Clearing Registers And Queues - Keithley 7999-6 Instruction Manual

3-16 Operation

Clearing registers and queues

When the relay unit is powered up, the bits of all registers in the status structure are clear
(set to 0) and the two queues are empty. Commands to reset the event and event enable regis-
ters, and the error queue are listed in Table 3-3. In addition to these commands, any enable reg-
ister can be reset by sending the 0 parameter value with the individual command to program the
register.
NOTE *RST has no effect on status structure registers and queues. See "Queues" for
details on the error queue.
Table 3-3
Common and SCPI commands — reset registers and clear queues
Commands
To reset Standard
event register:
*ESE 0
or
*CLS
To clear error queue:
*CLS
STATus
:QUEue
{:NEXT}?
:CLEar
SYSTem
:ERRor?
:CLEar
Notes:
1. The standard event enable register is not reset by STATus:PRESet (see "Status byte and service request
commands").
2. STATus:PRESet has no effect on the error queue.
3. Use either of the two :CLEar commands to clear the error queue.
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Description
Reset all bits of the Standard Event Register to 0.
Clear all messages from error queue
STATus subsystem:
Error queue:
Read and clear the oldest error/status message.
Clear all messages from error queue.
SYSTem subsystem:
Read and clear the oldest error/status message.
Clear all messages from error queue.
Ref
Note 1
Note 1
Note 2
Note 2