Re: [foxboro] CALCA / Foxdraw / BAD I/O Graphic Question
- From: dirk.pauwels@xxxxxxxxxx
- To: foxboro@xxxxxxxxxxxxx
- Date: Thu, 6 Oct 2011 16:50:35 +0200
Use Gdev's, No need for Calc blocks, no need to invent the wheel
again...... We've been using them form the start, but configured for PLB
use. One block gives you the control over the valve and complete status
feedback (STAIND), also has nice features for interlocking etc....
Couldn't live without them.....
Kind regards
Dirk
"SLADE Jason -NANTICOKE" <jason.slade@xxxxxxx>
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04/10/2011 15:52
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[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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