Re: [foxboro] INVALM issue on a CIN block

Corey
We use the IVO paramater to invert alarms in CIN blocks.

Regards
John Illingsworth
NRG Gladstone Power Station
Gladstone QLD 4680



-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On 
Behalf Of Corey R Clingo
Sent: Friday, 22 August 2008 7:57 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] INVALM issue on a CIN block


Hi list,

Yes, I'm fishing for a quick answer before I call TAC :)


We had to change some CIN blocks today such that the alarm state was the OFF 
state on the blocks.  I set INVALM to 1 and the block detail display looked 
fine -- the OFF state of the block caused the big red STATE to come up, and the 
ON state caused the alarm to clear (well, STATE changed to UNACK).


However, when I look in the alarm history display, it appears that INVALM is 
being ignored there.  The ON state of the CIN block generates the alarm 
message, and the OFF state generates the return message -- exactly the opposite 
of what I'm seeing on the block detail.  The alarm "printer" (actually, a PC 
running Visual Alert) exhibits this same behavior.


I looked through the QFs for I/A version 6.5.3 but didn't find anything. Anyone 
ever seen anything like this before?  I'll probably delete/undelete all the 
changed CIN blocks next if I can't find some other remedy.  These blocks are in 
a CP40A.


Thanks,

Corey Clingo
BASF Corporation






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