14.2.14 *OPC
The Operation Complete Command allows for synchronization between a controller and several devices.
It causes the instrument to set the Operation Complete Command -OPC- bit in the Standard Event
Status Register to be set true when all selected pending operations have been finished. This implies that
all device operations initiated by previous programming commands have been entirely completed or
aborted.
Example:
Send —-> MEAS:VOLT?
Send —-> *OPC
The timing diagram related to the internal execution of these commands is shown in the following figure:
There are two methods of synchronization between application programs and the PSC-488:
• Use the OPC event bit to generate a Service Request. During the instrument operation, the
application program can perform other tasks if the Service Request is used as interrupt.
• Read the *OPC bit (bit 0) from the standard event register using the common query *ESR?.
Wait until the OPC bit becomes set to true.
*OPC?
The Operation Complete Query is a method for synchronization. The Operation Complete Query places
an ASCII character"1" in the device Output Queue when all pending operations have been finished.
14.2.15 *RST
The *RST command resets the device dependent functions except for memorized configuration settings,
protected settings and calibration data.
Voltage 0 V
Current 0 A
Output Disable
RSD off
REM on
REM CV on
REM CC on
Front
panel
Unlock
page 23 MANUAL May 2008
DELTA ELEKTRONIKA BV PSC SERIES
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