IEEE-488.2 Common Commands 13
Keysight U2722A/U2723A Programmer’s Reference 119
*OPC/OPC?
Syntax
*OPC
The command is mainly used for program synchronization. It causes the
instrument to set the OPC bit (bit 0) of the Standard Event Status register when
the instrument has completed all pending operation sent before the *OPC
command.
*OPC?
This query returns “1” to the output buffer at the completion of the current
operation. *OPC? command does not suspend processing of commands.
Remarks
Pending operation have completed when:
– all commands sent before *OPC, including paralleled commands, have
completed. Most commands are sequential and will be completed before the
next command is executed. Commands that affect the output voltage, current,
or state, relays, and trigger actions are executed in parallel with subsequent
commands. *OPC provides notification for the completion of the parallel
commands
– all triggered actions have completed
*OPC does not prevent processing of subsequent commands, however, the OPC
bit will not be set until all pending operation have completed.
Returned Query Format
<NR1>
The command returns “1” to the output buffer.
See Also
*ESE/*ESE?
*ESR?
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