Appendix A SCPI Command Reference
Common commands
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Common commands
The common commands are understood by all SCPI and IEEE 488.2 instruments.
Their purpose is to perform general tasks and to read or work with the registers
common to all SCPI instruments. The following common commands have been
implemented.
General common
commands
*CLS
*IDN?
*OPC
Syntax
:*CLS
Parameters
There are no parameters.
Description
Resets the entire status reporting system:
– The service register will be cleared (all bits will be set to 0).
– The event status register will be cleared (all bits will be set to 0).
– The error message queue will be emptied.
– All event-type registers will be cleared.
Query
There is no query form of this command available.
Syntax
:*IDN?
Parameters
There are no parameters.
Description
There is only a query form of this command available.
Query
Returns a string, containing the following information:
– manufacturer's name
– name of the device
– serial number
– software revision number
All parameters are separated by commas.
Note: In times of company mergers and acquisitions, it is a good idea to check the
name of the device, not the manufacturer's name which may change between soft-
ware updates. This does not preclude any name changes at Willtek but rather applies
to instrumentation in general.
Example
"WILLTEK, 4400, 0511099, 3.10.0001"
Syntax
:*OPC
Parameters
There are no parameters.
Description
Postpones the execution of a command until all commands issued previously have
been completed.
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