*IDN? — Identification Query Read the identification code
Description
The identification code includes the manufacturer, model number, serial number, and
firmware revision levels and is sent in the following format:
KEITHLEY INSTRUMENTS INC., MODEL 2010, xxxxxxx, yyyyy/zzzzz
Where: xxxxxxx is the serial number.
yyyyy/zzzzz is the firmware revision levels of the digital board ROM and display
board ROM.
*OPC — Operation Complete Set the OPC bit in the standard event status register
after all pending commands are complete
Description
On power-up or when the *CLS or *RST is executed, the Model 2010 goes into the Operation
Complete Command Idle State (OCIS). In this state, no pending overlapped commands exist.
The Model 2010 has three overlapped commands:
• :INITiate
• :INITiate:CONTinuous ON
• *TRG
When you send the *OPC command, the Model 2010 exits from OCIS and enters the
Operation Complete Command Active State (OCAS). In OCAS, the instrument continuously
monitors the No-Operation-Pending flag. After the last pending overlapped command is
completed (No-Operation-Pending flag set to true), the Operation Complete (OPC) bit in the
Standard Event Status Register sets, and the instrument goes back into OCIS.
Note that the instrument always goes into OCAS when *OPC is executed. If no pending
command operations are present (e.g., trigger model in idle state), the Model 2010 immediately
sets the OPC bit and returns to OCIS.
When used with the :INITiate or :INITiate:CONTinuous ON command, the OPC bit of the
Standard Event Status Register will not set until the Model 2010 goes back into the idle state.
The initiate operations are not considered finished until the instrument goes into idle.
When used with the *TRG command, the OPC bit will not set until the operations associated
with the *TRG command (and the initiate command) are finished. The *TRG command is
considered to be finished when the Device Action completes or when operation stops a control
source to wait for an event (see Trigger Model in this section).
To use the *OPC exclusively with the *TRG command, first force the completion of the
initiate command so that only the *TRG command is pending. Do this by sending the :ABORt
command to place the instrument in idle, which (by definition) completes the initiate command.
Since continuous initiation is on, operation continues into the Trigger Model. After sending the
*TRG command, the OPC bit sets when the *TRG command is finished.
4-38 Remote Operation
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