AMETEK PLA-PLW Programming Manual User Manual
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Operation Complete Output Query. This query causes the electronic load to place an ASCII "1" in
the Output Queue when all pending operations are completed. Pending operations are complete
when:
Ϯ All
commands that were issued before an *OPC command have been executed.
Ϯ Any
change in the input level caused by these previous commands has been
completed. (Effects of slew time have been accounted for.)
Ϯ No pending trigger level operations are set for the single electronic load or for any
channel of the multiple electronic load.
Unlike *OPC, *OPC? prevents processing of all subsequent commands. When all pending operations
are completed, an ASCII "1" is placed in the Output Queue. *OPC? is intended to be used at the end
of a command line so that the program can then monitor the bus for data until it receives the "1" from
the Output Queue.
Command Syntax
*OPC?
Returned Parameters
has completed all pending operations.
*PSC
Power-on Status Clear Command/Query. Type Device Initialization Description This command
controls the automatic clearing at power turn-on of:
Ϯ The
Service Request Enable register.
Ϯ The
Standard Event Status Enable register.
If the command parameter = 0, then the electronic load can be programmed to request service at turn
on. Any non-zero parameter causes both registers to be cleared at turn on, preventing the electronic
load from being capable of requesting service at this time.
Command Syntax
*PSC
Parameters
0 or not zero
Suffix
None
Query Syntax
*PSC?
Returned Parameters
0 = power-on clear flag is false; affected registers not cleared
at turn on.
1
=
power-on clear flag is true; affected registers cleared at
turn on.
Suffix
None
*RCL
Recall Instrument State Command. This command restores the electronic load to a state that was
previously stored in memory with a *SAV command to the specified location (see *SAV). *RCL also
does the following:
At power turn-on, the equivalent of an *RCL 0 is executed to restore the electronic load to the state
stored in location 0. The same state is also set if the *RCL command is directed to a location where
no state was stored since the last time power was cycled.
Note *RCL does not affect any Status Enable registers or Transition Filters.
Command Syntax
*RCL
Parameters
0 through 3