communication failure

[Duffy2007]

Hi Yves,

please report me your results and tell me if i can help you.

[Yves]

Hi

I don't get it. 

The 33162 errors occurs quite randomly. But hardly ever they last for about 5 to 6 seconds. 

Now I'm looking to monitor network traffic and cpu load.

Maybe...

[Duffy2007]

Hi Yves,

can you post some code for me so i can look into it?

What are the results, how looks your network traffic?

Thanks

[Yves]

Hi Alex

Thank you very much for your support.

I might have found the error: In a small subvi I found a while loop running without any timer... (And because I load some vi's dynamically and reentrant there were more than one.)

In fact I would have expected  a rise of cpu load du to this but there was none.(Maybe due to the quite short time the while loop was running.)

Up to now I had no communication error for 8 hours. 

Well I found it quite odd that the error message lead me to a communication failure...

Yves

[Yves]

Hmmm, thought I had the error. But I wasn't lucky.

I have set a  "Get/Time in seconds" in the acquisition loop. And I compare the elapsed time between every cycle.

And now I have seen that this loops isn't running fast enough from time to time. Sometimes it take more than 5 second!

Although I have set this loop on high priority.

How can I check where this problem comes from?

Yves

[Duffy2007]

Hi Yves,

how looks the CPU in the task manager.

Can you please post some code so i can look into it?

How fast should the loop run?

Are you using Timed Loops on your windows system to get the values back from the cFP-1808?

[Yves · Accepted solution]

Hi Alex

I just wanted to thank you and all the others for having tried to solve my problem.

It sounds really incredible.

By great luck we found out what the problem was: Our lab consists of 10 "Fieldpoint-station". In one of those station was a water leak which drops on the 24VDC power supply for the FP-Controller. From time to time, of course.... Murphy

The water drops came from a pneumatic valve block right above the power supply.

Due to the water drops the power supply stopped and started again. And of course the FP-Controller had to start again to. Unfortunately this problem occured on various time and couldn't be tracked very easely.

Yves

[Duffy2007]

Hi Yves,

thanks for this information i think that was realy Murpy 🙂