I'm running multiple keithley 2410 power supplies using the agilent GPIB/USB 82357B interface.
The power supplies are read continuosly and then set when needed to a new value.
The power supplies keep randomly loosing connection and can no longer be communicated with at all. If this happens for one of the supplies then the others also stop communication. The only solution is to stop the vi, turn off the power supplies and unplug the usb then plug back in and turn power supplies back on. But this is very time consuming when you are dealing with a very limited time to take data.
They can sometimes run for hours without any fault and then will just drop the connection. Sometimes it will run for only 5 minutes.
I've also experience an OVP GPIB freeze up which I have found is probably due to a need for a firmware update. Has anyone found a work around for this(appart from the firmware update)?
Thanks in advance,
E