Common Commands 9-3
Command notes (IEEE-488.2 common commands and queries)
*IDN? — identification query Reads identification code
The identification code includes the manufacturer, model number, serial number, and firm-
ware revision levels as follows:
KEITHLEY INSTRUMENTS INC., MODEL 2306,
xxxxxxx, yyyyy/zzzzz
KEITHLEY INSTRUMENTS INC., MODEL
2306-PJ, xxxxxxx, yyyyy/zzzzz
KEITHLEY INSTRUMENTS INC., MODEL 2306-VS,
xxxxxxx, yyyyy/zzzzz
Where: xxxxxxx is the serial number.
yyyyy/zzzzz is the firmware revision levels of the digital board and display board
RO
Ms.
*OPC — operation complete Sets OPC bit
*OPC? — operation complete query
Places a “1” in output queue
When *OPC is sent, the OPC bit in the standard event register will set after all pending com-
mand operations are complete. When *OPC? is sent, an ASCII “1” is placed in the output queue
after all
pending command operations are complete.
Typically, either one of these commands is sent after a
reading or reading array is requested.
While the instrument is acquiring readings, all commands (except DCL, SDC, IFC, *TRG and
GET) that are sent are not executed.
After all readings are acquired, the instrument returns to
the idle at which time all pending
commands (including *OPC and/or *OPC?) are executed.
Syntax
— The following syntax rules explain how to use *OPC and *OPC? with other
commands (refer to Table 9-2 on page 9-4 for examples). *OPC and *OPC? can be used in
conjuction with battery channel (#1) commands or char
ger channel (#2) commands (see
Table 9-2).
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