standard Commands for Programmable Instruments (SCPI) and summarizes IEEE 488.2 Common (*) Commands applicable to all four 16-Channel Relay Multiplexer Modules.

• Command Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 47

• SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 49

• IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 71

• Command Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 72

Command Types

Commands are separated into two types : IEEE 488.2 Common Commands and SCPI Commands.

Chapter 5

Common

Command

Format

SCPI

Command

Format

The IEEE 488.2 standard defines the Common Commands that perform functions like reset, self-test, status byte query, etc. Common Commands are four or five characters in length, always be gin with the asterisk character (*), and may include one or more parameters. The command keyword is separated from the first parameter by a spa ce character. Some e xam pl es of Com mon Com mands are shown below:

*RST *ESR 32 *STB?

SCPI commands perform functions like closing switches, making measurements, 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:]

parameters, and

is the root command, CLOSe and SCAN are se cond level co mmands with

:MODE? is a third level command.

Relay Multiplexer Command Reference 47

Command

Separator

A colon (:) always separates one command from the next lower level command as shown below:

ROUTe:SCAN:MODE?

Colons separate the root command from the sec ond level command (ROUTe:SCAN) and the second level from the third level (

SCAN:MODE?).

Abbreviated

Commands

Implied

Commands

The command syntax shows most commands as a mixture of upper and lower case letters. The upper case letters indicate the abbreviated spelling for the command. For shorter program lines, s end 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 are both acceptable forms. Other forms of

MEASure, then MEAS and MEASURE

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 commands are those which appear in square brackets ([]) in the command syntax. (Note that 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 thi s case, t he instr ument ass umes you int end to use the implied command and it responds as if you had sent it. Examine the

SOURce

subsystem shown below:

[SOURce:]

PULSe

:COUNt < :COUNt? [<MIN|MAX>] :PERiod < :PERiod? [<MIN|MAX>]

count>

period>

The root command [SOURce:] is an implied command. To set the instrument's pulse count to 25, you can send either of the following command statements:

SOUR:PULS:COUN 25 or PULS:COUN 25

48 Relay Multiplexer Command Reference

Parameters Parameter Types. The following table contains explanations and examples of

parameter types you might see later in this chapter.

Parameter

Type Explanations and Examples

Numeric A ccept s al l commonl y used de ci mal repre sent ation s of nu mbers

including optional signs, decimal points, and scientific notation. 123, 123E2, -123, -1 .23E2, .123, 1 .23E-2, 1.2300 0E-01. Special

cases include MIN, MAX, and INF.

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.

Linking

Commands

An example is the TRIGger:SOURce < where source can be BUS, EXT, HOLD, or IMM.

source> command

Optional Parameters. Parameters shown within square brackets ([]) are optional parameters. (Note that 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? [<MIN|MAX>]

specifying a parameter, the present

MIN parameter, the command returns the minimum co unt avai la bl e. If you send the MAX paramete r, the command returns the maximum count available. Be sure to

command. If you send the command without

ARM:COUNt value is returned. If you send the

place a space between 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 bo th a semicolon and a colon between th e commands. For example:

ARM COUN 1;:TRIG:SOUR EXT

SCPI Command Reference

This section describes the Standard Commands for Programmable Instruments (SCPI) commands for t he multip lexer modu les. Comma nds are listed alphabet ically by subsystem and also within each subsystem.

Relay Multiplexer Command Reference 49

The ABORt subsystem stops a scan in progress when the scan is enabled via the interface, and the trigger modes are

TRIGger:SOURce HOLD

Subsystem Syntax ABORt

Comments • ABORt Operation invali dates the cu rrent ch annel list and s et s ARM:COUNt 1

(one scanning cycles per (no continuous scanning cycles), and sets (continuous internal triggering).

• Stopping Scans Enabled from Interface: When a scan is enabled from the

interface, use an interface Instr" or "Cl ear Instr" key to stop the scan.

When the scan is enabled from the interface and the trigger source is

TRIGger:SOURce BUS or TRIGger:S OU Rce HOLD, use ABORt or the

E1301 front panel "Reset Instr" or "Clear Instr" keys to stop the scan.

• S topping Scans Enabl ed from Fr ont Pane l: When a scan is enabled from the

E1301 front panel, execute Instr" or "Clear Instr" keys to stop the scan.

ABORt

TRIGger:SOURce BUS or

INITiate command), sets INITiate CONTinuous OFF

TRIGger:SOURce IMMediate

CLEAR command or the E1301 front panel "Reset

*RST over the interface or the front panel "Reset

• Related Commands: ARM, INITiate:CONTinuous, [ROUTe:]SCAN, TRIGger

Example Stopping a Scan with ABORt

TRIG:SOUR BUS INIT:CONT ON SCAN (@100:115) INIT

• ABOR

Bus is trigger source. Set continuous scanning. Sets channel list. Starts scanning cycle.

Aborts scan in progress.

50 Relay Multiplexer Command Reference

:COUNt

Parameters

ARM

The ARM subsystem selects the number of scanning cycles (1 through 32767) for each

INITiate command.

ARM

:COUNt < :COUNt? [MIN |MAX]

ARM:COUNt <number> MIN|MAX allows scanning cycles to occur a multiple

of times (1 to 32767) with one

INITiate:CONTinuous OFF|0 is set.

Parameter Name Parameter Type Range of Values

number> MIN|MAX

INITiate command and when

number>

numeric 1–32767|MIN|MAX

Comments • Number of Scans: Use only values between 1 to 32767 for the number of

scanning cycles (default is 1).

• Related Commands: ABORt, INITiate[:IMMediate]

• *RST Condition: ARM:COUNt 1

Example Setting Ten Scanning Cycles

ARM:COUN 10 SCAN (@100:115) IINIT

Sets 10 scanning cycles. Sets channel list. Starts scanning cycle.

Relay Multiplexer Command Reference 51

:COUNt?

Parameters

ARM:COUNt? [MIN|MAX] returns curren t number of scanni ng cycl es set by

ARM:COUNt. A value is supplied if no MIN or MAX parameter is sent . With MIN or MAX passed as p arameters, MIN returns 1 and MAX returns 32767.

Parameter Name Parameter Type Range of Values

MIN|MAX numeric MIN=1, MAX=32767

Comments

• Related Commands: INITiate[:IMMediate]

Example Query Number of Scanning Cycles

ARM:COUN 10 ARM COUN?

Sets 10 scanning cycles. Query number of scanning cycles; returned value is 10.

52 Relay Multiplexer Command Reference

The DISPlay subsystem monitors the channel state of a selected module (or card) in a switchbox, and only operates with mainframes that have a display, such as the 75000 Series B Mainframe (Model Number E1301).

Subsystem Syntax DISPlay

:MONitor :CARD <

:MONitor:CARD

DISPlay:MONitor:CARD <number|AUTO> selects t he module in a switch box to be

monitored.

Parameters

DISPlay

number |AUTO>

[:STATe] <

Parameter Name Parameter Type Range of Values

mode>

number|AUTO>

numeric 1–99

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 AUTO command to select the last module addressed

by a switching command (e.g.,

[ROUTe:]CLOSe).

• *RST Condition: DISPlay:MONitor:CARD AUTO

Example Select Module #2 in a Switchbox for Monitoring

DISP:MON:CARD 2

Selects module #2 in a switchbox.

Relay Multiplexer Command Reference 53

:MONitor[:STATe]

Parameters

DISPlay:MONitor[:STATe] <mode> turns the monitor mode on or off.

Parameter Name Parameter Type Range of Values

mode>

boolean 0 |1|ON|OFF

Comments • Monitoring Switchbox Channels: DISPlay:MONitor[:STATe] ON or

DISPlay:MONitor[:STATe] 1

state of the selected module.

DISPlay:MONitor[:STATe] 0 turns the monitor mode OFF.

turns the mo nitor mode ON to show the channel

DISPlay:MONitor[:STATe] OFF or

• Selecting the Module to be Monitored:

Use the module.

DISPlay:MONitor:CARD <number>|AUTO command to select the

• Monitor Mode on an E1301A Mainfr ame Display: The foll owing show s the

monitor mode on the display of an E1301 Mainframe.

SWITCH_112: Chan: 0,1, , , , , , , , ,

The example shows that channels 00 and 01 are closed.

• *RST Condition: DISPlay:MONitor[:STATe] OFF|0

Example Enabling the Monitor Mode

DISP:MON:CARD 2 DISP:MON 1

Selects module #2 in a switchbox. Turns the monitor mode on.

54 Relay Multiplexer Command Reference

The INITiate subsystem selects continuous scanning cycles and starts the scanning cycle.

Subsystem Syntax INITiate

:CONTinuous < :CONTinuous? [:IMMediate]

:CONTinuous

INITiate:CONTinuous <mode> enables or disables co ntinuo us scanni ng cycl es for

the switchbox.

Parameters

INITiate

mode>

Parameter Name Parameter T y pe Range of Values

mode>

boolean 0|1|ON|OFF

Comments • 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 channe l list. Each

trigger from a trigger source selected by the advances the scan through the channel list. A trigger at the end of the channel list closes the first channel in the list and the scan cycle repeats.

TRIGger:SOURce command

• Non-Continuous Scanning Operation: Non-Continuous scanning is enabled

with the Sending the channel list. Each trigger from a trigger source selected by the

TRIGger:SOURce command advances the scan through the channel list. A

trigger at th e end of the channel list opens the last channel in the list and the scanning cycle stops.

INITiate:CONTinuous OFF or INITiate:CONTinuous 0 command.

INITiate[:IMMediate] command closes the first channel in the

• Stopping Continuous Scans: See the ABORt command.

• Related Commands: ABORt, ARM:COUNt, TRIGger, TRIGger:SOURce

• *RST Condition: INITiate:CONTinuous OFF

Example Enabling Continuous Scans

INIT:CONT ON SCAN (@100:115) INIT

Enables continuous scanning. Sets channel list. Starts scanning cycle.

Relay Multiplexer Command Reference 55

:CONTinuous?

Example Query Continuous Scanning State

INITiate:CONTinuous? queries the scanning state. With continuous scanning

enabled, the command returns command re turns

OFF.

ON. With continuous scanning disabled, the

[:IMMediate]

Comments • Starting the Scanning Cycle: The INITiate[:IMMediate] command starts

Example Enabling a Single Scan

INIT:CONT ON INIT:CONT?

INITiate[:IMMediate] starts the scanning cycle and cl os es t he first channel in the

channel list. Successive triggers from the source specified by the command advances the scan through the channel list.

scanning by closing the first channel in the c hannel list . A trigger advance s the scan through the channel list. An invalid channel list generates an error (see the

[ROUTe:]SCAN command).

Enables continuous scanning. Query continuous scanning state.

TRIGger:SOURce

• Stopping Scanning Cycles: See the ABORt command.

SCAN (@100:115) INIT

Sets channel list. Starts scanning cycle.

56 Relay Multiplexer Command Reference

The OUTPut subsystem enables or disables the "Trig Out" port of the E1300/E1301 Mainframe.

Subsystem Syntax OUTPut

[:STATe] < [:STATe]?

[:STATe]

OUTPut[:STATe] <state> enables/disables the "Trig Out" por t on the rea r panel of

the E1300A/E1301A Mainframe.

OUTPut[:STATe] OFF|0 disables the port.

Parameters

Parameter Name Parameter Type Range of Values

OUTPut

state>

OUTPut[:STATe] ON|1 enables the port and

Comments • Enabling "T r ig Out " Port : When enabled, the "Trig Out" is pulsed each time

Example Enabling "Trig Out" Port

[:STATe]?

state>

a channel is closed during scanning. When disabled, the "Trig Out" is not pulsed.

boolean 0|1 |ON|OFF

• Output Pulse: The pulse is a + 5 V negative-going pulse.

• "Trig Out" Port Shared by Switchbo xes: When en abled, th e "T rig Out" may

be pulsed by any switchbox each time a channel is closed in a switchbox during scanning. To disable the output for a specific switchbox, send the

OUTPut[:STATe] OFF or OUTPut[:STATe] 0 command for that switchbox.

• Related Commands: [ROUTE:]SCAN, TRIGger:SOURce

• *RST Condition: OUTPut[:STATe] OFF (port disabled)

OUTP ON

Enables "Trig Out" port for pulse output.

OUTPut[:STATe]? queries the pres ent state of the "Trig Out" port. The co mmand

returns

1 if the port is enabled, or 0 if disabled.

Example Query "Trig Out" Port State

OUTP ON OUTP:STAT?

Enables "Trig Out" port for pulse output. Query port enable state.

Relay Multiplexer Command Reference 57

The [ROUTe:] subsystem controls switching and scanning operations for the multiplexer modules in a switchbox.

Subsystem Syntax [ROUTe:]

CLOSe < CLOSe? < OPEN < OPEN? < SCAN <

[ROUTe:]CLOSe <channel_list> closes multiplexer channels specifie d in the

channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn) , or (@ccnn:ccnn) where cc = card number (00–99) and nn = channel number (00–15).

[ROUTe:]

channel_list>

:MODE NONE|VOLT|RES|FRES :MODE? :PORT ABUS|NONE

Parameters

Parameter Name Parameter Type Range of Values

channel_list>

Comments •Closing Channels: To close:

-- a single channel, use

-- multiple channels, use

-- sequential channels, use

-- a group of sequential channels, use

[ROUTe:]CLOSe (@ ccnn :c cnn,c cn n:ccn n);

-- or any combination. Closure order for multiple channels with a single command is not guaranteed.

[ROUTe:]CLOSe (@ccnn);

[ROUTe:]CLOSe (@ccnn,ccnn);

• Closing the AT, BT, AT2, and RT Tree Switches: Use channel numbers 90,

91, 92, and 93 to close the AT, BT, AT2, and RT Tree Switches, respectively.

• Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOSe?

• *RST Condition: All multiplexer channels are open.

Example Closing Multiplexer Channels

numeric cc00-cc15

[ROUTe:]CLOSe (@ccnn:ccnn);

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.

CLOS (@100,215)

58 Relay Multiplexer Command Reference

100 closes channel 00 of multiplexer #1; 215 closes channel 15 of multiplexer #2.

CLOSe?

Comments •Query is Software Readback: The [ROUTe:]CLOSe? command returns the

[ROUTe:]CLOSe? <channel_list> returns the current state of the channel(s)

queried. The channel_list is in the form (@ccnn). The command returns channel is closed or returns

current sof tware state of the ch annel specified. It does not account for relay hardware failures.

0 if the channel is open.

Example Query Multiplexer Channel Closure

1 if the

OPEN

CLOS (@100,215) CLOS? (@215)

[ROUTe:]OPEN <channel_list> opens the mu ltiplexer channels specified in the

channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn) , or (@ccnn:ccnn) where cc = card number (00–99) and nn = channel number (00–15).

Parameters

Parameter Name Parameter Type Range of Values

channel_list>

Comments •Opening Channels: To open:

-- a single channel, use

-- for multiple channels, use

-- sequential channels, use

-- a group of sequential channels, use

[ROUTe:]OPEN (@ccnn :c cnn,c cnn:c cnn) ;

-- or any combination. Opening order for multiple channels with a single command is not guaranteed.

[ROUTe:]OPEN (@ccnn);

100 closes channel 00 of multiplexer #1; 215 closes channel 15 of multiplexer #2. Query channel 215

numeric cc00–cc15

[ROUTe:]OPEN (@ccnn,ccnn);

[ROUTe:]OPEN (@ccnn:ccnn);

• Opening the AT, BT, AT2, and RT Tree Switches:

Use channel numbers 90, 91, 92, and 93 to open th e AT, BT, AT2, and RT Tree Switches, respectively.

• Related Commands: [ROUTe:]CLOSe, [ROUTe:]OPEN?

• *RST Condition: All multiplexer channels are open.

Example Opening Multiplexer Channels

This example opens channel 00 of a card number 1 multiplexer module and channel 15 of a card number 2 multiplexer module in a single switchbox.

OPEN (@100,215)

100 opens channel 00 of multiplexer #1; 215 opens channel 15 of multiplexer #2.

Relay Multiplexer Command Reference 59

OPEN?

[ROUTe:]OPEN? <channel_list> returns the curr ent state of the cha nnel(s) queried.

The channel_list is in the form (@ccnn). The command returns open or returns

0 if the channel is closed.

1 if the channel is

Comments • Query is Software Readback: The [ROUTe:]OPEN? command returns the

current sof tware state of the ch annel specified. It does not account for relay hardware failures.

Example Query Multiplexer Channel Open State

SCAN

OPEN (@100,215) OPEN? (@215)

[ROUTe:]SCAN <channel_list> defines the channels to be scanned. The

channel_list is in the form (@ccnn), (@ccnn,ccnn), or (@ccnn:ccnn) where cc = card number (00–99) and nn = channel number (00–15).

100 opens channel 00 of multiplexer #1; 215 opens channel 15 of multiplexer #2. Query channel 215.

Parameters

Parameter Name Parameter Type Range of Values

channel_list>

numeric cc00-cc15

Comments • Defining the Channel List: When executing [ROUTe:]SCAN, the channel list

is checked for valid card and channel numbers. An e rror is generated for an invalid channel list.

• Scanning Operation: With a valid channel list, INITiate[:IMMediate] starts the

scanning cycle and closes the first channel in the channel list. Successive triggers from the source specified by through the channel list.

TRIGger:SOURce advances the scan

• Stopping Scan: See the ABORt command.

• Closing the AT, BT, and AT2 Tree Switches:

See the

[ROUTe:]SCAN:PORT ABUS command.

• Related Commands: TRIGger, TRIGger:SOURce

• *RST Condition: All channels open.

Example Scanning Using External Devices

The following example shows how to scan channels using the E1300/E1301 Mainframe via GPIB and an Agilent 3457A Digita l Multimeter. This example uses the mainframe "Trig Out" po rt to synchronize the multi plexer module in a switchbox to the multim eter. The trigger pulse form the port triggers the multim eter for a measurement. See Chapter 3 for typical user connections to the multiplexer.

60 Relay Multiplexer Command Reference

The computer used in the example is an HP Series 200/300 with BASIC as the program language. The computer interfaces with the mainframe over GPIB. Assumed is a GPIB select code of 7, a GPIB primary address of 09 and 22 for the E1300/E1301 Mainframe and Agile nt 3457A Mult imeter , respec tivel y, and a GPIB secondary address of 14 for the switchbox.

SCAN:MODE

10 OUTPUT 722;"TRIG EXT;DCV" 20 OUTPUT 70914;"OUTP ON"

30 OUTPUT 70914;"TRIG:SOUR BUS" 40 OUTPUT 70914;"SCAN:MODE VOLT"

50 OUTPUT 70914;"SCAN:PORT ABUS" 60 OUTPUT 70914;"SCAN (@100:115)"

70 OUTPUT 70914;"INIT" 80 FOR I=1 TO 16 90 ENTER 722;A 100 PRINT A 110 TRIGGER 70914

120 NEXT I 130 END

[ROUTe:]SCAN:MODE <mode> sets the multiplexer channels defined by the

[ROUTe:]SCAN <channel_list> command for None, Volts, 2-wire Ohms, or 4-wire

!Sets multimeter to external trigger and to measure dc volts. !Enables "Trig Out" port. !Sets switchbox to receive Bus triggers. !Sets switchbox to measure voltage during scanning. !Sets switchbox to close the appropriate Tree Switches during scanning. !Selects the channel list. !Starts scanning cycle. !Start count loop. !Enter reading into variable A. !Print reading in variable A. !Trigger the switchbox to advance the channel list. !Increment count.

Ohms measurements.

Parameters

Parameter Name Parameter Type Range of Values

mode>

discrete NONE|VOLT|RES|FRES

Comments • Order of Command Execution: The [ROUTe:]SCAN:MODE command must

be executed before the

[ROUTe:]SCAN <channel_list> command.

• NONE and VOLT Mode Description: Channel list is setup for volts

measurements.

• RES Mode Description: Channel list is setup for 2-wire ohms measurements.

• FRES Mode Description: Channel list is setup for 4-wire ohms

measurements. Use channels only in Bank 0 (channels 00 to 07) when selecting the c hannel s with the

[ROUTe:]SCAN <channel_list> command. Any

channel that closes in Bank 0 automatically closes the paired channel in Bank 1 (e.g., channels 0 2 an d 10). Selecting a chan nel i n Bank 1 (channels 08 to 15) causes an e r ror.

• *RST Condition: ROUT:SCAN:MODE NONE

Relay Multiplexer Command Reference 61

Example S electing the 4-Wire Ohm s Mode

SCAN:MODE?

Example Query Scan Mode

SCAN:PORT

TRIG:SOUR EXT SCAN:MODE FRES SCAN (@100:107) INIT

[ROUTe:]SCAN:MODE? returns the current stat e of the sc an mode. The command

returns or

Since this example selects the returns

SCAN:MODE FRES SCAN:MODE?

[ROUTe:]SCAN:PORT <port> enables/disabl es the closing of the AT, BT, and AT2

tree switches during scanning.

NONE, VOLT, RES, o r FRES if the scan mode is in the NO NE, VOLT, RES,

FRES mode, respectively.

FRES (4-wire ohms) mode, the query command

FRES.

SCAN:PORT ABUS closes the appropriate tree

Selects external trigger source. Selects the 4-wire ohms scanning mode. Sets channel list. Starts scanning cycle.

Selects the 4-wire ohms scanning mode. Query the scanning mode.

switches (for Analog Bus connections). For correct operation, set the measurement modes by the The

[ROUTe:]SCAN:PORT NONE command prevents closing the tree switches.

[ROUTe:]SCAN:MODE command.

Parameters

Parameter Name Parameter Type Range of Values

port>

discrete ABUS|NONE

Comments • Order of Command Execution: The [ROUTe:]SCAN:PORT command must

be executed before the

[ROUTe:]SCAN <channel_list> command.

• *RST Condition: [ROUTe:]SCAN:PORT NONE

Example Selecting the ABUS Port

TRIG:SOUR EXT SCAN:MODE FRES SCAN:PORT ABUS SCAN (@100:107) INIT

Selects external trigger source. Selects the 4-wire ohms scanning mode. Selects the ABUS port. Sets channel list. Starts scanning cycle.

62 Relay Multiplexer Command Reference

The STATus subsystem reports the bit values of the Operation Status Register. Enables the Status Register to set a bit after a bit is set to 1 by the Operation Status Register.

Subsystem Syntax STATus

:OPERation

:OPERation:ENABle

STATus:OPERation:ENABle <number> enables the Operation Status Register to

set a bit in the Status Register. For multiplexer modules, when bit 8 in the Operation Status Register is set to 1, bit 7 in the Status Register is set to 1.

Parameters

Parameter Name Parameter Type Range of Values

:ENABle < [:EVENt]?

STATus

number>

numeric 1–32768

Comments • Setting Bit 7 of the Status Register: STATus:OPERation:ENABle 256 sets bit

7 of the Stat us Regi ster t o 1 after bit 8 of the Operat ion Status Register is set to

• Related Commands: [ROUTe:]SCAN

Example Enable the Status Register

STAT:OPER:ENAB 256

Enables bit 7 of the Status Register.

Relay Multiplexer Command Reference 63

:OPERation[:EVENt]?

STATus:OPERation[:EVENt]? returns the bit value of the Operation Status

Comments • Setting Bit 8 of the Operation Status Register: Bit 8 (Scan Comp lete) is set

to 1 after a sc anning cycle completes. Bit 8 returns to 0 after sending the

ST ATus:OPERation[:EVENt]? command.

• Returned Data after sending the STATus:OPERation[:EVENt]?

Command: The command returns Register is set to 1. The command returns Register is set to 0.

• Related Commands: [ROUTe:]SCAN

Example Reading the Operation Status Register after a Scanning Cycles

+256 if bit 8 of the Operation Status

+0 if bit 8 of the Operation Status

STAT:OPER? read and print the register value

Returns the bit values of the Standard Operation Status Register. +256 shows bit 8 is set to 1; +0 shows bit 8 is set to 0.

64 Relay Multiplexer Command Reference

The SYSTem subsystem returns error numbers/messages in the error queue of a switchbox, and returns module types and descriptions in a switchbox.

Subsystem Syntax SYSTem

:CDEScription? < :CPON < :CTYPe? < :ERRor?

:CDEScription?

SYSTem:CDEScription? <number> returns the description of a selected module

(card) in a switchbox.

Parameters

Parameter Name Parameter Type Range of Values

SYSTem

number>

number|ALL>

number>

numeric 1–99

Comments •16-Channel Relay Multiplexer Module Description: The

SYSTem:CDEScription? <number> command returns:

16 Channel High Voltage Relay Mux for the E1343A; 16 Channel High Voltage Mux with T/C for the E1344A; 16 Channel Relay Mux for the E1345A; and 16 Channel Relay Mux with T/C for the E1347A.

Example Reading the Description of a Card #1 Module

SYST:CDES? 1

Determines the description.

Relay Multiplexer Command Reference 65

:CPON

SYSTem:CPON <number|ALL> opens all channels of a selected or all modules

(cards) in a switchbox.

Parameters

Parameter Name Parameter Type Range of Values

Comments •Differences between *RST and CPON: SYSTem:CPON only opens all

:CTYPe?

Parameters

Comments •16-Channel Relay Multiplexer Module Model Number:

number>

numeric 1–99

channels of a selected or all modules in a switchbox. of all modules in a switchbox and also sets the trigger, etc. modes to the power-on states.

Example Setting a Card #1 Module to its Power-on State

SYST:CPON 1

SYSTem:CTYPe? <number> returns the module (card) type of a selected module

in a switchbox.

Parameter Name Parameter Type Range of Values

number>

The

SYSTem:CTYPe? <number> command returns:

numeric 1–99

Sets module #1 to power-on state.

*RST opens all channels

HEWLETT-PACKARD,E1343A,0,A.01.00 (E1343A) HEWLETT-PACKARD,E1344A,0,A.01.00 (E1344A) HEWLETT-PACKARD,E1345A,0,A.01.00 (E1345A) HEWLETT-PACKARD,E1347A,0,A.01.00 (E1347A)

Note: The 0 after the module number is the serial number of the module (always 0). A.01.00 is an example of the module revision code number.

Example R eading the Model Number of a Card #1 Module

SYST:CTYP? 1

66 Relay Multiplexer Command Reference

Determines the model number.

:ERRor?

Comments • Error Numbers/Messages in the Error Queue: Errors generated by a

SYSTem:ERRor? returns the error numbers and corresponding error messages in

the error queue of a switchbox. See Appendi x C for a list in g of the swit ch box err or numbers and messages.

switchbox store an error number and corresponding error message in the error queue. The error number is a lways a neg ative number. Each error message can be up to 255 characters long.

• Clearing the Error Queue: An error number/message is removed from the

queue each time the first-in, first-out. When the queue is empty, each following command re turns queue, execute

SYSTem:ERRor? command is sent . The err ors ar e cle ared

SYSTem:ERRor?

0, "No error". To clear all error numbers/messages in the

*CLS.

• 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 oldest error numbers/messages remain in the queue and the most recent are lost.

Example Reading the Error Queue

SYST:ERR?

Query the error queue.

Relay Multiplexer Command Reference 67

The TRIGger subsystem commands controls the triggering operation of the multiplexer modules in a switchbox.

Subsystem Syntax TRIGger

[:IMMediate] :SOURce BUS|EXTernal|HOLD|IMMediate :SOURce?

[:IMMediate]

TRIGger[:IMMediate] causes a trigger to occur when the defined trigger source is

TRIGger:SOURce HOLD or TRIGger:SOURce BUS.

Comments • Executing the TRIGger[:IMMediate] Command: A channel list must be

defined with command must be executed before switchbox.

• HOLD or BUS Source Remains: If selected, the TRIGger:SOURce HOLD or

TRIGger:SOURce BUS commands remain in effect after triggering the

switchbox with the

TRIGger

[ROUTe:]SCAN <channel_list> and an INITiate[:IMMediate]

TRIGger[:IMMediate] can trigger the

TRIGger[:IMMediate] command.

• Related Commands: INITiate, [ROUTe:]SCAN

Example Advancing Scan using the TRIGger Command

TRIG:SOUR HOLD SCAN (@100:115) INIT loop statement TRIG increment loop

Sets trigger source to hold. Sets channel list. Starts scanning cycle. Start count loop. Advances channel list to next channel. Increment count loop.

68 Relay Multiplexer Command Reference

:SOURce

Parameters

Comments • Enabling the Trigger Source: The TRIGger:SOURce comma nd only selects

TRIGger:SOURce BUS|EXTernal|HOLD|IMMediate specifies the trigger source

to advance the channel list during scanni ng.

Parameter Name Parameter Type Range of Values

BUS discrete *TRG command

EXTernal discrete Event In BNC port

HOLD discrete Hold triggering

IMMediate discrete Continuous triggering

the trigger source. The source.

INITiate[:IMMediate] command enables the trigger

• Using the TRIG Command: Y ou 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 E1300/E1301 Mainframe "Event In" port. The trigger input is assigned to the first switchbox requesting the external trigger source.

• Assigning External Trigger: A switchbox assigned with TRIG:SOUR EXT

remains assigned to that source until it receives a command to change the source to trigger source is available to another switchbox (with a

EXTernal

source if the source is already assigned, or an error is generated.

BUS, HOLD, or IMMediate. When the source is changed, the external

command). Another switchbox cannot receive an external trigger

• Using Bus Triggers: To trigger the switchbox with TRIGger:SOURce BUS

selected, use the IEEE 488.2 common command Execute Trigger (

GET).

• "Trig Out" Port Shared by Switchboxes: See the OUTPut command.

• Related Commands: [ROUTe:]SCAN, TRIGger, ABORt

• *RST Condition: TRIGger:SOURce IMMediate

Example Scanning Using External Triggers

In the following e xample, the trigg er input is applie d to the E1300/E130 1 Mainframe "Event In" port.

TRIG:SOUR EXT SCAN (@100:115) INIT trigger externally

TRIGger:SOURce

*TRG or the GPIB Group

Sets trigger source to external. Sets channel list. Starts scanning cycle. Advances channel list to next channel.

Relay Multiplexer Command Reference 69

Scanning Using Bus Triggers

:SOURce?

Example Query Trigger Source

TRIG:SOUR BUS SCAN (@100:115) INIT *TRG

TRIGger:SOURce? returns the current trigger source for the switchbox. Command

returns either

IMMediate, respectively.

TRIG:SOUR EXT TRIG:SOUR?

BUS, EXT, HOLD, or IMM for trigger sources BUS, EXTernal, HOLD,

Select interface (BUS) triggering. Sets channel list. Starts scanning cycle. Advances scan using BUS triggering.

Sets trigger source to external. Query trigger source; returns EXT.

70 Relay Multiplexer Command Reference

IEEE 488.2 Common Commands

The following table lists the IEEE 488.2 Common (*) Commands that all four 16-Channel Relay Modules accept. The operation of some of these commands is described in Chapter 4 of this manual. For more information on Common Commands, refer to the 75000 Series B Mainframe User's Ma nual (Model Number E1300/E1301) or the ANSI/IEEE Standard 488.2-1987.

Command Title Description

*IDN?

*RST

*TST?

*OPC

*OPC?

*WAI

*CLS *ESE

*ESE?

*ESR?

*SRE

*SRE?

*STB?

*TRG Trigger Triggers the switchbox to advance the scan when scan is enabled and

*RCL *SAV

Note: These commands apply to many instruments and are not documented in detail here. See the

Series B E1300/E1301 Mainframe User's Manual

Identification Reset

Self-Test Operation Complete

Operation Complete Query Wait to Complete

Clear status Event status enable Event status enable query Event status register query Service request enable Service request enable query Read status byte query

Recall instrument st ate Store instrument state

Returns identification string of the switchbox. Opens all channels, and invalidates current channel list for scanning. Sets ARM:COUN 1, TRIG:SOUR IMM, and INIT:CONT OFF.

Always returns 0. See note below.

See note below. See note below.

Clears all status registers (see STATus:OPERation[:EVENt]?). See note below. See note below. See note below. Enables status register bits (see Chapter 4 for operation). See note below. See note below.

trigger source is TRIGger:SOURce BUS. See note below.

See note below.

75000

or the ANSI/IEEE Standard 488.2-1987 for more information.

Relay Multiplexer Command Reference 71

Command Quick Reference

The following tables summariz e SCPI and IEEE 488.2 Common (*) Commands for the multiplexer modules used in a switchbox.

SCPI Commands Quick Reference

Command Description

ABORt Abort a scan in progress. ARM :COUNt <

:COUNt? [MIN | MAX]

DISPlay :MONitor:CARD <

:MONitor[:STATe] <

INITiate :CONTinuou s <

:CONTinuous? [:IMMediate]

OUTPut [:STATe] <

[:STATe]?

[ROUTe:] CLOSe <

CLOSe? < OPEN < OPEN? < SCAN < SCAN:MODE NONE|VOLT|RES|FRES SCAN:MODE? SCAN:PORT NONE|ABUS

STATus :OPERation:ENABle

:OPERation[:EVENt]?

SYSTem :CDEScription? <

:CPON < :CTYPe? < :ERRor?

number> MIN|MAX

number>|AUTO

mode>

channel _list>

number>

number>|ALL

number>

mode>

Multiple scans per INIT command. Query number of scans.

Selects module to be monitored. Selects monitor mode.

Enables/disables co ntin uous scanning. Query mode. Starts a scanning cycle.

Enables/disables "Trig Out" pulse. Query state of trig out pulse.

Close channel(s). Query channel(s) closed. Open channel(s). Query channel(s) opened. Define channels for scanning. Selects appropriate Channel Switches for Measurements. Query state of scan mode. Enables Tree Switches closure as part of a Measurement.

Enables the Operation Status Register to set a bit in the Status Register. Returns status of Operation Status Register.

Returns description of module in a switchbox. Sets specified module to its power-on state. Returns the module type. Returns error number/message in a switchbox Error Queue.

TRIGger [:IMMediate]

:SOURce BUS :SOURce EXTernal :SOURce HOLD :SOURce IMMediate :SOURce?

Causes a trigger to occur. Trigger source i s *TRG. Trigger source is "Event In" BNC. Hold off triggering. Continuous (internal) triggers. Query scan trigger source.

IIEEE 488.2 Common Commands Quick Reference

Command Title Description

*RST Reset Opens all channels, invalidates current channel list for scanning.

Sets ARM:COUN 1, TRIG:SOUR IMM, and INIT:CONT OFF.

*TRG Bus Trigger When scan is enabled and trigger source is TRIG:SOUR BUS, use the *TRG

command to trigger the switchbox to advance the scan.

*TST? Self Test Always returns 0.

72 Relay Multiplexer Command Reference

Appendix A

16-Channel Relay Multiplexer

Specifications

Agilent E1343A/44A 16-Channel Relay Multiplexer

Maximum Voltage:

Terminal to Terminal: 250 Vdc or ac Terminal to Chassis: 250 Vdc or ac

Maximum Current per Channel:

50 mA (non-inductive)

Maximum Power per Channel: 1 VA

Thermal Offset per Channel:

<10µV (differential H-L)

Closed Channel Resistance:

100 Ω ± 10% (the value of the protection resistors)

Insulation Resistance (Between any two points): >109 Ω (at 40°C, 65% RH)

Relay Life:

@ No Load: 10 @ Rated Load: 10

Bandwidth (-3dB):

Z(source) = Z(load) = 50 Ω (Protection resistors shorted) >10 MHz

Operations

; 354 V Peak

rms

354 V Peak

rms;

Reference Junction Measurement Accuracy ( E1344A only):

0.4° C (over 18° to 28° C, operating temperature)

Screw Terminal Wire Size: 16 AWG Max; 26 Min Module Size/Device Type: B, register-based Connectors Used: P1 Number of Slots: 1

VXIbus Interface Capability:

Interrupter, D16

Interrupt Level: 1-7, selectable

Power Requirements:

Voltage +5 Peak module current, IPM (A): 0.20 0.13 Dynamic module current, IDM (A): 0.01 0.01

Watts/Slot: 1.0

Cooling/Slot:

0.02 mm H

O @ 0.10 liter/sec

+12

Channel-Channel Crosstalk (Typical) (50 Ω Source & Load):

1 kHz -80 dB 10 kHz -80 dB 100 kHz -80 dB 1 MHz -60 dB 10 MHz -40 dB

Closed-Channel Capacitance:

High-Low <150 pF Low-Guard <150pF Guard-Chassis <2000p F

Humidity: 65% 0° to 40° C, Operating Temperature: 0° to 55° C, Storage Temperature: - 40° to 75° C,

EMC, RFI, Safety:

meets FTZ1046/1984, CSA556B, IEC348, UL1244

Net Weight (kg): 0.9

16-Channel Relay Multiplexer Specifications 73Appendix A

Agilent E1345A/47A 16-Channel Relay Multiplexer

Maximum Voltage:

Terminal to Terminal: 120 Vdc or ac Terminal to Chassis: 120 Vdc or ac

; 170 V Peak

rms

; 170 V Peak

rms

Maximum Current per Channel:

50 mA (non-inductive)

Maximum Power per Channel: 1 VA

Thermal Offset per Channel:

<4 µV (differential H-L)

Closed Channel Resistance:

100 Ω ±10% (the value of the protection resistors)

Insulation Resistance (Between any two points):

Ω (at 40°C, 65% RH)

>10

Relay Life:

@ No Load: 10 @ Rated Load: 10

Operations

Bandwidth (-3dB):

Z(source) = Z(load) = 50 Ω (Protection resistors shorted) >10 MHz

Reference Junction Measurement Accuracy ( E1347A only):

0.3°C (over 18° to 28°C, operating temperature)

Screw Terminal Wire Size: 16 AWG Max; 26 Min Module Size/Device Type: B, register-based Connectors Used: P1 No. Slots: 1

VXIbus Interface Capability:

Interrupter, D16

Interrupt Level: 1-7, selectable

Power Requirements:

Voltage +5

+12 Peak module current, IPM (A): 0.20 0.13 Dynamic module current, IDM (A): 0.01 0.01

Watts/Slot: 1.0

Cooling/Slot:

0.02 mm H

O @ 0.10 liter/sec

Channel-Channel Crosstalk (Typical) (50 Ω Source & Load):

1 kHz -80 dB 10 kHz -80 dB 100 kHz -80 dB 1 MHz -60 dB 10 MHz -40 dB

Closed-Channel Capacitance:

High-Low <150 pF Low-Guard <150pF Guard-Chassis <2000pF

Humidity: 65% 0° to 40°C Operating Temperature: 0° to 55°C Storage Temperature: - 40° to 75°C

EMC, RFI, Safety:

meets FTZ1046/1984, CSA556B, IEC348, UL1244

Net Weight (kg): 0.9

74 16-Channel Relay Multiplexer Specifications Appendix A

Relay Life

Electromechanical relays are subject to normal wear-out. Relay life depends on several factors. The effects of loading and switching frequency are briefly discussed below:

Relay Load. In general, higher power switching reduces relay life. In addition, capacitive/induc tive loads and high inrush currents (e .g., 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 i ncreases, the contacts have less ti me to dissipate h eat. The resulting increase in contact temperature also reduces relay life.

End of Life Detection

A preventative maintenance routine can prevent problems caused by unexpected relay fail ure. The e nd of the li fe of t he rela y can be de termin ed by using the three methods described below. The best method (or combination of methods), as well as the failure criteria, depends on the application in which the relay is used.

Contact Resistance. As the relay be gin s to wear out, its contact resista nce increases. When the resistance exceeds a predetermined value, the relay should be replaced.

Stability of Contact Resistance. The stability of the contact resist an ce decreases with age. Using this method, the contact resistance is measured several (5-10) times, and the v ariance of the measurements is determined. An increase in the variance indicates deteriorating performance.

Number of 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.

Replacement Strategy

The replacement strategy depends on the application. If some relays are used more often, or at a higher load, than the others, the relays can be individually replaced as needed. If all the relays see similar loads and switching frequencies, the entire circuit board should be replaced when the end of life approaches. The sensitivity of the appli cation should be weighed against the cost of replacing relays with some useful life remaining.

Note Relays that wear out normally or fail due to misuse should not be

considered defective and are not covered by the product's warranty.

16-Channel Relay Multiplexer Specifications 75Appendix A

Notes:

76 16-Channel Relay Multiplexer Specifications Appendix A

Appendix B

16-Channel Relay Multiplexer Registers

Addressing

Register addresses for register-based devices are located in the upper 25% of VXI A16 address space. Every VXI device (up to 256 devices) is allocated a 64 byt e ( 32 wor d) bl ock of addresses. The Multi pl exe r uses six of the 64 addresses allocated.

Figure B-1 shows the register address location within A16. Figure B-2 shows the location of A16 address space in the E1300/01 Mainframe and E1405/06 Command Module.

Figure B-1. Relay Multiplexer Registers within A16 Address Space

16-Channel Relay Multiplexer Registers 77Appendix B

Figure B-2. Multiplexer Registers within E1300/E1406 A16 Address Space

The Base Address When you are readi ng or wr itin g to a mu ltipl exer regi ster, a hexade cimal or

decimal register address is specified. This address consists of an A16 base address plus a register offset or register number.

The A16 base address used in register-based programming depends on whether the A16 address space is located inside the E1300(01) Mainframe, E1405/06 Command Module, or elsewhere (e.g., embedded computer). Figures B-1, B-2, and Table B-1 enable you to determine the base address for the following computer configurations:

•E1300/E1301 Instrument BASIC (IBASIC)

•External Computer over GPIB to E1300/E1301 Mainframe or

E1405/06 Command Module

•V/382 Embedded Controller (C-Size system)

Computer

Configurations

78 16-Channel Relay Multiplexer Registers Appendix B

This section contains performance and functional information on the computer configuratio ns that can be used wit h regist er-ba sed programmi ng.

Throughput Speed Throughput speed is based on the amount of comman d parsing and whether

the registe rs are accessed from the VXI backplane or from the GPIB. T he computer configurations which allow faster throughput relative to each other are summarized below.

1. E1499A V/382 Controller with

READIO and WRITEIO

(register access is from VXI backplane).

2. E1300/01 IBASIC absolute addressing with (register access is from VXI backplane).

3. E1300/01 IBASIC select code 8 wi th

READIO and WRITEIO (regis ter

access is from VXI backplane).

4. External Computer using

DIAG:PEEK? and DIAG:POKE

(register access is over GPIB).

5. External Computer using

VXI:READ? and VXI:WRITE

(register access is over GPIB).

Table B-1. Computer Configurations used with Relay Multiplexers

Computer Programming Method Base Address

E1300/E1301 IBASIC (Absolute Addressing)

(Select Code 8)

READIO (-9826,Base_addr + offset) WRITEIO -9826,Base_addr + offset;data

(positive select code = byte read or write negative select code = word read or write)

READIO (8,Base_addr + reg number)

Base_addr = 1FC000

or = 2,080,768 + (LADDR * 64)

offset = register offset (Figure B-1)

Base_addr = LADDR * 256

READIO and WRITEIO

+ (LADDR * 64)

WRITEIO 8,Base_addr + reg number;data

External Computer

(over GPIB to E1300/E1301

Mainframe

or E1405/E1406 Command

Module)

V/382 Embedded Computer

(C-Size system)

LADDR : logical address. (LADDR * 64)

When using DIAG:PEEK? and DIAG:POKE, the width (number of bits) is 8 or 16.

: multiply quantity, then convert to a hexadecimal number (e.g. 80 * 64)16 = 140016.

VXI:READ? logical_address,offset VXI:WRITE logical_address,offset,data

DIAG:PEEK? Base_addr + offset,width DIAG:POKE Base_addr + offset,width,data

READIO (-16,Base_addr + offset) WRITEIO -16,Base_addr + of fs et;d at a

(positive select code = byte read or write negative select code = word read or write)

reg number = offset (Figure B-1)/2 logical address setting (LADDR)

offset = register offset (Figure B-1)

Base_addr = 1FC000

or = 2,080,768 + (LADDR * 64)

offset = register offset (Figure B-1) Base_addr = C00016 + (LADDR *64)

or = 49,152 + (LADDR * 64)

offset = register offset (Figure B-2)

+ (LADDR * 64)

16-Channel Relay Multiplexer Registers 79Appendix B

Embedded Computer

Programming

(C-Size Systems)

If the relay multiplexer is part of a C-Size VXI system, th e fastest throughput is achieved using an embedded computer. The embedded comput er allows you to access the r egisters f rom the VXI bus backpl ane, and th us, there i s no parsing of SCPI command headers.

IBASIC Programming When the relay multiplexer is programmed using the E1300/E1301

Mainframe's Instrument BASIC (IBASIC), two methods o f accessing the registers are through absolute addressing or using select code 8.

Absolute Addressing

and Select Code 8

The Register Offset and

Absolute addressing is faster than select code 8 since the complete register address (includ ing th e A16 starting locat ion 1FC000

) is specified . W hen

select code 8 is used, the IBASIC processor must calculate the complete register address based on the logical address specified (Table B-1).

Depending on whether a bsolut e addr essin g or se lect code 8 is u sed, ei ther a register offset or r egist er number is speci fied as part of the reg ister addres s. Absolute addressing specifies a register offset, which is the register's location in the block of 64 address bytes. For example, the multiplexer's Channel Register has an offs et of 08

. When you write a command to this

= 1FC000 = 1FC00016 + 140016 +0816 = 1FD408

+ (80 * 64)16 + 08

= 2,080,768 + (80 * 64) + 8 = 2,080,768 + 5120 + 8 = 2,085,896

Using select code 8 requires that you specify a register number. The register number is the register offse t/2. Referring to Fi gure B-1, the Channel Register with an offset of 08, is register number 4.

External Computer

Programming

When the multiplexer is programmed by an external computer through the E1300/E1301 Mainframe or E1405/E1406 Command Module, th e regist ers are accessed using

VXI:WRITE

DIAG:PEEK?/DIAG:POKE and VXI:READ?/VXI:WRITE

DIAG:PEEK? and DIAG:POKE, or VXI:READ? and

Throughput speed using DIAG:PEEK? and DIAG:POKE is faster than

VXI:READ?

(including the A16 starting location 1FC000 and

VXI:WRITE specify the device log ic al addr es s and register offset only.

and VXI:WRITE because the complete register address

) is specified. VXI:READ?

Thus, the E1300/E1406 processor must calculate the complete register address which decreases throughput speed.

IBASIC programming using absolute addressing or select code 8 is faster than either

DIAG:PEEK? and DIAG:POKE or VXI:READ? and VXI:WRITE

because the registers are accessed from the VXIbus backplane rather than from the GPIB. Also,

80 16-Channel Relay Multiplexer Registers Appendix B

READIO and WRITEIO are not parsed.

Reading the

You can read the following multiplexer registers:

Registers

ID and Device Type

Registers

ID Model Description

FF00 E1345A 16-Channel 3 Wire Relay Multiplexer FF01 E1343A 16-Channel 3 Wire High Voltage Relay Multiplexer FF02 E1347A 16-Channel Thermocouple Relay Multiplexer

-- ID Register (base +00

-- Device Type Register (base +02

-- Status Contro l Register (base +0 4

-- Tree Switch Registers (base +06

-- Channel Registers (base +08

)

ID Registers: Reading thi s register returns FFFF16. This shows Agilent Technologies as the manufacturer and that the module is an

A16 register based devic e. Device Type Register: Reading this register returns:

FF03 E1344A 16-Channel Thermocouple High Voltage Relay Multiplexer FF04 E1355A 8-Channel 120 Ohm Strain Relay Multiplexer FF06 E1356A 8-Channel 350 Ohm Strain Relay Multiplexer

Status Control Register Each channel requires about 1 msec to close or open (2 msec for a close /open

cycle). During this time, an d al so duri ng a res et, th e mult iple xer is "b usy". The Status Register returns the following:

Tree Switch and Channel

"busy": FFF7 "not busy": FFFF

Always returns FFFF16 regardles s of channel/tree switch state.

Registers

16-Channel Relay Multiplexer Registers 81Appendix B

Writing to the

You can write to the following multiplexer registers:

Registers

-- Status Control Register (base +04

-- Tree Switch Registers (base +06

-- Channel R egisters (base +08

)

Status Control Register Writing a "1" to bit 0 of this register resets the interface circuitry to its

power-on state and opens all channels. This is the only allowable write to this register.

Bit 7 is the only bit that has meaning when reading this register. The busy bit will go true for about 1 msec after a write to either the Tree Switch Register or the Channel Reg isters. The transition of the bus y bit from "busy" to "not busy" corresponds to a backplane interrupt occurring. A backplane interrupt always occurs after a channel write.

Tree Switches and Channel Registers

Writing a "1" to these registers closes the channel/tree switch and writing a "0" opens the channel/tree switch.

Resetting the Module To reset the module:

1. Write a "1" to bit 0 of the Status Control Register

2. Wait 100 usec

3. Write a "0" to bit 0 of the Status Control Register

NOTE: The busy bit in this case does not indicate when the relays have settled.

Changing Channels 1. Write to the Tree Switch a nd Channel Registe rs.

2. Wait for busy to go to "1" or for a backplane interrupt.

82 16-Channel Relay Multiplexer Registers Appendix B

Figure B-3 for register definitions.

ID Register

Base +00

1514131211109876543210

Write Undefined (Logical Address)

Read* Reg-Base A16 Manufacturer ID

* Returns FFFF16 =Hewlett-Packard A16 only register-based

Device Type Register

Base +02

Write Undefined

Read* 1 (A16 only) Module ID Code

1514131211109876543210

* Returns: FF0016 =16-Channel Relay Multiplexer (E1345A) FF0116 =16-Channel High Voltage Relay Multiplexer (E1343A) FF02

=16-Channel Thermocouple Relay Multiplexer (E1347A)

FF0316 =16-Channel Thermocouple High Voltage Relay Multiplexer (E1344A)

Status/Control Register

Base +04

Write* Undefined R

Read** B

1514131211109876543210

* R =Multiplexer reset to power-on state (all switches open) ** B =Status "busy" is true low in bit #7 (FF7F

)

Tree Switch Register

Base +06

Write* Undefined 93929190

Read Always returns FFFF

1514131211109876543210

* Write "1" closes switch, write "0" opens switch

Channel Registers

Base +08

Write* CH15 CH14 CH13 CH12 CH11 CH10 CH09 CH08 CH07 CH06 CH05 CH04 CH03 CH02 CH01 CH00

Read Always returns FFFF

1514131211109876543210

* Write "1" closes channel, write "0" opens channel

Figure B-3. Multiplexer Register Definitions

16-Channel Relay Multiplexer Registers 83Appendix B

Notes:

84 16-Channel Relay Multiplexer Registers Appendix B

Appendix C

16-Channel Relay Multiplexer

Error Messages

Table C-1 lists the error messages associated with the multiplexer modules programmed by SCPI. See the appropriate Mainframe manual for a complete list of error messages.

Table C-1. 16-Channel Relay Multiplexer Error Numbers/Messages

Number Title 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 progress.

-224 Illegal parameter value Attempting to execute a command with a parameter not applicable to the comman d.

+1500 External trigger source

already allocated

+2000 Invalid card number Addressing a module (card) in a switchbox that is not part of the

+2001 Invalid channel number Attempting to addres s a channe l of a module in a switchb ox that is not

+2006 Command not supported

on this card +2008 Scan list not initialized Executing a scan without the +2009 Too many channels in

channel list +2012 Invalid Channel Range Invalid channel(s) specified in

Assigning an external trigger source to a switchbox when the trigger source has already been assigned to another switchbox.

switchbox.

supported by the module (e.g., channel 99 of a multiplexer module). Sending a command to a module (card) in a switchbox that is

unsupported by the module.

Attempting to address more channels than availa ble in the switchbox.

Attempting to begin scanning when no valid channel list is defined.

INIT command when a scan is already in

INIT command.

SCAN <channel_list> command.

+2600 Function not suppor ted on

this card +2601 Channel list required Sending a command requiring a channel list without the channel list.

Sending a command to a module (card) in a switchbox that is not supported by the module or switchbox.

16-Channel Relay Multiplexer Error Messages 85Appendix C

Notes:

86 16-Channel Relay Multiplexer Error Messages Appendix C

Index

Symbols:

*CLS, 71 *ESE, 71 *ESE?, 71 *ESR?, 71 *IDN, 71 *OPC, 71 *OPC?, 71 *RCL, 71 *RST, 71–72 *SAV, 71 *SRE, 46, 71 *SRE?, 71 *STB?, 46, 71 *TRG, 71–72 *TST?, 71–72 *WAI, 71

A16 Address Space, 77–78 Abbreviated Commands, 48 ABORt Command, 50 Absolute Addressing, 80 Adding

current shunts signal conditioning compo nent s, 27–28

Address

channel logical, 14–15, 23–25

verifying, 25 registers, 77–79 switch, setting, 23

Analog Bus, 12, 22, 34–35

cables, 12, 22, 36 connecting, 22, 34–36 connector, 12, 22, 34–36

ARM Subsystem, 51–52 ARM:COUNt, 31, 38, 51 ARM:COUNt?, 52 AT Tree Switch, 11–13

closing, 34, 38–39 connecting terminals , 36 opening, 35

AT2 Tree Switch, 11, 13

closing, 38–39 opening, 35

Attenuator Configuration, 27–28

, 27–28

, 16

Bank Channels, 11, 32, 34 Base Address, 78–79 Block Diagram, 13 Boolean Command Parameters, 49 BT Tree Switch, 11–13

closing, 34, 38 opening, 35

Bus Triggers, using, 70

Cables, analog bus, 12, 22 Capacitance, closed-channel, 73–74 Card

ID, setting

numbers, 14–16, 33, 38 Caution, 19 Changing Channels, 82 Channel

address

changing, 82

closing, 16–17, 32, 58

closing multiple, 33

closing/opening order, 33

common, 11, 32

connecting to common, 32

connecting to tree terminals, 34–35

connections, 11–13

descriptions, 11–12

lists, 58–60

measuring, 11

opening, 33, 59

opening multiple, 33

query open/closed, 33, 59–60

relay switches, 11

scanning, 60

selecting, 14

switches, 11 Closing

channels

multiple cha nnels, 33

order for multiple channels, 33 *CLS, 71

, 23

, 16

a range of, 36 commands used, 41 switchbox, 41, 60–61

, 16–17, 32, 58

Index 87

C (continued)

Command Reference Commands

abbreviated IEEE 488.2, 47, 71 implied, 16, 48 linking, 49 optional, 16, 48

parameters, 49 parameters, 49 quick reference, 72 scanning, 42 scanning switchbox channels, 41 SCPI, 47–49, 72

format, 16, 47 separator, 48 types, 47–49

Common (*) Commands, 47

*CLS, 71 *ESE, 71 *ESE?, 71 *ESR?, 71 *IDN?, 71 *OPC, 71 *OPC?, 71 *RCL, 71 *RST, 71–72 *SAV, 71 *SRE, 46, 71 *SRE?, 71 *STB?, 46, 71 *TRG, 71–72 *TST?, 71–72 *WAI, 71 format, 47 list of, 71 quick reference, 72

Common Terminals, 11, 32 Computer Configurations, 79 Configuring

multiplexer modules scanning voltmeter, 24 switchbox, 25

Connecting

analog bus channels to common, 32 channels to tree terminals, 34–35 field wiring, 20

, 47–72

, 48

, 19–30

, 22, 34–36

Connecting (continued)

user inputs

Connector

analog bus pins, 29

Control Register, 81

definition, 83 writing to, 82

Current

maximum allowed shunts, 27–28 source direct, 13 source tree, 13 specifications, 73–74

, 29

, 12

, 19

Device Type Register, 83

reading, 81 DIAG:PEEK?, 79–80 DIAG:POKE, 79–80 Discrete Co mmand Parameters, 49 DISPlay Subsystem, 53–54 DISPlay:MONitor:CARD, 53 DISPlay:MONitor[:STATe], 54

Embedded Computer Programming, 80 Error

messages

numbers, 85

queue, 67 *ESE, 71 *ESE?, 71 *ESR?, 71 Event In Port, 41

scanning using, 45 Examples

closing channels

connecting channels to common, 32

connecting channels to tree ter minals, 34–35

initial operation, 17

making continuous scans, 38

making multiple scans, 38

measure voltage by scanning, 36

measuring thermocouple temperature, 39

resetting the switchbox, 17

scan complete interrupt, 46

scanning 2-wire ohms measurements, 38

, 85

, 17

88 Index

E (continued)

Examples (continued)

scanning 4-wire ohms measurements scanning using event in port, 45 scanning using trig out port, 45 scanning w ith external devices, 44, 60–61

External

computer programming devices, scanning with, 60–61 trigger port, 44–45 triggers, scanning with, 69

, 80

Field Wiring, connecting, 20 Five Volt Excitation for Strain Gages, 27

Getting Started, 11–18 GPIB

interface select code primary address, 17, 41, 46 secondary address, 17, 41, 46 service request (SRQ), 46

Guidelines, wiring, 20

, 17, 41, 46

IBASIC Programming, 80 ID Register , 83

reading, 81

*IDN, 71 IEEE 488.2 Commands

Common (*) Commands

Implied Commands, 16, 48 Initial Operation, 17 INITiate Subsystem, 55–56 INITiate:CONTinuous, 31, 38, 55 INITiate:CONTinuous?, 56 INITiate[:IMMediate], 31, 56 Insulation Resistance, 73–74 Interrupt

generating level, 73–74 lines, 26 priority, selecting, 26 scan complete, 46

, 26

, 47

, 38

Jumper

card ID

interrupt priority, 26

JM1 and JM2, 27

terminal module, 12

, 23

Linking Commands, 49 Logical Address, 14–15, 23

changing, 23

factory setting, 23

scanning voltmeter, 24

switch, setting, 23

switchbox, 25

verifying settings , 25 Low Pass Filter Configuration, 27–28

Measure

2-wire ohms

by scanning, 38

4-wire ohms, 35

by scanning, 38 channels, 11 multiplexe r channels, 11 resistance, 34 temperature

using multimeters

using thermistors, 40

using thermocouples, 39–40 thermistor, 12

resistance, 39 thermocouple voltage, 39 voltage, 34

by scanning, 36 with multimeters, 35

Modules, terminal, 11, 20–21 Multimeter

external trigger port measuring with, 35, 39–40 primary address, 41 voltmeter complete port, 45

, 34

, 40

, 44–45

Index 89

M (continued)

Multiplexer Module

block diagram card numbers, 14 changing channels, 82 channel, 11–13

address, 16

connections, 11–13 channels, 11 command reference, 47–72 configuring, 19–30 description, 11 error messages, 85 error numbers, 85 initial operation, 17 programming, 14 reading registers, 81 register de finitions, 83 register types, 81 registers, 83 resetting, 82 selecting channels, 14 specifications, 73–74 understanding, 41–46 using, 31–40

with HP command module, 24

with HP mainframe, 24 writing to registers, 82

, 13

Numeric Command Parameters, 49

*OPC, 71 *OPC?, 71 Opening

channels multiple cha nnels, 33 order for multiple channels, 33

Operation Status Register, 46, 63

bit value, 64 setting bit 8, 64

Optional

command parameters commands, 16, 48

OUTPut Subsystem, 57 OUTPut[:STATe], 57 OUTPut[:STATe]?, 57

, 33, 59

, 49

Parameters, 49 Pinout, 29 Port

Event In

external trigger, 44–45 Trig Out, 36, 44

voltmeter complete, 45

Program Examples

closing channels measure voltage by scanning, 36 resetting the switchbox, 17 scan complete interrupt, 46 scanning using event in port, 45 scanning using trig out port, 45

scanning with external devices, 44, 60–61 Programming the Multiplexer Module, 14 Protection Resistors, 13

, 41

scanning using, 45

enabling, 41, 57 query state, 57 scanning using, 45 shared by switchboxes, 57

, 17

Query

error queu e

open/closed channels, 33, 59–60

scanning

cycles mode state, 62

states, 56 trig out port, 57 trigger sources, 70

, 67

, 52

*RCL, 71 Reading

channel registers device type registers, 81 ID register s, 81 registers, 81 status/control registers, 81 tree switch registers, 81

READIO, 79–80

, 81

90 Index

R (continued)

base address, 78–79 computer configurations, 79 DIAG:PEEK?, 79–80 DIAG:POKE, 79–80 embedded computers, 80 external computers, 80 IBASIC, 80 register number, 80 register offset, 80 throughput speed, 79–80 VXI:READ?, 79–80 VXI:WRITE, 79–80

Registers

addressing base address, 78–79 channel, 80 channel register, 81–83 control register, 81–83 definitions, 83 device type register, 81, 83 ID register , 81, 83 number, 80 offset, 80 operation status regist er, 46, 63–64 reading, 81 status register, 46, 63, 81–83

tree switch register, 81–83 Relay Life, 73–75 Relay Replacement Strategy, 75 Resetting the Module, 82 Resistance Measurement, 34 Resistors

location of

purpose of, 12 [ROUTe:] Subsystem, 58–62 [ROUTe:]CLOSe, 31, 33, 58 [ROUTe:]CLOSe?, 31, 33, 59 [ROUTe:]OPEN, 31, 33, 35, 59 [ROUTe:]OPEN?, 33, 60 [ROUTe:]SCAN, 31, 38, 60–61 [ROUTe:]SCAN:MODE, 31, 38, 61 [ROUTe:]SCAN:MODE?, 62 [ROUTe:]SCAN:PORT, 31, 38, 62 *RST, 71–72 RT Tree Switch, 12–13

closing, 39

, 77–79

, 13

, 77–83

Safety Warnings, 19 *SAV, 71 Scan Complete Bit, 46 Scanning

channels commands, 41–42 continuous cycles, 38, 55 cycle, 51, 56

query state, 56 range of channels, 36 requirements of a switchbox, 38 trigger sources, 41, 69–70 using

with external instruments, 41, 44, 60–61

Scanning Voltmeter

card numbers configuration, 14, 24 logical address, 24

selecting channels, 14 Schematic, simplified, 13 SCPI Commands, 47–49, 72

abbreviated, 48

ABORt, 50

ARM subsystem, 51–52

DISPlay subsystem, 53–54

format used, 16, 47

implied, 16, 48

INITiate sub system, 55–56

linking, 49

optional, 16, 48

OUTPut subsystem, 57

parameters, 49

programming with, 14

quick reference, 72

reference, 49–70, 72

[ROUTe:] subsystem, 58–62

scanning, 42

STATus subsystem, 63–64

, 60

continuous, 38, 55 multiple, 38 query, 52

bus triggers event in port, 45 external triggers, 69 trig out port, 45

, 70

, 14–15

parameters, 49

Index 91

S (continued)

SCPI Commands (continued)

SYSTem subsystem TRIGger su bsystem, 68–70

Select Code 8, 80 Selecting

channels interrupt priority, 26

Service Request (SRQ), GPIB, 46 Setting

card ID logical address switch, 23 scan complete bit, 46

Signal Conditioning Components, adding, 27–28 Soft Front Panel Information.

See VXIplug&play Online Help

Specifications Speed of Throughput, 79–80 *SRE, 46, 71 *SRE?, 71 Static Electricity, 19 Status Register, 46, 63

definition, 83 reading, 81

writing to, 82 STATus Subsystem, 63–64 STATus:OPERation:ENABle, 46, 63 STATus:OPERation[:EVENt]?, 46, 64 *STB?, 46, 71 Strain Gages, 5 volt excitation, 27 Switchbox

card numbers

configuration, 14, 25

connecting

continuous scanning, 55

logical address, 14–15, 25

measure thermocouple temperature, 39

multiple module, 15, 33

scanning

selecting channels, 14

single module, 14, 33

, 14

, 23

, 73–74

channels to common to tree terminals, 34–35

channels commands, 41 range of channels, 36 requirements, 38

, 41, 60–61

, 65–67

, 14–15

, 32

Switches

AT Tree AT2 Tree, 11, 13, 35, 38–39 BT Tree, 11–13, 34–35, 38 channel, 11

logical address, 23 RT Tree, 12–13, 39

tree, 11–13 SYSTem Subsystem, 65–67 SYSTem:CDEScription?, 65 SYSTem:CPON, 66 SYSTem:CTYPe?, 66 SYSTem:ERRor?, 67

, 11–13, 34–36, 38–39

relay, 11

Temperature Measurement, 39–40 Terminal Modules, 11

jumper, 12

wiring, 21

guidelines, 20

Thermocouple

compensation

measuring temperature with, 39–40

wiring, 20 Throughput Speed, 79–80 Tree Switches, 11–12

AT, 11–13, 34–36, 38–39

AT2, 11, 13, 35, 38–39

BT, 11–13, 34–35, 38

RT, 12–13, 39

terminals, 11 Tree Terminals, connecting, 34–35 *TRG, 71–72 Trig Out Port, 36, 44

enabling, 41, 57

query state, 57

scanning using, 45

shared by switchboxes, 57 Trigger Sources, scanning, 41, 69–70 TRIGger Subsystem, 68–70 TRIGger[:IMMediate], 68 TRIGger:SOURce, 41, 69 TRIGger:SOURce?, 70 *TST?, 71–72

, 40

92 Index

Understanding the Multiplexer Modules, 41–46 Using

event in ports command module, 24–25 mainframe, 24–25 scan complete bit, 46 scanning trigger sources, 41 scanning voltmeter configuration, 24 switchbox configuration, 25 the relay multiplexer modules, 31–40 trig out ports, 45

, 45

Verifying Logical Address Settings, 25 Voltage

maximum allowed measurement, 34

by scanning, 36 sense direct, 13 sense tree, 13 specifications, 73–74

Voltmeter Complete Port, 45 VXI Peripheral Interrupt Bus, 26 VXI:CONF:DLAD?, 25 VXI:READ?, 79–80 VXI:WRITE, 79–80 VXIplug&play example programs

See VXIplug&play Online Help

VXIplug&play function reference

See VXIplug&play Online Help

VXIplug&play programming

See VXIplug&play Online Help

, 19

*WAI, 71 Warning, 19 Wiring

guidelines terminal mo dules, 20–21, 29

WRITEIO, 79–80 Writing

to registers to status control registers, 82

, 20

, 82

Index 93

Notes:

94 Index

Agilent E1343A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual