Re: [foxboro] FBM01 weirdness

Hi Corey,
I would expect the meas to fail if the I/O channel is not working 
correctly. I would suggest connecting an Amps simulator and see if the 
meas reacts to the amps you're sending (4-20). Or you could try to connect 
the AIN to another I/O with a temp wiring and see what happens. If it's 
still the same the problem is in the AIN block somewhere. If not replace 
the FBM01.

We have several FBM01/04 where 1 channel is not working anymore, but 
usually the meas value freezes and does not respond to Amp simulation.

Rgds,

Dirk Pauwels - DCS/MOC coordinator 
Engineering dept.
Hexion Specialty Chemicals
E mail: dirk.pauwels@xxxxxxxxxx
T.  +32.(0)3.570.95.97
F.  +32.(0)3.570.16.09
Mob. +32.(0)497.428.300



Corey R Clingo <corey.clingo@xxxxxxxx> 
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09/07/2009 10:49
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[foxboro] FBM01 weirdness






Hi list,

We came across something weird with an FBM01 yesterday.  On one point, the 

counts (MEAS) value is valid and moving (around 44000), but the PNT value 
is BAD, red and frozen.  Other points on the card are working fine.


We are assuming we have a bad channel.  The AIN block is fine, in auto, 
SCI=3, ranges good, etc.  LASTGV=1 (I _hate_ that default :) so I don't 
know what the value would have gone to if it were left as nature intended. 

 We deleted/undeleted the block, no luck.


Anyone else seen this?


Corey Clingo
BASF Corp.

 
 
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