Re: [foxboro] CALCA / Foxdraw / BAD I/O Graphic Question
- From: "Russ Kaiser" <russ@xxxxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 4 Oct 2011 10:29:16 -0400
Wade,
I don't know if you are getting your individual limits via an integrator or
if they are native to your Foxbor system, but
we do this type of status indication for every valve in the plant using the
bitmap option for fill color within FoxView. It also works within DM too.
No layering is involved and if the connection is bad, the valve shows up
cyan all by itself.
With multiple thousands of valves setting up a calc block for each sucks up
a lot of horsepower.
Russ
>-----Original Message-----
>From: foxboro-bounce@xxxxxxxxxxxxx
>[mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of SLADE Jason
>-NANTICOKE
>Sent: Tuesday, October 04, 2011 9:52 AM
>To: foxboro@xxxxxxxxxxxxx
>Subject: [foxboro] CALCA / Foxdraw / BAD I/O Graphic Question
>
>All knowing list,
>
>Personal experience indicates that a field device with two
>limit switches requires 5 states to provide the operator with
>clear and accurate position indication at all times.
>
>These 5 states include:
>- open
>- closed
>- neither (midstroke/travelling)
>- both (oops!)
>- "I wish I could tell you, but I haven't got a flippin' clue"
>(FBM / FCM / PIO bus communication errors = CYAN)
>
>Using a CALCA block to convert the Boolean INs to mapped bits
>in Long Integer 1 (LO01) to drive a single bit-mapped graphic
>element (because layered graphics will lie like a rug), I'm
>having a problem coming up with a solution to the last state.
>For some unknown reason, steps 10 and beyond of the following
>logic example (or the graphic config) misses the mark. Either
>way, the graphic element won't turn cyan:
>
>BI01 = :NSO.CIN
>BI02 = :NSC.CIN
>
>STEP 1 - IN BI01
>STEP 2 - OUT O01 ; BIT 1 OF LO01 ENABLES OPEN INDICATION
>COLOUR STEP 3 - ; STEP 4 - IN BI02 STEP 5 - OUT O02 ; BIT 2 OF
>LO01 ENABLES CLOSED INDICATION COLOUR STEP 6 - ; STEP 7 - AND
>2 STEP 8 - OUT O03 ; BIT 3 OF LO01 ENABLES LIMIT FAULT
>INDICATION COLOUR AND FLASHING
>STEP 9 - ; WITH ALL 3 OF THESE BITS SET TO 0, THE GRAPHIC
>ELEMENT IS SET TO MID-STROKE COLOUR
>STEP 10- RBD BI01
>STEP 11- RBD BI02
>STEP 12- OR 2
>STEP 13- BIF 16 ; NEITHER INPUT BAD, CLEAR BAD FLAG
>STEP 14- SBD LO01 ; INPUT(S) BAD, SET BAD FLAG STEP 15- GTO 17
>STEP 16- CBD LO01 STEP 17- ; STEP 18- END
>
>What am I missing here?
>
>In advance, thanks.
>
>Jason Slade
>
>Control Technologist
>Protection & Control Systems Support
>OPG / Nanticoke GS
>
>
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