User`s manual

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.