Re: [foxboro] FoxCom questions
- From: "Badura, Tom" <tbadura@xxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Mon, 25 Mar 2013 09:21:15 -0500
Quay,
OSV (Output Span Variance) is a function of the AIN (or RIN) block and
defines the range in percent of span above or below the output limits
where the output is clamped. It functions the same regardless of the
source of the AIN input signal. While the ECB for a Foxcom instrument
will read the full range available, the AIN will clamp based its
configured range. A variety of options (ORAO, BADOPT, LASTGV) define
how the AIN block will respond to this condition. See the AIN block
description in B0193AX for a complete discussion. Note that Out of
Range, Error and Communication Status options and bits are also
available in the ECB - see also the ECB18 (IT2) description.
Tom Badura
Plastics Engineering Company
tbadura@xxxxxxxxxx
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Quay B. Finefrock
Sent: Wednesday, March 20, 2013 7:42 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] FoxCom questions
All,
I believe that I understand how to set OSV and the Fail High/Low setting
on NAMUR NE 43 instruments to generate an alarm on instrument failure
but avoid alarming when the instrument is in normal over/under range.
However, I am not sure how OSV applies if the instrument is
communicating via FoxCom.
Does the OSV setting still apply? Is it the same as if the instrument
is communicating via 4-20mA analog signal?
Is transmitter failure otherwise communicated through FoxCom? If so,
how/where is it flagged in the system?
Regards,
Quay
Quay B. Finefrock
Singapore Phone: +65 9 327 2923
Brunei Phone: +673 883 1480
Philippines Phone: +63 921 400 2886
Malaysia Phone: +60 17 820 6900
Email: qbfinefrock@xxxxxxxxx
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