[foxboro] FBM communication error

Hi list,

we encountered the following problem. 
A FBM01 stopped communicating with its host cp. The message in the error log 
was saying "PIO Bus Access Error on A & B".
So, we replaced the FBM and everything was fine like before. 
After that i took the supposedly broken FBM and have put it into a test rack 
and what a surprise sysmon was happy with it.
Any ideas what could have caused those communication problems despite of the 
fact that FBM has no hardware failure.

Best Regards    

Rocco Penndorf
Process Control Engineer / Acrylic Acid Plant
DOW - Boehlen
Tel.: +49 (0) 34206-8-7524
Fax: +49 (0) 34206-8-7522
E-Mail: rppenndorf@xxxxxxx


 
 
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