Agilent E1442A Users Guide

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Contents

HP E1442A Form C Switch Module User’s Manual

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

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

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

Declarati on of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

Chapter 1. HP E1442A M odule Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Graphical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Module Use and Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Setting the Module Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Setting Interrupt Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Connectin g User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Standar d Form C Configurati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Option 010 Form C Configura ti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Option 020 Form A Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Using the Internal Bu ses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

WARNINGS and CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Installing the Switch Module in a Mainframe . . . . . . . . . . . . . . . . . . . . . . . 24

Wiring the Term inal Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Attaching the Termi na l Modu le to the Swi tch Module . . . . . . . . . . . . . . . . . . 27

Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Programming the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Specifying SCPI Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Chapter 2. HP E1442A Switchbox Application Examples . . . . . . . . . . . . . . . . . . 31

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

How to Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Using Scanning Trigge r Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Scannin g with External I nstruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Example: Scanning with External Device . . . . . . . . . . . . . . . . . . . . . . . 33

Example: Sc a nning Using Trig Out and Tr ig In Ports . . . . . . . . . . . . . . . . . 35

Using the Scan Comple t e Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Saving and Recalling States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Saving States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Recalling States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Detecti ng E rror Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Synchroni zi ng the Form C Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Chapter 3. HP E1442A Switchbox Command Re fer enc e . . . . . . . . . . . . . . . . . . . 41

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

Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Common Com mand Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

SCPI Command For ma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

HP E1442A User’s Manual Table of Contents 1

Linking Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

SCPI Command Re fe re nc e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

ABORt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

ARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

:COUNt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

:COUNt? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

DISPlay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

:MONitor:CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

:MONitor:CARD? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

:MONitor[:ST ATe] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

:MONitor[:STATe]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

INITiate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

:CONTinuou s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

:CONTinuous? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

[:IMMediate] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

OUTPut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

:ECLTrgn[:STATe] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

:ECLTrgn[:STATe]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

[:EXTernal][:STAT e ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

[:EXTernal][:STAT e ]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

:TTLTrgn[:STATe ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

:TTLTrgn[:STATe ]? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

[ROUTe:] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

CLOSe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

CLOSe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

OPEN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

SCAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

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

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

STATus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

:OPER:CONDition? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

:OPERation:E NABle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

:OPERation:E NABle? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

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

:PRESet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

SYSTem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

:CDEScription? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

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

:CTYPe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

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

Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

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

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

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

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

SCPI Command Quick Referenc e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

IEEE 488.2 Common Command Reference . . . . . . . . . . . . . . . . . . . . . . . . 72

Appendix A. HP E1442A Form C Switch Specificati ons . . . . . . . . . . . . . . . . . . . 73

2 Table of Contents HP E1442A User’s Manual

Appendix B. HP E1442A Form C Switch Register Prog ra mming & Definit ions . . . . . . 75

About This App en dix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Addressing the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

The Base Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Reading or W rit ing to HP E1442A Registers . . . . . . . . . . . . . . . . . . . . 78

Reading the HP E1 442A Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Writing to HP E 1442A Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Switch Enab le Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Programming Exa mp les . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Appendix C. HP E1442A Form C Switch Error Message s . . . . . . . . . . . . . . . . . . 91

Error Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Appendix D. HP E1442A Option 010 Term inal Module . . . . . . . . . . . . . . . . . . . 93

About This App en dix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Straight -Through Configuration Exa mple . . . . . . . . . . . . . . . . . . . . . . . . 95

Resistor Divider Confi guration Example . . . . . . . . . . . . . . . . . . . . . . . . . 96

Low-Pass Filte r Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . . 97

Common Terminal Pullup Configuration Example . . . . . . . . . . . . . . . . . . . . 98

Normally Cl osed Terminal Pul lup Configuration Example . . . . . . . . . . . . . . . . 99

Normally Ope n T er mi nal Pullup Configuration Examp le . . . . . . . . . . . . . . . . 100

Divider with Filter Configuration Example . . . . . . . . . . . . . . . . . . . . . . . . 101

Differenti a l Divider or Filter Configuration Example . . . . . . . . . . . . . . . . . . 102

HP E1442A User’s Manual Table of Contents 3

Notes

4 Table of Contents HP E1442A User’s Manual

Certification

Hewlett-Pac kard Compa ny certif ies that this product met its published spec ifica tion s at the time of shipment from the factory. Hewl et t Packard fur th er cer tif ies that its cal ib rati on me asu re ment s are trace abl e to the Unite d Stat es Nation al Instit ut e of Stand ard s and Technology (for mer l y Nati onal Bur ea u of Sta ndar ds ), to the exte nt allo wed by that orga ni zati on’ s cal ib rat ion f ac ili t y, and t o the c alibration facilities of ot her Inte rna tional Standards Organ iz ati on members.

Warranty

This Hewlett-Packa rd product is warrante d against defect s in mater ial s and workmanship for a period of three years from date of shipment. Duration and conditions of wa rrant y for this product may be superseded when the product is integrat ed into (bec omes a part of) other HP products. During the warranty period, Hewl ett-Pac kard Com pany wil l, at its option, eithe r repair or replac e products which prove to be defective.

For warrant y servic e or repai r, thi s produc t must be retur ned to a service faci lity de sign at ed by Hewlet t-P ac kard (HP ). Buyer sha l l prepay shipping cha rges to HP and HP shall pay shipping c harge s to retu rn the product to Buyer. However, Buye r shall pay all shi ppi n g charges , dut ies, and ta xe s for produc t s ret urn ed to HP fr om an ot her count ry.

HP warrants that its software and firmware designated by HP for use with a product will execute its programm ing inst ruct ions when properly instal led on that product. HP does not warrant that the operation of the product , or soft wa re, or firmwa re will be uninterrupted or error free.

Limitation Of Warranty

The foregoing war ra nty sh all not apply to de fect s resul ting from imprope r or inadequate maint e nan ce by Buyer, Buyer- sup plie d pr oducts or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site pr ep ar at ion or ma int ena nce.

The design and imple men ta tio n of any circui t on this produc t is the sole respon sibi l ity of the Buyer. HP does not war rant the Buye r’s circuitry or malf unc tion s of HP products that result from the Buyer’ s circui try . In addition, HP does not warra nt any dama ge tha t occurs as a result of the Buyer’s circui t or any defects that resul t fr om Buyer-supplied products.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIE D. HP SPECIFICALLY DI SCLAI MS THE IMPLI ED W ARRANTIE S OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Exclusive Remedie s

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REM EDI ES. 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 inform at i on c ont ained in this docum en t is subject to chan ge wi t hout noti ce . HEWLETT-PAC KARD (HP) MAKE S NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIM ITE D TO, THE IMPLI ED WARRANTIES OF MERCHANTABILITY AND FITNES S FOR A PARTICULAR PURPOSE. HP shall not be liable for errors contained herein or for inci de nt al or consequential da mag es in conne ct ion wi t h the fu rnis hi ng, perfo rm a nce or use of th is mat er ial . This document contains proprietary information which is protected by copyright. All rights are reserved. No part of this document may be photocopied, repr oduc ed , or transl ate d to anothe r lan gua ge wi thout t he prior wr itten cons en t of Hewlet t-P ac kar d Compa ny. HP assume s no respons ibility for the use or reli ab il i t y of it s so ft wa r e on equi pm ent that is not fur ni shed by HP.

U.S. Government Restricted Rights

The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as "commercial computer soft war e" as defin ed in DFARS 252. 227- 701 3 (Oct 19 88), DFARS 252.211-7015 (May 1991) or DFARS 252. 22 7-7 014 ( Jun

1995), as a "commerci al item " as define d in FAR 2.101(a) , or as "Restric ted com puter softwar e" as defin ed in FAR 52.22 7-19 (Jun

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

HP E1442A 64-Cha nne l Form C Swi tch M odu le Use r’s Manu al

Edition 2

HP E1442A 64-Channel Form C Switch Module User’s Manual 5

Documentatio n 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 increm ents by 1 whenever the manua l is revised . Updates, whic h are issued betwee n Edit ions , contain repl a cem ent pa ges 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 inf orma t io n for the previ ou s Edi ti on. Each new Ed iti on or Upda te also incl ude s a revis ed c opy of this doc um en tat io n hi story page.

Edition 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . July 1994

Edition 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 1996

Safety Symbols

Instruction ma nual sym bol affixed to prod uct. Indicates that the user must refer to the manual for specific WARNING or CAUTION information to avoid personal injury or dama ge t o t he pr o du ct .

Indicates the field wiring terminal that must be connec ted t o eart h groun d bef or e opera t ing the equipment—protects against electrical sho ck in ca se of fault.

Fram e or cha ss is gro und t er m i nal — ty pi -

cally connects to the equipment’s metal frame.

WARNING

CAUTION

Alternating curre nt (AC) .

Direct curr en t (DC).

Indicates hazardous voltages.

Calls at te nt i on t o a pr oce dure, prac ti c e, or condit ion t hat co ul d ca use bodi l y inj ury or death.

Calls at te nt i on t o a pr oce dur e, pr ac ti c e, or c on dition t hat co ul d pos sibl y ca us e da m age to equipment or permanent loss of data.

WARNINGS

The following ge ner al safet y prec aut io ns mus t be obse rv ed du ring al l phas es of operati on , servi ce , and repai r of this prod uct . Failure to compl y with thes e pr ecaut i ons or with spec i fic warni ngs elsewhe re in this manua l violat es safety stand ard s of desig n, manufactur e, and inten ded use of the produc t. Hewl ett- Pac kar d Com pan y assum es no lia bi lit y for the custo mer’ s fai lure to comply with these requirements.

Ground the e qui pm en t: For Saf ety Clas s 1 eq uipmen t (e qu ipment ha ving a protective ea rt h t erminal ) , a n uni nt errupt ib le safety earth

ground must be provide d from the ma in s power sour ce to the prod uct input wi ring ter m inal s or suppli ed power cable .

DO NOT operat e the pr oduc t in an expl os ive atmo sph er e or in the pres en ce of flammabl e gase s or fume s.

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: Operati ng pers onne l must not re move equi pm e nt cover s or shiel ds . Proc ed ure s invo lv in g the rem ova l of covers or shi el ds are for use by se rv ic e- t ra ined personnel only. Under certain cond iti ons, dangerous vol ta ge s m ay exist even wit h the equipment switc hed off. To avoid dange rous e lectr ical shock , DO NOT perform proc edu res involvi ng cover or shield removal unless you are qualified to do so.

DO NOT operate damaged equipment: Whe ne ver it i s possi bl e that the sa fety prot e cti on fe at ur es bui l t int o thi s produc t have bee n im paired, eithe r through phys ical da m age , exces sive mois ture , or any other reas on, REMOVE POW E R and do not use the produc t unt il safe operation can be verifie d by serv ice-t ra ined pers onn el. If necessary, return the produ ct to a Hewlett -Pac kar d Sales a nd Se rvice 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 resus ci t at i on, is pr esent.

DO NOT substitute parts or modify equipment: Because of the danger of intr oduc i ng addi tional hazards , do not inst all subst itut e parts or perform any unaut hor ized modi ficat io n to the produc t. Retur n the produ ct to a Hewlet t-P ac kard Sa les and Se rvic e Offi ce for service and repair to ensure that safety features are maintained.

6 HP E1442A 64-Channel Form C Switch Module User’s Manual

Declaration of Conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacture r ’s Name : Hewlett-Pa ck ard Com pa ny

Lovela nd M a nufacturi ng Ce nter

Manufacture r’s Addre s s: 815 14th Stre et S.W .

Loveland, Colorado 80537

declares, that the produc t:

Product Name: 64-Channel For m C GP Switch Module

Model Number: HP E1442A

Product Options: All

conforms to the followi ng Produc t Spe cific ati ons:

Safety: IEC 1010-1 (1990) Incl . Amend 1 (1992) /E N610 10-1 (1993)

CSA C22.2 #1010.1 (1 992) UL 1244

EMC: CISPR 11:1990/ EN5 5011 (1991 ): Group1, Cl ass A

IEC 801-2:1991/ E N5008 2-1 (1 992) : 4kVCD IEC 801-3:1984/ E N5008 2-1 (1 992) : 3 V/m IEC 801-4:1988/ E N5008 2-1 (1 992) : 1kV Power Lin e, . 5kV Sig nal Line s IEC 801-5:1992( DRAFT ) 3kV Low Ener gy, 1kV High Ener gy

Supplementary Information: The product herewith complies with the r equirements of th e Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC .

Tested in a typic al confi gur at ion in an HP C-size VXI mainfr am e .

July 28, 1994 Jim White, QA Manager

European c ont act : You r loca l He wle tt-Packard Sa les a nd Se rvi ce Offic e or Hewl ett- Pac ka rd GmbH, De pa rtme nt HQ-TRE, Herren be rge r Straß e 130, D-71034 Böbl in gen, Germa ny (FAX +49- 7031 -14- 3143 ).

HP E1442A 64-Channel Form C Switch Module User’s Manual 7

Notes

8 HP E1442A 64-Channel Form C Switch Module User’s Manual

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HP E1442A 64-Channel Form C Switch Module User’s Manual

Edition 2

You can help us improve our manuals by sha rin g your comme nts a nd sug ge sti ons. In appreciat ion of your time, we will enter you in a quarterly drawing for a Hewlett -Pac kar d Palmtop Per sonal Computer (U.S. government employees

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Please list the syste m contr olle r, oper ati ng syste m , progr am mi ng language , and plug-in mo dule s you are using.

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10 HP E1442A 64-Channel Form C Switch Module User’s Manual

Using This Chapter

This chapter provides one page of general module information follow ed by the tasks you must perform to set up your module. It also provides information to verify that your inst allation was successful . Chapter contents include:

Chapter 1

HP E1442A Module Setup

• General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

• Graphical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

• Module Use and Address Selection. . . . . . . . . . . . . . . . . . . . Page 13

• Setting the Module Address Switch . . . . . . . . . . . . . . . . . . . Page 14

• Setting Interrupt Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

• Connecting User Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

• Standard Form C Configuration . . . . . . . . . . . . . . . . . . . . . . Page 17

• Option 010 Form C Configuration. . . . . . . . . . . . . . . . . . . . . Page 18

• Option 020 Form A Configuration . . . . . . . . . . . . . . . . . . . . Page 19

• Using the Internal Buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

• WARNINGS and CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . Page 22

• Installing the Switch Module in a Mainframe. . . . . . . . . . . . Page 24

• Wiring the Terminal Module. . . . . . . . . . . . . . . . . . . . . . . . . Page 25

• Attaching the Terminal Module to the Switch

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27

• Initial Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28

General Information

The terms "Form C switch" and "switch" are both used in this manu al to refer to the HP E1442A 64-Channel Form C Switch Module which is a VXIbus C-size register-based slave device that can operate in a C-size VXIbus mainframe or a VMEbus mainframe.

The switch "instrument" is the firmware running in the E1405/E1406 Command Mod ule. This firmware is the instrum ent driver providi ng SC PI (Standard Commands for Programm able Instrum en ts) programm ing capabilit y. The term "switchbox" is used to refer to a switch instrument made up of one or more switch modules.

Programmin g the HP E1442A can be done th rough th e command m odul e using the Standa rd Commands for Programmable Instrum ents (SC PI - see Chapter 3), or via direct register access (register-based programming - se e Appendix B).

Chapter 1 HP E1442A Module Setup 11

Graphical Overview

Figure 1-1 is a simplified schematic illu strating the 64- chan nel Form C switch module with internal bu s and all available t erminal m odul es .

Figure 1-1. Form C Switch Simpl ified Schemati c

HP E1442A Terminal

Module Summary

12 HP E1442A Module Setup Chapter 1

• Standard Solder-Lug Terminals

• Option 010: Signal Condition ing C ircuitry/Solder Eyes

• Option 020: Screw Terminal Form A Confi guration Terminals

(NOTE: Option 020 has no connection to the NC relay contact.)

Module Use and Address Selection

You can use the switch module as a switchbox in two ways:

• As one module in a group of switch modules called a switchbox.

The first module must be addressed so it can be recognized as an instrument and the other modules in the group have addresses

sequentially following the first module e.g., 120, 121, 122 ....

• As a single-switchbox switch mod ule. The module must be

addressed so it can be recognized as an instrument.

NOTE Addressing channels on a switch module depends on how you use the

module. Figure 1-2 on card numbers (module num bers) and channel addresses describes how your choice of using the module determines ho w you access a particular channel on the switch card (modu le).

MultipleModule Switchbox

Multipleand Single-Module Switchboxes

The channel address ( has the form (@ccnn) where:

cc = card number nn = channel number.

Channel 45 on card number 02 is addressed by (@245).

This mainframe has two switchboxes: a) one multiple-module switchbox at address 120, and b) one single-module switchbox at address 48.

Single-module channel addressing:

channel_list)

A single-module switchbox has channel addresses of the form (@1nn). It is card number 1.

Figure 1-2. Logical Address, Card (Mod ule) Numb er and Chan nel Ad dress

Chapter 1 HP E1442A Module Setup 13

Setting the Module Address Switch

The logical address switch (LADDR) factory setting is 120. Valid addresses are from 1 to 254. The Form C switch module can be configured as a single instrument, or as a switchbox. Refer to the C-Size VXIbus Systems Configura tion Guide for addressing information. Refer to Figure 1-3 for switch position in fo rmation .

Note When usin g an HP E1405A/B or E140 6A, the address switch value must be

a multiple of 8 if th e m odule is the first module in a swi tchbox used with a VXIbus command mo dule usi ng SCPI comm ands.

Figure 1-3. Setting the Logi cal Address

14 HP E1442A Module Setup Chapter 1

Setting Interrupt Priority

Interrupts are enabled at power-up, after a SYSRESET, or after resetting the module via the control register. An interrupt is generated after any channel enable register is accessed when interrupts are enabled. The interrupt is generated approximately 13 ms after one of the registers is accessed. The interrupt priority jumper selects which priority level will be asserted. The interrupt priority jumper is set in positi on 1 as shipped from the factory. For most applications th is priority level shou ld not have to be changed. The interrupts are disabled when set to level X. The interrupt priority jumpers are identified on the sheet metal shield. A hole has been cut into it for access. Interrupts can also be disabled using th e Control Regist er.

To change the setting, simply remove the jumper or jumpers from their current position and place on the level you desi re. If the card uses two 2-pin jumpers, both ju mpers mu st be placed in the same row for proper operation.

Note Con sult your mainframe manual to make sure backplane jumpers are

configured correctly. If you are using the HP E1401A/B Mainframe, these jumpers are automatically set when the card is installed.

Connecting User Inputs

The Form C switch consists of a component module and a terminal module. The user connects inputs to the Form C switch NO (Normally Open), NC (Norm ally Closed), and C (Common) terminal connections on one of the three available terminal modules. Figure 1-1 earlier in this chapter shows the switch module and the thr ee term ina l mo du les . F igu re 1 -5 b elo w sh ow s t he m odul e f ron t p anel and the module’s connector pin-out which mate to the terminal module.

Figure 1-5. 64-Ch ann el Form C Switch Fro n t Panel

16 HP E1442A Module Setup Chapter 1

Standard Form C Configuration

HP E1442A Standard Terminal Module Form C Configuration with Solder Lugs

Chapter 1 HP E1442A Module Setup 17

Option 010 Form C Configuration

HP E1442A Option 010 Terminal Module Form C Configuration with Signal Conditioning Circuitry

18 HP E1442A Module Setup Chapter 1

Option 020 Form A Configuration

HP E1442A Option 020 Terminal Module Form A Configuration with Screw Terminals

Chapter 1 HP E1442A Module Setup 19

Terminal Module Type

Standard

Solder-lug

RELAY OPEN LOAD 1 LOAD 1 NO CONNECTION

RELAY CLOSED LOAD 2 LOAD 2 LOAD 2

Option 010

Signal Conditioning

Option 020

Form A

Screw Termin al

Figure 1-6. Terminal Mod ule Diff erences

20 HP E1442A Module Setup Chapter 1

Usi ng the Internal

Buses

The HP E1442A 64-Channel Form C Switch Module con tains in ternal buses that you can connect any channel co ntact to. Figure 1-7 below shows channels 0 and 63 and the internal bus structure. There is a bus for the common, the normally closed (NC), and the normally open (NO) contacts. Other jumpers provide the means to connect the NC and NO contacts to a fused +5V pull-up voltage, or to be connected as pull-downs to ground. The common can be connected to ground. Figure 1-8 shows where you can find the component/jum pe r locations on the modu le.

Figure 1-7. HP E1442A Internal Bus Struct ure

Chapter 1 HP E1442A Module Setup 21

NOTE: For clarity, not all channel relays are shown.

"Relay Connecti on " and "Bus Conn ectio n" nod es are identified on the previous diagram.

Figure 1-8. HP E1442A Intern al Bus Co mpo nen t/Ju mp er Lo cati ons

! WARNINGS and CAU TIONS

WARNING SHOCK HAZARD. Only qualified, service-trained personnel

aware of the hazards involved should install, configure, or remove the module. Disconnec t all power sources from the mainframe, the terminal module and installed modules before installing or removing a module.

22 HP E1442A Module Setup Chapter 1

WARNING SHOCK HAZARD. When handling user wiring connected to the

terminal module, consider the highest voltage present accessible on any terminal.

WARNING SHOCK HAZARD. Use wire with an insulation rating greater

than the highest voltage which will be present on the terminal module. Do not touch any circuit eleme n t connected to the terminal module if any other connector to the terminal module is energized to more than 30 VAC RMS or 60 VDC.

CAUTION MAXIMUM VOLTAGE/CURRENT. Maximum allowable volta ge

per channel terminal -to-termina l or terminal -to-cha ssis for the switch module is 150 Vdc or 150 Vac RMS (210 Vac peak). Maximum curre n t per channel is 1 Adc or 1 Aac RMS (non-inductive). Maximum transient voltage is 1300V peak. Maximum power input is 40 Wdc or 40 VA per channel, 320 Wdc or 320 VA per module. Exceeding any limit or use outside the parameters specified in Appendix A and by these warnings and cautions may damage the switch module and impair the protection provided by the module.

CAUTION WIRING TERMINAL MODULE: When wiring to the terminal

connectors on the E1442A terminal module, be sure not to exceed a 5mm strip back of insulation to prevent the possibility of shorting to other wiring on adjacent termi nals .

CAUTION STATIC-SENSITIVE DEVICE. Use anti-static procedures when

removing, con figuring, cleani ng and installing a module . The switch module is susceptible to static discharges; do not install the module without its metal shield attache d.

CAUTION CLEANING the Front Panel: Disconnect power from the

mainframe and remove the module to be cleaned. Clean the front panel with a soft cloth dampened either in clean water or in water containing a mild detergent. Do not use abrasive cleaners. Do not use an excess ively wet clo th or allow excessive water to migrate inside the module. Let the panel dry thoroughly before reinstalling the module.

Chapter 1 HP E1442A Module Setup 23

Installing the Switch Module in a Mainframe

The HP E1442A 64-Channel Form C Switch Modu le may be installed in any slot (except slot 0) in a C-size mainframe. Refer to Figure 1-9 to install the module in a mainframe.

NOTE: The ex tract ion leve rs will not seat the backplane connectors on older VXIbus mainframes. You must manually seat the connectors by pushing in the module until the front panel is flus h with the front of the mainf ra me . The extract io n levers ma y b e used to guide or remove the switch module.

Figure 1-9. Installing the Switch Modu le in a Mainframe

24 HP E1442A Module Setup Chapter 1

Wiring the Terminal Module

Figures 1-10 a nd 1- 11 show t he ru diment s of th e term inal m odu le asse mbly. M aximum terminal wire size is No. 16 AWG. Wire ends should be stripped 5mm (0.2 in.) and tinned. When wiring all channels, use a smaller gauge wire (No. 20-22 AWG).

NOTE: Solder eyes will accept a dual 96-pin DIN-C

Figure 1-10. Wiring the Terminal Module (continued on next page)

Chapter 1 HP E1442A Module Setup 25

Figure 1-11. Wiring the Termin al Module (con tinu ed from previous page)

26 HP E1442A Module Setup Chapter 1

Attaching the Terminal Module to the Switch Module

Figure 1-12. Attachi ng the Terminal Modu le to the Switch Modu le

Chapter 1 HP E1442A Module Setup 27

Initial Operation

The following program uses Hewlett-Packard BASIC and SCPI (Standard Commands for Programmable Instruments) language to get you started using the Form C switch. The example assumes a n HP 9000 Se ries 200/300 (or equivalent) computer and a Hewlett-Packard Interface Bus ( HP-IB). (HP-IB is the Hewlett-Packard implementation of the IEEE 488.2-1987 standard.)

The Normally Open (NO) contact of each Form C relay is "open" and the Normally Closed (NC) conta ct of each Form C relay is "closed" when the switch is deactivated (the Common terminal (C) is connected to NC at power-on, after reset or after an open command).

This program closes channel 02 of a Form C switch at logical address 12 0 (secondary address = 120/8 = 15) and queries the channel closure state. The result is returned to the computer and displayed ( 1 = channel closed, 0 = channel open). See the C-Size VXI bus Systems Configura tion Guide for information on addressing.

Example: Close Form C Switch Channel

10 OUTPUT 70915;"CLOS (@102)" ! Close channe l 02 . 20 OUTPUT 70915;"CLOS? (@102)" ! Query channel 02 state. 30 ENTER 70915;Value ! Enter result into V alu e. 40 PRINT Value ! Display result. 50 END

Programmin g the

Switch

Note This discussion applies only to SCPI programming using the HP switchbox

Specifying SCPI

Commands

To program the Form C switch using SCPI, you must select the compu t er language, interface address, and SCPI commands to be used. Guideli nes to select SCPI commands for the Form C switch follow. See the C-Size VXIbus Systems Configur atio n Guide for interface addressing and computer language information.

driver version provided with this module. See Appendix B, "Form C Switch Register Programming & Definitions", for information on Form C switch registers.

To address specific channels within a Form C switch, you m ust sp ecify the SCPI command and switch channel address. For the Form C switch, use

CLOSe <channel_list> to connect th e normally op en (NO) terminal to the

common (C) terminal for the channels specified. Use use

OPEN <channel_list> to conne ct the normally closed (NC) terminal to th e

common (C) terminal for the channels specified. Use to close the set of channels specified, one channel at a time.

SCAN <channel_list>

28 HP E1442A Module Setup Chapter 1

Channel Addresses Channel add resses (cha nnel_l ist) have the form (@ccnn) where cc = switch

card number (01-99) and

nn = channel numbers (00-63).

You can address single channels

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

channels

(@ccnn:ccnn,cc nn:cc nn); or any combination.

(@ccnn); multiple channels

Card Numbers The switch card number depends on the switchbox configu ration (single

module or multipl e modul e) set for the switches. (Leading zeroes can be ignored for the card number. ) For a single-module switchb ox, the card number is always 01.

For a multiple-module switchbox, the card numbers are 01, 02,...,nn. The module with the lowest logical address is c ard number 01, the module with the next lowest logical address is card number 02, etc. (See the C-Size VXIbus Systems Configuration Guide for a definition of logical addresses.)

Figure 1-13. Multiple- Mo dule Swi tchb ox Card Numb er s

Assume that three Form C switches are c onfigured to f orm a switchbox instrument with logical addresses of 120, 121, and 122. Since card number 01 is assigned to the module with the lowest logical address, card number 01 is assigned to the card at logical address 120. Card number 02 is assigned to the card at address 121 and card number 03 is a ssigned to the c ard a t address 122.

Chapter 1 HP E1442A Module Setup 29

Channel Numbe rs,

Channel Lists,

Channel Ranges

Form C switch channel numbers are 00 through 63. The channels can b e addressed using channel numbers or channel ranges. For a single-modul e switchbox, channel ranges can sp an across the channels. For multiplemodule switchboxes, channel ranges can sp an across the channels of all modules.

Use commas (,) to form a channel list or use a colon (:) to form a channel range. Only valid channels can be accessed in a channel list or channel range. Also, the channel list or channel rang e must be f rom a lower channel number to a higher channel number. For example, acceptable, but

CLOS (@215:100) generates an error.

CLOS (@100:215) is

Example: Form C Switch Channel Lists/Rang es

Channel Lists :

CLOS (@100,112) ! Close cha nnels 00 and 12 on card

01.

OPEN (@203,210) ! Open channels 03 and 10 on card

02.

Channel Ranges:

OPEN (@100:163) ! Open all channels on card 01. SCAN (@100:163) ! Scan all channels on card 01 . SCAN (@100:199) ! Scan all channels on card 01 .

30 HP E1442A Module Setup Chapter 1

Chapter 2

HP E1442A Switchbox Application Examples

Using This Chapter

This chapter provides application informati on and exampl es for using the HP E1442A 64-Channel Form C Switch Mod ule in a "switch box" . The switchbox can consis t of a single-switch modul e or multip le -switch modules. It can also include other HP switch modu les which are controlled by the same "SWITCH" device driv er.

This chapter contains:

• How to Scan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

• Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32

• Using Scanning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . Page 33

• Scanning with External Instrument s . . . . . . . . . . . . . . . . . . . Page 33

• Using the Scan Complete Bit. . . . . . . . . . . . . . . . . . . . . . . . . Page 36

• Saving and Recalling States. . . . . . . . . . . . . . . . . . . . . . . . . . Page 38

• Detecting Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . Page 38

• Synchronizing the Form C Switch. . . . . . . . . . . . . . . . . . . . . Page 40

Figure 2-1. Switchbox Configuration

Chapter 2 HP E1442A Switchbox Application Examples 31

How to Scan

Reset Conditions

Scanning Form C switch channels consis ts of closin g a set of channels (connecting NO to C) one channel at a time. Single scan, multiple

ARM:COUNt 2 to 32767) scans, or continuous (INI T:CO NT ) scanning

( modes are available. See the command reference in Chapter 3 for more information on these commands.

A number of SCPI commands relate to scanning; mos t of them are optional.

• ARM:COUNt sets the number of scanning cycles per INIT (optional).

• TRIGger:SOURce sets the trigger source for scan advance (optional).

• OUTPut:STA Te enables/ disables Trig Out signal (op tional).

• OUTPut[:EXTernal][:STAT e] ON selects Trig Out port (optional).

• INIT:CONTinuous ON selects continuous scanni ng (opti onal).

• SCAN defines channels to be scanned (required).

• INIT begins scanning (required).

• TRIG advances to next channel in scan list (required if using HOLD

or BUS trigger sources).

At power-on or following the reset of the module (*RST command), all 64 channels are open (common connected to the normally closed terminal). In addition, after a

*RST command the current scan ch annel list is invalidated.

Table 2-1 lists the parameters and default values following power-on or reset.

Table 2-1. Power-on and Reset Default Values .

Parameter Default Description

ARM:COUNt 1 Number of scanning cycles is one.

TRIGger:SOURce IMM Will advance scanning cycles

INITiate:CO NTinuou s OFF Number of scanning cycles is set by

OUTPut:[:STATe] OFF Trigger output from EXT, TTL or ECL

Channel state All 64 channels are open (channels 00 - 63).

Channel list from SCAN

command (after *RST)

Current channel list is invalidat ed following a reset of

the module with the *RST command.

automatically.

ARM:COUNt.

sources is disabled.

32 HP E1442A Switchbox Application Examples Chapter 2

Using Scanning Trigger Sources

The TRIG:SOUR command specifies the sou rce to advance the scan. You can use the

TRIG:SOUR HO L D is set. The OUTPut command can be used to enable the

HP E1405A/B or E1406A Trig Out port. See the examples that follo w.

TRIG command to advance the scan when TRIG:SOUR BUS or

Scanning with External Instruments

Scanning Form C switch channels has the same effect as executing multiple

CLOSe commands. Thus, scanning is useful when the output s from a

number of devices under test (DUT) are to be measured with an instrument. Two examples using HP BAS IC programming language follow.

Example: Scanning

with External Device

This example uses the command mo dule’s Trig Out po rt to synchroni ze the Form C switch channel closures to an external measurement device. See the following figure for typical user connections. For measurement synchronization, the HP E1405A/B or E1406A T rig Out port is conn ected to the instrument External Trigger In port. For this example, the mainframe and instrument are connected via HP-IB with m ainf rame at address 709 and the measurement instrument at address 722. The Form C switch is at logical address 120 (secondary address 15 and therefore address through the mainframe at address 70915). The measurements are transferred directly to the computer. (Appropriate instrum ent comman ds must be added to line 10 and you may need to add a WAIT statement as line 65 for long measurements.) The sequence of operation is:

INIT (line 50) closes chann el 100.

2. Closure causes trigg e r output from the Trig Out port.

3. Trigger to Ext Trig In initiates channel 100 m easu rem en t.

4. Result is sent to the computer (lines 60-80).

TRIGGE R (line 90) advances the scan to channel 101.

6. Steps 2-5 are repeated for channels 101-102.

10 OUTPUT 722;"TRIG EXT;...." ! Configure inst rume nt.

20 OUTPUT 70915;"OUTP ON" ! Enable Trig Out port. 30 OUTPUT 70915;"TRIG:SOUR BUS" ! HP-IB bus triggeri ng. 40 OUTPUT 70915;"SCAN (@100:102)" ! Scan channels 00- 02. 50 OUTPUT 70915;"INIT" ! Enable scan . 60 FOR I=1 TO 3 ! Start coun t loop. 70 ENTER 722;A ! Enter re adi ng. 80 PRINT A ! Display reading. 90 TRIGGER 70915 ! Advance scan. 100 NEXT I ! Increment coun t. 110 END

Chapter 2 HP E1442A Switchbox Application Examples 33

Figure 2-2. Scanning with an External Devic e

34 HP E1442A Switchbox Application Examples Chapter 2

Example: Scanning

Using Trig Ou t and

Trig In Ports

This example uses the command m odule’s Trig Out and Trig In ports to synchronize Form C switch channel closures with an exte rnal measurem ent device. See the following figure for typical use r connections. For this example, the mainframe and measurem ent instrument a re c onnected via HP-IB with mainframe at address 709 and the me asurement instrument at address 722. The Form C switch logical address is 120 ( secondary address = 120/8= 15 and therefore addressed through the mainframe at 70915).

With this example, sinc e synchronizatio n with the computer cann ot be ensured, the external instrument must have internal mem ory capacity to store the readings. Also , you must add the appropriate inst ru ment commands to line 10. The sequence of operation is:

INIT (line 50) closes chann el 100.

2. Closure causes trigg e r to be ou tput from Trig Out port.

3. Trigger to Ext Trig In initiates channel 100 m easu rem en t.

4. Channel 100 measurement result stored in instrument.

5. Trigger is then output from Measu rem ent Com plete port.

6. Trigger to Event In port advances scan to channel 101.

7. Steps 2-6 are automatically repeated for channels 101-102.

10 OUTPUT 722;"TRIG EXT; .... " ! Configure volt met er.

20 OUTPUT 70915;"OUTP ON" ! Enable Trig Out port. 30 OUTPUT 70915;"TRIG:SOUR EXT" ! E ve nt In trigge ring. 40 OUTPUT 70915;"SCAN (@l00:102)" ! Sc an c ha n ne ls 00 - 02. 50 OUTPUT 70915;"INIT" ! Enable scan . 60 FOR Chan = 1 to 3 70 PRINT "Channel", Chan, Result 80 NEXT Chan 90 OUTPUT 70915;"*RST"

100 END

! Resets modul e; opens last switch closed.

Chapter 2 HP E1442A Switchbox Application Examples 35

Figure 2-3. Scanning Using Trig Out and Trig In

Using the Scan Complete Bit

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

STATe:OPERational[ :EVENt]? command in the Command Reference for an

example.

STAT:OPER? command. See the

When enabled by the bit will be reported as bit 7 of the Status Register. Use the HP-IB Serial Poll or the IEEE 488.2 Commo n comm an d

When bit 7 of the Status Register is enabled by the command to assert an HP-IB Service Request (SRQ), you can interrupt the computer when the Scan Complete bit is set after a scanning cycle completes. This allows the computer to do othe r operations while the scanning cycle is in progress.

STAT:OPER:E NAB 2 5 6 command, the Scan Comp lete

*STB? to read the Status Register.

*SRE 128 Comm o n

36 HP E1442A Switchbox Application Examples Chapter 2

The following example monit ors bit 7 in the Status Regist er to determine when the scanning cycle completes. The computer used in this example is an HP 9000 Series 200/300 used with HP BASIC as the programm ing language. The compu t e r interfaces with an HP E1400A/E1401A Mainframe or an HP E1405/E1406 Command Module ov er HP-IB. The HP-IB select code is 7, the HP-IB primary address is 09, and the HP-IB secondary address is 15.

Example: Scan Complete Interrupt

10 OUTPUT 70915;"*CLS" ! Clear all switchbox status

structure.

20 OUTPUT 70915;"STAT:OPER:ENAB 256" ! Enable Sc an Co mplete Bit to

30 OUTPUT 70915;"*SRE 128" ! Enable bit 7 of Status Register to

40 OUTPUT 70915;"TRIG:SOUR EXT" ! Set to external trigg er mode. 50 OUTPUT 70915;"SCAN (@100:147)" ! Select channels to be scann ed . 60 OUTPUT 70915;"INIT" ! Start scann ing cyc le. 70 WHILE NOT BIT(SPOLL(70915),7) ! Waiting for scan compl ete . 80 PRINT "DO OTHER OPERATION HERE"! Enter program lines for

90 END WHILE 100 PRINT "INTERRUPT GENERATED" ! Program goes to this line after

set bit 7 in Stat us R eg ist er.

assert SRQ.

computer to do othe r ope rat ion s.

interrupt is generat ed by a complete d scanni ng cyc le.

Chapter 2 HP E1442A Switchbox Application Examples 37

Saving and Recalling States

This section contains information about saving and r e calling a switch module state. The switchbox driver can store up to 10 states.

Saving States The *SAV <numeric_state> command saves the current instrument state.

The state number (0-9) is specified in the state parameter. The following settings are saved:

• Channel Relay State (channels 00 through 63 open or closed)

• ARM:COUNt

• TRIGger:SOURce

• OUTPut[: STATe]

• INITiate:CONT inuous

Recalling States The *RCL <numeric_state> comm and recalls a previously saved st at e.

Enter the number (0-9) in the state parameter of the desired saved state. If

*SAV was not previously executed using the selected number, the switch

module will configure to the reset values (see Table 2-1).

NOTE Scan lists are not saved when a state is saved. You must re-enter your scan

list after recalling a state.

Detecting Error Conditions

There are two general approaches to error checking. The simplest, but most time consuming, is to ask the instrument whether there are errors at every step of the switching process. This is called "poll ing" and is illustrated in the example shown below.

10 DIM Err$[256] 20 OUTPUT 70915;"CLOS (@101)" ! Close cha nne l 1 switch. 30 OUTPUT 70915;"SYST:ERR?" ! Query for error. 40 ENTER 70915;Err$ ! Read response. 50 IF VAL (Err$) > 0 THEN ! If an error is found (Err$ not 0). 60 PRINT "Error";Err$ ! Print the error. 70 STOP ! Quit if error encountered. 80 END IF 90 ... (PROGRAM CONTINUES )

38 HP E1442A Switchbox Application Examples Chapter 2

Using Interrupts with

Error Checking

The second approach involves the use of interrupts. The following program is a method of checking for errors using interrupts as you program the switc h module. The program monitors the switch’s Standard Event Status Register for an error condition. If no errors occur, the switc h module f unctions as programmed. If errors do occur, the switch module interrupts the computer, and the error codes and messages are read from the error queue.

This HP BASIC programming example has a single switch modul e at address 70915.

10 20 30 40 ON INTR 7 CALL Errmsg 50 ENABLE INTR7:2 60 70 80 90 100 OUTPUT 70915;"*SRE 32" 110 OUTPUT 70915;"*ESE 60" ! Enables all parser generated errors. 115 ! See 120 130 140

. . . 190 END

200 ! 210 220 230 240 250 SUB Errmsg 260 DIM A$[256] 270 CLEAR 70915 ! Clear the switc h module . 280 B = SPOLL(70915) ! Fetch status byte. 290 REPEAT ! Rep eat. 300 OUTPUT 70915;"SYST:ERR?"! Query for error. 310 ENTER 70915;Code,A$ ! Read re sponse. 320 PRINT Code,A$ ! Print error. 330 UNTIL Code=0 ! Keep querying for an er ror unt i l

340 OUTPUT 70915;"*CLS" ! Clears status registers and error queue. 350 STOP 360 SUBEND

! Call to print out error message.

! Enables the standard event summary bit SRE.

STATus

command figure.

! Define in te rr upt servi ce rout i ne. ! Declare resp o nse string.

error co de = 0.

Chapter 2 HP E1442A Switchbox Application Examples 39

Synchronizing the Form C Switch

This section discusses syn chro nizing the switch to other instrum ents when making measurements. The following example uses the switch m odul e to switch a signal to be measured by a multimeter. The program verifies that the switching is complete before the multimeter begins a measurement.

Measurement Set-Up

• Digital Multimeter has an HP-IB select code = 7, primary

address = 09 and secondary address = 03 (it is addressed as 70903).

• HP E1442A has an HP-IB select code = 7, primary address = 09 and

secondary address = 15 (it is addressed as 70915).

• Controller is an HP Series 200/300/400 comput er with HP BASIC.

10 OUTPUT 70915;"CLOS (@100)" ! Close channe l 10 0. 20 OUTPUT 70915;"*OPC?" ! Wait for completio n of close

30 ENTER 70915;Opc_value ! Read response to

31 ! 32 ! Channel is closed and measurement can be made. 33 ! 40 OUTPUT 70903;"MEAS:VOLT:DC?" ! Make VM measureme nt. 50 ENTER 70903;Meas_value ! Read the measurement. 60 PRINT Meas_value ! Print the measurement. 70 END

command.

*OPC?

command.

40 HP E1442A Switchbox Application Examples Chapter 2

Chapter 3

HP E1442A Switchbox Command Reference

Using This Chapter

This chapter describes Standard Commands for Program mable Instrum ents (SCPI) and summarizes IEEE 488. 2 Comm on (*) co mm ands appli cabl e to the HP E1442A 64-Channel Form C Switch Mod ule. This chapter contains the following sections:

• Command Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 41

• SCPI Command Reference . . . . . . . . . . . . . . . . . . . . . . . . . . Page 44

• SCPI Command Quick Reference . . . . . . . . . . . . . . . . . . . . . Page 71

• IEEE 488.2 Common Command Reference . . . . . . . . . . . . . Page 72

Command Types

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

Common

Command Format

SCPI Command

Format

The IEEE 488.2 standard defines the Common commands th at perform functions like reset, self-test, status byte query, etc. Common comm ands are four or five characters in length, always begin with the asterisk character

*), and may include one or more parameters. The command keyword is

( separated from the first parameter by a space character. Some examples of Common commands a r e shown below:

*RST *ESR 32 *STB?

The SCPI commands perform functions like closing switches, mak ing measurements, and querying instrum en t states or retrieving data. A subsystem comman d 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 SCAN <channel_list>

[ROUTe:

commands with param eters, and

<channel_list>

:MODE?

]is the root command, CLOSe and SCAN are second-level

:MODE? is a third-level command.

Chapter 3 HP E1442A Switchbox Command Reference 41

Command Separator A colon (:) alw ays separates one command from the next lower-level

command as shown below:

[ROUTe:] SCAN:MODE?

Colons separate the root command from the second-level command

[ROUTe:]SCAN) and the seco nd level from the thi rd level (SCAN:MODE ? ).

(

Abbreviated

Comma nd s

The command syntax shows most com mands as a mixture of upper- and lowercase letters. The uppercase letters indicate the abbreviated sp elling for the command. For shorter program lines, send the abbreviated form. For better program readability, you may send the entire comm and. The instrument will accept either the abbreviated form or the entire command.

For example, if the command syntax shows

MEASURE are both acceptable forms. Other forms of MEASure, such as MEASU or MEASU R will generate an error. You may use upp er- or

lowercase letters. Therefore,

MEASURE, measure, and MeAsUrE are all

MEASure, then MEAS and

acceptable.

Implied Commands Implied comman ds 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 th e inst rum ent.) Suppose you send a second-level

command but do not send the preceding implied co mman d. In this case, the instrument assumes yo u intend to use the implied comm and and it respon ds as if you had sent it.

Examine the

[ROUTe:]

CLOSe CLOSe? <channel_list> OPEN <channel_list> OPEN? <channel_list> SCAN <channel_list>

[ROUTe:] subsystem shown below:

<channel_list>

:MODE NONE|VOLT :MODE?

The root command [ROUT e:] is an implied command (indi cated by square brackets

[ ]). To close relays in a channel list, you can send either of the

following command st atem ents:

[ROUTe:]CLOSe (@100:107, 201, 225) or CLOSe (@100:107, 201, 225)

These commands function the same closin g channels 00 th ro ugh 07 on card 1 and channels 01 and 25 on card 2.

42 HP E1442A Switchbox Command Reference Chapter 3

Parameters Parameter Types. The following table contains explanations and exam ples

of parameter types you might see later in this chapter.

Parameter Type Explanations and Examples

Numeric

Boolea n

Discrete

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 INF.

Represents a single binary condition that is either true or false.

ON, OFF, 1, 0. Selects from a finite number of values. These

parameters use mnemonics to represent each valid setting.

An example is the TRIGger:SOURce

<source > can be BUS, EXT, HOLD, or IMM.

where

<source> command

Optional Parameters. Parameters shown within squ a re 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 instrum ent chooses a de fault value. For example, consider the command without sp ecifying a parameter, the present is returned. If you send the minimum count available. If you send the

ARM:COUNt? [MIN |MAX] comman d. If you send the

ARM:COUNt settin g

MIN parameter, the command returns 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 Command s. Use

a semicolon (

*RST;OUTP ON or TRIG:SOUR HOLD;*TRG

Linking Multiple SCPI Commands. Use both a semicolon (;)and a colon (

ARM :COUN 1;:TRIG :S OUR EXT

;)between the commands. For example:

:) between the commands. For example:

Chapter 3 HP E1442A Switchbox Command Reference 43

SCPI Command Reference

This section describes the Standard Commands for Programmable Instruments (SCPI) comm an ds for the HP E1442A 64-Channel Form C Switch Module. Commands a re listed alphabeti cally by sub syst em and within each subsys tem.

There are two methods to send commands to the instrument. The method most often used is from a controller over the HP-IB interface; this method will be referred to as the "HP-IB interface" in the following com mand reference. The second method of sending commands is from a terminal connected to the HP E1405/1406 Command M odul e (RS-232). Commands sent this way will be referred to as "from the terminal" in the following command reference.

ABORt

The ABORt command stops a sc an in progress when the trigger sources are

TRIGger:SOURc e BUS or TRIGger:SOURce HOLD. See the

either comments below for how to get out of a scan if trigger source is not

HOLD.

BUS or

Subsystem Syntax ABORt

Comments • Channel Status Af ter an ABO Rt: ABORting a scan will leave the

• Effect on Scan Complete Status Bit: ABORting a scan will not set

• Stopping Scans Enab led f ro m HP-IB Int erface: When a scan is

NOTE Clearing the HP-IB interface during a scan leaves the last channel the scan

closed in the closed position and do es not set the "scan complete" st at us bit .

last channel that it closed in the closed position.

the "scan complete" status bit .

enabled from the HP-IB interface, and the trigger source is not

HOLD or BUS, you can clear the interface to stop the scan (in the

BASIC programming language, this is done by executing the command for your interface, e.g. CLEAR 7).

When the scan is enabled from the HP-IB interface and the trigger source is the

TRIGger:SOURce BUS or TRIGger:SOURce HOL D, send

ABORt command ov er the HP-IB bus.

CLEAR

44 HP E1442A Switchbox Command Reference Chapter 3

• Stopping Scans by Using the RS-232 Termin al: You may us e a

terminal connected to the HP E1405/14 06 Comm an d Module to sto p any scan.

If the scan was started from the terminal, and the trigger source is

HOLD or BUS, send the ABORt command to halt the scan. If the

scan was started from the terminal and some other trigger source is being used, a "Ctrlinstrument and abort the scan. Sending "Ctrl-

c" will send an interface CLEAR to the

r" also sends an

interface CLEAR to the instrument and additionally performs a reset

*RST) on the instrument. (See the Command Reference in the

( command module’s user’s manual for details on the terminal interface.)

If the scan was started from the HP-IB interface but you wish to stop it by using the terminal, first make sure that the correct instrument (e.g.,SWITCH at desired logical add ress) is selected by using the terminal soft keys. Then send a "Ctrl-

r". This will send an interface

CLEAR to the HP-IB task, but will not place the instrument in the reset state with respect to the HP-IB task. These actions will occur regardless of the trigger source setting.

NOTE Clearing the interface using a "Ctrl-c" from the terminal during a scan

leaves the last channel it closed in the closed posi tion and does not set the Scan Complete status bit.

• Related Commands: ARM, INITiate:CO NT inuous, [ROUTe: ]SCA N,

TRIGge r

Example Stopping a Scan with ABORt

TRIG:SOUR BUS ! Bus is trigger source. INIT:CONT ON ! Sets contin uous sc ann ing . SCAN (@100:115) ! Sets channel list. INIT ! Starts scanning cyc le. . . ABOR ! Aborts scan in progress.

Chapter 3 HP E1442A Switchbox Command Reference 45

ARM

Subsystem Syntax ARM

The ARM subsystem allows a scan list to be scanned multiple tim es (1 through 32767) with one

:COUNt :COUNt? [MIN | MAX]

<number> MIN | MAX

INITiate command.

:COUNt ARM:COUNt <number> allows scanning cycles to occur a multiple of

times (1 to 32767) with one

INITiate:CONTinuous O FF |0 is set.

Parameters

Parameter Name Parameter Type Range of Values

number

Comme nt s • Number of Scans: Use only values between 1 (MIN ) to 32767

MAX) for the number of scanning cycles (default is MIN = 1).

(

INITiate command and when

numeric 1 thru 32767 | MIN | MAX

• Related Commands: ABORt, INITiat e:IMM ediate,

INITiate:CONTinuous

• *RST Condition: ARM:COUNt 1

Example Setting Ten Scanning Cycles

ARM:COUN 10 ! Sets 10 scanning cycles. SCAN (@100:115) ! Sets channel list. INIT ! Starts scanning cyc le.

46 HP E1442A Switchbox Command Reference Chapter 3

DISPlay

:COUNt? ARM:COUNt? [MIN | MAX] returns the current number of scanning cycles

ARM:COUNt. If a value between MIN and MAX is set, that value for

set by

ARM:COUNt is returned. The optional parameters MIN and MAX allow you

to query the module for the these values instead of lookin g them up in the command reference. A 1 is returned for the returned for the

MAX parameter regardless of the ARM:COUNt value set.

Parameters

Parameter Name Parameter Type Range of Values

MIN | MAX numeric [MIN = 1 | MAX = 32767]

Comme nts • Related Commands: INITiate:IMMediate

Example Query Number of Scanning Cycles

ARM:COUN 55 ! Set 10 scanning cycles. ARM :COUN? ! Query number of scann ing

MIN parameter; 32767 is

cycles; returne d valu e is 55.

The DISPlay subsystem monitors the channel state of a selected module ( or card) in a switchbox. The an RS-232 terminal connected to the HP E1405/1406 Co mman d Mod ule’s RS-232 port. These commands control the display on the terminal, and would in most cases be typed directly from the terminal keyboard. It is possible, however, to send these commands ov er the HP-IB in terface and control the terminal’s display. In this case, care must be taken that the instrument receiving the selected on the terminal, otherwise the HP- IB comm an d will have no visibl e effect.

Subsystem Syntax DISPlay

:MONitor

:CARD :CARD? [:STATe] [:STATe]?

<number>|AUTO

DISPlay command subsys tem onl y operates with

DISPlay command is the same one that is currently

<mode>

Chapter 3 HP E1442A Switchbox Command Reference 47

:MONitor:CARD DISPlay:MONitor:CARD <number>|AUTO selects the module in a

switchbox to be monito red .

NOTE You must use DISP:MO N:STAT ON to actually display the mon itored

module state to the RS-232 terminal.

Parameters

Parameter Name Parameter Type Range of Values

|AUTO numeric 1 thru 99

Comments • Selecting a Specific Module to be Monitored: Send the card

number in a switchbox with the

DISPlay:MONitor :CARD com mand.

• Selecting the Present Module to be Monitored (AUTO): Use the

DISPlay:MONitor AUTO command to select the last module

addressed by a switching command (e.g.,

[ROUTe:]CLOSe).

• *RST Condition: DISPlay:MONitor:CARD AUTO

Example Select Module #2 in a Switchbox for Monitoring

DISP:MON:CARD 2 ! Se le cts m od ule #2 in a swit c hbox .

:MONitor:CARD? DISPlay:MONitor: CARD? qu eries the setting of the :MONit or:CARD

command and returns the mo dule in a switchbox to be mo nito red.

48 HP E1442A Switchbox Command Reference Chapter 3

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

When monitor mode is on, the RS-232 terminal disp lay p resen ts an array of values indicating the open/close state of every switch on the module. This display is dynamically updated e ach time a switch is opened or closed.

Parameters

Parameter Name Parameter Type Range of Values

<mode>

boolean 0 | 1 | ON | OFF

Comme nts • Monitoring Switchbox Channels: DISPlay:MONit or[: ST AT e] ON or

DISPlay:MONitor [:ST ATe] 1 turns the mo nito r mode on to show the

channel state of the selected module.

OFF

or DISPlay:MONitor[:STATe] 0 tu rns the mon itor mo de off.

DISPlay:MONitor[:STATe]

• Typing in another command on the terminal will cause the

DISPlay:MONitor [:ST ATe] to be automatically set to OFF (0).

NOTE: Use of the OFF parameter is useful only if the command is issued across the HP-IB interface.

• Selecting the Module to be Monitored: Use the

DISPlay:MONitor:CARD <number>|A U TO command to se lect the module.

• Monitor Mode on an HP E1405/1 406 Comma nd Module

Display: A typical display for the HP E1442A 64-Channel Form C Switch with all channels (i.e. all relays) closed follows. The "#H" indicates data is in hexadecimal format. Each channel is represented as a bit in the hex value.

The channels are grouped into four blo cks of 16 channels e ach.

15-0 #HFFFF 31-16 #HFFFF 47-32 #HFFFF 63-48 #HFFFF

Closing only channel 3 would appear as 15-0: #H0008.

• *RST Condition: DISPlay:MONit or[: STAT e] O FF | 0

An *RST also opens all switches on the card. A DISP:MON ON command following a *RST will display the follo wing:

15-0 #H0000 31-16 #H0000 47-32 #H0000 63-48 #H0000

Example Enabling the Monitor Mode

DISP:MON:CARD 2 ! Se le cts m od ule #2 in a swit c hbox . DISP:MO N 1 ! Turns the monitor mode on.

:MONitor[:STATe]? DISPlay:MONitor[:ST AT e]? queries the monitor mode. The command

returns a 1 if monitor mode is on or a 0 if monitor mode is off.

Chapter 3 HP E1442A Switchbox Command Reference 49

INITiate

Subsystem Syntax INITiate

:CONTinuous INITiate:CONTinuou s <mode> enables or d isa ble s cont in uous sca nni ng

Parameters

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

:CONTinuous :CONTinuous? [:IMMediate]

cycles for the switchbox. The setting of this command determines whether or not a subsequent

Parameter Name Parameter Type Range of Values

<mode>

INIT[:IMMediate] command will cause a continuous scan to occur.

<mode>

boolean 0 | 1 | ON | OFF

Comme nts • Continuous Scanning Operation: Continuous scanning is enabled

with the command. Sending the INITiate[:IMMediate] command closes th e first channel in the channel list. Each trigger from a trigger source selected by the through the channel list. A trigger at the end of the channel list closes the first channel in the list and the scan cycle repeats.

INITiate:CONTinuous ON or INITiate:CONTinuous 1

TRIGger:SOURce command advances the scan

• Non-Continuous Scan ning Ope rati on: Non-continuo us scanning is

enabled with the command. Sending the INITiate[:IMMediate] command closes th e first channel in the channel list. Each trigger from a trigger source selected by the through the channel list. A trigger at the end of the channel list opens the last channel in the list and the scanning cycle stops.

INITiate:CONTinuous OFF or INITiate:CONTinuous 0

TRIGger:SOURce command advances the scan

• The INITiate:CONTinuous command does not start a scanning cycle

INIT:IMM).

(see

• Stopping Continu ous Scans: See the ABORt command.

• Related Commands: ABORt, ARM:CO UNt, INITiate[ :IMM ediate] ,

TRIGger, TRIGger:SOURce

• *RST Condition: INITiate:CONTinuous OFF

Example Enabling Continuous Sca ns

INIT:CONT ON ! Enables continuou s scan nin g. SCAN (@100:163) ! Sets channel list. INIT ! Starts scanning cyc le.

50 HP E1442A Switchbox Command Reference Chapter 3

:CONTinuous? INITiate:CONTinuous? queries the scanni ng state. With continuous

scanning enabled, the command returns 1. With contin uous scann ing disabled, the command returns 0.

Example Query Contin uou s Scan ni ng Sta te

INIT:CONT ON ! Enable conti nuou s scan nin g. INIT:CO NT ? ! Query continuou s scan nin g stat e.

[:IMMediat e] INITiate[:IM Medi ate] starts the scanning cycle and closes the first channel

in the channel list. Successive triggers from the source specified by the

TRIGger:SOURce command advan ce the scan through the chan nel list .

Comme nt s • Starting the Scanning Cycle: The INITiat e[:IM Mediate] command

starts scanning by closing th e first channel in the channel list. A trigger advances the scan through the channel list. An invalid channel list generates an error (see

• Stopping Scanning Cycles: See the ABO Rt command.

• Related Commands: ABORt, ARM:CO UNt, INITiate: CONTinuous ,

TRIGger, TRIGger:SOURce

[ROUTe:]SCAN comm and).

• *RST Condition: None

Example Starting a Single Scan

SCAN (@100:163) ! Sets channel list. INIT ! Starts scanning cyc le by closin g

channel 00 and proceeding.

Chapter 3 HP E1442A Switchbox Command Reference 51

OUTPut

The OUTPut subsystem enables one trigger line of the HP E1405A/B or E1406A Command Modu le. It also can disable the active line.

Subsystem Syntax OUTPut

:ECLTrg

[:EXTernal]

:TTLTrg

:ECLTrgn[:STATe] OUTPut:ECLTrgn[:STATe] <mode> enables (ON or 1) or disables

(OFF or 0) the ECL trigger bus pulse on the VXI bus line specified by n. There are two ECL t rigger lines on the VXI bus a llowing valid values for n to be 0 and 1.

[:STATe] <mode> [:STATe]?

[:STATe] [:STATe]?

[:STATe] <mode> [:STATe]?

<mode>

Parameter Name Parameter Type Range of Values

<mode> boolean 0 | 1 | ON | OFF

numeric 0 or 1

Comme nts • When OUTPut:E CLTr gn[: ST ATe] ON is set, a trigger pulse occurs

each time a channel is closed during a scan.

:ECLTrgn[:STATe]? OUTPut:ECLTrgn[:STATe]? queries th e state of the ECL trigg er bus line

specified by disabled. Valid values for n are 0 and 1.

Parameter Name Parameter Type Range of Values

n. A 1 is returned if the line is enabled; a 0 is returned if it is

numeric 0 or 1

52 HP E1442A Switchbox Command Reference Chapter 3

[:EXTernal][:STATe] OUTPut[:EXTernal][:STATe] <mode> enables or disables the Trig Out

port on the HP E1405A/B or E1406A Com mand Modu le.

OUTPut[:EXTernal][:STATe] ON | 1 enables the port and OUTPut[:EXTer nal][ :STAT e] OFF | 0 disables the port.

Parameters

Parameter Name Parameter Type Range of Values

<mode> boolean

0 | 1 | ON | OFF

Comments • Abbreviated Syntax: OUTPut subsystem commands [:EXTernal]

and [:STATe] are optional subcomm ands. The OUTPut command can be abbreviated by simply executing

OUTPut OFF .

OUTPut ON or

• 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 Puls e : The pulse is a +5 V negative going pulse.

• Trig Out Port Shared by Switchboxes: Once enabled, the Trig

Out port may be pulsed by the switchbox each time a channel is closed in a switchbox during scannin g. To disable the output for a specific switchbox, send the

OUTPut[:EXTernal][:STATe] 0 comm and for that switchb ox. The OUTP OFF command must be executed following use of this port to

allow other instrumen t drivers to control the Trig Out port.

OUTPut[:EXTer nal] [: STAT e] OFF or

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

• *RST Condition: OUTP ut[:EXT erna l][:ST ATe ] OFF (port disabled)

Example Enabling Trig Out Port

OUTP ON ! Enables Trig Out port for pul se

output.

[:EXTernal][:STATe]? OUTPut:[:EXTernal][S TAT e]? queries the present state of the Trig Out port

on the HP E1405/E1406 Command M odule. The command returns 1 if the port is enabled, or 0 if disabled.

Example Query Trig Out Port State

OUTP ON ! Enable Trig Out port for pul se

output.

OUTP :STAT? ! Query port enab le stat e .

Chapter 3 HP E1442A Switchbox Command Reference 53

:TTLTrgn[:STATe] OUTPut:TTLTrgn[:STATe] <mode> enables (ON or 1) or disables (OFF or

0) the TTL trigger bus pulse on the VXI bus line specified by n. There are eight TTL trigger lines on the VXI bus (n = 0 through 7).

Parameter Name Parameter Type Range of Values

<mode> boolean 0 | 1 | ON | OFF

numeric 0 thru 7

Comme nts • When OUTPut:TTLTrgn[:STATe] ON is set, a trigger pulse oc curs

each time a channel is closed during a scan.

:TTLTrgn[:STATe]? OUTPut :TTLTrgn[:STATe]? queries th e state of the TTL trigger bus lin e

specified by n. A 1 is returned if the line is enabled; a 0 is returned if it is disabled. Valid values for n are 0 th ro ugh 7.

Parameter Name Parameter Type Range of Values

numeric 0 thru 7

54 HP E1442A Switchbox Command Reference Chapter 3

[ROUTe:]

Subsystem Syntax [ROUTe:]

The [ROUTe] subsystem cont ro ls switch ing and scanni ng operation s for the Form C switch modules in a switchbox.

CLOSe CLOSe? <channel_list> OPEN <chann el _list> OPEN? <channel_list> SCAN <channel_lis t>

<channel_list>

:MODE <mode> :MODE?

CLOSe [ROUT e:]CL OSe <channel_list> activates the Form C switch relay for the

channels specified in the channel_list. The relay’s Common (C) termin al is connected to the Normally Open (NO) terminal (see diagram below). The channel_list is in the form

cc = card number (00-99) and nn = channel number (00-63).

(@ccnn), (@ccnn,ccnn) , or (@ ccnn:ccnn) where

Parameters

Parameter Name Parameter Type Range of Values

<channel_list>

numeric cc00-cc63

Comments • Special Case of Using Upper Rang e 99 in the Channel List:

Specifying the last channel as 99 e.g. , closes all channels on the card number specified by

(@100:199) auto matically

cc.

• Closing Channels (card and chan nel syn tax; ccn n):

– [ROUTe:]CLOSe (@ccnn) to close a single channel. – [ROUTe:]CLOSe (@ccnn,ccnn) to clo se m ultiple channels. – [ROUTe:]CLOSe (@ccnn:ccnn) to close sequential channels. – [ROUTe:]CLOSe (@ccnn:ccnn, ccnn: ccnn) to clo se a group of

sequential channels.

• Closure Orde r: A list of channels will not all close simultaneously.

The order channels close when specified from a single command is not guaranteed. Use s eq uential

CLOSe commands if needed.

Chapter 3 HP E1442A Switchbox Command Reference 55

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

• *RST Condition: All Form C switch channels are open.

Example Closing Form C Switch Chan nels

This example closes channel 00 of card number 1 Form C switch module and channel 15 of card number 2 Form C switch module in a single switchbox.

CLOS (@100,215) ! 100 closes cha nne l 00 of Form C

switch #1; 215 close s c hann el 15 of Form C switch #2.

CLOSe? [ROUTe:]CLOSe? <channel_list> returns the current state of the

channel(s) queried. The channel_list is in the form command returns 1 if the channel is in the NO state (C connected to NO) or returns 0 if the channel is in the NC state (C connected to NC). If a list of channels is queried, a comma deline ated list of 0 or 1 values is returned in the same order of the channel list.

Comme nt s • Query is Software Readback: The [ROUT e:]CLOSe? command

returns the current state of the hardware controlling the specified channel. It does not account for a failed switch element or a relay closed by direct register access (see Appendix B).

Example Query Form C Switch Chan nel Clos ur e

CLOS (@100,215) ! 100 closes cha nne l 00 of Form C

switch #1; 215 close s c hann el 15 of Form C switch #2.

CLOS? (@215) ! Query channe l 215.

(@ccnn). The

56 HP E1442A Switchbox Command Reference Chapter 3

OPEN [ROUTe:]OPEN <channel_list> de-energizes the relays for the channels

specified in the channel_list connecting the Common (C) terminal to the Normally Closed (NC) terminal (see diagram below). The channel_list is in the form (00-99) and

Parameters

Parameter Name Parameter Type Range of Values

(@ccnn), (@cc nn,cc n n), or (@ccnn:ccnn) where cc = card number

nn = channel number (00- 63).

<channel_list>

numeric cc00-cc63

Comments • Using Upper Range 99 in the Channel List: Specifying the last

channel as 99 e.g., the card number specified by

(@100:199) automatically opens all channels on

cc.

• Opening Channels : To open:

– a single channel, use [ROUTe:]OPEN (@ccnn); – for multiple channels, use [ROUTe:] O PEN (@cc nn,cc n n) ; – sequential channels, use [ROUTe:]OPEN (@ccnn: ccnn) ; – a group of sequential channels,

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

use

– or any combination .

• Opening Order: A list of channels will not all open

simultaneously. The order channels open when specified from a single command is not gua ranteed. Use sequential

OPEN commands

if needed.

• Related Commands: [ROUTe:]CLOSe, [ROUT e:]OP EN?

• *RST Condition: All Form C switch channels are open.

Example Opening Form C Switch Channels

This example opens channel 00 of a card number 1 Form C switch module and channel 63 of a card number 2 Form C switch module in a single switchbox.

OPEN (@100,263) ! 100 opens ch anne l 00 of Form C

switch #1; 263 opens c han nel 63 of Form C switch #2.

Chapter 3 HP E1442A Switchbox Command Reference 57

OPEN? [ROUTe:]OPEN? <channel_list> returns the current state of the channel

queried. The channel_li st is in the form if the channel is in the NC state (C connected to NC) or returns 0 if the channel is in the NO state (C connected to NO). If a list of channels is queried, a comma delineated list of 0 or 1 values is returned in the same order of the channel list.

Comments • Query is Software Readback: The [ROUTe:]O PEN? command

returns the current state of the hardware controlling the specified channel. It does not account for a failed switch element.

Example Query Form C Switch Chan nel Open State

(@ccnn). The command returns 1

OPEN (@100,263) ! 100 opens ch anne l 00 of Form C

OPEN? (@263) ! Query cha nne l 263.

switch #1; 263 opens c han nel 63 of Form C switch #2.

58 HP E1442A Switchbox Command Reference Chapter 3

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

channel_list is in the form

cc = card number (00-99) and nn = channel number (00-63 and 99). See the

first bullet commen t for explanat ion of usi ng the special c ase of 99 in the channel list.

Parameters

Parameter Name Parameter Type Range of Values

(@ccnn), (@ ccnn,ccnn), or (@ccnn:ccnn) where

<channel_list>

numeric cc00-cc63 (or cc99)

Comme nt s • Special Case of Using Upper Range 99 in the Channel List:

Specifying the last channel as 99, e.g . scans all channels on the card number specified by

(@100:199) auto matically

cc.

• Defining the Channel Lis t: When executing [ROUTe:]SCAN, the

channel list is checked for valid card and channel numbe rs. An error is generated for an invalid channel list.

• Scanning Operation: With a valid channel list, INIT iate[ :I MM ediate]

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

TRIGger:SOURce advance the scan through the channel list.

• Stopping Scan: See the ABORt command.

• Related Commands: CLOSe, OPEN, SCAN:MODE, TRIGger,

TRIGger:SOURce

• *RST Condition: All channels open.

Example Scanning Using External Device

See Chapter 2, "Example: Scanning with Ext ernal Device" or "Example: Scanning Using Trig Out and Trig In Ports" for example sc anning programs using external instruments .

Chapter 3 HP E1442A Switchbox Command Reference 59

Example Scanning Using External Devices

The following example shows how to scan channels using the HP E1405/1406 Co mm and Mod ule via HP-IB and an HP 345 7A Digit al Multimeter. This example uses the comm an d module’s T rig Out port to synchronize the switch mo dule in a switchb ox to the multi meter. The trigger pulse from the Trig Out port triggers the multimeter for a measurement. See Chapter 2 for typical user connections to the Form C switch module.

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 E1405/E1406 Comm and Mo dule and HP 34 57A Multimeter, respe ctively, and an HP-IB secondary address of 15 for the switchbox.

10 OUTPUT 722;"TRIG EXT;DCV" ! Sets multime te r to exte rnal

20 OUTPUT 70915;"OUTP ON" ! Enables Trig Out port on

30 OUTPUT 70915;"TRIG:SOUR BUS" ! Sets switchb ox to receive bus

40 OUTPUT 70915;"SCAN:MODE VO LT"! Sets switchbox to measure

50 OUTPUT 70915;"SCAN (@100:163)"! Selec ts t he channel list. 60 OUTPUT 70915;"INIT" ! Starts scann ing cyc le. 70 FOR I=1 TO 64 ! Starts count loop. 80 ENTER 722;A ! Enters v olt m e te r re a din g into

90 PRINT A ! Prints readin g in vari abl e A. 100 TRIGGER 70915 ! Trig ge rs t he switchbox to

110 NEXT I ! Increme nts coun t. 120 END

trigger and to measure dc volts.

command module.

triggers .

voltage during scanning .

variable A.

advance the channel list.

60 HP E1442A Switchbox Command Reference Chapter 3

SCAN:MODE [ROUTe:]SCAN:MODE <mode> sets the Form C switch channels defined

[ROUTe:]SCAN <channel_list> command for "no measurements".

by the

The SWITCH device driver for the E1442A also supports Form C switches which use this command to close appropriate tree relays for a specific kind of measurement (e.g., 2-wire and 4-wire ohms require different tree relay closures). For compatibility in use with the switchb ox device driver, th e E1442A accepts the operation. It’s important to note that the command erases the current list when executed.

NOTE This command erases the current SCAN channel list; SCAN:M ODE must be

followed by a [

Parameters

Parameter Name Parameter Type Range of Values

SCAN:MODE command but it has no effect on Form C

SCAN

ROUTe:]SCA N command to re-establish a scan channel list.

<mode>

discrete NONE | VOLT

Comme nt s • Order of Command Execution: If used, [ROUTe:]SCAN:MODE

must be executed before [ROUTe:]SCAN <chann el_list> because

SCAN:MODE e rases the current SCAN list. Note: The SCAN:MODE command is not needed for Form C Switch operation.

• Related Commands: SCAN

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

SCAN:MODE? [ROUTe:]SCAN:MODE? returns the current state of the scan mode. The

command returns NONE or

VOLT to indicate which mode the scan is set.

Chapter 3 HP E1442A Switchbox Command Reference 61

STATus

Subsystem Syntax STATus

The STATus subsystem reports the bit values of the Operation Status Register (in the command module). It also allows you to unmask the bit s you want reported from the Standard Event Register and to read the summary bits from the Statu s Byte Register.

:OPERation

:CONDition? :ENABle :ENABle? [:EVENt]?

:PRESet

Comments The STATus system contains four software registers (that is, they reside in a

SCPI driver, not in the hardware), two of which are under IEEE 488.2 control: the Standard Event Status Register ( Register (

*STB?). The Operation al Status bit (OPR ), Service Request bit

(RSQ), Stand ard Even t sum mary bit (ESB ), M essage Av ailable bit (MAV) and Questionable Data bit (QUE) in the Status Byte Regi ster (bits 7, 6, 5, 4 and 3 respectively) can be queried with the

*ESE? command to query the unmask value for the Standard Event Status

Register (the bits you want logically OR’d into the summ ary bit). The registers are queried using decimal weigh ted bit valu es. The decimal equivalents for bits 0 through 15 are shown below.

*ESE?) and the Status Byte

*STB? command. Use the

Bit # 15

Decimal

Value

1413121110987 6543210

(MSB)

3276816384 8192 4096 2048 1024 512 256 128 64 32 16 8 4 2 1

(LSB)

A numeric value of 256 executed in a STAT us:OPERation:ENABle <unmask> command allows only bi t 8 to generate a summary bit. The decimal value for bit 8 is 256.

The decimal values are also used in the inverse manner to determine which bits are set from the total value returned by an

EVENt or CONDitio n query.

The SWITCH driver exploits only bit 8 of Operation Status Register. This bit is called the Scan Complete bit whi ch is set whenever a scan operation completes. Since completion of a scan operation is an event in time, you will find that bit 8 will never appear set when queried. However, you can find bit 8 set with the

STAT:OPER:COND? is

STAT:OPER:EV ENt?

query command.

62 HP E1442A Switchbox Command Reference Chapter 3

:OPER:CONDition? STATus:OPERation:CONDition? returns the state of the Condition

Register in the Operation Status Group. The state represents conditions which are part of the instrument’s operatio n. The SWITCH driver does not set bit 8 in this register (see

STAT:OPER:EVENt?).

:OPERation:ENABle STATus:OPERation:ENABle <number> sets an enable mask to allow

events recorded in the Event Register to send a summ ary bit to the Status Byte Register (bit 7). For Form C switch modul es, when bit 8 in the Operation Status Register is set to 1 and that bit is enabled by the

OPER:ENABle command, bit 7 in the Status Regist er is set to 1.

Parameters

Parameter Name Parameter Type Range of Values

numeric 1 through 65535

Comments • 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.

• Related Commands: [ROUTe:]SCAN

Example Enable the Status Register

STAT:OPER:ENAB 256 ! Enabl es b it 8 of the Operat io n

Status Regi ste r to be re port ed to bit OPR in the St atu s Re gi ste r.

:OPERation:ENABle? STATus:OPERati on:E NABle? returns which bits in the Event Register

(Operation Status Group) are unmasked.

Chapter 3 HP E1442A Switchbox Command Reference 63

:OPERation[:EVENt]? STATus:OPERation[:EVENt]? returns which bits in the Event Register

(Operation Status Group) are set. The Event Register indicates when there has been a time-related instrument event.

Comme nt s • 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

• Returned Data after Sending the STATus:O PE Ratio n [:E VENt]?

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.

• Event Register Cleared: Reading the STATus: OPERation:EVENt

• ABORting a Scan: ABORting a scan will leave bit 8 set to 0.

• Related Commands: [ROUTe:]SCAN

Example Reading the Operation Status Register After a Scanning Cycle

STAT:OPER? ! Returns the bit values of the

read the register value !

STATus:OPERat ion[: EVENt ]? command.

Standard Ope rati on St atu s Regist er.

+256

shows bit 8 is set to 1;

shows bit 8 is set to 0.

:PRESet STATus:PRESet affects only the enable register by setting all enable

PRESet does not clear any of the event registers.

64 HP E1442A Switchbox Command Reference Chapter 3

Figure 3-1. HP E1442A Status System Register Diagra m

Chapter 3 HP E1442A Switchbox Command Reference 65

SYSTem

Subsystem Syntax SYSTem

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

Parameters

The SYSTem subsystem returns the error numbers and error messag es in the error queue of a switchbox, and returns the types and descriptions of modules (cards ) in a switchbox.

:CDEScription? :CTYPe? <number> :CPON <number>| ALL :ERRor?

module (card) in a switchbox.

Parameter Name Parameter Type Range of Values

numeric 1 through 99

Comme nts • Form C Switch Module Descrip tion :

SYSTem:CDEScription?<number> command returns:

The

64 Channel General Purpose Switch

for the HP E1442A.

Example Reading the Description of a Card #1 Mod ule

SYST:CDES? 1 ! Determin e the descri ption.

:CPON SYSTem:CPO N <number>|ALL open s all channels of a selected or all

modules (cards ) in a switchbox to their p ower-on state.

Parameters

Parameter Name Parameter Type Range of Values

numeric 1 through 99

Comme nts • Differences Between *RST and CPON: SYSTem:CPON only

opens all channels of a selected module or all modules in a switchbox. and also sets all other settings to their power-on states.

*RST opens all channels of all modules in a switchbox

Example Set All Channels on Module #1 to Power-on State

SYST:CPON 1 ! Sets mod ule #1 c hannels to

power-on sta te (ope n) .

66 HP E1442A Switchbox Command Reference Chapter 3

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

module in a switchbox.

Parameters

Parameter Name Parameter Type Range of Values

numeric 1 through 99

Comme nts • Form C Switch Module Model Number:

SYSTem:CT YPe? <nu mber> comm and r eturns:

The

HEWLETT-PACKARD,E1442A,0,A.08.00

Note: The four fields of the response are, 1) manufacturer, 2) model number, 3) serial number (always 0), and 4) SWITCH firmware revision.

Example Reading the Model Number of a Card #1 Module

SYST:CTYP? 1 ! Determine the model number.

:ERRor? SYSTem:ERRor? returns the error numbers an d corresponding error

messages in the error queue of a switchbox. See Appendix C for a listing of the switchbox erro r numbers and mess ages.

Comme nt s • Error Numbers/Messages in the Error Queue: Each error

generated by a switchbox stores an error number and corresponding error message in the error queue. Each error message can be up to 255 characters long but typically is much shorter.

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

from the queue each time the sent. The errors are cleared first-in, first-out. When the queue is empty, each following 0, "No erro r ". 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 b y -350, "Too many erro rs". Th e least recent error numbers/messages remain in t he queue and th e most recent are discarded.

Example Reading the Error Queue

SYST:ERR? ! Query the error que ue .

SYSTem:ERRor ? query command is

SYSTem:ERRor? query command returns

Chapter 3 HP E1442A Switchbox Command Reference 67

TRIGger

Subsystem Syntax TRIGger

[:IMMediate] TRIGger[:IMMediate] causes a trigge r to occur when the defined trigger

The TRIGger subsystem command s controls the triggering operatio n of the Form C switch modules in a switchbox.

[:IMMediate] :SOURce :SOURce?

source is used to trigger a suspended scan operation.

TRIGger:SOURc e HOL D or TRI Gger:SOURce BUS. This can be

Comme nt s • Executing the TRIGger[:IMMed i ate] Command: A chann el list

must be defined in the and an

TRIGger:IMMediate can trigger the switch box.

INITiate:IMMediate com mand m ust be executed befo re

[ROUTe:]SCAN <channel_list> command

• 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, [ROUT e:]SCAN, TRI Gger :SOURce

Example Advancing Scan Usin g the TRIGger Command

TRIG:SOUR HO L D ! Sets trigger source to hold . SCAN (@100:163) ! Sets channel list. INIT ! Starts scanning cyc le. loop statement ! Starts count loop. TRIG ! Advanc es ch a nne l list to ne x t

channel.

increment loop ! Increments coun t lo op.

68 HP E1442A Switchbox Command Reference Chapter 3

:SOURce TRIGger:SOURce <source> specifies the trigger source to advance the

scanning channel list.

Parameters

Parameter Nam e Parameter Type Descrip tion or

Range of Values

BUS discrete *TRG command

EXTernal disc rete Trig In port

HOLD discrete Hold triggering

ECLTrg

TTLTrg

IMMediate discrete I mmediate triggering

n numeric n = 0 or 1

n numeric n = 0 thru 7

Comments • Enabling the Trigger Source: The TRIGger:SOURce command

only selects the trigger source. The enables the trigger source. The trigger source must be selected using

TRIGger:SOURce command before executing the INIT command.

the

INIT[:IMMediate] command

• One Trigger Input Selected at a Time: Only one input (ECLTrg 0

or 1; TTLTrg 0, 1, 2, 3, 4, 5, 6 or 7; or EXTernal) can be selected at one time. Enabling a different trigger source will auto matically disable the active input. For example, if

TTLTrg 4 is enabl ed , TTLTrg1 will become disabled and TTLTrg4

and

TTLTrg1 is the active input,

will become the active input.

• Using the TRIG command: You can use the TRIGger[:IMMediate]

command to advance the scan when TRIGger:SOURce BUS or

TRIGger:SOURce HOLD is selected.

• Using External Trigger Inputs: With TRIGger:SOURce EXTernal

selected, only one switchbox at a time can use the external trigger input at the HP E1405/E1406 Co mm and Mod ule Trig In port.

• Using TTL or ECL Trigger Bus Inputs: These triggers are from

the VXI backplane trigger lines ECL[0,1] and TTL[0-7]. These may be used to trigger the SWITCH driver from other VXI instruments.

• Using EXTern al | TT L Tr gn | ECL Trgn Trigger Inputs: After using

TRIGger:SOURce EXT | TTLTn| ECLTn, the selected trigger source

remains assigned to th e SWITCH driver until it is relinquished through use of the

TRIG:SOUR BUS|HOL D comm and. While the

trigger is in use by the SWITCH driver, no other drivers operating on the E1405/E1406 Co mman d Module will have a ccess to that particular trigger source. Likewise, other drivers may consume trigger resources which may deny access to a particular trigger by the SWITCH driver. You should always release custody of trigger sources after completion of an activity by setti ng the trigg er sourc e

BUS or HOLD (i.e. TRIG:SOUR BUS|HOLD).

Chapter 3 HP E1442A Switchbox Command Reference 69

• Using Bus Triggers: To trigger the swit chbox wit h

TRIGger:SOURce BUS selected, use the IEEE 488.2 Common

command

*TRG or the HP-IB Group Execute Trigger (GET)

command.

• Trig Out Port Shared by Switc hboxe s: See th e OU TPut command.

• Related Commands: [ROUTe:]SCAN, TRIGger, ABO Rt

• *RST Condition: TRIGger:SOURce IMMediate

Example Scanning Using External Trigg ers

In the following example, the trigg er input is applied to the HP E1405/E1406 Comm and Mo dule Trig In port.

TRIG:SOUR EXT ! Sets trigger source to externa l. SCAN (@100:163) ! Sets channel list. INIT ! Starts scanning cyc le. (trigger externally) ! Advanc es ch a nne l list to ne x t

Scanning Using Bus Triggers

channel.

TRIG:SOUR BUS ! Sets trigger source to bus. SCAN (@100:163) ! Sets channel list. INIT ! Starts scanning cyc le. *TRG ! Advanc es ch a nne l list to ne x t

channel.

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

Command returns either BUS, EXT, HOLD, TTLT0-7, ECLT0-1 or IMM for trigger sources

IMMediate, respectively.

Example Query Trigger Source

TRIG:SOUR EXT ! Sets trigger source to externa l. TRIG:SOUR? ! Queries tri gge r sourc e; re turn s

BUS, EXTernal, HOLD, TTL Trigger, ECL Trigger or

EXT

70 HP E1442A Switchbox Command Reference Chapter 3

SCPI Command Quick Reference

The following tabl e summa rize s the SCPI comman ds for the HP E144 2A 64-Channe l Form C Switch Module used in a switch box.

Command

ABORt Aborts a scan in progress.

ARM :COUNt <number> MIN |MAX

DISPlay :MONitor:CARD <number>|AUTO

INITiate :CONTinuous ON|OFF

OUTPut

[ROUT e:] CLO Se < ch anne l _lis t >

:COUNt? [MIN|MAX]

:MONitor:CARD? :MONitor[:STATe] ON|OFF|1|0 :MONitor[:STATe]?

:CONTinuous? [:IMMediate]

:ECLTrg :ECLTrg [:EXTernal][:STATe] ON|OFF|1|0 [:EXTernal][ : STATe ]? :TTLTrg :TTLTrg

CLOSe? <channel_list> OPEN <channel_list > OPEN? <channel_ li s t> SCAN <channel_li st > SCAN:MODE NONE|VOL T SCAN:MODE?

n[:STATe] ON|O F F|1|0 n[:STATe]?

n[:STATe] ON|OFF|1|0 n[:STATe]?

Multiple scans per INI T comm and. Queries nu mb er of scans.

Selects module to be monitored. Queries the ca rd nu mb er. Selects monitor mode. Queries the m onit or mode.

Enables/disab les continuo us sca nning. Queries co ntin uous scan stat e Starts a scanning cycle.

Enables/disables the spec ified ECL trigg er line. Queries the sp ecif ied ECL trigger line . Enables/disab les the Trig Out por t on the HP E1405/E 14 06. Queries the ex te rna l stat e. Enables/disable s the specified TT L trigger line . Queries the sp ecif ied TTL t rigg er line.

Closes channel(s). Queries channe l(s) closed. Opens channel(s). Queries channe l(s) opened. Defines channels for scanning. Sets scan mode ( has no effec t on Form C oper at ion) . Queries the sc an m ode.

Description

STATus :OPERation:CONDition?

SYSTem :CDEScription? <number >

TRIGger [:IMMediat e]

:OPERation:ENABle :OPERation:ENABle? :OPERation[:EVENt ]? :PRESet

:CTYPe? <number> :CPON <number >|ALL

:ERRor?

:SOURce BUS :SOURce EXTernal :SOURce HOLD :SOURce IMMediate :SOURce:ECLTrg :SOURce:TTLTrg n :SOURce?

Returns content s of the Oper at ion Condit ion Regist er. Enables events in the Operation Event Register to be reported. Returns the mask value set by the :ENABle command. Returns the cont ent s of the O per atio n Event Regist er. Sets Enable Register bits to 0.

Returns description of module in a switchbox. Returns the module type. Opens all channels on specified module(s ). Returns error numbe r/m essage in a switc hbox Error Queue.

Causes a trigger to occ ur. Trigger source is *T RG . Trigger source is Trig In (on the HP E1405 or E1406). Holds off triggering. Trigger source is t he int ern al tr igger s. Trigger is the VXIbus ECL trigger bus line Trigger is the VXIbus TTL trigg er bus line Queries sc an trigge r source .

Chapter 3 HP E1442A Switchbox Command Reference 71

IEEE 488.2 Common Command Reference

The following table lists the IEEE 488.2 Common (*) commands accepted by the HP E1442A 64-Channel F orm C Switch Mo dule. The operation of some of these commands is described in Chapter 2 of this manual. For more information on Common command s, refer to the user’s manual for your HP E1400/E1401 Mainframe, or the ANSI/IEEE Standard 488 .2-1 987.

Command Command Description

*CLS Clears all status registers (see STATus:OPERation[:EVENt ]? ) and clears the error queue.

unmask>

*ESE< *ESE? En able Standa rd Event Query. *ESR? Standard Event Register Query. *IDN? Ins trum ent ID Qu ery; ret urn s ident ifica tion string of the module. *OPC Operation Complete. *OPC? Operation Complete Query. *RCL<

n> R e calls the inst rumen t stat e saved by *SAV. You must recon figu re the sc an list.

*RST Resets the module. Opens all channels an d invalidates cu rrent chan nel list for scanning .

*SAV<

unmask>

*SRE< *SRE? Service request enable query. *STB? Read status byte query. *TRG Triggers the modu le to advanc e the scan when sca n is enabled and trigge r source is

*TST? Self-test. Executes an int er nal self -test and retur ns only t he first er ror enco unt ered.

Enable Standard Event .

Sets ARM:CO UN 1, TRIG: SO UR IMM , and INI T: CO NT OFF. Stores the inst r um ent stat e but does not save the scan list. Service request enab le, en ables status register bits .

TRIGger:SOURce BUS.

Does not retu rn multip le errors . The following is a list of responses yo u can ob ta in where "cc" is the card number with the leading zero deleted .

+0 if self test pa sses. +cc01 for firmware error.

+cc02 for bus error (problem communicat ing with the mod ule).

+cc03 for incorrect ID informat ion read back from the mod ule’s ID regist er. +cc10 if an interrupt was expected bu t not receive d. +cc11 if the busy bit was not held for a sufficien t amou nt of time.

*WAI Wait to Complete.

NOTE These commands apply to many instrum ents. See the user’s manual for

your HP E1400/E1401 Mainframe, or the ANSI/IEEE Standard 488 .2-1 987 for more information about these commands . The common commands

*RCL, *SAV and *TST? do specific actions with the HP E1442A an d are

described in the above table in "Co mm an d D escrip tion".

72 HP E1442A Switchbox Command Reference Chapter 3

Appendix A

HP E1442A Form C Switch Specifications

Maximum Input Voltage:

High to Low Any terminal to chassis 150VDC 150VDC 150VAC RMS 150VAC RMS 210VAC Peak 210VAC Peak

(Maximum with internal jumpers installed or use of option 010 t erminal modul e ):

High to Low Any terminal to chassis 60VDC 60VDC 30VAC RMS 30VAC RMS 42VAC Peak 42VAC Peak

Maximum Current (per switch):

lA DC or lA AC RMS

Maximum Power:

Per switch: 40W DC, 40VA AC Per module: 320W DC, 320VA AC

Thermal Offset: <70 µV per channel

Closed Channel Resistance:

<1.5Ω typ i c al <3.5Ω at end of relay life

Power Up/Down Sta tes: All Open

Typical Tim e to Open/Close a Chan nel: 13mS

Module Size/Device Type: C, register based

Installation Category: IC 1

Connectors Used: Pl and P2

Number of Slots: 1

VXIbus Interface Capability: Interrupter, D16

Interrupt Level: 1-7, selectable

Power Requirements:

Peak Module Current Voltage: IPM: 0.10A 0.24A Dynamic Module Current Voltage: IDM: 0.11A 0.01A

Watts/Slot: 1.0

+5V +12V

Insulation Resistance:

(between any two points):

Bandwidth: -3dB at 10 MHz

Crosstalk, Channel to Cha nnel :

Capacitance:

Relay Life (typical):

Ω at 40°C, 65% RH

>10

Ω at 25°C, 40% RH

>10

<100 kHz: <-70dB <10 MHz: <-30dB

Common to NO or NC: <40pF Channel to Channel: <30pF

No load: >10 Max. load: >10

operations

Maximum Transient Voltage: 1300V Operating Temperature: 0° to 55°C Storage Temperature: -40° to 75°C Operating Humidi ty: 40°C and` 95% RH

Operating Location: Intended for indoor use only

IEC Pollution Deg ree 2 (No rmally on ly

non-conductive poll utio n occurs. Occasionally , however, a temporary conductivity caused by condensation mus t be expected. See p age 74 .)

Appendix A HP E1442A Form C Switch Specifications 73

Definition of Term s:

Pollution: Any additio n of foreign matter, solid, liquid or gaseous (ionized gases), th at may produce a

reduction of dielectric strength or surface resistivity.

Pollution D eg ree: For the purpose of evaluating CLEARANCES, Pollut ion Degree 1 and Pollution Degree 2 are recognized for use in the micro-environment.

Pollution D eg ree 1 : No pollution or only dry, non-conductive poll utio n occu rs. The pollutio n has no influence.

Pollution D eg ree 2: Normally onl y non-conductive pol luti on occurs. Occasionally, however, a temporary conductivity caused by condensation mu st be exp ected.

Clearance: The shortest distance in air between two conductive parts.

74 HP E1442A Form C Switch Specifications Appendix A

HP E1442A Form C Switch Register

Programming & Definitions

About This Appendix

This appendix contains the inform ation yo u need for register-based programming. The contents include:

• Register Programming vs. SCPI Prog rammi ng. . . . . . . . . . . Page 75

• Addressing the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 75

• Register-Based Programming the HP E1442A. . . . . . . . . . . Page 78

• Register Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 83

• Programming Exampl es. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 87

The HP E1442A 64-Channel Form C Switch Module is a register-based module which does not support the VXIbus word serial proto co l. When a SCPI command is sent to the Form C switch, the HP E1406A Comman d Module parses the command and programs th e switch at the register level.

Appendix B

NOTE If SCPI is used to control this module, then r egister programm ing is not

recommended. The SCPI Drive r maintains an image of the card state. The driver will be unaware of changes to the card state if you alter the card state by using register w rites.

Register-based programming is a series of reads and writes directly to the Form C switch registers. This increases throughput speed since it eliminates command parsing and allows the use of an embedded control l er. Also, if slot 0, the resource manager, and the computer (HP-IB) interface are provided by other devices, a C-size system can be downsi zed by removing the comm and mo dule.

Addressing the Registers

Register addresses for register-based devices are located in the upper 25% of VXI A16 address space. Every VXI device (up to 256 de vices) is a llocated a 32-word (64-byte) block of addresses. With seven registers, the HP E1442A Form C Switch Module uses seven of the 64 a ddresses allocated.

Appendix B HP E1442A Register Programming & Definitions 75

The Base Address When you are reading or writing to a switch register, a hexadecimal or

decimal register address is specified. This address consists of a base address plus a register offset.

The base address used in register-based programming depends on whether the A16 address space is outside or inside the HP E1406A Com mand Module .

A16 Address Space

Outside the Command

Module

A16 Address Space

Inside the Command

Module or Mainframe

When the HP E1406A Command Mod ule is not part of your VXIbus system (Figure B-1), the switch’s base address is comput ed 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 switch’s logical address, and 64 is the number of address bytes per VXI device. For example, the switch’s factory-set logical address is 120 (78

). If this address is not changed, the switch will have a

base address of:

C00016 + (120 * 64)16 = C00016 + 1E0016 = DE00

or (decimal)

49,152 + (120 * 64) = 49,152 + 7680 = 56,832

When the A16 address space is inside the HP E1406A Command Module (Figure B-2), the switch’s base address is comput ed as:

1FC00016 + (LADDR * 64)16 or 2,080,768 + (LADDR * 64)

where 1FC00016 (2,080,768) is the starting locatio n of the VXI A16 addresses, LADDR is the switch’s logical address, and 64 is the numb er of address bytes per register-based device. Again, the switch’s factory-set logical address is 120. If this address is not changed, the switch mod ule will have a base address of:

1FC00016 + (120 * 64)

= 1FC00016 + 1E0016 = 1FDE00

2,080,768 + (120 * 64) = 2,080,768 + 7680 = 2,088,448

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 E1405A/B and E 1406A Command Modules.

76 HP E1442A Register Programming & Definitions Appendix B

For example, the switch’s Status/C ontrol Register has an offset of 04 When you write a command to this register, the offset is added to the base address to form the register address:

DE00 1FDE00

+ 0416 = DE04

+ 04

= 1FDE04

56,832 + 4 = 56,836 2,088,448 + 4 = 2,088,452

Figure B-1. Register within A16 Address Spac e

Figure B-2. Registers with in the HP E1406 A16 Address Space

Appendix B HP E1442A Register Programming & Definitions 77

The HP E1442A Form C Switch Module is a register-based slave device. There are 64 independent switches on the card which are controlled using the Switch Control Regi sters. There are four register types on this module:

• ID Register - Identifies Hewlett-Packard as the manufacturer, and

that the card is an A16 register-based device.

• Device Type Register - Identifies card as an HP E1442A.

• Status/Control Register - When read from, it is used to return

device- specific status information. When written to, it is used to set control bits.

• Switch Enable Regist ers - These four registers control the state of

the Form C switches on the module (e.g. close or open the switch).

The register definitions are listed later in this chapter.

Reading or Writing

to HP E1442A

Registers

with Logical

Address

(Command Module)

Note Refer to the HP El405/E1406 Command M odul e documentati on for use of

To read or write to specific registers you must address a particular register within a module. The registers with in a module are located using a fixed offset. The module address is based on the module’s logical address. There are two basic ways of accessing registers. One method uses the logi cal address directly to access a particular card using VXI:READ and VXI:WRITE commands through a co mm and mod ule. The oth er method ca n be used with an embedded controll er that lo cates A16 data space withi n its memory map. The memory map ping allows registers to be directly re ad or written with moves to/from memory.

The factory setting of the logical address switch is 120 (78 used in the following examples.

When using the HP El405 or E1406 Command M odul e to acc ess registers via VXI:READ and VXI:WRITE commands, the logical addr ess is used to determine which VXI module is being accessed.

the VXI:READ and VXI:WRITE commands and oth er related commands.

). This value is

78 HP E1442A Register Programming & Definitions Appendix B

The following commands a r e sent to the HP El406 Command Module via the HP-IB. The example below shows a portion of an HP BASIC program. The controller could either be external or embedded in the VXI mainframe. This example shows the Status/Co ntrol R egister being a c cessed.

! Writes FFFF hex to Control Register

OUTPUT 70900; "VXI:WRITE 120, 4, #HFFFF"

! Reads from Status Register

OUTPUT 70900;"VXI:REA D 120,4 " ENTER 70900; Status

with Memory

Mapping

(Embedded

Controller)

Note Refer to the manual for the specific embedded controller that you are using

When using an embedded controller, VXI A16 address space is usuall y mapped to some block of memory within th e contro ller’s addressab le memory space.

to determine where VXI Al6 is mapped. There may be other methods of accessing the VXI backplane. What is shown here is the method in which Al6 addresses are calculated for a module.

For example, for the HP 75000 Series C Mainframe with an HP El405/E1406 Comm and Mo dule, VXI Al6 address spa ce starts at lF0000

. In the HP El405/E1406 Command M odul e, the Al6 sp ace is

divided so modules are addressed only at locations begin ning with C000 within Al6. Each modu le is allocated 64 register ad d resses (4 016). The module base address is related to the logical address set by the logical address switch on the module:

(base address)

= (logical address)16 * 4016 + C000

For the Form C switch, the factory-set logical address is 120 (7816), so to address the Status/Cont rol Regis te r of a Form C switch using the HP El405 Command Module:

base address = (7816)*(4016) + C000

+ DE0016 + 0416 = 1FDE04

= DE00

+ [base address]16 + [register offset]

Appendix B HP E1442A Register Programming & Definitions 79

Reading th e

HP E1442A

Registers

You can read the following Form C switch registers:

• ID Register (base + 00

• Device Type Register (base + 02

• Status/Contro l Registe r (base + 04

• Switch Enable Register for channels 0 - 15 (base + 10

• Switch Enable Register for channels 16 - 31 (base + 12

• Switch Enable Register for channels 32 - 47 (base + 14

• Switch Enable Register for channels 48 - 63 (base + 16

ID Register For the Form C switch, a read of the ID Register (base address + 00

returns FFFF

since the switches are manufactured by Hewlett-Packard

)

and are A16 only, register-based devices. The Device Type Register (base + 02

) returns 02 2816.

Device Type Register For the Form C switch, a read of the Device Type Register (base address +

) returns 022816. This indicates it is a model HP E1442A.

Status/Control Register Each relay requires about 13 msec execution time (close to open or open to

close) during which time the switch is "busy" . A read of the Status/Con trol Register (base + 04 returns a 0 in bit 7 when the module is busy.

An interrupt is generated after any of the Switch Enable Registers are written. Bit 6 of the Status Register is used to enable/ disable interrupts from the card. If bit 6 is returned as a 0, interrupts are enabled. If bit 6 is returned as a 1, interrupts are disabled.

) returns a 1 in bit 7 when the module is not busy or

Bit 14 is the MODID bit. When a 0 is returned in bit 14, the module has been selected with a high state on the P2 MODID line (this occurs during turn-on). If a 1 is returned, the module has not been selected.

Switch Enable Register A read of any of the Switch Enable Registers always returns FF FF

regardless of the channel states.

Writing to

You can write to the following Form C switch registe rs:

HP E1442A

Registers

• Status/Contro l Registe r (base + 04

• Switch Enable Register for channels 0 - 15 (base + 10

• Switch Enable Register for channels 16 - 31 (base + 12

• Switch Enable Register for channels 32 - 47 (base + 14

• Switch Enable Register for channels 48 - 63 (base + 16

)

80 HP E1442A Register Programming & Definitions Appendix B

Status/Control Register Writing a 1 to bit 0 of the Status/Control Register (base + 04

switch module (all channels open). Resetting the module enables interrupts.

Note It is necessary to write a 0 to bit 0 after the reset has been performed before

any other commands can be programmed and executed.

To disable the interrupt generated when channels are opened/closed, write a

1 to bit 6 of the Status/Control Register.

Note Typically , interrupts are disabled when doin g register-level access to a

module. Refer to the operating manual of the command module or the embedded controller being used in order to handle interrupts. Int e rrupts are re-enabled after a reset.

Bit 12 provides status on fuse F4. This is a user-installed componen t required to provide the +5V pullup vol tage to the mod ule’s internal bus for the NC and NO contacts. A 0 indicates the fuse is not installed (or the fuse is blown if installed); a 1 indicates you previousl y inst alled the fu se and it is good.

) to reset the

Switch Enable

Registers

Note All r elays are non-latching and will open during a power-down.

Writes to the Switch Enable Registers (base + 1016 through base + 1616) enable you to open or close the desired channel. For example, write a bit 2 of the Switch Enable Register (base + 10 write a

0 to bit 15 of the register at base + 16

) to close channel 02. Or,

to open channel 63.

1 to

Appendix B HP E1442A Register Programming & Definitions 81

A switch is open when contact is made between the normally closed (NC) contact and common (C). It is closed when contact is made between the normally open (NO) contact and common (C). Any combination of open or closed states is allowed at one time for all channels on the module.

Write a "1" to the register bit to close the relay.

Write a "0" to the register bit to open the relay.

82 HP E1442A Register Programming & Definitions Appendix B

Manufacturer ID Register (a read only register)

Address b + 00

Read Manufacturer ID; Returns

Address b + 02

Read Returns

Address b + 04

Write* Undefined D Undefined R

Read** Un-

1514131211109876543210

FFFFh = Hewlett-Packard A16 only register-based device.

Device Type Register (a read only register)

1514131211109876543210

0228

Status/Control Register

1514131211109876543210

MUn-

def

S1 Undefined B D Undefined R

def

for the E1442A module.

The following two tables describ e Status/Con trol Regi ster b its:

*WRITE BITS (Status/Control Register) bit 0 R Writing a 1 to this bi t r esets th e swi tch to th e pow er- on st a te (a ll

channels o pen). To rese t, you must keep this bit set to 1 for a minimum of 100 ms and then you must set bit 0 back to a logical 0 to allow switches to be closed.

bit 6 D Disable interrupt by writing a 1 to this bit (this is set back to 0 with a

reset).

Appendix B HP E1442A Register Programming & Definitions 83

**READ BITS (Status/Control Register) bit 0 R A 1 at this bit resets the switch to the power-on state (all channels

open). You must set bit 0 back to a logical 0 to allow switches to be

closed. bit 6 D Interrupt Status; 1 = disabled, 0 = enabled. bit 7 B Busy Status; 1 = not busy, 0 = busy. bit 12 S1 Fuse F4 Statu s; 0 = fuse F4 not installed (factory ship pe d witho ut

fuse) .

(A 0 can indicate a blown fuse after installing

fuse F4.)

1 = fuse F4 is installed (user must install fuse).

Fuse F4 provide s +5V pull-up voltag e for the NC and NO switch

contacts by use of the module’s internal bus (see figures 1-7 and 1-8). bit 14 M MODID bit; if the bit is 0, module has been sele cte d durin g turn -on.

Normally this bit is 1 when not in the turn-on cycle.

84 HP E1442A Register Programming & Definitions Appendix B

Swi tc h E nable

Regi sters

You write to the switch enable registers to close (or open) a channel.

Write a "1" to the register bit to close the relay.

**Reading any Switch Enable Regi ster will always return FFFF

Write a "

regardless of the channel states.

Switch Enable Regis ter (Cha nnel s 0 - 15)

Address b + 10

Write*

1514131211109876543210

Ch15 Ch14 Ch13 Ch12 Ch11 Ch10 Ch09 Ch08 Ch07 Ch06 Ch05 Ch04 Ch03 Ch02 Ch01 Ch00

Read** Always returns FFFF

Switch Enable Register (Channels 16 - 31)

Address b + 12

Write*

1514131211109876543210

Ch31 Ch30 Ch29 Ch28 Ch27 Ch26 Ch25 Ch24 Ch23 Ch22 Ch21 Ch20 Ch19 Ch18 Ch17 Ch16

0" to the register bit to open the relay.

Read** Always returns FFFF

Switch Enable Register (Channels 32 - 47)

Address b +14

Write*

Read** Always returns FFFF

1514131211109876543210

Ch47 Ch46 Ch45 Ch44 Ch43 Ch42 Ch41 Ch40 Ch39 Ch38 Ch37 Ch36 Ch35 Ch34 Ch33 Ch32

Appendix B HP E1442A Register Programming & Definitions 85

Switch Enable Register (Channels 48 - 63)

Address b +16

Write*

1514131211109876543210

Ch63 Ch62 Ch61 Ch60 Ch59 Ch58 Ch57 Ch56 Ch55 Ch54 Ch53 Ch52 Ch51 Ch50 Ch49 Ch48

Read** Always returns FFFF

86 HP E1442A Register Programming & Definitions Appendix B

Programming Examples

Beginning of Program /* This program resets the HP E1442A, closes channels and r eads the*/

/* switch’s relay control registers, opens channels and scans all 64*/ /* channels on the module. */

#include <sicl.h> #include <stdio. h> #include <stdlib.h> #include <math.h > #include <dos.h >

/* function prototypes */ void reset_sw(char *base_addr); void delay (unsigned millisecond s);

Program Main void main(void)

{

double ldexp(double i, int exp); char *base_addr; int j, k; unsigned short chan_0_15 _reg, chan_16_31 _r eg; /* First 32 channels */ unsigned short chan_32_4 7_reg, chan_48_6 3_reg; /* Second 32 channels */ unsigned short id_reg, dt_reg; /* ID and device type */ unsigned short stat_reg; /* Status Register */ /* create and open a device session */ INST e1442a; e1442a = iopen("vxi ,120" );

Read ID and Device

Type Registers

/* map the E1442A registers into user memory sp ace */ base_addr = imap(e1442a, I_MAP_VXIDEV, 0, 1, NULL);

/* clear the user screen */ clrscr();

/* reset the E1442A */ reset_sw(base_addr);

/********** read the switch’s ID and Device Type registers ****** **** /

id_reg = iwpeek((unsigned short *)(base_addr + 0x00)); dt_reg = iwpeek((unsigned short *)(base_addr + 0x02)); printf("ID register = 0x%4X\nDevice Type register = 0x%4X\n", id_reg, dt_reg);

Appendix B HP E1442A Register Programming & Definitions 87

Read Status Register /********** read the switch’s Status R egister **** **** */

stat_reg = iwpeek((unsigned short *)(base_addr + 0x04)); printf("Status register = 0x%4X\n", stat_reg);

Close and Open

Channels

/********** close and open channels **********/

/* set all bits in register for channels 0-15 (offset 10) to 1 */ iwpoke((unsigned short *)(base_ addr + 0x10), 0xffff);

/* read the E1442A relay control registers and print their value*/ /* NOTE: relay control registers always return FFFF (hex) */

chan_0_15_reg = iwpeek((unsigned short *)(base_addr + 0x10)); chan_16_31_reg = iwpeek((unsigned short *)(base_addr + 0x12)); chan_32_47_reg = iwpeek((unsigned short *)(base_addr + 0x14)); chan_48_63_reg = iwpeek((unsigned short *)(base_addr + 0x16));

printf("Channels 00-15 register = 0x%4X\n", chan_0_15_reg); printf("Channels 16-31 register = 0x%4X\n", chan_16_31_ reg); printf("Channels 32-47 register = 0x%4X\n", chan_32_47_ reg); printf("Channels 48-63 register = 0x%4X\n", chan_48_63_ reg);

delay (100); /* wait 100 milliseconds before resetting module */

/* reset the E1442A to open all closed channels */ /* NOTE: writing a 0 to the channels registers will also open channels */ reset_sw(base_addr);

Scan Channels /********** scanning channels **********/

/* scan channels 0-15 (register offset 10) */ for (k=0; k15; k++) {

iwpoke ((unsigned short *)(base_add r + 0x10), ldexp(1,k));

delay (50); /* delay to allow mechanical relays to close*/ } /* sets all bits to 0 to open last closed channel */ iwpoke ((unsigned short *)(base_addr + 0x10), 0);

/* scan channels 16-31 (register offset 12) */ for (k=0; k15; k++) { iwpoke ((unsigned short *)(base_addr + 0x12), ldexp(1,k)); delay (50); } /* sets all bits to 0 to open last closed channel */ iwpoke ((unsigned short *)(base_addr + 0x12), 0);

88 HP E1442A Register Programming & Definitions Appendix B

/* scan channels 32-47 (register offset 14) */ for (k=0; k15; k++) {

iwpoke ((unsigned short *)(base_add r + 0x14), ldexp(1,k));

delay (50); } /* sets all bits to 0 to open last closed channel */ iwpoke ((unsigned short *)(base_addr + 0x14), 0);

/* scan channels 48-63 (register offset 16) */ for (k=0; k15; k++) {

iwpoke ((unsigned short *)(base_add r + 0x16), ldexp(1,k));

delay (50); } /* sets all bits to 0 to open last closed channel */ iwpoke ((unsigned short *)(base_addr + 0x16), 0);

/* close session */ iclose(e1442a);

} /* end of main */

Reset Function /**********************************************************/

void reset_sw(char *base_addr)

/* reset the module; open all r elays (writ e a 1 to status bit 0) */ /* delay 100 ms for reset then set bit to 0 to allow closing of */ /* switches */

{

/* this function resets the switch mod ule */ iwpoke((unsigned short *) (base_ addr + 0x04), 1); delay (100); iwpoke((unsigned short *) (base_ addr + 0x04), 0); }

}

Appendix B HP E1442A Register Programming & Definitions 89

Notes

90 HP E1442A Register Programming & Definitions Appendix B

Appendix C

HP E1442A Form C Switch Error Messages

Error Types

Errors with negative values are governed by the SCPI standard and are categorized in the table below.

Categories of SCPI Errors

-199 to -100 Command Errors (syntax and parameter errors). See HP E1405/E1406 Command Module user’s manual for descriptio n of these errors.

-299 to -200 Execution Errors (instrument driver detected errors). See following table for these valu es (also, see HP E1405/E1406 Command Module user’s manua l for further details).

-399 to -300 Device Specific Errors (instrument driver errors that are not command nor execution errors). See following table for these values (also, see HP E1405/E1406 Command Module user’s manua l for further details).

-499 to -400 Query Errors (problem in querying an instrument). See HP E1405/E1406 Command Module user’s manual for descriptio n of these errors.

The table on the following page lists all the error messages that can be generated by the HP E1442A Form C Switch Module. Error numbers with positive values are not governed by the SCPI standard.

Appendix C HP E1442A Form C Switch Error Messages 91

Form C Switch Error Messages

Code Error Message Potential Cause(s)

-211 Trigger ignore d Trigger received whe n scan not enabled. Trigger received aft er scan

-213 Init Igno red Attempt ing to execute an INIT co mman d when a sc an is alrea dy in pro gre ss.

-222 Data out of range Parameter value is outside va lid range .

-224 Illegal para mete r value Attempt ing to execu te a command with a paramete r not applicable to the

-240 Hardwar e error Command failed due to hard ware problem.

-310 System error Internal drive r error. This error can result if an exce ssively long para me ter

1500 External trigger sour ce

already allocated

1510 Trigger source non -existe nt Selected trigger source is not availab le on this platfor m (e.g. some trigge rs

2000 Invalid card numbe r Addressing a module (card) in a switchbox that is not part of the switchbox. 2001 Invalid channel numbe r Attem ptin g to address a ch anne l of a module in a switchbox that is not

2006 Command not suppor ted

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

channel list

complete. Trigger too fa st.

command.

list is entered. Assigning an exte rna l trigger sourc e to a switchbox wh e n the trigger source

has already been assigned to anot he r switchbox.

are not available on the E1300/E1 301 VXI B-size mainfr ames) .

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

the modu le.

Attempt ing to address m or e channels t han av a ilable in the sw itchbox.

2010 Scan mode not allowed on

this card 2011 Empty channel list 2012 Invalid Channel Range

2017 Config error 17, S lot 0

functions disabled 2600 Function not supported on

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

The selected scann ing mode is not al lowed with this module or you have misspelled the mode par am eter (see SCAN: MO DE comma nd) .

No valid channels are specifie d in the Invalid channel(s) specif ied in SCAN

to begin scanning when no valid chann el list is defined. Attempt to run a downloaded scan list with ARM :COUNt set to a value other

than 1. Applies to HP FET switches only. Sending a command to a module (card) in a switchbox that is not supported

by the module or switchbox.

<channe l_li st>.

<channe l_li st> com m and. Attempting

92 HP E1442A Form C Switch Error Messages Appendix C

Appendix D

HP E1442A Option 010 Terminal Module

About This Appendix

This appendix do cuments the HP E1442A Option 010 Te rminal M odul e. With this terminal mod ule the user can easily add components to configure a variety of passive signal condi tion ing circuits includi ng pul lups , pulldowns, and both single-ended and differential resi stiv e dividers and filters. The user connects to the module by soldering wires or co mpo nents to the terminal mo dule PC board.

Figure D-1 is an overview of channels 0 and 1 and all associated component and voltage connections (resistors, capacit ors, jumpers and voltages). Note the correlation of R0/C0 and R1/C1 with channels 0 and 1 respectively (also the associated voltage nod e V0-7 and user-supplied resist or SIP).

Figure D-1. Option 010 Terminal Modu le User Connect ions

Appendix D HP E1442A Option 010 Terminal Module 93

Figure D-2. HP E1442A Option 010 Terminal Modu le

94 HP E1442A Option 010 Terminal Module Appendix D

Straight-Through Configuration Example

Any channel of the terminal module can be configured as a straight-through Form C relay. In this mode no resistors or capacitors are included. A two-position jum per is placed on the mode selection jumper.

Figure D-3. No components are added .

Set one conf igu ratio n jumper as ill ustrated bel ow (INL INE).

Appendix D HP E1442A Option 010 Terminal Module 95

Resistor Divider Configuration Example

Any channel can be configured as a resistor divider connected to the normally open contact of the Form C relay. The user-supplied SIP resistor can be replaced by a standing resistor with it inserted in the solder hole of the SIP and a solder hole directly across from it. The row of solder holes is connected to V24-31. The example below shows the voltage sold er holes and identifies th e voltage the row is connected to.

Figure D-4. Components to be added: Resistor R25 and SIP resistor pack

RP24-31. Set one configuratio n jumper as ill ustrated below (L P/DI V).

96 HP E1442A Option 010 Terminal Module Appendix D

Low-Pass Filter Configuration Example

Any channel can be configured as a low -pass f ilter c onnected to the nor ma lly ope n c ontact of the For m C r elay.

Figure D-5. Componen ts to be added : Resistor R25 and Capacito r C25.

No configu rati on jumpers req uired .

Appendix D HP E1442A Option 010 Terminal Module 97

Common Terminal Pullup Configuration Example

Any channel can be configured as a pullup (or pulldown) resistor connected to any of the contacts of the Form C relay. The figure below shows channel 25 with the pullup attached to the COM contact .

Figure D-6. Components to be added : SIP resistor pack RP24-31.

Set two configuration jumpers as illustrated bel ow (PU COM).

98 HP E1442A Option 010 Terminal Module Appendix D

Normally Closed Terminal Pullup Configuration Example

Any channel can be configured as a pullup (or pulldown) resistor connected to any of the contacts of the Form C relay. The figure below shows channel 25 with the pullup attached to the NC contact.

Figure D-7. Component s to be added: SIP resistor pack RP24-31.

Set two configu ratio n jumpers as ill ustrated below (PU NC).

Appendix D HP E1442A Option 010 Terminal Module 99

Normally Open Terminal Pullup Configuration Example

Any channel can be configured as a pullup (or pulldown) resistor connected to any of the contacts of the Form C relay. The figure below shows channel 25 with the pullup attached to the NO contact.

Figure D-8. Components to be added : SIP resistor pack RP24-31.

Set two configuration jumpers as illustrat ed below (PU NO).

100 HP E1442A Option 010 Terminal Module Appendix D

Agilent E1442A Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual