*OPC?

Description

This command waits for all pending operations to finish and afterwards returns a 1.

Note

The Operation pending bit in the @registersOperation is NOT set by this command. *OPC? should NOT be used for long waiting periods. Use Operation Complete Command instead!

• Query

Syntax	Response
*OPC?	1

Sample usage

• C#

var visaSession = new TcpipSocket(VISA_RESOURCENAME);
// trigger some action
visaSession.RawIO.Write("*TRIG\n");
// wait for the action to finish
visaSession.RawIO.Write("*OPC?\n");
Console.WriteLine(visaSession.RawIO.ReadString());

Output:

1

• Python

# trigger some action
visaSession.write('*TRIG\n')
# wait for the action to finish
response = visaSession.query('*OPC?\n')
print(response)

Output:

1

Related commands

*OPC