GPIB/usb connection loss and OVP freeze

[eugeniap]

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

[nyc_(is_out_of_here)]

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@eugeniap wrote:

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

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Windows will turn off power to USB ports to "save power". You need to disable this.

After working 4 months with USB-GPIB adapters, if I had the choice, I would never use them.

[eugeniap]

Thanks for the response.

I've already disabled the usb power saving in the power settings. 

Any other ideas?

E

[Albert.Geven]

Check also the advanced settings, windows looks very energy concerned

[eugeniap]

Hi I have also checked this and everything seems to be disabled with the usb power settings.

I find it strange that it can work for 8 hours + with no error, but then can randomly fault.

[hadarszostak]

Hi
I'am dealing with the same problem with spectrum analyzer.

Can you share with me a solution if you found one ?

Even discribing the exact problem will be helpful

Realy appreciate your help.

HS

[nicolasp5186]

Hello,

I experience the same issue.

I have a bench with differents instruments and it freeze like you said, after 5 min, 1h, 8h...

The probleme is time and instrument random.

I am connected by a gateway.

I don't have the solution yet.

[hadarszostak]

Hi
The solution was simple. I used the NI GPIB-USB-HS adapter. Searched online and found that it's a very common problem with this adaptor.

So I switched to agilent adaptor and it solved my problem.
The agilent adaptor works by default only with agilent software products, there is a guide online that show how to use the agilent with all softwares.

Try to use another agilent adapter. The same product, maybe your adaptor is not working well.

HS

[hadarszostak]

Adaptor* sorry for that