Re: [foxboro] External Pushbutton for acknowledge
- From: "Johnson, Alex P (IPS)" <alex.johnson@xxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 18 Nov 2008 13:52:35 -0500
Matt,
Re: Is there a simple way to use a physical input from an external
pushbutton to acknowledge a specific alarm?
To actually acknowledge the alarm, you have to reset (drive to FALSE)
the parameter UNACK of the target block. This requires a one-shot set to
the UNACK parameter.
The only ways to generate a reset of the UNACK parameter on a physical
contact change are:
1) Use an IND block to monitor the contact (WAITUNTIL) and the reset
UNACK (:C:B.P := FALSE)
2) Use a script to monitor the contact and reset the UNACK - very
inefficient.
3) Write a program to do it - double heaps of uck!
Hope this helps.
Regards,
Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (desk)
713 329 1600 (operator)
713 329 1944 (SSC Fax)
713 329 1700 (Central Fax)
alex.johnson@xxxxxxxxxxxxxxxx
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Kinsinger, Matthew R
Sent: Tuesday, November 18, 2008 11:32 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] External Pushbutton for acknowledge
Is there a simple way to use a physical input from an external
pushbutton to acknowledge a specific alarm? I know a script could do it,
or even a simple sequence block, but for one pushbutton and one block I
was hoping to avoid those two routes.
Any help is appreciated.
Matt Kinsinger
Process Control Engineer
PPG Barberton
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