Timeout expired before operation completed

[sweetyyo1]

Hi,

I am using Keithley 2400 and sourcing voltage sweep (from -0.8V to 0.8V, step=0.01V) and read the current.

However, the operation is always stopped in the middle when I used small step.

If I increased the step voltage to 0.05V which allowed shorter sweep time, then it finishes the operation.

There seem to be a limit of maximum readings that Keithley 2400 can do in limited time.

I increased the byte count in the GPIB read to a larger number, but it didn't work out.

How can I resolve the issue?

Attached is my VI.

[JÞB · Accepted solution]

Increase the timeout value.  Just insert a proper node on the VISA Resource wire and select the timeout

Property.   By default the setting is 60000msec (1 minute) if you can calculate the amount of time the sweep will take you can set the timeout to something just larger.

Another, even better, option with GPIB is to configure the instrument to set the Operation Complete flag in the status byte and poll *OPC? then Read the record. 

[Gregory · Accepted solution]

It looks like the default timeout is 10,000 ms (10 sec). If you need a longer timeout than that, you should wire it to "GPIB Read".

[sweetyyo1]

Thanks for the info!

[sweetyyo1]

Thanks. It works out!