Re: [foxboro] CALCA / Foxdraw / BAD I/O Graphic Question
- From: "Lowell, Timothy" <Timothy.Lowell@xxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 4 Oct 2011 09:29:21 -0500
Jason,
How are you testing the BAD bit in your CINs? A CIN will almost never show BAD.
If the FBM exists and the ECB is good, it will just sit there looking good even
if no wires are connected. To make it "bad" in a test environment, you would
probably have to delete the ECB, and even then it will show Out Of Service
rather than BAD. It's not like an AIN that shows bad if no wires are attached.
Tim Lowell
Tesoro | 210-439-5914 (cell)
On Oct 4, 2011, at 8:52 AM, "SLADE Jason -NANTICOKE" <jason.slade@xxxxxxx>
wrote:
> 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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