[foxboro] IND Block error

Ok, I was surprised by a block error yesterday on a ind block (46IND5325). 
Basically the code loops through a sequence of checks and events and during one 
check it will send the following command IF a certain condition exists.
:46AW03DMCMD := "dmcmd /OPT/MENUS/46AREA/PAPER_MACHINE/BROKE.FDF";

Normally the command will pull up a display (BROKE.FDF) on Foxview 46AW03. Here 
is where the catch comes into play. The station(46AW03) had a hardware problem 
and was not powered up or on the mesh and caused the seq block to go to manual. 
Since the MA parameter is set to "MA = :46IND5325.MA.1" The block would kick 
back into auto and fail again, etc....

So my question to all is how would you handle the block so it doesn't fail just 
because a workstation is not alive? Error handling routine? IF/Then check? Some 
other means? I was very surprised that the block knew the station was not 
reachable and the ind block went to manual!
Ronald G. Schafer
Distributed Controls System Administrator
White Birch Paper Company
Bear Island L.L.C. Division
10026 Old Ridge Road
Ashland VA, 23005
Phone 804-227-4034
Fax 804-227-4052
Email: rschafer@xxxxxxxxxxxxxxxxxxxxxx<mailto:rschafer@xxxxxxxxxxxxxxxxxxxxxx>


 
 
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