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Relay Multiplexer Command Reference 47

Chapter 5

Relay Multiplexer Command Reference

Using This Chapter

This chapter describes Standard Commands for Programmable Instruments (SCPI)

and summarizes IEEE 488.2 Common (*) Commands applicable to all four

16-Channel Relay Multiplexer Modules.

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

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

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

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

Command Types

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

Commands.

Common

Command

Format

The IEEE 488.2 standard defines the Common Commands that perform functions

like reset, self-test, status byte query, etc. Common Commands are four or five

characters in length, always begin with the asterisk character (*), and may include

one or more parameters. The command keyword is separated from the first

parameter by a space character. Some examples of Common Commands are shown

below:

*RST *ESR 32 *STB?

SCPI

Command

Format

SCPI commands perform functions like closing switches, making measurements,

querying instrument states, or retrieving data. A subsystem command structure is a

hierarchical structure that usually consists of a top level (or root) command, one or

more lower level commands, and their parameters. The following example shows

part of a typical subsystem:

[ROUTe:]

CLOSe <channel_list>

SCAN <channel_list>

:MODE?

[ROUTe:]

is the root command, CLOSe and SCAN are second level commands with

parameters, and

:MODE? is a third level command.

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Agilent Technologies E1345A Manual do Utilizador Página 46