Contents
HP E1351A/53A FET Multiplexer User’s Manual
Warranty . . . . . . . . . .
WARNINGS . . . . . . . .
Safety Symbols . . . . . .
Declaration of Conformity .
Reader Comment Sheet . .
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5
6
6
7
9
Chapter 1.Getting Started with the HP E1351A/53A . . . . . . . . . . . . . . . . . . . . . 11
Using This Chapter . . . . . . . . . . . . . . . . .
FET Multiplexer Module Description . . . . . . . .
Multimeter Connection Points . . . . . . . . . . . .
Analog Bus Connector . . . . . . . . . . . . .
Tree Terminals . . . . . . . . . . . . . . . . .
Direct Terminals . . . . . . . . . . . . . . . .
Switchbox and Scanning Voltmeter Configurations
Switchbox . . . . . . . . . . . . . . . . . . . .
Scanning Voltmeter . . . . . . . . . . . . . . .
Digital Bus and Triggering . . . . . . . . . . . . .
Programming Language . . . . . . . . . . . . . . .
Initial Operation . . . . . . . . . . . . . . . . . . .
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11
11
12
12
12
12
14
14
15
15
16
16
Chapter 2.Configuring the HP E1351A/53A FET Multiplexer Modules . . . . . . . . . . 17
Using This Chapter . . . . . . . . . . . . . . . . . . . .
Warnings and Cautions . . . . . . . . . . . . . . . . . .
Multiplexer Card Numbers . . . . . . . . . . . . . . . .
Setting the Address Switch . . . . . . . . . . . . . .
Selecting the Interrupt Line Number . . . . . . . . . . .
Setting the Card ID Switch . . . . . . . . . . . . . . . .
Connecting User Inputs . . . . . . . . . . . . . . . . . .
Adding Signal Conditioning Components/Current Shunts
Connecting Field Wiring . . . . . . . . . . . . . . . . .
Wiring Guidelines . . . . . . . . . . . . . . . . . .
Wiring a Terminal Module . . . . . . . . . . . . . . . .
Connecting Multimeters and Signal Generators . . . . .
Analog Bus and Digital Bus Cables . . . . . . . . . . . .
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17
17
18
19
20
21
22
23
24
24
25
26
27
Chapter 3.Using the HP E1351A/53A FET Multiplexer Modules . . . . . . . . . . . . . . 29
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Switchbox Channels to Direct Terminals . . . . . . . . . . . . .
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Switchbox Channels to Tree Terminals for Making Measurements
Scanning a Range of Switchbox Channels . . . . . . . . . . . . . . . . . . .
Downloading a Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning a Switchbox without a Downloaded Scan List . . . . . . . . . . . .
Scanning a Switchbox with a Downloaded Scan List . . . . . . . . . . . . . .
Scanning Voltmeter Configuration with HP E1326B . . . . . . . . . . . . . .
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29
29
31
32
33
34
36
39
40
41
42
HP E1351A/53A FET Multiplexer User’s Manual Contents
1
Measuring Temperature Using Thermocouples
(HP E1353A Module only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Setup for Measuring Thermocouple Temperature using an External Multimeter . . 43
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Chapter 4.Understanding the HP E1351A/53A FET Multiplexer Modules . . . . . . . . . 45
Using This Chapter . . . . . . . . . . . . . .
Commands for Scanning Switchbox Channels
Using Scanning Trigger Sources . . . . . . .
Scanning with External Instruments . . .
Using the Scan Complete Bit . . . . . . . . .
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45
45
45
45
52
Chapter 5.HP E1351A/53A 16-Channel FET Multiplexer Command Reference . . . . . . 53
Using This Chapter . . . . . . .
Command Types . . . . . . . . .
Common Command Format
SCPI Command Format . .
Linking Commands . . . . .
SCPI Command Reference . . .
ABORt . . . . . . . . . . . . . .
ARM . . . . . . . . . . . . . . .
:COUNt . . . . . . . . . . .
:COUNt? . . . . . . . . . .
DISPlay . . . . . . . . . . . . .
:MONitor:CARD . . . . . .
:MONitor[:STATe] . . . . .
INITiate . . . . . . . . . . . . .
:CONTinuous . . . . . . . .
:CONTinuous? . . . . . . .
[:IMMediate] . . . . . . . .
OUTPut . . . . . . . . . . . . .
[:STATe] . . . . . . . . . .
[:STATe]? . . . . . . . . . .
[ROUTe:] . . . . . . . . . . . .
CLOSe . . . . . . . . . . .
CLOSe? . . . . . . . . . . .
OPEN . . . . . . . . . . . .
OPEN? . . . . . . . . . . .
SCAN . . . . . . . . . . . .
SCAN:MODE . . . . . . . .
SCAN:MODE? . . . . . . .
SCAN:PORT . . . . . . . .
SCAN:PORT? . . . . . . .
SETTling[:TIME] . . . . . .
SETTling[:TIME]? . . . . .
STATus . . . . . . . . . . . . .
:OPERation:ENABle . . . .
:OPERation[:EVENt]? . . .
SYSTem . . . . . . . . . . . . .
:CDEScription? . . . . . . .
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HP E1351A/53A FET Multiplexer User’s Manual Contents
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53
53
53
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:CPON . . . . . . . . . . .
:CTYPe? . . . . . . . . . .
:ERRor? . . . . . . . . . . .
TRIGger . . . . . . . . . . . . .
[:IMMediate] . . . . . . . .
:SOURce . . . . . . . . . .
:SOURce? . . . . . . . . . .
IEEE 488.2 Common Commands
Command Quick Reference . . .
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71
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76
77
Appendix A.HP E1351A/53A FET Multiplexer Specifications . . . . . . . . . . . . . . . . 79
Appendix B.HP E1351A/53A Register-Based Programming . . . . . . . . . . . . . . . . . 81
About This Appendix . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Base Address . . . . . . . . . . . . . . . . . . . . . . . . . .
A16 Address Space Outside the Command Module or Mainframe
A16 Address Space Inside the Command Module or Mainframe .
Register Offset . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . .
WRITE Registers . . . . . . . . . . . . . . . . . . . . . . . . . .
READ Registers . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Bit Descriptions . . . . . . . . . . . . . . . . . . . . . . . .
Manufacturer ID Register . . . . . . . . . . . . . . . . . . . . .
Device Type Register . . . . . . . . . . . . . . . . . . . . . . . .
Status/Control Register . . . . . . . . . . . . . . . . . . . . . . .
Scan Control Register . . . . . . . . . . . . . . . . . . . . . . . .
Scan Channel Delay Register . . . . . . . . . . . . . . . . . . . .
Scan Channel Configuration Register . . . . . . . . . . . . . . .
Direct Channel Configuration Register . . . . . . . . . . . . . . .
Direct Control Register . . . . . . . . . . . . . . . . . . . . . . .
Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . .
Register-Based Programming for Maximum Speed . . . . . . . . . .
Multimeter Command and Parameter Opcodes . . . . . . . . . .
Multimeter Register-Based Programming Error Codes . . . . . .
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81
81
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84
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90
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96
98
Appendix C.HP E1351A/53A FET Multiplexer Error Messages . . . . . . . . . . . . . . . 99
HP E1351A/53A FET Multiplexer User’s Manual Contents
3
Notes
4
HP E1351A/53A FET Multiplexer User’s Manual Contents
Certification
Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. HewlettPackard 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 Hewlett-Packard product is warranted against defects in materials and workmanship for a period of three years 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 HP products. During the warranty period, Hewlett-Packard Company 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 Hewlett-Packard (HP). Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping
charges, duties, and taxes for products returned to HP from another country.
HP warrants that its software and firmware designated by HP for use with a product will execute its programming instructions when
properly installed on that product. HP 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. HP does not warrant the Buyer’s
circuitry or malfunctions of HP products that result from the Buyer’s circuitry. In addition, HP 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. HP 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. HP 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. HEWLETT-PACKARD (HP) 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. HP 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 Hewlett-Packard Company. HP assumes no
responsibility for the use or reliability of its software on equipment that is not furnished by HP.
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Use, duplication or disclosure by the U.S. Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in
Technical Data and Computer Software clause in DFARS 252.227-7013.
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Rights for non-DOD U.S. Government Departments and Agencies are as set forth in FAR 52.227-19 (c) (1,2).
HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual
Edition 4
Copyright © 1995 Hewlett-Packard Company. All Rights Reserved.
HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual
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
Edition 2
Edition 3
Edition 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1990
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . September 1993
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . August 1994
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . July 1995
Safety Symbols
Instruction manual symbol affixed to product. Indicates that the user must refer to the
manual for specific WARNING or CAUTION information to avoid personal injury
or damage to the product.
Alternating current (AC).
Direct current (DC).
Indicates hazardous voltages.
Indicates the field wiring terminal that must
be connected to earth ground before operating the equipment—protects against electrical shock in case of fault.
or
Frame or chassis ground terminal—typically connects to the equipment’s metal
frame.
WARNING
Calls attention to a procedure, practice, or
condition that could cause bodily injury or
death.
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. Hewlett-Packard Company 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 a Hewlett-Packard 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 a Hewlett-Packard Sales and Service Office for
service and repair to ensure that safety features are maintained.
6
HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual
Declaration of Conformity
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Hewlett-Packard Company
Loveland Manufacturing Center
Manufacturer’s Address:
815 14th Street S.W.
Loveland, Colorado 80537
declares, that the product:
Product Name:
16-Channel FET Multiplexer Modules
Model Number:
E1351A, E1353A
Product Options:
All
conforms to the following Product Specifications:
Safety:
IEC 1010-1 (1990) Incl. Amend 1 (1992)/EN61010-1 (1993)
CSA C22.2 #1010.1 (1992)
UL 1244
EMC:
CISPR 11:1990/EN55011 (1991): Group1 Class A
IEC 801-2:1991/EN50082-1 (1992): 4kVCD, 8kVAD
IEC 801-3:1984/EN50082-1 (1992): 3 V/m
IEC 801-4:1988/EN50082-1 (1992): 1kV Power Line
.
Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.
Tested in a typical configuration in an HP B-Size VXI mainframe.
July 20, 1995
Jim White, QA Manager
European contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department
HQ-TRE, Herrenberger Straße 130, D-71034 Böblingen, Germany (FAX +49-7031-14-3143).
HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual
7
Notes
8
HP E1351A, E1353A 16-Channel FET Multiplexer Modules User’s Manual
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10
HP E1351A/53A 16-Channel FET Multiplexer Module User’s Manual
Chapter 1
Getting Started with the HP E1351A/53A
Using This Chapter
This chapter describes the HP E1351A 16-Channel FET and the
HP E1353A 16-Channel Thermocouple FET Multiplexer Modules, and
shows how to program the modules using SCPI (Standard Commands for
Programmable Instruments) commands. This chapter contains the
following sections:
•
•
•
•
•
•
FET Multiplexer Module Description . . . . . . . . . . . . . . . . . .
Multimeter Connection Points . . . . . . . . . . . . . . . . . . . . . . . .
Switchbox & Scanning Voltmeter Configurations . . . . . . . .
Digital Bus and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Language. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 11
Page 12
Page 14
Page 15
Page 16
Page 16
FET Multiplexer Module Description
The FET multiplexer module provides high-speed switching (multiplexing)
for up to 16 channels. The module can be used as a scanning multiplexer
for a scanning voltmeter configuration, or as a stand-alone multiplexer in a
switchbox configuration. The channels are numbered 00 to 15. Each
channel provides connections for High (H), Low (L) and Guard (G),
although only High and Low are switched. The FET multiplexer module
can switch up to 100,000 connections per second (100 K switches/sec).
The FET multiplexer module consists of a component assembly and a
terminal module. There are three different terminal modules, one for each
of the following applications: HP E1351A 16-Channel FET Multiplexer
Module, HP E1353A 16-Channel Thermocouple FET Multiplexer Module,
and HP E1352A 32-Channel Single-Ended FET Multiplexer Module. The
component assembly is the same for all three applications. For information
on the 32-Channel Single-Ended FET Multiplexer Module, see the
HP E1352A User’s Manual.
The component assembly contains the VXIbus interface, the FET switches,
the analog bus connector and the digital bus. The terminal modules provide
connection points for the individual channels, as well as monitoring points
for the tree terminals and the direct terminals. The FET multiplexer module
can be externally triggered from the VXIbus backplane or through the
digital bus handshake lines on the front of the component assembly.
Chapter 1
Getting Started with the HP E1351A/53A
11
For high-speed operation (100 K switches/sec.) the scanning list is
automatically downloaded into RAM on the multiplexer module.
Triggering for channel advance is from the two handshake lines on the
digital bus. The scanning operation does not require any intervention from
the mainframe CPU. This only applies for switchboxes or scanning
voltmeter configurations that have all FET multiplexer modules. For a
downloaded scan list in switchboxes, the trigger source must be
TRIG:SOUR DBUS or TRIG:SOUR IMM.
Multimeter Connection Points
There are three places where signals on a closed channel can be measured:
analog bus connector, tree terminals and direct terminals. Each of these
provides a different capability for configuring the module.
Analog Bus
Connector
Tree Terminals
Direct Terminals
12
The analog bus connector provides a direct connection between multiple
multiplexer modules and also between a multiplexer module and HP
E1326/E1411 Multimeters. A ribbon cable is used to daisy-chain multiple
multiplexer modules together, and to connect a multimeter to the
multiplexer modules for a scanning voltmeter. The SCAN:PORT ABUS
command automatically closes the appropriate tree isolation switches to
route closed channels to the analog bus. This command must be executed in
a switchbox configuration. A scanning voltmeter automatically configures
the multiplexer for the analog bus connector.
Tree terminals provide an external connection point through the terminal
modules for the signals which are on the analog bus lines. Tree terminals
are the recommended connection points for connecting stand-alone
multimeters and external current sources for 4-wire resistance
measurements.
The 16 channels are separated into two banks, Bank 0 and Bank 1. When a
channel is closed, that channel is connected to a Bank Common. Channels
00 to 07 are on Bank 0 Common and channels 08 to 15 are on Bank 1
Common. The terminal module has connection points for the direct
terminals, where you can measure signals on the respective Bank
Commons. The banks can be isolated from each other, from the analog bus
connector, and from the tree terminals with the A and B tree isolation
switches.
Getting Started with the HP E1351A/53A
Chapter 1
Figure 1-1. FET Multiplexer Module Block Diagram
Chapter 1
Getting Started with the HP E1351A/53A
13
Switchbox and Scanning Voltmeter Configurations
A VXIbus instrument is a module or group of modules which perform a
specified function. For the HP E1300/01 mainframe, the first module in an
instrument must have a logical address which is evenly divisible by 8 (16,
24, 112), and the rest of the modules in the instrument are numbered
consecutively. The instrument’s secondary address is the whole number
equal to the logical address divided by 8 (for a logical address of 16, 17,
18,…23, the secondary address is 02). For instrument definition in other
mainframes, see the mainframe manual. If an instrument consists of only
multiplexer modules, it is a switchbox configuration. If a multiplexer
module(s) is combined with a multimeter to form an instrument, that is a
scanning voltmeter configuration.
Switchbox
1
A switchbox is a multiplexer module or group of multiplexer modules
which form a single instrument. A switchbox can be connected to a
multimeter which is a different VXIbus instrument, to an HP-IB1 controlled
multimeter, or to a stand-alone multimeter. The switchbox and the
multimeter have different secondary addresses. Separate configuration
commands must be sent to the switchbox and to the multimeter. The
following program illustrates the different addresses and the configuration
commands required. The HP-IB interface select code is 7, and the
mainframe address is 09. The multiplexer has an instrument address of 24,
so its secondary address is 03. The multimeter is HP-IB controlled, and has
a primary address of 22.
10
OUTPUT 722;"TRIG EXT;DC 10"
!Sets multimeter to external trigger
and to measure DC volts
20
OUTPUT 70903;"OUTP ON"
!Enables "Trig Out" port
30
OUTPUT 70903;"TRIG:SOUR BUS" !Sets switchbox to receive Bus
triggers
40
OUTPUT 70903;"SCAN:MODE VOLT"!Set up switchbox for voltage
measurements
50
OUTPUT 70903;"SCAN:PORT ABUS"!Closes the appropriate tree
isolation switches while scanning,
automatically makes connection to
the analog bus and tree terminals.
60
OUTPUT 70903;"ARM:COUN 2"
70
OUTPUT 70903;"SCAN (@100;115)"!Selects the channel list. 100
selects first channel on card 1;
115 selects last channel on card 1
80
OUTPUT 70903;"INIT"
!Close first channel to start
scanning cycle
90
FOR I = 0 TO 15
!Start count loop
!Set for two cycles through the
scan list
100 ENTER 722;A
!Enter reading into variable A
110 PRINT A
!Print reading in variable A
HP-IB is Hewlett-Packard’s implementation of IEEE Std 488.1-1978
14
Getting Started with the HP E1351A/53A
Chapter 1
120 TRIGGER 70903
!Trigger the switchbox to advance
the channel list
130 NEXT I
!Increment count
140 END
Scanning Voltmeter
When the multiplexer(s) is combined with a multimeter to form a single
instrument, they become a virtual instrument, a scanning voltmeter. The
multiplexer(s) and the multimeter have the same secondary address. The
multimeter automatically configures the multiplexer, so the SCAN:MODE,
SCAN:PORT and TRIG:SOUR commands are not required. Channel
advance is from the digital bus handshake lines, so the count loop is not
required. The ARM:COUN command does not apply to downloaded scan
lists, so you cannot specify the number of cycles through the scan list. You
can, however, specify INIT:CONT ON for continuous scanning through the
scan list.
10
DIM Rdgs(1:16)
!Dimension an array for 16
readings
20
OUTPUT 70903;"*RST"
!Reset instrument
30
OUTPUT 70903;"MEAS:VOLT:DC? (@100:115)"
!Configure instrument
40
ENTER 70903;Rdgs(*)
!Enter readings into array
50
PRINT Rdgs(*)
!Print results
60
END
Digital Bus and Triggering
The HP E1351A/E1353A can be triggered for channel advance from the
VXIbus backplane or through the digital bus handshake cable on the front
of the component assembly. Backplane triggering can come from HP-IB
computer commands over the HP-IB Bus or from the HP E1300/1301
Mainframe "Event In" port. Digital bus triggering uses two handshake
lines; channel advance and channel closed. Channel advance (input to
multiplexer) triggers an advance, and channel closed (output from
multiplexer) signifies advance completed.
The HP E1326B Multimeter has a digital bus port on the face plate, and
connects to the multiplexer with the digital bus cable (see Figures 2-10 and
2-11). To connect other multimeters for digital bus triggering, you must
prepare a custom cable. Use a connector like the one on the digital bus
cable (HP part number E1300-61611). Connect the measurement complete
port from the multimeter to the channel advance pin, and the external trigger
to the channel closed pin. Connect the grounds for both signals to the
digital bus ground (second pin from right). You can use this cable to
connect an external multimeter to a switchbox, and then use TRlG:SOUR
DBUS (digital bus triggering). You can also order a custom cable with
BNC to digital bus connectors, HP part number E1411-80001. See Figure
2-11 for more information on multiplexer-to-multiplexer and
multiplexer-to-multimeter connections.
Chapter 1
Getting Started with the HP E1351A/53A
15
Figure 1-2. Custom Cable for Digital Bus Triggering
Programming Language
The examples in this manual use the Standard Commands for
Programmable Instruments (SCPI) commands, Hewlett-Packard BASIC and
an HP 9000 Series 200/300 computer over the HP-IB. Chapter 5 contains
information on SCPI command format. Appendix B contains details on the
registers for register-based programming.
Initial Operation
Use the following program to verify initial multiplexer operation by closing
a channel and querying channel closure. The computer interfaces to the
mainframe with the Hewlett-Packard Interface Bus (HP-IB). The HP-IB
interface select code is 7, and the mainframe address is 09. The multiplexer
has an instrument address of 24, so its secondary address is 03.
This 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
channel is closed, a returned "0" designates an open channel.
16
10
OUTPUT 70903;"*RST"
!Opens all channels
20
OUTPUT 70903;"CLOS (@102)"
!Close channel 02 on card 1
30
OUTPUT 70903;"CLOS? (@102)" !Query channel 02 state
40
ENTER 70903;Value
!Enter results into variable called
Value
50
PRlNT Value
!Display result
60
END
Getting Started with the HP E1351A/53A
Chapter 1
Chapter 2
Configuring the HP E1351A/53A FET
Multiplexer Modules
Using This Chapter
This chapter shows how to configure the 16-Channel FET Multiplexer
Modules, how to connect external wiring and how to connect multimeters.
This chapter contains the following sections:
•
•
•
•
•
•
•
•
•
•
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiplexer Card Numbers . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting the Interrupt Line Number . . . . . . . . . . . . . . . . . . .
Setting the Card ID Switch . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Signal Conditioning Components/Current
Shunts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring a Terminal Module . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Multimeters and Signal Generators . . . . . . . . . .
Analog Bus and Digital Bus Cables . . . . . . . . . . . . . . . . . . .
Page 17
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Page 20
Page 21
Page 22
Page 23
Page 24
Page 25
Page 26
Page 27
Warnings and Cautions
Warning
SHOCK HAZARD. Only service-trained personnel who are
aware of the hazards involved should install, remove, or
configure the multiplexer modules. Before you install any
module, disconnect AC power from the mainframe and from
user wiring.
Caution
MAXIMUM VOLTAGE/CURRENT. The maximum voltage that
may be applied between High (H), Low (L), and Guard (G)
terminals is 15 V dc or 10.6 V rms (15 V peak). The maximum
current is 1 mA 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.
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
17
Multiplexer Card Numbers
HP plug-in modules installed in an HP VXIbus mainframe are treated as
independent instruments each having a unique secondary HP-IB address.
An instrument may be composed of a single plug-in module or multiple
plug-in modules. The card number identifies the module within a
switchbox or scanning voltmeter configuration. The multiplexer module
with the lowest logical address is always card number 01. The multiplexer
module with the next successive address is 02, and so on. Figure 2-1
illustrates the card numbers and logical addresses of typical single-module
switchboxes. Figure 2-2 illustrates the card numbers and logical addresses
of a typical multiple-module switchbox. Figure 2-3 illustrates the card
numbers and logical addresses of a typical multiple-module scanning voltmeter.
Figure 2-1. Card Numbers for Single-Module Switchboxes
Figure 2-2. Card Numbers for Multiple-Module Switchbox
18
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Figure 2-3. Card Numbers for Scanning Voltmeter
The logical addresses noted in Figures 2-1, 2-2, and 2-3 apply to modules
installed in an HP 75000 Series B Mainframe (HP Model Number
E1300A/E1301A) or in a mainframe with an HP E1405/1406 Command
Module. See the HP 75000 Series B Installation and Getting Started Guide
or the appropriate HP Command Module Manual for more information on
switchboxes and scanning voltmeter configurations, and logical addressing.
For uses in other systems or mainframes, see the appropriate manuals.
Setting the Address
Switch
The logical address switch (LADDR) factory setting is 112. You may have
changed the switch setting during module installation. Valid address values are
from 1 to 255. Refer to the HP 75000 Series B System Installation and Getting
Started Guide or the appropriate HP Command Module Manual for addressing
information. Otherwise, refer to Figure 2-4 to reset the factory setting.
Figure 2-4. Setting the Logical Address Switch
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
19
Selecting the Interrupt Line Number
The multiplexer module generates interrupts at the end of a downloaded
scan list. The interrupt line number switch determines which backplane
IRQ line will be used. Different mainframes and resource managers
recognize different backplane IRQ lines. The interrupt line number must be
set to the line number your system is programmed to recognize. Refer to
your mainframe manual.
Refer to Figure 2-5 to change the interrupt lines. Valid line numbers are
from 1 to 7. Set the interrupt line number to the mainframe interrupt
handler number.
Figure 2-5. Setting the Interrupt Line Number
20
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Setting the Card ID Switch
The multiplexer module can be an HP E1351A, HP E1352A or HP E1353A
depending on which terminal module is installed. With a normal
connection, the terminal module will automatically configure the module
for the appropriate model. To identify a module without a terminal module,
set the Card ID switch as shown in Figure 2-6. The ID numbers are:
Model
Value
Configuration
HP E1351A
0
all pins open
HP E1352A
8
pin 3 closed
HP E1353A
2
pin 1 closed
For normal connections, leave the switch at the factory setting which is all
pins open.
Figure 2-6. Card ID Switch
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
21
Connecting User Inputs
The 16-Channel FET consists of a component module and a terminal
module. If the terminal module is not desired, Figure 2-7 shows the front
panel and the module’s connector pin-out which mates to the terminal
module.
Figure 2-7. 16-Channel FET Multiplexer Connector Pin-out
22
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Adding Signal Conditioning Components/Current Shunts
The multiplexer module’s terminal module allows you to add components
on each channel for the following:
– Low-Pass Filters
– Attenuators
– Current Shunts (for current measurements using a voltmeter)
Figure 2-8 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.
Figure 2-8. Signal Conditioning Components/Current Shunts
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
23
Connecting Field Wiring
Leads for the individual channels are connected through the channel
terminals on the terminal modules. Multimeters and signal generators can
be connected to the direct terminals or tree terminals on the terminal
modules. Figure 2-9 shows the terminal module channel terminals for the
16-Channel FET Multiplexer Module (HP E1351A) and the 16-Channel
Thermocouple FET Multiplexer Module (HP E1353A).
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 2-9. FET Multiplexer Modules Terminal Module
24
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Wiring a Terminal Module
The following illustrations show how to connect field wiring to the terminal
module.
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
25
Connecting Multimeters and Signal Generators
Figure 2-10 shows how to connect the analog bus connector and the digital
bus handshake cable between multiple multiplexer modules and the HP
E1326B Multimeter. Use the cables shipped with the multiplexer modules
to make the connections.
Stand-alone multimeters and signal generators can also be connected to the
tree terminals or the direct terminals. Connections to the tree terminals and
the direct terminals are made on the terminal modules. If the multimeter
has "Voltmeter Complete" and "External Trigger" ports that use an open
collector TTL pulse, you can use a custom cable to connect it to the digital
bus for triggering (see “ Digital Bus and Triggering” in Chapter 1).
Figure 2-10. Analog Bus and Digital Bus Connections
26
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Analog Bus and Digital Bus Cables
Figure 2-11 shows analog bus and digital bus cables for
multiplexer-to-multiplexer and multiplexer-to-multimeter connections.
Figure 2-11. Analog Bus and Digital Bus Cables
Chapter 2
Configuring the HP E1351A/53A FET Multiplexer Modules
27
Notes
28
Configuring the HP E1351A/53A FET Multiplexer Modules
Chapter 2
Chapter 3
Using the HP E1351A/53A FET Multiplexer
Modules
Using This Chapter
This chapter uses some typical examples to show how to use the
16-Channel FET and 16-Channel Thermocouple FET Multiplexer Modules.
Refer to Chapter 4, “Understanding the HP E1351A/53A FET
Multiplexers” for further information. This chapter contains the following
sections:
• Selecting Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
• Multiplexer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31
• Connecting Switchbox Channels to Direct
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
• Connecting Switchbox Channels to Tree Terminals for
•
•
•
•
•
•
Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning a Range of Switchbox Channels . . . . . . . . . . . . . .
Downloading a Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning a Switchbox without a Downloaded
Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning a Switchbox with a Downloaded
Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning Voltmeter Configuration with
HP E1326B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measuring Temperature Using Thermocouples
(HP E1353A Module only) . . . . . . . . . . . . . . . . . . . . . .
Page 34
Page 36
Page 39
Page 40
Page 41
Page 42
Page 43
Selecting Channels
Individual channels within a module or multiple-module instrument are
selected with the SCAN <channel_list> or OPEN and CLOSe
<channel_list> commands. OPEN and CLOSe <channel_list> immediately
opens/closes the specified channel. The SCAN <channel_list> command
creates a scanning list which can be downloaded into RAM on each module.
The INITiate command closes the first channel on the scan list, and the
selected trigger mode advances the rest of the channels.
The FET Multiplexer Module uses break-before-make logic so that a closed
channel is opened before the next channel is closed. Only one channel can
be closed at any given time on the FET multiplexer. The only exception is
in SCAN:MODE FRES (4-wire resistance measurements). You can,
however, have a channel closed on two different modules in the same
instrument.
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
29
To address specific channels within a multiplexer module in a switchbox or
scanning voltmeter configuration, you must send the appropriate SCPI
command string with a specified card number (cc) and channel number
(nn). The card number refers to the multiplexer module within a switchbox
or scanning voltmeter configuration. The multiplexer module with the
lowest logical address in a VXIbus instrument is card number 01, and the
next consecutively numbered multiplexer module is card number 02. If you
have more than one switchbox or scanning voltmeter configuration, the card
numbering sequence starts at 01 for each configuration. A channel address
is, therefore, a four digit number (ccnn). For channel 07 on card 02 the
address is 0207. You can delete leading zeros, so 207 is also a valid
channel address. 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.
The OPEN and CLOSe commands should only be used with the
single-channel format and for one unique application of the
multiple-channel format. You can close a channel on two different cards in
the same instrument (e.g., 102 and 208) at the same time. You cannot close
two channels on the same card at the same time (102 and 108). Closing a
channel automatically opens all other channels on that card.
30
CLOSe (@102,208,309)
Closes 02 on card 1, 08 on card 2
and 09 on card 3.
CLOSe (@103,204)
Opens 102 and 208, closes 103 and
204; 309 left closed.
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Multiplexer Commands
The following commands are covered in Chapter 3. For a complete list and
description of commands see Chapter 5, “Command Reference”.
Table 3-1. Matrix Commands Used in Chapter 3
Command
Description
ARM:COUNt <number>
Selects number of scanning cycles for a switchbox only. Does not
apply to downloaded scan lists.
INITiate[:IMMediate]
Channel advance for TRIGger:SOURce BUS | HOLD.
INITiate:CONTinuous <mode>
<mode> = 1 | 0 | ON | OFF
Enables/disables continuous scanning cycles.
[ROUTe:]CLOSe <channel_list>
Closes specified channels.
[ROUTe:]CLOSe? <channel_list>
Queries mainframe for channel closure.
[ROUTe:]OPEN <channel_list>
Opens specified channels.
[ROUTe:]SCAN <channel_list>
Closes all channels in channel list one at a time. Previous channel
opens before next channel closes.
[ROUTe:]SCAN:MODE FRES
Closes paired channel relays (for example, channels 01 and 09)
during 4-wire ohms measurements.
[ROUTe:]SCAN:PORT ABUS
Automatically closes the tree isolation switches.
TRIGger[:IMMediate]
Channel advance for TRIGger:SOURce BUS | HOLD.
TRIGger:SOURce <source>
<source> = EXT | BUS | DBUS | IMM
Selects the trigger source as EXTernal, HP-IB BUS, Digital BUS,
or IMMediate.
NOTE: The commands with brackets ([ ]) are implied and are not shown in this chapter.
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
31
Connecting Switchbox Channels to Direct Terminals
The direct terminals provide direct access to closed channels. There is a
direct terminal for each bank, Bank 0 and Bank 1. Closing any channel in
Bank 0 (channels 00 to 07) connects the channel to the Bank 0 direct
terminal. Closing any channel in Bank 1 (channels 08 to 15) connects the
channel to the Bank 1 direct terminal. You can isolate the two banks from
each other, and from the analog bus connector and tree terminals, with the
SCAN:PORT NONE command. This command opens the A and B tree
isolation switches. Figure 3-1 shows how to connect channels 02 and 09 of
a single module to their respective direct terminals. Only one channel can
be closed at a time.
SCAN:PORT NONE
Opens Tree Isolation Switches.
CLOSe (@102)
Closes channel 02 on card 01.
CLOSe (@109)
Opens 02 then closes 09.
Figure 3-1. Connecting Channels 02 and 09 to their Respective
Direct Terminals
32
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Comments
Isolation. The direct terminals provide a more accurate measurement than
the tree terminals or the analog bus connector as the signal does not have to
travel through the extra FET switches. The SCAN:PORT NONE command
opens the tree isolation switches and isolates the direct terminals from the
tree terminals and the analog bus connector.
The default value of SCAN:PORT is NONE for reset and power-on. If you
have not specified a different SCAN:PORT since reset or power-on, you do
not need to execute this command. You can also use the direct terminals
with SCAN:PORT ABUS. The signal for a given closed channel will then
be available at the direct terminal for that bank, the A tree terminal and the
analog bus connector.
Closing Channels. The FET multiplexer module only allows one channel
per card to be closed at a time, except for SCAN:MODE FRES (4-wire
resistance measurements) where two channels are closed. You can close a
channel on two different cards in the same instrument at the same time.
The SCAN <channel_list> command allows you to specify a list of channels
to be closed sequentially. The FET multiplexer module uses a
break-before-make procedure, so closed channels are opened before the
next one on the list is closed. The channels are advanced according to the
TRIGger mode selected.
Query Open/Closed Channels. The CLOSe? <channel_list> and OPEN?
<channel_list> commands determine if the channel(s) in the channel list are
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 channel 109 is closed, execute:
CLOS? (@109)
A response of "1" indicates the channel is closed, and a "0" indicates the
channel is open. The reverse is true for the OPEN? <channel_list>
command. The response for the OPEN? and CLOSe? commands are:
CLOS?
OPEN?
1 = Closed
0 = Open
1 = Open
0 = Closed
To find out which channel on a card is closed, use a channel list for the card.
CLOS? (@100:115)
and enter the response into a string variable. If channel 09 is closed, the
response will be:
0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0
NOTE: You must read the response after sending a query command or
the switchbox will generate an error.
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
33
Connecting Switchbox Channels to Tree Terminals for
Making Measurements
Connect external multimeters to the A tree terminal. The SCAN:PORT
ABUS command closes the appropriate FETs on the A and B tree isolation
switches, so that the channels that are closed are connected to both the
analog bus connector and the tree terminals. The A tree terminal is
connected to the H, L, and G lines, and the B tree terminal is connected to
the I +, I- and G lines. Figure 3-2 shows how to connect multimeters to
measure channel 02 and channel 09.
SCAN:PORT ABUS
Enables tree isolation switches.
CLOS (@102)
Close channel 02 on card 01.
CLOS (@109)
Open 02, close 09.
Figure 3-2. Closing Channels 02 and 09 for a Voltage Measurement
34
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Example: Connect
Channels 02 and 10 to
Tree Terminals for
4-Wire Ohms
Measurement
The SCAN:MODE FRES command separates Bank 0 and Bank 1 for 4-wire
resistance measurements or other stimulus/response testing. Current or
signals are connected to the B tree terminal and go out through a channel on
one bank. The voltage signal response comes in through a channel on the
other bank and goes to the A tree terminal and the analog bus connector.
The current source and voltage response must be on channels that are eight
numbers apart (for example, 02 and 10, 15 and 07). You only need to
specify the channel that the voltage reading is on as the FET multiplexer
automatically closes the corresponding channel eight numbers away. Figure
3-3 shows a current source on channel 10 and the voltage reading on
channel 02.
SCAN:MODE FRES
Isolates Bank 0 from Bank 1.
CLOSe (@102)
Closes channels 02 and 10. 02 is
routed to A tree terminal and 10 is
routed to B tree terminal.
Figure 3-3. Connecting Channels 02 and 10 for 4-Wire Ohms Measurement
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
35
Scanning a Range of Switchbox Channels
You can scan a range of channels of a switchbox consisting of single or
multiple multiplexer modules. Scanning involves sequentially closing each
channel on a range of specified channels. The selected TRIGger mode
determines when the channel closure will advance. During scanning, the
FET which was previously closed opens before the next FET closes.
You can use any of the TRIGger modes to advance the channel list.
TRIGger:SOURce EXTernal requires an external trigger source to be connected
to the HP E1300/1301 Mainframe "Event In" port. For computer controlled or
HP-IB triggering (TRIGger or *TRG) use TRIGger:SOURce BUS. The
OUTput ON command enables the mainframe’s "Trig Out" port to synchronize
multimeters when not in the TRIGger:SOURce DBUS | IMM modes.
For the fastest scan rate (up to 100 K switches/sec.) use TRIGger:SOURce
DBUS. Use a custom cable (see “ Digital Bus and Triggering” on page 15)
to connect the multimeter handshake lines (Voltmeter Complete and
External Trigger) to the multiplexer digital bus.
Example: Making
Voltage Measurements
by Scanning
Figures 3-4 and 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:
• A Tree Terminals of each terminal module connect to each other and
to the multimeter in Figure 3-5. To connect the A tree terminals to
each other, use either the analog bus cables (shown in Figures 2-10
and 2-11) or wire the terminals together between the terminal
modules.
• HP-IB Bus trigger command advances the switchbox channel list.
• HP E1300A/E1301A Mainframe’s "Trig Out" pulse synchronizes the
switchbox with the multimeter.
• Multimeter HP-IB select code is 7 and primary address is 22.
• Switchbox HP-IB select code is 7, the HP-IB primary address is 09,
and the HP-IB secondary address is 14.
• Computer is an HP Series 200/300 Computer with HP BASIC using
HP-IB.
Enter and Execute:
36
10
OUTPUT 722;"TRIG EXT;DC 10"
!Sets multimeter to external
triggers and to measure dc volts
20
OUTPUT 70914;"OUTP ON"
!Enables "Trig Out" port
30
OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus
triggers
40
OUTPUT 70914;"SCAN:MODE VOLT"!Setup switchbox to measure
voltage
50
OUTPUT 70914;"SCAN:PORT ABUS"!Closes the appropriate tree
isolation switches while scanning;
automatically makes connection to
the analog bus and tree terminals.
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
60
OUTPUT 70914;"SCAN (@100:215)"!Selects the channel list; 100
selects the first channel of module
#1 and 215 selects the last channel
of module #2.
70
OUTPUT 70914;"INIT"
!Close first channel to start the
scanning cycle
80
FOR I = 1 TO 32
!Start count loop
90
ENTER 722;A
!Enter reading into variable A
100 PRINT A
!Print reading in variable A
110 TRIGGER 70914
!Trigger the switchbox to advance
the scan list
120 NEXT I
!Increment count
130 END
Figure 3-4. Scanning Channels 100 to 215 of a Two-Module Switchbox
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
37
Figure 3-5. Mainframe to Multimeter Connection for Synchronization
Example: Making
2-Wire Ohms
Measurements by
Scanning
Use the same setup shown in the first program example in this section,
except the current source from the multimeter must be connected to the B
tree terminal. Change the commands in lines 10 and 40 to the following:
10
OUTPUT 722;"TRIG EXT;OHM"
40
OUTPUT 70914;"SCAN:MODE RES"!Closes the appropriate tree
isolation switches
!Set multimeter to 2-wire ohms
This command, when used with SCAN:PORT ABUS and SCAN <channel_list>
commands, automatically closes the channels defined in the channel list, along
with the appropriate tree isolation switches. The current source is
superimposed on the channel being measured.
Example: Making
4-Wire Ohms
Measurements by
Scanning
38
This type of measurement requires a paired channel closure (for example,
channels 02 and 10). Use the SCAN:MODE FRES command to
automatically close the paired channels to the selected channels defined in
the SCAN <channel_list> command. Connect High and Low to a Bank 0
channel and High and Low to the paired channel eight numbers away. Use
only one of the channels of the channel pairs in the channel_list. Change
the commands in lines 10, 40 and 60 to the following:
10
OUTPUT 722;"TRIG EXT;OHM"
40
OUTPUT 70914;"SCAN:MODE FRES"!Closes the appropriate tree
isolation switches
60
OUTPUT 70914;"SCAN (@100:107,200:207)"
Using the HP E1351A/53A FET Multiplexer Modules
!Set multimeter to 4-wire ohms
Chapter 3
Example: Making
Multiple Scans
The ARM:COUNt <number> command selects multiple scanning cycles for
switchboxes with non-downloaded scans. It does not apply when the
TRIGger:SOURce is DBUS or IMMediate.
Add the command before the SCAN <channel_list> in the first program
example in this section. When the last channel in a channel list is closed,
the pointer is reset back to the beginning of the channel list. The next
trigger opens the last channel and closes the first one. This continues for the
specified number of cycles.
Example: Making
Continuous Scans
Comments
59
OUTPUT 70914;"ARM:COUN 10"
60
OUTPUT 70914;"SCAN (@100:215)"!Sets scan list
80
FOR I = 1 TO 320
!Enables 10 scanning cycles
The INITiate:CONTinuous 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:
59
OUTPUT 70914;"INIT:CONT ON"
60
OUTPUT 70914;"SCAN (@100:215)"!Sets scan list
80
FOR I = 1 TO X
!Enables continuous scanning
cycles
!Set the number of measurements
desired
Scanning consists of six steps:
•
•
•
•
•
•
Connecting the multimeter to the switchbox
Selecting the SCAN:MODE
Selecting the SCAN:PORT
Selecting the TRIGger:SOURce
Specifying the SCAN <channel_list>
Starting the scan (INIT or TRIG[:IMMediate])
Downloading a Scan List
The FET Multiplexer Module is primarily designed to be used as a
high-speed scanning switchbox or scanning voltmeter. To enable it to make
100,000 connections per second, the SCAN <channel_list> scanning list is
downloaded into RAM on the module. This download takes place
automatically when you use TRIGger:SOURce DBUS or TRIGger:SOURce
IMM. For a multiple-module switchbox, the entire scanning list is
downloaded to each module. The channels are advanced to the next channel
in the channel list without any direct intervention by the mainframe CPU
during the scan.
The scan list is not downloaded for a switchbox or scanning voltmeter that
combines both FET and relay multiplexer modules, or for
TRIGger:SOURce BUS | EXT | HOLD. The channel closings are controlled
by the mainframe CPU. Also, the ARM:COUNt <number> command does
not apply to downloaded scan lists. You can use INITiate:CONTinuous ON
for continuous scanning with downloaded scan lists.
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
39
Scanning a Switchbox without a Downloaded Scan List
This example shows a FET switchbox connected to a multimeter with the
analog bus cable. The switchbox and multimeter are separate VXIbus
instruments. The multimeter has a secondary address of 03, and the
switchbox has a secondary address of 04. The multiplexer is triggered by
the *TRG command. OUTPut ON is enabled, and the multimeter is
triggered by the OUTPut ON trigger to its "External Trigger" port. The
following program illustrates the procedures:
10
DIM Rdgs(1:16)
!Dimension array to store readings
20
OUTPUT 70903;"*RST;*OPC?"
!Clear the multimeter; *OPC?
ensures reset is completed before
program continues
30
ENTER 70903;A
40
OUTPUT 70903;"*CLS"
50
OUTPUT 70904;"*RST"
60
OUTPUT 70904;"*CLS"
70
OUTPUT 70903;"CONF:VOLT:DC 58.1"!Configure the multimeter
80
OUTPUT 70903;"TRIG:SOUR EXT" !External trigger source
90
OUTPUT 70903;"TRIG:COUN 16"
100 OUTPUT 70903;"INIT"
!Reset multiplexer
!Set for 16 triggers
!Initialize multimeter wait for
trigger
110 OUTPUT 70904;"TRIG:SOUR BUS" !Trigger on *TRG command
120 OUTPUT 70904;"SCAN:MODE VOLT"!Configure for voltage
130 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus
140 OUTPUT 70904;"SCAN (@100:115)"!Enter scan list
150 OUTPUT 70904;"OUTP ON"
!Enable mainframe trig out port
160 OUTPUT 70904;"INIT"
!Close first channel
170 FOR I = 1 TO 16
!16 channels
180 OUTPUT 70904;"*TRG"
!Trigger for channel advance
190 WAIT .25
!Allow time for measurement
before next advance
200 NEXT I
!Increment counter
210 OUTPUT 70903;"FETC?"
!Multimeter retrieves readings
from mainframe memory when
scan completes
220 ENTER 70903;Rdgs(*)
!Put readings in array
230 PRINT Rdgs(*)
!Print
240 END
40
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Scanning a Switchbox with a Downloaded Scan List
This example shows a FET switchbox connected to multimeter with the
analog bus cable and the digital bus cable. The switchbox and multimeter
are separate VXIbus instruments. The multimeter has a secondary address
of 03, and the switchbox has a secondary address of 04. The triggering is
through the digital bus handshake lines, so the scan list is downloaded. The
following program illustrates the procedures:
10
DIM Rdgs(1:16)
!Dimension array to store readings
20
OUTPUT 70903,"*RST,*OPC?"
!Clear the multimeter; *OPC?
ensures reset is completed before
program continues
30
ENTER 70903;A
40
OUTPUT 70903;"*CLS"
50
OUTPUT 70904;"*RST"
60
70
OUTPUT 70904;"*CLS"
OUTPUT 70903;"CONF:VOLT:DC 58.1"!Configure the multimeter
80
OUTPUT 70903;"TRIG:SOUR EXT" !External trigger source
90
OUTPUT 70903;"TRIG:COUN 16"
100 OUTPUT 70903;"INIT"
!Reset multiplexer
!Set for 16 triggers
!Initialize multimeter, wait for
trigger
110 OUTPUT 70904;"STAT:OPER:ENAB 256"
!Enable operation complete bit
120 OUTPUT 70904;"TRIG:SOUR DBUS"!Digital bus triggers
130 OUTPUT 70904;"SCAN:MODE VOLT"!Configure for voltage
140 OUTPUT 70904;"SCAN:PORT ABUS"!Enables analog bus
150 OUTPUT 70904;"SETT:TIME MAX,(@100)"
!Delay for signal to settle before
multiplexer enables channel closed
pulse
160 OUTPUT 70904;"SCAN (@100:131)"!Enter scan list
170 OUTPUT 70904;"INIT"
!Close first channel
180 OUTPUT 70903;"FETC?"
!Multimeter retrieves readings
from mainframe memory when
scan completes
190 ENTER 70903;Rdgs(*)
!Put readings in array
200 PRINT Rdgs(*)
!Print
210 END
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
41
Scanning Voltmeter Configuration with HP E1326B
This example shows an HP E1326B Multimeter and an HP E1351A/
E1353A Multiplexer combined into a single VXIbus instrument, a scanning
voltmeter. The secondary address for the scanning voltmeter is 03. Both
the analog bus connector and the digital bus connector are used. Once the
scanning starts, there is no intervention from the mainframe CPU. The scan
list is in RAM on the multiplexer, and the two handshake lines on the digital
bus control the triggering.
The following program illustrates the procedures:
10
DIM Rdgs(1:16)
!Dimension array to store readings
20
OUTPUT 70903;"*RST;*OPC?"
!Clear the multimeter; OPC?
ensures reset is completed before
program continues
30
OUTPUT 70903;"*CLS"
40
OUTPUT 70903;"CONF:VOLT:DC (@100:115)"
!Configures multimeter; also
automatically configures
multiplexer for SCAN:MODE,
SCAN:PORT and TRIG:SOUR
50
OUTPUT 70903:"INIT"
!Close first channel, start scan
60
OUTPUT 70903;"FETC?"
!Retrieve readings from mainframe
70
80
90
ENTER 70903;Rdgs(*)
PRINT Rdgs(*)
END
Figure 3-6. Connecting the Analog Bus and Digital Bus Cables
42
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Measuring Temperature Using Thermocouples
(HP E1353A Module only)
The thermocouple terminal module automatically configures the HP
E1353A FET Multiplexer Module for thermocouple readings. The
multimeter measures the resistance of a thermistor on the terminal module
to provide a reference temperature. This reference temperature is used to
compensate for the change in temperature between the thermocouple
(desired measurement) and the terminal temperature (see “Comments” later
in this section).
Setup for
Measuring
Thermocouple
Temperature using
an External
Multimeter
Figure 3-7 shows how to set up channel 01 of a single module switchbox to
measure temperature using a thermocouple and an external multimeter.
Figure 3-7. Temperature Measurement Using a Thermocouple
Chapter 3
Using the HP E1351A/53A FET Multiplexer Modules
43
Comments
Measuring Temperature with the HP El326B/El411B Multimeters. The
HP E1326B/E1411B 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 HP E1326B/E1411B Multimeter User’s Manual.
Thermocouple Compensated Measurements. The HP E1353A FET
Multiplexer makes thermocouple compensated measurements. Thermocouple
compensation accounts for the temperature inside the multiplexer terminal
module, which can affect the thermocouple reading. Thermocouple
compensated measurements are made with the HP E1326B/E1411B. More
information on these types of measurements can be found in Hewlett-Packard
Application Note 290, Practical Temperature Measurements.
High-Speed Temperature Measurements. High-speed temperature
measurements can be made by measuring the thermocouple voltage,
compensating the reading, and then converting the voltage to a temperature.
The instrument configuration used for these types of measurements may
include an E1326B/E1411B Multimeter and a FET multiplexer switchbox,
or an external voltmeter used with the FET switchbox. The procedure for
these types of measurements is:
1. Measure the resistance of the thermistor (channel 93) on the
multiplexer terminal module (CLOSe(@cc93)).
2. Measure the thermocouple voltage on the multiplexer channel.
3. Convert the thermistor resistance to a temperature using the
following equation:
t = 1.0 / (A + B * lnr + C * (lnr)3)calculate temperature
t = t - 273.15
convert Kelvin to Centigrade
where:
A = 0.00128463
B = 0.00023625
C = 9.2697E-8
lnr = natural log of the measured thermistor resistance
A, B, and C are the curve-fitting constants for the multiplexer’s
5K thermistor.
4. Convert the thermistor temperature (step 3) to a voltage using the
reference table for the type of thermocouple used.
5. Subtract the voltage (step 4) from the thermocouple voltage
measured in step 2. Convert the difference between the voltages to a
temperature, again using the reference table for the type of
thermocouple used.
6. Add the temperature (step 5) to the thermistor temperature computed
in step 3 to obtain the result of the thermocouple measurement.
44
Using the HP E1351A/53A FET Multiplexer Modules
Chapter 3
Chapter 4
Understanding the HP E1351A/53A FET
Multiplexer Modules
Using This Chapter
This chapter explains techniques to scan the channels of 16-Channel FET
and 16-Channel Thermocouple FET Multiplexer Modules. This chapter
contains the following sections:
• Commands for Scanning Switchbox Channels . . . . . . . . . . . Page 45
• Using Scanning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . Page 45
• Using the Scan Complete Bit. . . . . . . . . . . . . . . . . . . . . . . . . Page 52
Commands for Scanning Switchbox Channels
Scanning multiplexer channels consists of closing a set of channels, one at a
time. The multiplexer has single, multiple, or continuous scanning modes.
See Figure 4-1 for the different commands used in scanning.
Using Scanning Trigger Sources
The TRIGger:SOURce command specifies the source to advance the
channel list. Figure 4-2 shows the different trigger sources. TRIG:SOUR
DBUS uses the digital bus handshake lines. You can use the TRIG[:IMM]
command to immediately advance the channel list while in the TRIG:SOUR
BUS or TRIG:SOUR HOLD mode. (Note that TRIG:SOUR IMM is not the
same as TRIG[:IMM].) To enable the HP E1300/E1301 Mainframe "Trig
Out" port, use the OUTP ON command. The "Event In" mainframe trigger
source is reserved with the TRIG:SOUR EXT command. "Trig Out" and
"Event In" are mainframe resources, and can only be allocated to one
instrument at a time.
Scanning with
External
Instruments
The examples in this chapter show different ways to scan channels of a
switchbox in an HP E1300/E1301 Mainframe. The operation is similar to
other HP VXIbus mainframes with HP command modules that have "Trig
Out" and "Event In" ports. The computer used in the examples is an HP
Series 200/300 used with HP BASIC as the program language. The
computer interfaces with the mainframe over HP-IB. Assumed is an:
•
•
•
•
Chapter 4
HP-IB select code of 7
HP-IB primary address of 09 for the HP E1300/E1301 Mainframe
HP-IB primary address of 22 for the HP 3457A Multimeter
HP-IB secondary address of 14 for the multiplexer module
Understanding the HP E1351A/53A FET Multiplexer Modules
45
Figure 4-1. Scanning Commands
46
Understanding the HP E1351A/53A FET Multiplexer Modules
Chapter 4
Handshake Triggering (TRIG:SOUR BUS)
Uses digital bus on faceplate of multiplexer
module. Channel Advance and Channel
Closed continuously handshake with
Voltmeter Ready and Voltmeter Complete until
scanning list has completed specified number
of cycles.
Advancing Scan (TRIG[:IMM]
Immediate Triggering (TRIG:SOUR IMM)
This command advances the scan list
when in TRIG:SOUR HOLD or
TRIG:SOUR BUS. Advances the scan
list one channel per command.
Sets immediate internal triggering. The scan
list is automatically advanced through the
scan list. Due to the high speed of the FET
multiplexer, this mode should be used with
consideration for the capability of the
multimeter. This is the default trigger mode.
Trigger Hold (TRIG:SOUR HOLD)
Prevents execution of triggers until
trigger source is changed. Can use
TRIG[:IMM] command to trigger a
switchbox set to TRIG:SOUR HOLD.
Bus Triggering (TRIG:SOUR BUS)
Defines Trigger source as *TRG or HP-IB
GET command executed over the HP-IB.
The scan list is advanced one channel for
each *TRG or GET command received.
Enabling Trig Out Port (OUTP ON)
External Triggering (TRIG:SOUR EXT)
Trigger source is a user supplied input to
the Event In BNC. Use a +5V
negative-going pulse to trigger.
TRIG:SOUR EXT reserves the Event In
resource so it is not available for any other
instrument in the mainframe.
Generates a +5V negative-going pulse each
time a channel advances. OUTP ON reserves
the Trig Out Port so it is not available for any
other instrument in the mainframe.
As an alternative to OUTP ON, the Channel
Closed on the digital bus also pulses for each
channel closure.
Figure 4-2. Trigger Sources
Chapter 4
Understanding the HP E1351A/53A FET Multiplexer Modules
47
Example: Scanning
with External
Instruments
This example uses the mainframe "Trig Out" port to synchronize the
multiplexers to an HP 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 from its "External
Trigger" port.
The sequence of operation is:
1.
2.
3.
4.
5.
INIT (line 70) closes channel number 100.
The channel closure causes a trigger output from the "Trig Out" port.
The trigger causes the multimeter to make a measurement.
Measurement result is sent to the computer (lines 80 to 100).
TRIGGER command (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"
!Sets multimeter to external trigger
and to measure dc volts
20
OUTPUT 70914;"OUTP ON"
!Enables "Trig Out" port
30
OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus
triggers
40
OUTPUT 70914;"SCAN:MODE VOLT"!Sets switchbox to measure
voltage
50
OUTPUT 70914;"SCAN:PORT ABUS"!Closes the tree isolation switches
60
OUTPUT 70914;"SCAN (@100:115)" !Selects the channel list for
scanning
70
OUTPUT 70914;"INIT"
!Starts scanning cycle
80
FOR I = 1 TO 16
!Start count loop
90
ENTER 722;A
!Enter reading into variable A
100 PRINT A
!Print reading in variable A
110 TRIGGER 70914
!Trigger the switchbox to advance
the channel list
120 NEXT I
!Increment count
130 END
48
Understanding the HP E1351A/53A FET 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 HP 3457A Digital Multimeter. See the
following figure for typical connections.
For this example, use the trigger output pulse of the mainframe’s "Trig Out"
port to trigger the multimeter from 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:
1.
2.
3.
4.
5.
6.
7.
Chapter 4
INIT (line 50) closes channel number 100.
The channel closure causes a trigger output from the "Trig Out" port.
The trigger causes the multimeter to make a measurement.
Measurement result is stored into multimeter memory.
Trigger is output from multimeter’s "Voltmeter Complete" port.
Trigger to "Event In" port advances the channel list to the next channel.
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" !Sets switchbox to receive external
triggers
40
OUTPUT 70914;"SCAN (@100:115)" !Selects the channel list (channels
100 to 115)
50
OUTPUT 70914;"INIT"
60
END
!Enables "Trig Out" port
!Starts scanning cycle
Understanding the HP E1351A/53A FET Multiplexer Modules
49
Example: Scanning
Using Stand-Alone
Multimeter and Digital
Bus Triggering
This example is similar to the previous one except that the multimeter’s
"External Trigger" and "Voltmeter Complete" ports are connected to the
"Channel Closed" and "Channel Advance" on the FET Multiplexer digital bus.
See Chapter 1 for information on making custom digital bus cables. Once the
scanning procedure has been initiated (INIT), the channel closure is advanced
by the handshake lines. The INIT command closes the first channel, and when
the channel is closed, the "Channel Closed" pulses. This is connected to the
"External Trigger" on the multimeter, which triggers a reading. When the
reading is complete, the "Voltmeter Complete" triggers, which pulses the
"Channel Advance". This procedure continues until the end of the scan list.
The sequence of operation is:
1. TRIG:SOUR DBUS selects digital bus triggering.
2. INIT (line 50) closes channel number 100.
3. The channel closure causes a trigger output from the "Channel
Closed" port.
4. The trigger causes the multimeter to make a measurement.
5. Measurement result is stored into multimeter memory.
6. Trigger is output from multimeter’s "Voltmeter Complete" port.
7. Trigger to "Advance Channel" port advances the channel list to the
next channel.
8. Steps 3-7 are repeated for channels 101 through 115.
50
10
OUTPUT 722;"TRIG EXT;DCV;MEM FIFO"
!Sets multimeter to external trigger
to measure dc volts and store
readings
20
OUTPUT 70914;"SCAN:PORT ABUS"!Routes channels to analog bus
connector and A tree terminal
30
OUTPUT 70914;"TRIG:SOUR DBUS"!Sets switchbox to receive external
triggers
40
OUTPUT 70914;"SCAN (@100:115)" !Selects the channel list (channels
100 to 115)
50
OUTPUT 70914;"INIT"
60
END
!Starts scanning cycle
Understanding the HP E1351A/53A FET Multiplexer Modules
Chapter 4
Example: Scanning
Using Scanning
Voltmeter
Configuration and
Digital Bus Triggering
In this example the HP E1326B Multimeter is combined with a FET
multiplexer to form a scanning voltmeter VXIbus instrument. The
multimeter is address 24, and the multiplexer is address 25, so the
instrument secondary address is 03. The analog bus connector and the
digital bus connector are connected between the modules. The
TRIG:SOURce is set for DBUS. This configuration provides the fastest
speed. Consult the HP E1326B/E1411B Multimeter User’s Manual for
further information on multimeter settings. Note that the ARM:COUNt
command does not apply to downloaded scan lists.
The sequence of operation is:
1. The multimeter automatically configures the multiplexer for
SCAN:MODE, SCAN:PORT and TRIGger:SOURce DBUS.
2. INIT closes first channel.
3. The channel closure causes a trigger output from the "Channel
Closed" port.
4. The trigger causes the multimeter to make a measurement.
5. Measurement result is stored into multimeter memory.
6. Trigger is output from multimeter’s "Voltmeter Complete" port.
7. Trigger to "Advance Channel" port advances the channel list to the
next channel.
8. Steps 3-7 are repeated for channels 101 through 115.
Chapter 4
10
DIM Rdgs(1:16)
!Dimension array for readings
20
OUTPUT 70903;"*RST"
!Reset scanning voltmeter
30
OUTPUT 70903;"CONF:VOLT DC (@100:115)"
!Sets multimeter to measure dc volts
40
OUTPUT 70903;"INIT"
!Starts scanning cycle
50
OUTPUT 70903;"FETC?"
!Get the readings
60
ENTER 70903;Rdgs(*)
!Place values in array
70
PRINT Rdgs(*)
!Print values
80
END
Understanding the HP E1351A/53A FET Multiplexer Modules
51
Using the Scan Complete Bit
You can use the Scan Complete Bit (bit 8) in the SCPI Operation Status
Register 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 STAT:OPER? command (refer to the
STATus:OPERation[:EVENt]? command in Chapter 5 for an example).
Note that this is not the same register as the multiplexer Status/Control
Register.
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 HP-IB Serial
Poll or the IEEE 488.2 Common Command *STB? to read the Status
Register. When bit 7 of the status Register is enabled by the *SRE 128
Common Command to assert an HP-IB 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 HP BASIC as the program language. The
computer interfaces with the mainframe over HP-IB. The HP-IB select
code is 7, the HP-IB primary address is 09, and the HP-IB secondary
address is 14.
Example: Scan
Complete Monitor
10
OUTPUT 70914;"*CLS"
20
OUTPUT 70914;"STAT:OPER:ENAB 256"
!Enable Scan Complete Bit to set
bit 7 in Status Register
30
OUTPUT 70914;"*SRE 128"
40
OUTPUT 70914;"TRIG:SOUR EXT" !Set to external trigger mode
50
OUTPUT 70914;"SCAN (@100:115)" !Select channels to be scanned
60
OUTPUT 70914;"INIT"
70
WHILE NOT BIT (SPOLL(70914),7) !Waiting for scan complete
80
PRINT "DO OTHER OPERATION HERE"
!Enter program lines for computer
to do other operations
90
END WHILE
!Clear all switchbox status
structure
!Enable bit 7 of Status Register to
assert SRQ
!Start scanning cycle
100 PRINT "INTERRUPT GENERATED" !Program goes to this line after
interrupt is generated by a
completed scanning cycle
110 END
52
Understanding the HP E1351A/53A FET Multiplexer Modules
Chapter 4
Chapter 5
HP E1351A/53A 16-Channel FET
Multiplexer Command Reference
Using This Chapter
This chapter describes Standard Commands for Programmable Instruments
(SCPI) commands and summarizes IEEE 488.2 Common (*) Commands
applicable to the 16-Channel FET and 16-Channel Thermocouple FET
Multiplexer Modules. This chapter contains the following sections:
•
•
•
•
Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . .
IEEE 488.2 Common Commands . . . . . . . . . . . . . . . . . . . . .
Command Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 53
Page 55
Page 76
Page 77
Command Types
Commands are separated into two types: IEEE 488.2 Common Commands
and SCPI Commands.
Common
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 three or four characters in length, always begin with the asterisk
character (*), and may include one or more parameters. The command
keyword is separated from the first parameter by a space character. Some
examples of Common Commands are shown below:
*RST
SCPI Command
Format
*ESR 32
*STB?
The SCPI commands perf`orm 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 VOLT
[ROUTe:] is the root command, CLOSe and SCAN are second-level
commands with <channel_list> as a parameter, and MODE is a third-level
command with the parameter VOLT.
Chapter 5
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
53
Command Separator
A colon (:) always separates one command from the next lower level
command as shown below:
ROUTe:SCAN:MODE VOLT
Colons separate the root command from the second-level command
(ROUTe:SCAN) and the second-level from the third-level (SCAN:MODE
VOLT). The parameters of a command are separated from the command by
a blank space.
Abbreviated
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, send the abbreviated form.
For better program readability, you may send the entire command. The
instrument will accept either the abbreviated form or the entire command.
For example, if the command syntax shows MEASure, then MEAS and
MEASURE are both acceptable forms. Other forms of MEASure, such as
MEASU or MEASUR will generate an error. You may use upper or lower
case letters. Therefore, MEASURE, measure, and MeAsUrE are all
acceptable.
Command keywords can be entered in their full form, as shown above, or
can be entered in their short form. In this manual, the entry required in
short form commands is always capitalized. The short form is generally
used for examples in this manual.
Implied Commands
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 this case, the
instrument assumes you intend to use the implied command and it responds
as if you had sent it. Examine this excerpt from the [ROUTe:] subsystem
shown below:
[ROUTe:]
SCAN <channel_list>
:MODE <mode>
:MODE?
:PORT <port>
Both the root command [ROUTe:] is an implied command. To set the
instrument’s scanning list, you can send either of the following command
statements:
ROUTe:SCAN (@100:115)
Note
54
or
SCAN (@100:115)
You must include a space between the keywords and any parameters.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Parameters
Parameter Types. The following table contains explanations and examples
of parameter types you might see later in this chapter.
Parameter Type
Numeric
Explanations and Examples
Accepts all commonly used decimal representations of
numbers including optional signs, decimal points, and
scientific notation.
123, 123E2, -123, -1.23E2, .123, 1.23E-2, 1.23000E-01.
Special cases include MIN, MAX, and DEF. MIN selects
minimum value available, MAX selects maximum value
available, and DEF selects default or reset value.
Boolean
Represents a single binary condition that is either true or false.
1 or ON; 0 or OFF.
Discrete
Selects from a finite number of values. These parameters
use mnemonics to represent each valid setting.
An example is the TRIGger:SOURce <source> command
where source can be BUS, DBUS, EXT, HOLD, or IMM.
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>] command. If you send the
command without specifying a parameter, the present ARM:COUNt value is
returned. If you send the MIN parameter, the command returns the
minimum count available. If you send the MAX parameter, the command
returns the maximum count available. Be sure to place a space between the
command and the parameter.
Linking Commands
Linking IEEE 488.2 Common Commands with SCPI Commands.
Use a semicolon between the commands. For example:
*RST;OUTP ON or TRIG:SOUR BUS;*TRG
Linking Multiple SCPI Commands. Use both a semicolon and a colon
between the commands. For example:
ARM:COUN 1;:TRIG:SOUR EXT
SCPI Command Reference
This section describes the Standard Commands for Programmable
Instruments (SCPI) commands for the multiplexer modules. Commands are
listed alphabetically by subsystem and also within each subsystem.
Chapter 5
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
55
ABORt
The ABORt subsystem stops a scan in progress when the scan is enabled via
the interface, and the trigger modes are TRIGger:SOURce BUS or
TRIGger:SOURce HOLD.
Subsystem Syntax
ABORt
• ABORt Operation. Resets the trigger system and places triggers in
Comments
idle. The scan is stopped without resetting the scan conditions. The
scan conditions stay in the current configuration.
• Stopping Scans Enabled from Interface. When a scan is enabled
from the interface, use an interface CLEAR command or the HP
E1301 front panel "Reset Instr" or "Clear Instr" key to stop the scan.
When the scan is enabled from the interface and the trigger source is
TRIGger:SOURce BUS or TRIGger:SOURce HOLD, use ABORt or
the HP E1301 front panel "Reset Instr "or "Clear Instr "keys to stop
the scan.
• Stopping Scans Enabled from Front Panel. When a scan is
enabled from the HP E1301 front panel execute *RST over the
interface or use the front panel "Reset Instr "or "Clear Instr" keys to
stop the scan.
• Related Commands. ARM, INITiate:CONTinuous, [ROUTe:]SCAN,
TRIGger
Example
Stopping a Scan with ABORt
TRIG:SOUR BUS
Bus is trigger source.
INIT:CONT ON
Set continuous scanning.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
.
.
.
ABOR
56
Aborts scan in progress.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
ARM
The ARM subsystem selects the number of scanning cycles (1 - 32767) for
each INIT command. This command does not apply to downloaded scan
lists. For downloaded scan lists, use INIT:CONT ON for multiple scans.
Subsystem Syntax
:COUNt
ARM
:COUNt <number> MIN | MAX
:COUNt? [MIN | MAX]
ARM:COUNt <number> MIN | MAX allows scanning cycles to occur a
multiple of times (1 to 32767) with one INITiate command and when
INITiate:CONTinuous OFF | 0 is set. MIN sets 1 scanning cycle and MAX
sets 32,767 scanning cycles.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
number
Numeric
1 - 32767 | MIN | MAX
• Number of Scans: Use only numeric 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
:COUNt?
Setting Ten Scanning Cycles
ARM:COUN 10
Set 10 scanning cycles.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
ARM:COUNt? [MIN | MAX] returns the current number of scanning cycles
set by ARM:COUNt. ARM:COUN? MIN returns 1 and ARM:COUN? MAX
returns 32767.
Parameters
Comments
Example
Chapter 5
Parameter Name
Parameter Type
Range of Values
MIN | MAX
Numeric
MIN = 1, MAX = 32767
• Related Commands: INITiate[:IMMediate]
Query Number of Scanning Cycles
ARM:COUN 10
Sets 10 scanning cycles.
ARM COUN?
Query number of scanning cycles;
returned value is 10.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
57
DISPlay
The DISPlay subsystem monitors the channel state of a selected module (or
card). This command can only be used when the FET multiplexer module
is used in a switchbox configuration. It operates with mainframes that have
a display, such as the HP 75000 Series B Mainframe (HP Model Number
E1301). It also operates with terminals connected to the serial interface port.
Subsystem Syntax
:MONitor:CARD
DISPlay
:MONitor
:CARD <number | AUTO>
[:STATe] <mode>
DISPlay:MONitor:CARD <number | AUTO> selects the module in a
switchbox to be monitored.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
number | AUTO
Numeric
1 - 99
• Selecting a Specific Module to be Monitored: Send the card
number in a switchbox with the DISPlay:MONitor:CARD command.
• Selecting the Present Module to be Monitored: Use the
DISPlay:MONitor:CARD AUTO command to select the last module
addressed by a switching command (e.g., [ROUTe:]CLOSe).
• *RST Condition: DISPlay:MONitor:CARD AUTO
Example
Select Module #2 in a Switchbox for Monitoring
DISP:MON:CARD 2
58
Selects module #2 in a switchbox.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
:MONitor[:STATe]
DISPlay:MONitor[:STATe] <mode> turns the monitor mode on or off.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
mode
Boolean
0 | 1 | ON | OFF
• Monitoring Switchbox Channels: DISPlay:MONitor[:STATe] ON
or DISPlay:MONitor[:STATe] 1 turns the monitor mode on to show
the channel state of the selected module. DISPlay:MONitor[:STATe]
OFF or DISPlay:MONitor[:STATe] 0 turns the monitor mode off.
• Selecting the Module to be Monitored: Use the DISPlay
MONitor:CARD <number> | AUTO command to select the module.
• Monitor Mode on an HP 1301 Mainframe Display: The
following three examples show the types of display you will get:
Chan: _
No channels closed on this card.
Chan: 12
Channel 12 closed.
Chan: 9,1
4-wire ohms set-up with voltage on
channel 9.
• *RST Condition: DISPlay:MONitor[:STATe] OFF | 0
Example
Chapter 5
Enabling the Monitor Mode
DISP:MON:CARD 2
Selects module #2 in a switchbox.
DISP:MON 1
Turns the monitor mode on.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
59
INITiate
The INITiate subsystem selects continuous scanning cycles and starts the
scanning cycle.
Subsystem Syntax
:CONTinuous
INITiate
:CONTinuous <mode>
:CONTinuous?
[:IMMediate]
INITiate:CONTinuous <mode> enables or disables continuous scanning
cycles for the switchbox or scanning voltmeter.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
mode
Boolean
0 | 1 | ON | OFF
• Continuous Scanning Operation: Continuous scanning is enabled
with the INITiate:CONTinuous ON or INITiate:CONTinuous 1
command. Sending the INITiate[:IMMediate] command closes the
first channel in the channel list. Each trigger from a trigger source
specified by the TRIGger:SOURce command advances the scan
through the channel list. A trigger at the end of the channel list
closes the first channel in the channel list and the scan cycle repeats.
Continuous scanning can be stopped by the ABORt command for
non-downloaded scans, and by a system reset or a power off for
downloaded scan lists.
• Scanning a Set Number of Cycles: The INITiate:CONTinuous OFF
or INITiate:CONTinuous 0 command goes through the scan list the
number of times specified by the ARM:COUNt command. Sending
the INITiate[:IMMediate] command closes the first channel in 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 the end of the channel list opens the last channel in
the channel list, and if the number of cycles has not reached the
ARM:COUNt parameter, returns to the beginning of the scan list and
closes the first channel. When the number of cycles equals the
ARM:COUNt parameter, the scanning cycle stops. Note that
ARM:COUNt does not apply to downloaded scan lists.
• Stopping Continuous Scans: Continuous scanning can be stopped
by the ABORt command for non-downloaded scans, and by a system
reset or a power off for downloaded scan lists.
• Related Commands: ABORt, ARM:COUNt, *RST, TRIGger,
TRIGger:SOURce
• *RST Condition: INITiate:CONTinuous OFF
60
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Example
:CONTinuous?
Enabling Continuous Scans
INIT:CONT ON
Enables continuous scanning.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
INITiate:CONTinuous? queries the scanning state. With continuous
scanning enabled, the command returns 1 (ON). With continuous scanning
disabled, the command returns 0 (OFF).
Example
[:IMMediate]
Query Continuous Scanning State
INIT:CONT ON
Enables continuous scanning.
INIT:CONT?
Query continuous scanning state.
INITiate[:IMMediate] starts the scanning cycle and closes the first channel
in the channel list. Successive triggers from the source specified by the
TRIGger:SOURce command advances the scan through the channel list.
Comments
• Starting the Scanning Cycle: The INITiate[:IMMediate] command
starts scanning by closing the first channel in the channel list. Each
trigger received advances the scan to the next channel in the channel
list. An invalid channel list generates an error (see the
[ROUTe:]SCAN command).
• Stopping Scanning Cycles: See the ABORt command.
Example
Chapter 5
Enabling a Single Scan
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
61
OUTPut
The OUTPut subsystem enables or disables the "Trig Out" port of the HP
E1300/E1301 Mainframe.
Subsystem Syntax
[:STATe]
OUTPut
[:STATe] <state>
[:STATe]?
OUTPut[:STATe] <state> enables/disables the "Trig Out" port on the rear
panel of the HP E1300/E1301 Mainframe. OUTPut[:STATe] ON | 1 enables
the port and OUTPut[:STATe] OFF | 0 disables the port.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
state
Boolean
0 | 1 | ON | OFF
• Downloaded Scans: The OUTPut subsystem does not work with
downloaded scan lists. The scan list is downloaded automatically if
you use TRIG:SOUR DBUS or TRIG:SOUR IMM (FET multiplexers
only). OUTPut works with all other scanning methods.
• Enabling "Trig Out" Port: When enabled, the "Trig Out" port is
pulsed each time a channel is closed during scanning. When
disabled, the "Trig Out" port is not pulsed.
• Output Pulse: The pulse is a +5 V negative-going pulse.
• "Trig Out" Port Reserved by Switchboxes: The "Trig Out"
resource is a system resource, and can only be reserved by one
instrument at a time.
• Related Commands: [ROUTe:]SCAN, TRIGger:SOURce
• *RST Condition: OUTPut[:STATe] OFF (port disabled)
Example
Enabling "Trig Out" Port
OUTP ON
[:STATe]?
Enables "Trig Out" port for pulse
output.
OUTPut[:STATe]? queries the present state of the "Trig Out" port. The
command returns 1 if the port is enabled, or 0 if disabled.
Example
62
Query "Trig Out" Port State
OUTP ON
Enables "Trig Out" port for pulse
output.
OUTP:STAT?
Query port enable state.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
[ROUTe:]
The [ROUTe:] subsystem controls switching and scanning operations for the
multiplexer modules in a switchbox.
Subsystem Syntax
CLOSe
[ROUTe:]
CLOSe <channel_list>
CLOSe? <channel_list>
OPEN <channel_list>
OPEN? <channel list>
SCAN <channel_list>
:MODE <mode>
:MODE?
:PORT <port>
:PORT?
SETTling
[:TIME] <time>, <channel_list>
[:TIME]? [MIN | MAX] <channel_list>
[ROUTe:]CLOSe <channel_list> closes multiplexer channels specified in the
channel list. The channel_list for CLOSe is in the form (@ccnn), or in special
circumstances, (@ccnn,ccnn), where cc = card number (00-99) and nn = channel
number (00-15). Before using the CLOSe command, you must specify the
SCAN:MODE and SCAN:PORT, as these commands determine what switches
will be closed for a given channel. You can only have one closed channel on a
card at a time. If you want to close a channel on two different cards in the same
VXIbus instrument (for example, 102,208) you can use (@ccnn,ccnn).
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
channel_list
Numeric
cc00 - cc15
• Specify SCAN:MODE and SCAN:PORT: Before using the CLOSe
command, specify the SCAN:MODE and SCAN:PORT.
• Closing Channels: To close:
– use [ROUTe:]CLOSe (@ccnn) for a single channel;
– use [ROUTe:]CLOSe (@ccnn,ccnn) for single channels on
different cards;
– use [ROUTe:]CLOSe (@ccnn,ccnn) for multiple channels;
– use [ROUTe:]CLOSe (@ccnn:ccnn) for sequential channels;
– use [ROUTe:]CLOSe (@ccnn:ccnn,ccnn:ccnn) for a group of
sequential channels;
– or any combination.
Closure order for multiple channels with a single command is
not guaranteed.
• Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOSe?,
[ROUTe:]SCAN:MODE, [ROUTe:]SCAN:PORT
• *RST Condition: All multiplexer channels are open.
Chapter 5
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
63
Example
Closing Multiplexer Channels
This example closes channel 00 of a multiplexer module card number 1 and
channel 15 of multiplexer module card number 2 in a single switchbox.
SCAN:MODE VOLT
SCAN:PORT ABUS
CLOS (@100,215)
CLOSe?
Comments
100 closes channel 00 of card #1;
215 closes channel 15 of card #2.
[ROUTe:]CLOSe? <channel_list> returns the current state of the
channel(s) queried. The channel list is in the form (@ccnn). The command
returns 1 if channels are closed and returns 0 if the channels are open.
• Query is Software Readback: The [ROUTe:]CLOSe? command
returns the current software state of the channel specified. It does
not account for relay hardware failures.
Example
OPEN
Query Multiplexer Channel Closure
CLOS (@100,215)
100 closes channel 00 of card #1;
215 closes channel 15 of card #2.
CLOS? (@215)
Query channel 215.
[ROUTe:]OPEN <channel_list> opens the multiplexer channels specified
in the channel_list. The channel_list is in the form (@ccnn), (@ccnn,ccnn),
(@ccnn:ccnn) or (@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99)
and nn = channel number (00-15).
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
channel_list
Numeric
cc00 - cc15
• Opening Channels: To open:
use [ROUTe:]OPEN (@ccnn) for a single channel;
use [ROUTe:]OPEN (@ccnn,ccnn) for multiple channels;
use [ROUTe:]OPEN (@ccnn:ccnn) for sequential channels;
use [ROUTe:]OPEN (@ccnn:ccnn,ccnn:ccnn) for a group of
sequential channels;
– or any combination.
–
–
–
–
Opening order for multiple channels with a single command is not
guaranteed.
• Open Channels: Opening an already open channel has no effect.
• Related Commands: [ROUTe:]CLOSe, [ROUTe:]OPEN?
• *RST Condition: All multiplexer channels are open.
64
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Example
Opening Multiplexer Channels
This example opens channel 00 of a multiplexer module card number 1 and
channel 15 of multiplexer module card number 2 in a single switchbox.
OPEN (@100,215)
OPEN?
100 opens channel 00 of card #1;
215 opens channel 15 of card #2.
[ROUTe:]OPEN? <channel_list> returns the current state of the channel(s)
queried. The channel list is in the form (@ccnn). The command returns 1
if the channel is open or returns 0 if the channel is closed.
Comments
• Query is Software Readback: The [ROUTe:]OPEN? command
returns the current software state of the channel(s) specified. It does
not account for relay hardware failures.
Example
SCAN
Query Multiplexer Channel Open State
OPEN (@100,215)
100 opens channel 00 of card #1;
215 opens channel 15 of card #2.
OPEN? (@215)
Query state of channel 215.
[ROUTe:]SCAN <channel_list> defines the channels to be scanned. The
channel_list has the form (@ccnn), (@ccnn,ccnn), (@ccnn:ccnn) or
(@ccnn:ccnn,ccnn:ccnn) where cc = card number (00-99) and nn = channel
number (00-15).
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
channel_list
Numeric
cc00 - cc15
• Channel List: Valid channel lists are:
–
–
–
–
–
a single channel, use (@ccnn);
for multiple channels, use (@ccnn,ccnn);
sequential channels, use (@ccnn:ccnn);
a group of sequential channels, use (@ccnn:ccnn,ccnn:ccnn);
or any combination.
• Defining the Channel List. When executing [ROUTe:]SCAN, the
channel list is checked for valid card and channel numbers. An error
is generated for an invalid channel list.
• Downloading a Scanning List: The channel_list is automatically
downloaded into RAM on the FET multiplexer modules for
TRIG:SOUR DBUS and TRIG:SOUR IMM trigger modes. The
complete list is downloaded onto each module in an instrument. The
channels are advanced with no direct intervention by the mainframe
CPU during the scan. If an instrument contains mixed modules
(FET and Relay Multiplexers), the scan list will not be downloaded.
Chapter 5
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
65
• 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 TRIGger:SOURce advances the scan through the
channel list.
• Stopping Scan: See the ABORt command.
• Related Commands: TRIGger, TRIGger:SOURce
• *RST Condition: All multiplexers channels are open.
Example
Scanning Using External Instruments
The following example shows how to scan channels using the HP E1300A/
E1301A Mainframe via HP-IB and an HP 3457A Digital Multimeter. This
example uses the mainframe’s "Trig Out" port to synchronize the
multiplexer module in a switchbox to the multimeter. The trigger pulse
from the port triggers the multimeter for a measurement. See Chapters 2
and 3 for typical user connections to the multiplexer.
The computer used in the example is an HP Series 200/300 with HP BASIC
as the program language. The computer interfaces with the mainframe over
HP-IB. Assumed is an HP-IB select code of 7, an HP-IB primary address of
09 and 22 for the HP E1300A/E1301A Mainframe and HP 3457A
Multimeter, respectively, and an HP-IB secondary address of 14 for the
switchbox.
10
OUTPUT 722;"TRIG EXT;DCV"
!Sets multimeter to external trigger
and to measure dc volts
20
OUTPUT 70914;"OUTP ON"
!Enables "Trig Out" port
30
OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus
triggers
40
OUTPUT 70914;"SCAN:MODE VOLT"!Sets switchbox to measure
voltage during scanning
50
OUTPUT 70914; "SCAN:PORT ABUS"!Sets switchbox to close the
appropriate tree switches during
scanning
60
OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list
70
OUTPUT 70914;"INIT"
!Starts scanning cycle
80
FOR I = 1 TO 16
!Start count loop
90
ENTER 722;A
!Enter reading into variable A
100 PRINT A
!Print reading in variable A
110 TRIGGER 70914
!Trigger the switchbox to advance
the channel list
120 NEXT I
!Increment count
130 END
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HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
SCAN:MODE
[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 Ohms measurements.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
mode
Discrete
NONE | VOLT | RES | FRES
• Order of Command Execution: The [ROUTe:]SCAN:MODE
command must be executed before the [ROUTe:]SCAN <channel_list>
and [ROUTe:]CLOSe <channel_list> commands.
• NONE and VOLT Mode Description: When selected, channel list
is set up for volts measurements.
• RES Mode Description: When selected, channel list is set up for
2-wire ohms measurements. The current source on I+ and I- is
superimposed on the channel being measured. Appropriate tree
isolation switches are automatically closed.
• FRES Mode Description: When selected, channel list is set up for
4-wire ohms measurements. Specify only the channel on which the
voltage is to be measured. The paired channel (plus or minus eight
channels away) on the other bank will automatically close. If you
specify both channels (@102, 110), the module will first setup for
FRES reading on 02, then setup for FRES reading on 10.
• *RST Condition: [ROUTe:]SCAN:MODE NONE
Example
SCAN:MODE?
Example
Selecting the 4-Wire Ohms Mode. This example scans 8 channels for
4-wire ohms resistance measurements.
TRIG:SOUR EXT
Selects external trigger source.
SCAN:MODE FRES
Selects the 4-wire ohms scanning
mode.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
[ROUTe:]SCAN:MODE? returns the current state of the scan mode. The
command returns NONE, VOLT, RES, or FRES if the scan mode is in the
NONE, VOLT, RES, or FRES mode, respectively.
Query Scan Mode
This example selects the 4-wire ohms measurement mode (FRES), then
queries the measurement state. Because 4-wire ohms mode is selected, the
query command returns FRES.
Chapter 5
SCAN:MODE FRES
Selects the 4-wire ohms scanning
mode.
SCAN:MODE?
Query the scanning mode.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
67
SCAN:PORT
[ROUTe:]SCAN:PORT <port> enables/disables the tree isolation switches.
SCAN:PORT ABUS closes the appropriate tree switches (for analog bus
connections). The [ROUTe:]SCAN:PORT NONE command disables the tree
switches and leaves them open. With SCAN:PORT NONE the closed
channels can only be measured through the respective bank direct terminals.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
port
Discrete
ABUS | NONE
• Order of Command Execution: The [ROUTe:]SCAN:PORT
command must be executed before the [ROUTe:]SCAN <channel_list>
and [ROUTe:]CLOSe <channel_list> commands.
• *RST Condition: [ROUTe:]SCAN:PORT NONE
Example
SCAN:PORT?
Example
Selecting the ABUS Port
TRIG:SOUR EXT
Selects external trigger source.
SCAN:MODE FRES
Selects the 4-wire ohms scanning
mode.
SCAN:PORT ABUS
Selects the analog bus port.
SCAN (@100:107)
Sets channel list.
INIT
Starts scanning cycle.
[ROUTe:]SCAN:PORT? returns the current state of the analog bus port.
The command returns NONE if the analog bus connection control relays are
disabled or ABUS if the control relays are enabled.
Query Scan Port
This example selects the analog bus port, then queries the state. Because
the analog bus port is selected, the query command returns ABUS.
68
SCAN:PORT ABUS
Selects the analog bus port.
SCAN:PORT?
Query the port selection.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
SETTling[:TIME]
[ROUTe:]SETTling[:TIME] <channel_list> sets the delay between receipt
of a channel closing trigger, and the pulse when the FET channel is closed.
You must specify one and only one channel for each card in the instrument
which has a channel in the channel list, and the <time> will then apply to all
channels on the card. The range is 1 to 32768 µsec.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
time
Numeric
1E-6 | 32768E-6 | MIN | MAX
channel_list
Numeric
only one channel
• Digital Bus Handshaking: This command allows a user-defined
settling time to allow a measurement to be made before the next
channel is closed.
• Related Commands: TRIGger:SOURce DBUS, TRIGger:SOURce
IMMediate
Example
SETTling[:TIME]?
Setting 16 µsec SETTling TIME
TRIGger:SOUR DBUS
Triggering on the digital bus
handshake lines
SETTling:TIME 16E-6
Delay = l6µsec
[ROUTe:]SETTling[:TIME]? [MIN | MAX] <channel_list> returns the
current setting for a specified channel. MIN or MAX returns the minimum
and maximum allowable settings.
Parameters
Comments
Example
Chapter 5
Parameter Name
Parameter Type
Range of Values
MIN | MAX
Numeric
MIN = 1 µsec, MAX = 32768 µsec
channel_list
Numeric
only one channel
• Returned value is given in exponential notation.
Set and Query the SETTling TIME
SETT:TIME 16E-6
Sets delay = 16µsec.
SETT:TIME?
Returns + 1.600000E-005.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
69
STATus
The STATus subsystem reports the bit values of the Operation Status
Register. This enables the Status Register to set a bit after a bit is set to 1 by
the Operation Status Register.
Subsystem Syntax
:OPERation:ENABle
STATus
:OPERation
:ENABle <number>
[:EVENt]?
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
Comments
Parameter Name
Parameter Type
Range of Values
number
Numeric
1 - 32768
• Setting Bit 7 of the Status Register: STATus:OPERation:ENABle
256 sets bit 7 of the Status Register to 1 after bit 8 of the Operation
Status Register is set to 1.
• Disabling STATus:OPERation: The STATus:PRESet command
disables the STATus:OPERation:ENABle command.
• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL,
STATus:PRESet
Example
Enable the Status Register Bit 7
STAT:OPER:ENAB 256
:OPERation[:EVENt]?
Comments
Enables bit 7 of the Status Register.
STATus:OPERation[:EVENt]? returns the bit value of the Operation
Status Register (only bit 8 is used by the multiplexer modules).
• Setting Bit 8 of the Operation Status Register: Bit 8 (Scan
Complete) is set to 1 after a scanning cycle completes. Bit 8 returns
to 0 after sending the STATus:OPERation[:EVENt]? command. For
correct operation set to 0 by *CLS before scanning.
• Returned Data after sending the STATus:OPERation[:EVENt]?
Command: The command returns +256 if bit 8 of the Operation
Status Register is set to 1. The command returns +0 if bit 8 of the
Operation Status Register is set to 0.
• Related Commands: [ROUTe:]SCAN, *SRE, *STB?, *SPOLL
Example
70
Reading the Operation Status Register after a Scanning Cycle
STAT:OPER?
Reads the register value
read and print the register value
+256 shows bit 8 is set to 1; +0
shows bit 8 is set to 0.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
SYSTem
The SYSTem subsystem returns the error numbers and error messages in
the error queue of a switchbox, and returns the types and descriptions of
modules (cards) in a switchbox.
Subsystem Syntax
:CDEScription?
SYSTem
:CDEScription? <number>
:CPON <number | ALL>
:CTYPe? <number>
:ERRor?
SYSTem:CDEScription? <number> returns the description of a selected
module (card) in a switchbox.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
number
Numeric
1 - 99
• 16-Channel FET Multiplexer Module Description: The
SYSTem:CDEScription? <number> command returns:
16 Channel FET Mux
• 16-Channel Thermocouple FET Multiplexer Module Description:
The SYSTem:CDEScription? <number> command returns:
16 Channel FET Mux with T/C
Example
Reading the Description of Card #1 Module
SYST:CDES? 1
:CPON
Determine the description.
SYSTem:CPON <number | ALL> opens all channels of a selected module,
or all modules (cards) in a switchbox.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
number
Numeric
1 - 99 | ALL
• Differences between *RST and CPON: SYSTem:CPON only opens
all channels of a selected module or all modules in a switchbox.
*RST opens all channels of all modules in a switchbox and also sets
the trigger modes to the power-on states.
Example
Opening All Channels on Card #1
SYST:CPON 1
Chapter 5
Opens all channels on card #1.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
71
:CTYPe?
SYSTem:CTYPe? <number> returns the module (card) type of a selected
module in a switchbox.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
number
Numeric
1 - 99
• 16-Channel FET Multiplexer Module Model Number:
The SYSTem:CTYPe? <number> command returns:
HEWLETT-PACKARD,E1351A,0,A.03.00
• 16-Channel Thermocouple FET Multiplexer Module Model Number:
The SYSTem:CTYPe? <number> command returns:
HEWLETT-PACKARD,E1353A,0,A.03.00
Note: The first number after the model number is the serial number
of the module (always 0); the module revision code follows the
serial number (for example, A.03.00).
Example
Reading the Model Number of a Card #1 Module
SYST:CTYP? 1
:ERRor?
Determine the model number.
SYSTem:ERRor? returns the error numbers and corresponding error
messages in the error queue of a switchbox. See Appendix C for a listing of
the switchbox error numbers and messages.
Comments
• Error Numbers/Messages in the Error Queue: Errors generated
by a switchbox stores an error number and corresponding error
message in the error queue. 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 SYSTem:ERRor? command is sent.
The errors are cleared first-in, first-out. When the queue is empty,
each following SYSTem:ERRor? command returns 0, "No error".
To clear all error numbers/messages in the queue, execute the *CLS
command.
• Maximum Error Numbers/Messages in the Error Queue: The
queue holds a maximum of 30 error numbers/messages for each
switchbox. If the queue overflows, the last error number/message in
the queue is replaced by -350, "Too many errors". The least recent
error numbers/messages remain in the queue and the most recent are
discarded.
Example
Reading the Error Queue
SYST:ERR?
72
Query the error queue.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
TRIGger
The TRIGger subsystem commands control the scan triggering operation of
the multiplexer modules.
Subsystem Syntax
TRIGger
[:IMMediate]
:SOURce BUS | DBUS | 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. Note that
TRIGger[:IMM] is not the same as TRIGger:SOURce IMM.
Comments
• Executing the TRIGger[:IMMediate] Command: A channel list
must be defined with the [ROUTe:]SCAN <channel_list> command
and an INITiate[:IMMediate] command must be executed before
TRIGger[:IMMediate] can trigger the 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[:IMMediate] command.
• Related Commands: INITiate, [ROUTe:]SCAN
Example
Chapter 5
Advancing Scan using the TRIGger Command
TRIG:SOUR HOLD
Sets trigger source to hold.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
loop statement
Start count loop.
TRIG
Advances scan to next channel.
increment loop
Increment count loop.
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
73
:SOURce
TRIGger:SOURce BUS | DBUS | EXTernal | HOLD | IMMediate specifies
the trigger source to advance the channel list during scanning.
Parameters
Comments
Parameter Name
Parameter Type
Range of Values
BUS
Discrete
*TRG command
DBUS
Discrete
Digital Bus
EXTernal
Discrete
Event In port
HOLD
Discrete
Hold Triggering
IMMediate
Discrete
Continuous Triggering
• Enabling the Trigger Source: The TRIGger:SOURce command
only selects the trigger source. The INITiate[:IMMediate] command
enables the trigger source.
• Using the TRIG Command: You can use TRIGger[:IMMediate] to
advance the scan when TRIGger:SOURce BUS or TRIGger:SOURce
HOLD is selected.
• Using Digital Bus Trigger: TRIGger:SOURce DBUS selects the
digital bus on the multiplexer as the trigger. Any open collector TTL
trigger source can be wired to the "Channel Advance" lead. A
negative-going pulse triggers the multiplexer and advances it to the
next channel on the scanning list. After the SETTling:TIME delay,
the multiplexer asserts "Channel Closed" on the digital bus.
• Using External Trigger Inputs: With TRIGger:SOURce EXTernal
selected, only one switchbox at a time can use the external trigger
input at the HP E1300A/E1301A Mainframe’s "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 the switchbox
receives a command to change the source. When the source is
changed, the external trigger source is available to another switchbox
(with a TRIGger:SOURce EXTernal command). Another switchbox
cannot receive an external trigger source if the source is already
assigned, or an error is generated.
• Using Bus Triggers: To trigger the switchbox with
TRIGger:SOURce BUS selected, use TRIGger[:IMMediate], the IEEE
488.2 common command *TRG or the HP-IB Group Execute Trigger
(GET).
• "Trig Out" Port Shared by Switchboxes: See the OUTPut
command.
• Related Commands: ABORt, [ROUTe:]SCAN, SETTling[:TIME],
TRIGger
• *RST Condition: TRIGger:SOURce IMMediate
74
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Example
Scanning Using External Triggers
In the following example, the trigger input is applied to the HP
E1300A/E1301A Mainframe’s "Event In" port.
TRIG:SOUR EXT
Sets trigger source to external.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
trigger externally
Advances scan to next channel.
Scanning Using Bus Triggers
:SOURce?
Example
Chapter 5
TRIG:SOUR BUS
Sets interface (bus) triggering.
SCAN (@100:115)
Sets channel list.
INIT
Starts scanning cycle.
*TRG
Advances channel list.
TRIGger:SOURce? returns the current trigger source for the switchbox.
Command returns either BUS, DBUS, EXT, HOLD, or IMM for trigger
sources BUS, DBUS, EXTernal, HOLD, or IMMediate, respectively.
Query Trigger Source
TRIG:SOUR EXT
Sets trigger source to external.
TRIG:SOUR?
Query trigger source; returns
"EXT".
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
75
IEEE 488.2 Common Commands
The following table lists the IEEE 488.2 Common (*) Commands that the
16-Channel FET Multiplexer 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 HP 75000 Series B
Mainframe User’s Manual (HP Model Number E1300/E1301) or the
ANSI/IEEE Standard 488.2-1987.
Command
Title
Description
*IDN?
Identification
Returns identification string of the switchbox.
*RST
Reset
Opens all channels, and invalidates current channel list for
scanning. Sets ARM:COUN 1, TRIG:SOUR IMM, and INIT:CONT OFF.
*TST?
Self-Test
Power-on interrupt returns +110
Incorrect MFR ID or model code returns +103
Test pass returns 0.
*OPC
*OPC?
Operation Complete
Operation Complete Query
See note below.
See note below.
*WAI
Wait to Complete
See note below.
*CLS
Clear status
Clears all status registers (see STATus:OPERation[:EVENt]?).
*ESE
*ESE?
Event status enable
Event status enable query
See note below.
See note below.
*ESR?
Event status register query
See note below.
*SRE
*SRE?
Service request enable
Enables status register bits (see Chapter 4 for operation).
Service request enable query See note below.
*STB?
Read status byte query
See note below.
*TRG
Trigger
Triggers the switchbox to advance the scan when scan is enabled
and trigger source is TRIGger:SOURce BUS | HOLD.
*RCL
Recall instrument state
See note below.
*SAV
Store instrument state
See note below.
Note: These commands apply to many instruments and are not documented in detail here. See the HP 75000
Series B E1300/E1301 Mainframe User’s Manual or the ANSI/IEEE Standard 488.2-1987 for more information.
76
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Command Quick Reference
The following tables summarize SCPI and IEEE 488.2 Common (*)
Commands for the 16-Channel FET Multiplexer Modules.
SCPI Commands Quick Reference
Command
Description
ABORt
Abort a scan in progress.
ARM
:COUNt <number> MIN | MAX
:COUNt? [MIN | MAX]
Multiple scans per INIT command.
Query number of scans.
DISPlay
:MONitor:CARD <number> | AUTO
:MONitor[:STATe] <mode>
Selects module to be monitored.
Selects monitor mode.
INITiate
:CONTinuous <mode>
:CONTinuous?
[:IMMediate]
Enables/disables continuous scanning.
Query mode.
Starts a scanning cycle.
OUTPut
[:STATe] <state>
[:STATe]?
Enables/disables "Trig Out" pulse.
Query state of trig out pulse.
[ROUTe:] CLOSe <channel _list>
CLOSe? <channel _list>
OPEN <channel _list>
OPEN? <channel _list>
SCAN <channel _list>
SCAN:MODE NONE | VOLT | RES | FRES
SCAN:MODE?
SCAN:PORT NONE | ABUS
Close channel(s).
Query channel(s) closed.
Open channel(s).
Query channel(s) opened.
Define channels for scanning.
Selects appropriate tree Isolation switches for measurements.
Query state of scan mode.
Enables tree isolation switches closure as part of a
measurement.
SCAN:PORT?
Query analog bus state.
SETTling[:TIME] <channel_list>
Sets delay between trigger pulse and channel closed pulse.
SETTling[:TIME]? [MIN | MAX] <channel_list> Returns current parameter in SETTling[:TIME].
STATus
:OPERation:ENABle
:OPERation[:EVENt]?
Enables the Operation Status Register to set a bit in the
Status Register.
Returns status of Operation Status Register.
SYSTem :CDEScription? <number>
:CPON <number> | ALL
:CTYPe? <number>
:ERRor?
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
Causes a trigger to occur.
Trigger source is *TRG.
Trigger source is Digital Bus.
Trigger source is "Event In" port.
Hold off triggering.
Continuous (internal) triggers.
Query scan trigger source.
[:IMMediate]
:SOURce BUS
:SOURce DBUS
:SOURce EXTernal
:SOURce HOLD
:SOURce IMMediate
:SOURce?
IEEE 488.2 Common Commands Quick Reference
Command
Title
Description
*RST
Reset
Opens all channels and 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
Power on interrupt returns +110.
Incorrect MFR ID or model code returns +103.
Test pass returns 0.
Chapter 5
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
77
Notes
78
HP E1351A/53A 16-Channel FET Multiplexer Command Reference
Chapter 5
Appendix A
HP E1351A/53A FET Multiplexer
Specifications
Maximum Voltage:
Terminal to Chassis: ±16V peak*
(input impedance less above 14V
peak)
Maximum Current per Channel:
1 mA (non-inductive)
Maximum Offset Voltage:
25 µV (0° to 28°C)
250 µV (28° to 55°C)
Input Impedance:
Power On (Vin <±10V)
High to Low: >108Ω
High or Low to Chassis: >108Ω
Guard to Chassis: 10 kΩ ±10%
Capacitance:
High or Low to Chassis: <200pf
High to Low: <200pf
Power Off (High to Low):
for Vin ≤14V: 1000Ω
for Vin >14V: 220Ω
Closed Channel Resistance:
<3.1 kΩ for high or low input
(Guard not switched)
Screw Terminal Wire Size:
16 AWG Max, 26 AWG Min
Watts/Slot: 1
Cooling/Slot:
0.02 mm H2O @ 0.10 liter/sec
Module Size/Device Type:
B, register-based
Humidity: 65% 0° to 40°C
Connectors Used: P1
Operating Temperature:
0° to 55°C
Number of Slots: 1
Interrupt Level: selectable
Power Requirements:
Voltage:
+5V
Peak module
current, IPM (A): 0.20
Dynamic module
current, IDM (A): 0.01
Storage Temperature:
-40° to 75°C
+12V
0.13
EMC, RFI, Safety:
meets FTZ 1046/1984, CSA 556B,
IEC 348, UL 1244
0.01
Net Weight (kg): 0.9
Strain Gage Excitation:
+ 4.63V ±10%
Max Current: 400mA
(short circuit protected)
Reference Junction Measurement
Accuracy (HP E1353A only): 0.3°C
(over 18° to 28°C operating temperature)
Bandwidth (-3dB):
50Ω source, 1 MΩ | |10pF
termination: >200 kHz
* Each FET is diode clamped to ±14V and a 220Ω series resistor.
This limits the current to the clamp diodes.
Appendix A
HP E1351A/53A FET Multiplexer Specifications 79
Notes
80 HP E1351A/53A FET Multiplexer Specifications
Appendix A
Appendix B
HP E1351A/53A Register-Based
Programming
About This Appendix
The HP E1351A and HP E1353A FET and Thermocouple FET
Multiplexers are register-based modules which do not support the VXIbus
word serial protocol. When a SCPI command is sent to the multiplexer, the
HP E1406A Command Module (Series C) or HP E1300A/E1301A
Mainframe (Series B) parses the command and programs the multiplexer at
the register level.
Register-based programming is a series of reads and writes directly to the
multiplexer registers. This increases throughput speed since it eliminates
command parsing and allows the use of an embedded controller. Also, if
slot 0, the resource manager, and the computer (HP-IB) interface are
provided by other devices, a C-size system can be downsized by removing
the command module.
This appendix contains the information you need for register-based
programming. The contents include:
•
•
•
•
•
Register Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Bit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Executing Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register-Based Programming for Maximum
Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 81
Page 84
Page 86
Page 90
Page 93
Register Addressing
Register addresses for register-based devices are located in the upper 25%
of VXIbus A16 address space. Every VXIbus device (up to 256 devices) is
allocated a 32 word (64 byte) block of addresses. The HP E1351A/E1353A
multiplexers use eight two-byte registers of the 64 addresses (32 word
registers) allocated.
Figure B-1 shows the register address location within A16 as it might be
mapped by an embedded controller. Figure B-2 shows the location of A16
address space in the HP E1300A/E1301A Mainframe and HP E1405/06A
Command Module.
Appendix B
HP E1351A/53A Register-Based Programming 81
Figure B-1. Multiplexer Registers within A16 Address Space
Figure B-2. Registers within HP E1301/E1406 A16 Address Space
82 HP E1351A/53A Register-Based Programming
Appendix B
The Base Address
A16 Address Space
Outside the
Command Module
or Mainframe
When reading or writing to a multiplexer register, specify a hexadecimal or
decimal register address. This address consists of a base address plus a
register offset. The base address used programming depends on whether the
A16 address space is outside or inside the HP E1405A/E1406A Command
Module or HP E1300A/E1301A Mainframe.
When the command module or mainframe is not part of your VXIbus
system (Figure B-1), the multiplexer’s base address is computed as:*
C00016 + (LADDR * 64)16
or
49,152 + (LADDR * 64)
where C00016 (49,152) is the starting location of the register addresses,
LADDR is the multiplexer’s logical address, and 64 is the number of
address bytes per VXIbus device. For example, the multiplexer’s factory
set logical address is 112. With this address, the multiplexer has a base
address:
C00016 + (112 * 64)16
C00016 + 1C0016 = DC0016
or (decimal)
49,152 + (112 * 64)
49,152 + 7,168 = 56,320
A16 Address Space
Inside the
Command Module
or Mainframe
When the A16 address space is inside the command module or mainframe
(Figure B-2), the multiplexer’s base address is computed as:
1FC00016 + (LADDR * 64)16
or
2,080,768 + (LADDR * 64)
where 1FC00016 (2,080,768) is the starting location of the VXI A16
addresses, LADDR is the multiplexer’s logical address, and 64 is the
number of address bytes per register-based device. Again, the multiplexer’s
factory set logical address is 112. If this address is not changed, the
multiplexer will have a base address of:
1FC00016 + (112 * 64)16
1FC00016 + 1C0016 = 1FDC0016
or
2,080,768 + (112 * 64)
2,080,768 + 7,168 = 2,087,936
* The "16" at the end of the address indicates a hexadecimal number.
Appendix B
HP E1351A/53A Register-Based Programming 83
Register Offset
The register offset is the register’s location in the block of 64 address bytes.
For example, with a LADDR of 112 the multiplexer’s Scan Channel Delay
Register has an offset of 0816. When you write a command to this register,
the offset is added to the base address to form the register address:
DC0016 + 0816 = DC0816
(A16 outside the command module)
1FDC0016 + 0816 = 1FDC0816 (A16 inside the command module)
or
56,320 + 8 = 56,328
(A16 outside the command module)
2,087,936 + 8 = 2,087,944
(A16 inside the command module)
Register Descriptions
There are six WRITE and two READ-only registers on the multiplexer.
You can READ-back three of the WRITE registers. This section contains a
description and a bit map of each register. Note that the bit names with an *
after them are True (asserted) when low (zero). An X represents a "do not
care" situation and a 1 always represents 1.
WRITE Registers
The following WRITE registers are located on the multiplexer:
•
•
•
•
•
•
READ Registers
Status/Control Register (base + 0416)
Scan Control Register (base + 0616)
Scan Channel Delay Register (base + 0816)
Scan Channel Configuration Register (base + 0A16)
Direct Channel Configuration Register (base + 0C16)
Direct Control Register (base + 0E16)
There are two READ-only registers and three READ-back registers.
•
•
•
•
•
Manufacturer ID Register (base + 0016) READ-only
Device Type Register (base + 0216) READ-only
Status/Control Register (base + 0416)
Scan Control Register (base + 0616)
Scan Channel Delay Register (base + 0816)
Manufacturer ID Register
base + 0016
15
14
13
12
Write
Read
11
10
9
8
7
6
5
4
3
2
1
0
Undefined
Device
Class
Address
Space
84 HP E1351A/53A Register-Based Programming
Manufacturer ID
Appendix B
Device Type Register
base + 0216
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Write
Undefined
Read
Model Code
Status/Control Register
base + 0416
15
14
13
12
11
10
9
8
Write
Undefined
X
X
X
TRG
INT
DIR
IRQ
EN
X
CRD
RST
Read
Undefined
1
1
1
BSY*
1
1
IRQ*
IRQ
EN*
7
6
5
4
3
2
1
0
Scan Control Register
base + 0616
15
14
13
12
11
10
9
8
Write
Undefined
X
X
X
RST CNT IMM DBS CLR
PTR EN
EN
EN SCN
Read
Undefined
1
1
1
1
CNT IMM DBS CLR
EN
EN
EN SCN
Scan Channel Delay Register
base + 0816
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Undefined
X
X
X
X
D3
D2
D1
D0
Read
Undefined
1
1
1
1
D3
D2
D1
D0
Scan Channel Configuration Register
base + 0A16
Write
15
14
13
VLD* A_D* B_D*
12
11
10
9
8
7
6
5
4
3
2
1
0
C1
C0
X
X
X
X
X
X
X
D3
D2
D1
D0
Read
Undefined
Direct Channel Configuration Register
base + 0C16
15
14
13
Write
12
11
10
9
8
Undefined
Read
7
6
5
4
3
2
1
0
X
X
X
X
D3
D2
D1
D0
7
6
5
4
3
2
1
0
X
X
X
C1
C0
Undefined
Direct Control Register
base + 0E16
Write
Read
Appendix B
15
14
13
12
11
Undefined
10
9
8
VLD* A_D* B_D*
Undefined
HP E1351A/53A Register-Based Programming 85
Register Bit Descriptions
This section contains a description of the function of each bit which is
addressable in each register. The bits are listed according to the title of the
WRITE bit name, with the READ definition at the end of the description.
For registers 0016 and 0216, the bits are listed according to the title of the
READ definition.
Manufacturer ID
Register
base + 0016
15
14
13
The 16-Channel FET Multiplexer Module always returns FFFF16 on a
Manufacturer ID Register READ.
12
11
10
9
Write
8
7
6
5
4
3
2
1
0
1
1
1
1
1
1
1
Undefined
Read
1
1
1
Device Class
Address Space
Manufacturer ID
Device Type
Register
base + 0216
15
14
13
1
1
1
1
1
1
There are four classifications. The FET Multiplexer Module is a
register-based device (11).
The FET Multiplexer Module uses A16 address mode.
Hewlett-Packard’s identification number is 4095, which corresponds to bits
11 - 0 all set to 1.
The Device Type Register contains a model code which identifies the
module.
12
11
10
9
8
7
Write
Undefined
Read
Model Code
Model Code
6
5
4
3
2
1
0
Model Code. The following model codes identify the HP E1351A FET
Multiplexer and HP E1353A Thermocouple FET Multiplexer:
F F 1 016 HP E1351A 16-Channel FET Multiplexer
F F 1 216 HP E1353A 16-Channel Thermocouple FET Multiplexer
86 HP E1351A/53A Register-Based Programming
Appendix B
Status/Control
Register
base + 0416
15
14
13
The Status/Control WRITE register is used to reset the module, enable
interrupts, choose direct or scan list control of the channels and to internally
trigger channel closing. The READ register indicates if interrupts are
enabled, if there is an interrupt and if the module is busy.
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Undefined
X
X
X
TRIG
INT
DIR
IRQ
EN
X
CRD
RST
Read
Undefined
1
1
1
BSY*
1
1
IRQ*
IRQ
EN*
Card Reset (CRD RST)
Writing a one (1) to bit 0 resets the multiplexer. Writing a zero turns the
reset function off. You must write a zero after a reset or the module will not
operate. The Reset conditions are: all Enables are set false, clear scan list,
scan mode enabled (direct bit set 0), DELAY is l µsec and all channels
opened.
Interrupt Request
Enable (IRQ EN)
Writing a one (1) enables the card to generate interrupts, a zero (0) disables
it. Enabling this bit puts a zero (0) in IRQ EN*.
Direct (DIR)
Selects between direct control and scan list control. A zero (0) indicates
scan list control and a one (1) indicates direct control. For scan list control
the Direct Registers (base + 0C, base + 0E) are invalidated. For direct
control the Scan Channel Configuration Register is invalidated.
Trigger Internal
(TRG INT)
Writing a one (1) immediately advances a channel on the scan list, a zero
(0) is the idle state. Bit is automatically set back to zero (0) upon channel
advance.
Interrupt Request
Enable (IRQ EN*)
Reading a zero (0) indicates enabled, reading a one (1) indicates disabled.
Interrupt Request (IRQ*)
Reading a zero (0) indicates an interrupt, a one (1) indicates no interrupt.
This bit remains one (1) if IRQ EN is disabled. Interrupt remains set until
Card Reset or interrupt has been acknowledged.
Busy (BSY*)
Appendix B
This bit is set zero (0) during channel closing and the delay period. Triggers
will not be accepted. BSY* is unasserted at the beginning of the Channel
Closed pulse. If a trigger occurs during the Channel Closed pulse, the pulse
is terminated and the channel is advanced. Operates only with downloaded
scan list (DIR is zero).
HP E1351A/53A Register-Based Programming 87
Scan Control
Register
base + 0616
15
14
13
The Scan Control Register allows you to clear the scan list, set the trigger
mode and reset the pointer to the beginning of the scan list. This register is
a READ-back register, allowing you to verify the state of the WRITE
register.
12
11
10
9
8
7
6
5
Write
Undefined
X
X
X
Read
Undefined
1
1
1
4
3
2
1
0
RST CNT IMM DBS CLR
PTR EN
EN
EN SCN
1
CNT IMM DBS CLR
EN
EN
EN SCN
Clear Scan List
(CLR SCN)
Writing a one (1) in this bit clears the scan list. The bit must be set back to
zero (0) after flushing. CLR SCN (Read) returns the state of the bit.
Digital Bus Enable
(DBS EN)
Writing a one (1) enables the digital bus trigger mode. A zero (0) disables
it. DBS EN (Read) returns the state of the bit.
Immediate Enable
(IMM EN)
Writing a one (1) in this bit sets trigger to immediate, which means that as
soon as the first channel is closed by the TRG INT, the entire scan list is run
without any further triggering. Channel advance speed is determined by the
delay time specified. This has extremely limited applications.
Continuous Enable
(CNT EN)
Writing a one (1) in this bit enables the card to continually cycle through the
scan list. When this bit is enabled, the last channel in a scan list resets the
pointer back to the beginning of the scan list.
Reset Pointer
(RST PTR)
Scan Channel
Delay Register
base + 0816
15
14
13
Writing a one (1) resets the pointer back to the beginning of the scan list.
CNT EN true automatically resets pointer at end of scan list. If CNT EN is
set true, an interrupt also resets the pointer. If CNT EN is set false, the last
channel in the scan list generates an interrupt if the channel is valid (VLD*
set true).
The Scan Channel Delay Register sets the SETTling:TIME, the time between
receipt of a channel closing trigger and the Channel Closed pulse. The
delay is 2n µS and n has a range of 0 to 15. D3 to D0 set n, and D0 is the
least significant bit. This register is a read-back register, allowing you to
verify the state of the WRITE register.
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Undefined
X
X
X
X
D3
D2
D1
D0
Read
Undefined
1
1
1
1
D3
D2
D1
D0
D3 - D0
D0 is the least significant bit, D3 is the most significant. These bits
designate a number between 0 and 15 for n.
88 HP E1351A/53A Register-Based Programming
Appendix B
Scan Channel
Configuration
Register
base + 0A16
Write
15
14
13
VLD* A_D* B_D*
These bits set the <channel_list> for a scan list, set the type of measurement
and enable/disable the tree isolation switches. Note that the DIR in the
Status/Control Register must be set false to enable this register.
12
11
10
9
8
7
6
5
4
3
2
1
0
C1
C0
X
X
X
X
X
X
X
D3
D2
D1
D0
Read
Undefined
D3 - D0
Configuration Bit
(C1 - C0)
These bits set the channel number, with a range of 0 - 15. Bit D0 is the least
significant bit, and bit D3 is the most significant.
These bits determine the measurement mode as listed below:
C1
0
0
1
1
C0
0
1
1
0
Volts
2-wire ohms
4-wire ohms
Thermistor
Note that to obtain the Thermistor reference temperature for Thermocouple
measurements, you must set the configuration bits for Thermistor. After
you have obtained the reference temperature, set the bits for Volts.
B and A Tree Isolation
Switch Disable
(B-D*, A-D*)
Valid Channel (VLD*)
Direct Channel
Configuration
Register
base + 0C16
15
14
13
Write
A zero indicates that the specified channel is valid. When entering a scan
list the entire list must be loaded into each module. For the channels that
are not on that module, the VLD* must be set false. See [ROUTe:]SCAN in
the “ Executing Commands” section in this Appendix.
The Direct Channel Register allows you to specify channels to be closed
individually. Note that the DIR bit in the Status/Control Register must be
set true for this register to be enabled.
12
11
Undefined
Read
10
9
8
7
6
5
4
3
2
1
0
X
X
X
X
D3
D2
D1
D0
Undefined
D3 - D0
Appendix B
A zero in either one disables the respective Tree Isolation Switch.
Generally, both disabled together equal the [ROUTe:]SCAN:PORT NONE
command.
These data bits set the channel number with a range of 0 - 15. Bit D0 is the
least significant bit, and bit D3 is the most significant.
HP E1351A/53A Register-Based Programming 89
Direct Control
Register
base + 0E16
15
14
13
Write
The Direct Control Register allows you to set the controls for individual
channels. Note that the DIR bit in the Status/Control Register must be set
true for this register to be enabled.
12
11
10
9
8
Undefined
Read
7
6
5
X
X
X
4
3
2
VLD* A_D* B_D*
1
0
C1
C0
Undefined
C1 - C0
These configuration bits determine the measurement mode as listed below:
C1
0
0
1
1
C0
0
1
1
0
Volts
2-wire ohms
4-wire ohms
Thermistor
Note that to obtain the Thermistor reference temperature for Thermocouple
measurements, you must set the configuration bits for Thermistor. After
you have obtained the reference temperature, set the bits for Volts.
B and A Tree Isolation
Switch Disable
(B-D*, A-D*)
Valid Channel (VLD*)
A zero in either one disables the respective tree isolation switch. Generally,
both disabled together equal the [ROUTe:]SCAN:PORT NONE command.
A zero indicates that the specified channel is valid. If DIR is valid and
INT EN is true, a WRITE to this register will generate an interrupt.
Executing Commands
This command lists the SCPI commands and shows how to execute them
with register-based programming. For further information on register-based
programming see the HP E1326B Multimeter User’s Manual.
ABORt
ARM:COUNt
DISPlay:MONitor
INITiate
ABORt does not have an equivalent in register-based programming. This
command is executed from the front panel or over HP-IB.
The ARM:COUNt command does not have an equivalent in register-based
programming. To scan for a specified number of cycles, use the interrupt
generated at the end of the scan list to advance through a program loop for
the set number of cycles. For each pass through the loop, reset the pointer
to the beginning of the scan list. The IRQ EN in the Status/Control Register
must be enabled.
The DISPlay:MONitor[:STATe] command does not have an equivalent in
register-based programming. For high-speed operation it should be set to
DISPlay:MONitor OFF.
INITiate:CONTinuous is equivalent to the CNT EN bit in the Scan Control
Register.
90 HP E1351A/53A Register-Based Programming
Appendix B
INITiate[:IMMediate] is equivalent to writing a one to the TRG INT in the
Status/Control Register. The TRG INT sets itself back to zero after pulsing
the FET. If you have a multiple-module configuration and a downloaded
scan list, the module with the first channel on the scan list must be the last
one to receive the TRG INT. The scan cycle will start as soon as the card
with a valid channel receives TRG INT.
OUTPut
[ROUTe:]
The OUTPut[:STATe] command does not have an equivalent in
register-based programming.
[ROUTe:]CLOSe <channel_list> is equivalent to the following:
• DIR in the Status/Control Register is enabled.
• D0 to D3 is set to a channel number in the Direct Channel
Configuration Register.
[ROUTe:]OPEN <channel_list> can be implemented by setting VLD* false
in either the Scan Channel Configuration Register or the Direct Control
Register (whichever one closed the channel). It can also be implemented by
toggling the DIR bit in the Status/Control Register.
For [ROUTe:]SCAN <channel_list>, the complete scan list must be loaded
in each module in a multiple-module configuration. The channel is set valid
if it is in that module, and invalid in the other modules. The channel list is
downloaded in the following way:
• Set CLR SCN in Scan Control Register to one, then back to zero, to
clear the previous scan list.
• DIR in the Status/Control Register is set to false.
• Channel number is set in D0 to D3 in the Scan Channel
Configuration Register.
The example below shows how to set a scan list for channels
(@100,101,200,201):
• Write to the Scan Channel Configuration Register on card 1:
VLD* true (0), 0000 to D3-D0
Sets channel 100.
VLD* true (0), 0001 to D3-D0
Sets channel 101.
VLD* false (1), XXXX to D3-D0
Reserves position in scan list for
channel 200.
VLD* false (1), XXXX to D3-D0
Reserves position in scan list for
channel 201.
• Write to the Scan Channel Configuration Register on card 2:
Appendix B
VLD* false (1), XXXX to D3-D0
Reserves position in scan list for
channel 100.
VLD* false (1), XXXX to D3-D0
Reserves position in scan list for
channel 101.
VLD* true (0), 0000 to D3-D0
Sets channel 200.
VLD* true (0), 0001 to D3-D0
Sets channel 201.
HP E1351A/53A Register-Based Programming 91
The [ROUTe:]SCAN:MODE VOLT | RES | FRES is set with C1 and C0 in
the Scan Channel or Direct Control Register. Note that to obtain the
Thermistor reference temperature for Thermocouple measurements, you
must set the configuration bits for Thermistor. After you have obtained the
reference temperature, set the bits for Volts.
C1
0
0
1
1
C0
0
1
1
0
Volts
2-wire ohms
4-wire ohms
Thermistor
[ROUTe:]SCAN:PORT NONE | ABUS is set with A_D* and B_D* on the
Scan Channel Configuration or Direct Control Registers. Set both bits to
one for ABUS and to zero for NONE.
[ROUTe:]SETTling[:TIME] is set with the D3 to D0 bits in the Scan
Channel Delay Register. The bits form a number n (n is between 0 and 16),
and the delay is 2n µsec.
SYSTem
SYSTem:CDEScription? is a READ on the Manufacturer ID Register.
SYSTem:CTYPe? is a READ on the Device Type Register.
SYSTem:CPON can be achieved by setting the DIR bit true in the
Status/Control Register and setting VLD* false. This opens all channels
without a card reset.
TRIGger
TRIGger[:IMMediate] is equivalent to writing a one to TRG INT in the
Status Control Register. The register returns to zero after pulsing the
channel.
TRIGger:SOURce IMMediate and TRIGger:SOURce DBUS are executed
with the IMM EN and DBS EN bits in the Scan Control Register.
TRIGger:SOURce BUS and TRIGger:SOURce EXTernal are not
implemented at the register level. These commands both write to the TRG
INT bit when they are active and a trigger occurs.
TRIGger:SOURce HOLD is not implemented at the register level. It is in
the normal state when all trigger sources are disabled.
92 HP E1351A/53A Register-Based Programming
Appendix B
Register-Based Programming for Maximum Speed
This is an outline of the algorithm that needs to be followed to have the
HP E1326B 51⁄2 Digit Multimeter do high-speed scanning using the
HP E1351A 16-Channel FET Multiplexer. This procedure programs
the multimeter and downloads a scan list to the FET multiplexer so the
hardware controls the entire scanning process. The HP E1326B has several
things that should be understood when doing register programming.
1. Table B-1 on page 96 lists the multimeter’s commands. When doing
any of these commands, you are writing to registers which are read by the
multimeter’s voltmeter microprocessor. It is important to follow the
procedure in Figure B-3 on page 97 on how to send commands. This will
enable you to handshake with the E1326B microprocessor as you can easily
write commands faster than the processor can execute them.
2. In order to program the HP E1326B Multimeter to take readings with
the HP E1351A FET Multiplexer at its highest speed, do the commands
from Table B-1 on page 96. Note that all values in Table B-1 are specified
in decimal.
set the function
dcv
set the range
1V
Note: You must have a fixed range to do 13k. Auto range will do 2.5k.
set the aperture
10 µsec
Note: This will cause readings to be returned as 16 bits.
set the auto zero
off or once
set offset Compensation
off
set trigger source
Immediate
set trigger count
1
set trigger delay
0
set Sample Count
16
This should be the total number of A/D readings that you will take
(for example, once through a 16 channel list = 16, 10 times through
a 16 channel list = 160).
set sample Source
Timer
This is the time between A/D readings.
set sample Period
76µs
76 µsec is the minimum or fastest A/D time.
set trigger arm
armed
This arms the DVM to take all of the reading specified above.
Do not execute the next command yet. You still need to set the scan list in
the HP E1351A. Trigger immediate will start everything.
3. Now download the channel list to the HP E1351A
• Set CLR SCN in Scan Control Register to one, then back to zero in
order to clear the previous scan list.
• DIR in the Status/Control Register set to false.
Appendix B
HP E1351A/53A Register-Based Programming 93
Now write once for each channel in your scan list to the Channel
Configuration Register. This register loads up a FIFO that will later rotate
each time the HP E1326B issues a VM complete on the digital bus. If you
have more than one FET multiplexer, you must load up the FIFOs on each
one. The VLD bit specifies if a channel is on this card. Note that you must
load the entire scan list to each HP E1351A FET Multiplexer, with only the
VLD bit being different. The FIFO, and hence the scan list, can be a
maximum of 512 channels.
i.e. VLD
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A_D
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
B_D
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
C0-C1
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
volts
D0-D3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Now, do the following to the HP E1351A:
write to register:
4
6
4
4
decimal code:
8
Select direct control.
26
Enable digital bus triggering
continuous scanning, pointer
to beginning of scan.
0
Control back to DVM.
16
Close first channel.
The HP E1351A FET Multiplexer is now ready. It will advance to the next
channel every time a VM complete is received.
VM complete is a output from the multimeter that always occurs after an
A/D reading is complete. The digital bus cable wires the VM Complete
from the voltmeter to the Channel Advance on the FET multiplexer card.
The above command (to reg 6 value 26) enables digital bus triggering,
which enables the FET Multiplexer to use this signal. Make sure that you
have both a analog bus cable and a digital bus cable connected.
4. To start everything, issue the Trigger Immediate command from
Table B-1 on page 96, to the HP E1326B.
94 HP E1351A/53A Register-Based Programming
Appendix B
The number of readings specified in sample count will now be taken. If the
sample count is more than one scan, the scan list will start over again.
5. The voltmeter is now taking data which is being stored in the HP
E1326B hardware FIFO. With the 10 µsec aperture set, 512 16-bit readings
will collect here. In any other aperture only 256 32-bit readings will collect.
If you specified more than 512 readings, the computer needs to be removing
them from the FIFO while readings are being taken. The DVM FIFO is
connected to the HP E1326B VXI DATA BUFFER register.
To read the FIFO check the Data Ready bit in the Status Register to
determine if valid data is in the Data Buffer. Or, read the Data Buffer and
throw away any -1 readings, as a -1 decimal reading or all bits set to "1"
indicates invalid data. Keep reading the Data Buffer until you receive the
number of readings specified in Sample Count. Convert the readings from
voltmeter format to 32-bit real format.
6. To do debugging with the HP E1326B voltmeter, use the Query
Opcodes in Table B-1. This will verify that you have set the correct
parameters. Use the Send Error command (15) to get error codes back.
Refer to Table B-2 on page 98.
With the HP E1351A you cannot read back the contents in the FIFO,
therefore, debugging is difficult. Do verify that you get correct data back
from the Manufacturer ID Register and Device Type Register.
Appendix B
HP E1351A/53A Register-Based Programming 95
Multimeter
Command and
Parameter Opcodes
Table B-1 contains the multimeter command and parameter opcodes. The
opcodes used to query the parameter settings are also included.
Table B-1. Multimeter Command and Parameter Opcodes
Multimeter
Parameter
Command
Opcode
Parameter
Opcode
Value
Query
Opcode
Query
Response
Measurement
Function
04
00
01
02
DCV
ACV
(4-wire) OHMS
05
parameter
opcode
Range
02
00
01
02
03
04
05
125 mV / 256 Ω
1V / 2.048 kΩ
8V / 16.384 kΩ
64V / 131 kΩ
300V / 1.048 MΩ
Autorange
03
parameter
opcode
Aperture Time
00
00
01
02
03
04
05
06
267 ms
16.7 ms
320 ms
20 ms
2.5 ms
100 µs
10 µs
01
parameter
opcode
Autozero
08
00
01
02
On
Off
Once
09
parameter
opcode
Offset
Compensation
36
00
01
Off
On
37
parameter
opcode
Trigger Source
06
00
01
02
03 - 0A
Immediate
External
Hold
TTL trigger lines
0-7
29
parameter
opcode
Trigger Count
39
<upper byte>
<middle byte>
<lower byte>
1 - 16,777,215
(1),(3)
33
24-bit unsigned
number
(2)
Trigger Delay
23
<upper byte>
<middle byte>
<lower byte>
0 - 16.777215s
(1)
31
24-bit unsigned
number
(2)
Voltmeter
Complete Signal
Destination
40
8-bit binary number 0 - 7
(7)
(TTL trigger lines)
41
8-bit binary number
Sample Count
38
<upper byte>
<middle byte>
<lower byte>
1 - 16,777,215
(1),(4)
32
24-bit unsigned
number
(2)
Sample Source
07
00
01
02
03
Immediate
Timer
Software
Control Register
30
parameter
opcode
Sample Period
(5)
10
<upper byte>
<lower byte>
76µs - 65.534ms
(1)
11
16-bit unsigned
number
(2)
Software Sample
(6)
35
—-
—-
—-
...
Trigger Arm
12
00
01
Un-armed
Armed
—-
—-
Trigger Immediate 13
—-
—-
—-
...
Send Error
—-
—-
—-
—-
15
Table B-1 Continued on Next Page
96 HP E1351A/53A Register-Based Programming
Appendix B
Table B-1. Multimeter Command and Parameter Opcodes (continued)
(1) Specified as a 2’s complement binary number. For three byte parameters <upper byte> = value shifted 16 bits to the
right (>>16), <middle byte> = value shifted 8 bits to the right (>>8), <lower byte> = value. For two byte parameters
<upper byte> = value shifted 8 bits to the right (>>8), <lower byte> = value & 0xFF.
(2) Reading the Query Response register two times (16-bit number) or three times (24-bit number) returns in order; the
high byte, middle byte, and low byte.
(3) A parameter value of 0 sets infinite triggers per trigger arm.
(4) A parameter value of 0 sets infinite samples per trigger.
(5) Set when Sample Source is Timer.
(6) Used when Sample Source is Software. The first measurement of each burst occurs when the trigger signal is
received (e.g. Trigger Immediate). Subsequent measurements in the burst occur when Software Sample is written to the
Command register.
(7) Up to seven VXIbus TTLTrg trigger lines can be selected. 01 selects line 0, FF selects all lines.
Figure B-3. Configuring the Multimeter
Appendix B
HP E1351A/53A Register-Based Programming 97
Multimeter
Register-Based
Programming Error
Codes
Multimeter error codes related to register-based programming are listed in
Table B-2.
Table B-2. Multimeter Register-Based Programming Error Codes
Error Code
Cause
0016
No error has occurred since the last error code was read.
0116
Unrecognized command opcode.
0216
A parameter was required but a command was received.
0316
A parameter is invalid or out of range for the specified command.
0416
Reading overrun. The data buffer is full and another measurement is taken.
This error also occurs when a new command (opcode) is received while the
multimeter is placing a reading in the data buffer. Trigger Arm is disabled.
0516
The command or parameter received is not allowed in the two byte reading
mode (10 µs aperture time).
0C16
Command is terminated by another command.
0E16
The aperture time is longer than the sample rate.
0F16
Input overload. A potentially damaging voltage has been applied to the
multimeter:
> +- 40V between HI and LO or HI and COMMON with the range <= 8V
> +- 40V between LO and COMMON on any range
Under this condition, the multimeter disconnects itself from the input.
A new range must be specified to restore operation.
98 HP E1351A/53A Register-Based Programming
Appendix B
s
Appendix C
HP E1351A/53A FET Multiplexer Error
Messages
Table C-1 lists the error messages associated with the multiplexer modules
programmed with SCPI commands. See the HP E1406A Command Module
User’s Manual for complete information on error messages.
Table C-1. 16-Channel FET Multiplexer Error Messages
No.
Title
Potential Causes
–211
Trigger Ignored
Trigger received when scan not enabled. Trigger received after scan
complete. Trigger too fast.
–213
INIT Ignored
Attempting to execute an INIT command when a scan is already in
progress.
–224
Illegal Parameter Value
Attempting to execute a command with a parameter not applicable to the
command.
1500
External Trigger Source Already
Allocated
Assigning an external trigger source to a switchbox when the trigger
source has already been assigned to another switchbox.
2000
Invalid Card Number
Addressing a module (card) in a switchbox that is not part of the
switchbox.
2001
Invalid Channel Number
Attempting to address a channel of a module in a switchbox that is not
supported by the module (for example, ch. 99 of multiplexer module).
2006
Command Not Supported On
This Card
Sending a command to a module (card) in a switchbox that is
unsupported by the module.
2008
Scan List Not Initialized
Executing a Scan without the INIT command.
2009
Too Many Channels in Channel
List
Attempting to address more channels than available in the switchbox.
2010
Scan Mode Not Allowed On
Thi Card.
Attempting to execute a SCAN:MODE which is not supported.
2011
Empty Channel List
No valid channels in <channel_list>.
2012
Invalid Channel Range
Invalid channel(s) specified in SCAN <channel_list> command.
Attempting to begin scanning when no valid channel list is defined.
2017
Incorrect ARM:COUNt
Attempting to run a downloaded scan list with ARM:COUNt set to value
other than 1.
2600
Function Not Supported On
This Card
Sending a command to a module (card) in a switchbox that is not
supported by the module or switchbox.
2601
Channel List Required
Sending a command requiring a channel list without the channel list.
Appendix C
HP E1351A/53A FET Multiplexer Error Messages 99
Notes
100 HP E1351A/53A FET Multiplexer Error Messages
Appendix C
Index
HP E1351A/53A FET Multiplexer User’s Manual
*CLS, 76
*ESE, 76
*ESE?, 76
*ESR?, 76
*IDN?, 76
*OPC, 76
*OPC?, 76
*RCL, 76
*RST, 76 - 77
*SAV, 76
*SRE, 52, 76
*SRE?, 76
*STB?, 52, 76
*TRG, 76 - 77
*TST?, 76 - 77
*WAI, 76
A
A16 Address Space, 81 - 82
Abbreviated Commands, 54
ABORt, 90
ABORt Command, 56, 77
Adding Components, 23
Address
A16 address space, 81
base, 83
channel, 30
LADDR, 19
logical, 14, 18 - 19
mainframe, 14
multiple-module switchbox, 18
primary, 14
registers, 81 - 82
scanning voltmeter, 15, 18 - 19
secondary, 14, 18
single-module switchbox, 18
switch, setting, 19
switchbox, 14, 18
Advancing the Channel List, 36, 45
Analog Bus
cable, 26 - 27
cables, 42
connector, 12, 26 - 27
port, 68
ARM Subsystem, 57, 77
ARM:COUNt, 39, 57, 90
ARM:COUNt?, 57
Attenuator Configuration, 23
B
Backplane
triggering, 15
Bank
common, 12
isolating, 32
one (1), 12, 32
zero (0), 12, 32
Base Address, 83
Bit Map
descriptions, register, 86
device type register, 85 - 86
direct channel configuration register, 85, 89
direct control register, 85, 90
manufacturer ID register, 84, 86
scan channel configuration register, 85, 89
scan channel delay register, 85, 88
scan control register, 85, 88
status/control register, 85, 87
Block Diagram, 13
Boolean Command Parameters, 55
C
Cables
analog bus, 26 - 27, 42
custom, 15 - 16, 26
digital bus, 15, 26 - 27, 42
ribbon, 12
shielded, 24
Card ID Switch, 21
Card Numbers, 18 - 19, 30
multiple-module switchbox, 18
scanning voltmeter, 18 - 19
single-module switchbox, 18
CAUTIONS, 17
Certification, 5
Channel
address, 30
advance triggering, 12, 15
advancing, 36
closing, 16, 29, 33 - 35, 63
HP E1351A/53A FET Multiplexer User’s Manual Index
101
connecting to direct terminals, 32 - 33
connecting to tree terminals, 34
list, 29, 65
numbers, 11
opening, 29, 64
query closure, 64 - 65
scanning, 65
scanning a range of, 36 - 37
scanning switchbox, 45, 66
selecting, 29
Closing
bank 0 channels, 32
bank 1 channels, 32
channels, 16, 29, 33 - 35, 63
FETs, 34, 69
tree isolation switches, 12, 68
*CLS, 76
Command Reference, 53 - 78
Commands
abbreviated, 54
IEEE 488.2, 53, 76
implied, 54
keyword, 54
linking, 55
optional, 54
optional parameters, 55
parameters, 55
quick reference, 77
scanning switchbox channels, 45 - 46
SCPI, 53
SCPI format, 53
separator, 54
types, 53
Comment sheet, reader, 9
Common
bank, 12
terminals, 12
Common (*) Commands, 53
*CLS, 76
*ESE, 76
*ESR?, 76
format, 53
*IDN?, 76
list of, 76
*OPC, 76
*OPC?, 76
quick reference, 77
*RCL, 76
*RST, 76 - 77
*SAV, 76
*SRE, 52, 76
*SRE?, 76
*STB?, 52, 76
*TRG, 76 - 77
*TST?, 76 - 77
*WAI, 76
102
Component Assembly, description, 11
Configuring
HP E1351A/53A module, 17 - 28
scanning voltmeter, 42
Conformity, declaration, 7
Connecting
analog bus cables, 42
channels to direct terminals, 32 - 33
channels to tree terminals, 35
digital bus cables, 42
field wiring, 24
mainframe to multimeter, 38
multimeter to mainframe, 38
multimeters, 26 - 27, 34
multiple modules together, 12
signal generators, 26
stand-alone multimeters, 12, 26
switchbox channels to tree terminals, 34
user inputs, 22
Connections
analog bus, 12
multimeter, 12, 34
scanning voltmeter, 14
terminal module, 12, 24
tree terminals, 12
Connector
analog bus, 26 - 27
digital bus, 26 - 27
pin-out diagram, 22
Continuous Scans, 39, 60
Converting
thermistor resistance to a temperature, 44
thermistor temperature to a voltage, 44
Current
maximum allowed, 17, 79
shunt configuration, 23
Custom Cables, 15 - 16, 26
D
Declaration of conformity, 7
Description, 11
Device Type Register, 85 - 86
Digital Bus, 15
cable, 15, 26 - 27
cables, 42
ground, 15
handshake lines, 15
handshaking, 69
port, 15
triggering, 15 - 16, 50 - 51, 74
Direct Channel Configuration Register, 85, 89
Direct Control Register, 85, 90
Direct Terminals
connecting switchbox channels, 32 - 33
description of, 12
HP E1351A/53A FET Multiplexer User’s Manual Index
isolating, 33
measurement accuracy, 33
Discrete Command Parameters, 55
DISPlay Subsystem, 58 - 59, 77
DISPlay:MONitor:CARD, 58
DISPlay:MONitor[:STATe], 59, 90
Documentation history, 6
Downloading Scan List, 39 - 41, 65
H
E
Errors
codes, register-based, 98
messages, 72, 99 - 100
numbers, 72, 99 - 100
queue, 72
*ESE, 76
*ESE?, 76
*ESR?, 76
Event In Port, 15, 45, 74
scanning with, 49
trigger input, 75
Examples
connecting channels to tree terminals, 35
making 2-wire ohms measurements by scanning, 38
making 4-wire ohms measurements by scanning, 38
making multiple scans, 39
making voltage measurements by scanning, 36 - 37
scan complete monitor, 52
scanning using "Trig Out" and "Event In" ports, 49
scanning using digital bus triggering, 50 - 51
scanning using scanning voltmeter, 51
scanning using stand-alone multimeter, 50
scanning with external instruments, 48
Executing Commands, 90
External
instruments, scanning with, 45, 48 - 50, 66
trigger inputs, 74
trigger port, 48 - 50
triggering, 15
F
Field Wiring, 24
Format
common commands, 53
SCPI commands, 53
Four-wire Ohms Measurements, 35, 38, 67
Front Panel, 22
Handshake Lines
multimeter, 36
High-speed
operation, 12
scan rate, 36
scanning, 93
switching, 11 - 12
temperature measurements, 44
HP 3457A Digital Multimeter, 48 - 50, 66
HP E1326B Multimeter, 51
HP-IB
group execute trigger (GET), 74
interface select code, 14
serial poll, 52
service request (SRQ), 52
I
ID Register, 84, 86
*IDN?, 76
IEEE 488.2 Commands
See Common (*) Commands
Implied Commands, 54
Initial Operation, 16
INITiate Subsystem, 60 - 61, 77
INITiate:CONTinuous, 39, 60, 90
INITiate:CONTinuous?, 61
INITiate[:IMMediate], 61, 91
Interrupt Line, 20
IRQ Switch, 20
K
Keywords, rules for use, 54
L
LADDR, 19
Linking Commands, 55
Logical Address, 14, 18 - 19
changing, 19
factory setting, 19
multiple-module switchbox, 18
scanning voltmeter, 18 - 19
single-module switchbox, 18
switch, setting, 19
Low-pass Filter Configuration, 23
G
Getting Started, 11 - 16
HP E1351A/53A FET Multiplexer User’s Manual Index
103
M
Mainframe Address, 14
Making
2-wire ohms measurements by scanning, 38
4-wire ohms measurements by scanning, 38
continuous scans, 39, 60
measurements, 34
multiple scans, 39
voltage measurements by scanning, 36 - 37
Manufacturer ID Register, 84, 86
Measurement Complete Port, 15
Measurements
2-wire ohms, 38, 67
4-wire ohms, 35, 38, 67
direct terminal accuracy, 33
high-speed temperature, 44
making, 34
temperature using thermocouples, 43 - 44
thermocouple compensated, 44
voltage, 34, 36 - 37
measuring
resistance of a thermistor, 43
signals on closed channel, 12
temperature using thermocouples, 43 - 44
thermocouple temperature using multimeter, 43 - 44
Model Codes, 86
Module
block diagram, 13
card numbers, 18 - 19, 30
configuring, 17 - 28
connecting multiple, 12
connecting to multimeter, 12, 26 - 27, 34, 42, 51
connector pin-out diagram, 22
description, 11
error messages, 99 - 100
error numbers, 99 - 100
front panel, 22
ID, 21
register-based programming, 81 - 98
registers within A16 address, 82
secondary address, 14
specifications, 79 - 80
terminal, 11
Multimeter
command and parameter opcodes, 96
connecting, 26 - 27
connecting to, 34, 42, 51
connecting to multiplexer, 12
connection points, 12
digital bus port, 15
handshake lines, 36
high-speed scanning, 93
measuring thermocouple temperature, 43 - 44
primary address, 14
104
scanning voltmeter, 42, 51
synchronize E1351A/53A to, 48 - 49
to mainframe connection, 38
Multiple
modules, 18 - 19, 30
scans, 39
SCPI commands, linking, 55
N
Numeric Command Parameters, 55
O
Ohms Measurements, 35, 38
*OPC, 76
*OPC?, 76
Opcodes, multimeter, 96
Opening
channels, 64
tree isolation switches, 32 - 33
Opening Channels, 29
Operation Status Register, 52, 70
bit value, 70
setting bit 8, 70
Optional
command parameters, 55
commands, 54
OUTPut Subsystem, 62, 77
OUTPut[:STATe], 62, 91
OUTPut[:STATe]?, 62
P
Parameters, 55
Pin-out Diagram, 22
Polling, Status Register, 52
Primary Address, 14
Program Examples
2-wire ohms measurements by scanning, 38
4-wire ohms measurements by scanning, 38
configuration commands required, 14
making continuous scans, 39
making multiple scans, 39
scan complete monitoring, 52
scanning a switchbox, 40 - 41
scanning using "Trig Out" and "Event In" ports, 49
scanning using digital bus triggering, 50 - 51
scanning using external instruments, 66
scanning using scanning voltmeter, 51
scanning using stand-alone multimeter, 50
scanning with a multimeter, 42
scanning with a scan list, 41
scanning with external instruments, 48
scanning without a scan list, 40
verify initial operation, 16
HP E1351A/53A FET Multiplexer User’s Manual Index
voltage measurements by scanning, 36 - 37
Programming
register-based, 81 - 98
Programming Language, 16
Q
Query
channel closure, 16, 33, 64 - 65
error queue, 72
number of scanning cycles, 57
scan mode, 67
scan port, 68
scanning state, 61
settling time, 69
trig out port state, 62
trigger sources, 75
Quick Reference
common commands, 77
SCPI commands, 77
R
Range of Channels, 36 - 37
*RCL, 76
READ Registers, 84
Reader comment sheet, 9
Register-Based Programming, 81 - 98
error codes, 98
executing commands, 90
for maximum speed, 93
maximum speed using HP E1326B, 93
register addressing, 81
register bit descriptions, 86
register descriptions, 84
Registers
addressing, 81 - 82
bit descriptions, 86
descriptions, 84
device type, 85 - 86
direct channel configuration, 85, 89
direct control, 85, 90
ID, 84, 86
offset, 84
operation status, 52, 70
READ, 84
scan channel configuration, 85, 89
scan channel delay, 85, 88
scan control, 85, 88
status, 52, 70
status/control, 85, 87
within A16 address, 82
WRITE, 84
Ribbon Cable, 12
ROUTe: Subsystem, 63 - 69
ROUTe:CLOSe, 63, 91
ROUTe:CLOSe?, 33, 64
ROUTe:OPEN, 64, 91
ROUTe:OPEN?, 33, 65
ROUTe:SCAN, 65 - 66, 91
ROUTe:SCAN:MODE, 67, 92
FRES, 33, 38, 67
NONE, 67
RES, 67
VOLT, 67
ROUTe:SCAN:MODE?, 67
ROUTe:SCAN:PORT, 33, 68, 92
ABUS, 12, 33 - 34, 38, 68, 92
NONE, 32 - 33, 68, 92
ROUTe:SCAN:PORT?, 68
ROUTe:SETTling[:TIME], 69, 92
ROUTe:SETTling[:TIME]?, 69
*RST, 76 - 77
S
Safety warnings, 6, 17
*SAV, 76
Scan Channel Configuration Register, 85, 89
Scan Channel Delay Register, 85, 88
Scan Complete Bit, 52
Scan Control Register, 85, 88
Scanning
channels, 65
commands used, 45 - 46
continuous cycles, 39, 60
cycles (ARM), 57
multiple cycles, 39
ohms measurements, 38
query state, 61
range of channels, 36 - 37
starting cycle, 61
steps to take, 39
switchbox channels, 45
trigger sources, 45, 47, 74
using "Event In" ports, 49
using "Trig Out" ports, 49
using bus triggers, 75
using external triggers, 75
using scanning voltmeter configuration, 51
using stand-alone multimeters, 50
voltage measurements, 36 - 37
with downloaded scan list, 41
with external instruments, 45, 48
without downloaded scan list, 40
Scanning List
automatic downloading, 12
downloading, 39, 65
scanning with downloading, 41
scanning without downloading, 40
Scanning Voltmeter
analog bus connector, 12
HP E1351A/53A FET Multiplexer User’s Manual Index
105
card numbering, 30
card numbers, 18 - 19
configuration, 12, 14, 51
configuration with multimeter, 42, 51
continuous scanning, 60
logical addresses, 18 - 19
setup, 15
Schematic, simplified, 13
SCPI Commands, 53
abbreviated, 54
ABORt, 56, 77
ARM subsystem, 57, 77
DISPlay subsystem, 58 - 59, 77
format used, 53
implied, 54
INITiate subsystem, 60 - 61, 77
linking, 55
long form, 54
optional, 54
optional parameters, 55
OUTPut subsystem, 62, 77
parameters, 55
quick reference, 77
reference, 55, 77
ROUTe: subsystem, 63 - 69
short form, 54
STATus subsystem, 70, 77
SYSTem subsystem, 71 - 72, 77
TRIGger subsystem, 73 - 75, 77
Secondary Address, 14, 18
multiplexer, 14
switchbox, 14
Selecting
channels, 29
interrupt line number, 20
Service Request (SRQ), 52
Setting
address switch, 19
card ID switch, 21
interrupt line number switch, 20
scanning cycles, 57
Shielded Cables, 24
Shock Hazard, 17
Signal
conditioning components, adding, 23
generators, connecting, 24, 26
measuring on a closed channel, 12
Specifications, 79 - 80
Speed
See High-speed
*SRE, 52, 76
*SRE?, 76
Standard Commands for Programmable Instruments
See SCPI Commands
Static Electricity, 17
Status Register, 52, 70
106
polling, 52
STATus Subsystem, 70, 77
Status/Control Register, 85, 87
STATus:OPERation:ENABle, 52, 70
STATus:OPERation[:EVENt]?, 52, 70
*STB?, 52, 76
Switchbox
addressing, 14, 18
card numbering, 18, 30
channels to tree terminals, 34
commands for scanning, 45 - 46
configuration, 14
connecting channels to direct terminals, 32 - 33
continuous scanning, 60
description of, 14
errors, 72
multiple scanning cycles, 39
resetting, 16
scanning, 40 - 41
scanning channels, 45, 66
scanning range of channels, 36 - 37
secondary address, 14
setup, 14
Switches
card ID, 21
interrupt line, 20
IRQ, 20
logical address, 19
tree isolation, 12, 32 - 34, 68
Switching Speeds, 11 - 12
Synchronize E1351A/53A to HP 3457A Multimeter,
48 - 49
SYSTem Subsystem, 71 - 72, 77
SYSTem:CDEScription?, 71, 92
SYSTem:CPON, 71, 92
SYSTem:CTYPe?, 72, 92
SYSTem:ERRor?, 72
T
Temperature Measurements, 43 - 44
Terminal Block
See Terminal Module
Terminal Module, 11
adding components to, 23
connections, 12, 24
direct terminals, description of, 12
thermocouple, 43
wiring guidelines, 24
wiring to, 25
Thermistor, 43 - 44
measure resistance of, 44
resistance, converting to a temperature, 44
temperature, converting to a voltage, 44
Thermocouple, 43
compensated measurements, 44
HP E1351A/53A FET Multiplexer User’s Manual Index
terminal module (E1353A), 43
Tree Isolation Switch, 12
closing FETs, 34
disabling, 68
enabling, 68
opening, 32 - 33
Tree Terminals
connecting to switchbox channels, 34
description of, 12
for 4-wire ohms measurement, 35
*TRG, 76 - 77
Trig Out Port, 45, 48, 62
disabling, 62
enabling, 62
query state, 62
scanning with, 49
TRIGger Subsystem, 73 - 75, 77
TRIGger:SOURce, 45, 74 - 75
BUS, 36, 45, 74, 92
DBUS, 12, 15, 36, 39, 45, 74, 92
EXTernal, 36, 45, 74, 92
HOLD, 45, 74, 92
IMMediate, 12, 39, 74, 92
TRIGger:SOURce?, 75
TRIGger[:IMMediate], 45, 73, 92
Triggering, 15
channel advance, 12, 15
delay, 69
digital bus, 15 - 16, 50 - 51, 74
external inputs, 74
source, 12, 45, 47, 74
*TST?, 76 - 77
Two-wire Ohms Measurements, 38, 67
V
Voltage
maximum allowed, 17, 79
measurement, 34, 36 - 37
Voltmeter Complete Port, 50
pulse output, 49
VXIbus
backplane, 15
instrument description, 14
W
*WAI, 76
WARNINGS, 6, 17
Warranty, 5
Wiring
connecting field, 24
guidelines, 24
to terminal module, 25
WRITE Registers, 84
U
Understanding the HP E1351A/53A, 45 - 52
Using
bus triggers, 74 - 75
external trigger inputs, 74
external triggers, 75
HP 3457A multimeter, 48 - 50, 66
HP E1326B multimeter, 51
HP E1351/53A multiplexer, 29 - 44
scan complete bit, 52
scanning trigger sources, 45, 47
scanning voltmeter configuration, 51
stand-alone multimeters, 50
HP E1351A/53A FET Multiplexer User’s Manual Index
107
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