Remote Operation
Common Commands and Queries 5
5-65
5-118. Power-On Status Clear
This common command conforms to the IEEE 488.2 standard requirements.
Figure 5-11. Power On Status Clear
*PSC sets the flag controlling the clearing of defined registers at Power On.
Nrf is a decimal numeric value which, when rounded to an integer value of zero, sets the
power on clear flag false. This allows the instrument to assert SRQ at power on, providing
that the PON bit in the ESR is enabled at the time of power down, by the corresponding bit
in its Enable register (ESE).
When the value rounds to an integer value other than zero it sets the power on clear flag
true, which clears the standard event status enable and service request enable registers so
that the instrument will not assert an SRQ on power up.
Examples:
*PSC 0 or *PSC 0.173 sets the instrument to assert an SRQ at Power On.
*PSC 1 or *PSC 0.773 sets the instrument to not assert an SRQ on Power On.
Execution Errors:
None.
Power On and Reset Conditions
Not applicable.
5-119. Recall Power On Status Clear Flag
This common query conforms to the IEEE 488.2 standard requirements. The existing flag
condition will have been determined by the *PSC command.
Figure 5-12. Power On Status Clear Query
*PSC? will recall the Power On Status condition.
Response Format:
A single ASCII character is returned.
Response Decode:
The value returned identifies the state of the saved flag:
Zero indicates false. The instrument is not programmed to clear the Standard Event Status
Enable Register and Service Request Enable Register at power PO, so the instrument will
generate a “power on” SRQ, providing that the PON bit in the ESR is enabled at the time of
power-down, by the corresponding bit in its Enable register (ESE).
One indicates true. The instrument is programmed to clear the Standard Event Status
Enable Register and Service Request Enable Register at power on, so the instrument cannot
generate any SRQ at power on.
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