Re: [foxboro] TriconeX OVD and Voter Fault
- From: <c.a.wolfschlag@xxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Mon, 19 Jan 2009 13:42:16 -0500
OVD is output voter diagonsitics. OVD monitors the digital outputs. This
function can be turned on of off (for Tricons). We typically run with our on,
but will disable the OVD when doing partial stroke testing on valves. OVD
monitors the digital outputs. A voter fault is defined as follows "a fault
that can occur on a digital output module, if the OVD circuitry becomes
defective. Examples are an output switch stuck high or stuck low. Voter
faults on two channels of a single point may lead to loss of control."
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Johnson, Alex P (IPS)
Sent: Monday, January 19, 2009 1:14 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] TriconeX OVD and Voter Fault
Aymen,
I suggest forwarding this inquiry to IPS Customer Support Center:
GCS Americas - ips.csc@xxxxxxxxxxxxxxxx
GCS EMEA - emeatac_ips@xxxxxxxxxxxxxxxx
GCS Asia - csc.asia@xxxxxxxxxxxxxxxx
There is a Knowledge Base database that the Tech support group manages
and has responses for frequently asked questions. As it happens, your
question is one that comes up very frequently.
I'd answer it here, but I don't actually know the answer. I just know
that the Global Client Support folks do know the answer to your
question.
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 Aymen LAZAAR
Sent: Monday, January 19, 2009 8:17 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] TriconeX OVD and Voter Fault
Dear list,
Would you please advise on the actual difference between OVD and Voter
Fault. Indeed, is there an available lecture on TUV certification
recommendation on control logic implementation when it comes to safety
systems.
Thanks,
Aymen
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This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
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