PLZ-U Remote Control 6-3
6.3 Using SCPI Commands
6.3.1 Hierarchy of SCPI Commands
SCPI commands are ASCII-based commands designed for test and measurement
devices. The command hierarchy is structured around the common root or node,
which is the construction block of the SCPI sub system.
There are two types of SCPI commands: Set and Query.
Set commands execute a certain function of the PLZ-U or modify the settings.
Query commands inquire settings and status of the PLZ-U.
Messages
The information that is exchanged between the controller and the device is called a
device message.
There are two types of device messages, commands that are sent from the computer
to the PLZ-U and responses that are sent from the PLZ-U to the computer.
Commands
A command is constructed by a single message or a combination of multiple mes-
sages using keywords, parameters, and punctuations.
Commands can be subdivided into set commands and query commands.
Set commands
Set commands execute a certain function of the device or modify the settings.
Query commands
Query commands (queries) inquire settings and status of the device.
Query messages end with a question mark.
Responses
Responses are messages that are sent from a device to the computer or another
device.
Responses convey the status of the device or measured values to the computer or
another device.
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