Re: [foxboro] GDEV mismatch alarm in one direction only
- From: "Jones, Charles R. (Chuck)" <Chuck.Jones@xxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Thu, 12 Sep 2013 09:13:16 -0400
We can simplify Doug's earlier equation.
From B0193AX:
"In the Interlock mode, unlinked MANDSR and AUTDSR parameters are
secured by the block and track the INTDSR parameter."
So, the MANDSR will be OFF whether the operator sets it that way or
INTLCK is TRUE.
And, we only want to track a mismatch if we have removed permission for
the pump to run (GDEV is OFF).
Connect IGNLM2 (the RUN feedback) to the MANDSR bit.
When the block is turned OFF--either manually or via interlock--the
feedback will be monitored.
When the block is turned ON--permission is granted to run (or not to
run) the pump--the feedback is ignored.
I wish I would have thought of this a long time ago...
Chuck Jones
Tate and Lyle
********************************************************************************************************
This email and any files transmitted with it are confidential and intended
solely for the
use of the individual or entity to whom they are addressed. If you are not the
intended
recipient or the person responsible for delivering the email to the intended
recipient, be
advised that you have received this email in error that any use, dissemination,
forwarding, printing, or copying of this email is strictly prohibited. If you
have received
this email in error please notify the sender immediately. Please note that we
reserve
the right to monitor and read any emails sent and received by the Company in
accordance with and to the extent permitted by applicable legal rules.
*********************************************************************************************************
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
foxboro mailing list: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
Other related posts:
