Scpi Command Reference; Command Syntax - TDK-Lambda GENESYS Series User Manual

11.

SCPI COMMAND REFERENCE

11.1. Command Syntax

11.1.1. General SCPI Rules
Terminator: For VISA, no terminator is required. For TCP or UDP sockets, a
terminator is recommended.
Acceptable terminators are line-feed, carriage-return, or semi-colon.
Characters: commands are made of printable letters, numbers, spaces and some
punctuation. Letters may be capital or small; commands are not case-sensitive.
Spaces: there must be no spaces within the command. There must be a space
between a command and its parameter (or setting).
Abbreviations: most SCPI words have an abbreviated form. The full word or the full
abbreviation must be used, no partial abbreviations are allowed.
Numbers: numbers may have leading and trailing decimal zeroes, up to 12
characters total. The "+" is optional for positive values. The decimal point is optional
for whole numbers. Commas for European style decimals are not allowed.
Exponential numbers (example: "1.35E+2") are not allowed
Errors: If a command syntax is not correct, or if a setting is not acceptable, then the
command is ignored. To check if the command is accepted, it is necessary to read
from the SYSTEM:ERROR queue (see section 11.8.1). The Standard Event Status
Register also has a bit to indicate command errors (*ESR, see section 11.8.8)
Command Queries: almost every command has a query form to read back the
command's last setting. The query form replaces the command's parameter with a
question mark. No space is allowed between the command and the "?". For example,
if the command "VOLT 23" is sent, the query form "VOLT?" will respond with "23"
Multiple Commands in One Line: Several commands may be sent as one line if
they are separated by a semi-colon. These are also called concatenated commands.
If one of the commands returns an error, the subsequent commands will execute, if
possible. Do not put two queries in one concatenated command because the
response from first query cannot be read back
11.1.2. Document Syntax
Courier Font
ABBReviations
Square Brackets
Angle Brackets
Bar
Asterisk
Whole Numbers
Decimals
8303460000 Rev A
Represent SCPI commands or responses
Capital letters are required, small letters are optional
[ ]
Items in square brackets are optional.
< >
Items in angle brackets are command parameters.
Vertical bar means "OR", select one of either item.
|
1|0|ON|OFF means 1 or 0 or ON or OFF acceptable.
*
Required identifier for IEEE-488.2 common commands.
nn
Whole numbers with no decimal point allowed.
nn.nn
Decimal numbers with optional decimal point.
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