[foxboro] STATE block - resolution

STATE block - resolution
I have placed an $ST0 at the end of each of my display commands that 
changes a bit in STATxx.  The $ST0 recalls the display thus forcing an 
update.  This workaround is quite sufficient for my application.  Thanks 
to Sean Redmond for the suggestion.

Thanks also to Alex Johnson for the detailed clarification of the 
parameter tables in the control block documentation.

Greg Hurwitt
BASF Freeport


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(I/A Version 8.2, Foxdraw Version 10.0.2)
I am developing a small application that will be using a STATE block. 
There will be a graphic that allows the Operations Engineer to change bits 

in the STATxx (state pattern) parameters.  Unfortunately, when reading 
these parameters back to the graphic, the displayed bits do not update 
unless the graphic is reloaded.

I imagine many of you have not worked with STATE blocks, however, you may 
have seen the identical behavior with the Mxx (memory) parameters of a 
CALCA block.  The displayed information does not update when the value 
changes; when the display is reloaded then the current value is displayed 
properly.  For both the STATE.STATxx and CALCA.Mxx parameters, this 
behavior is observed on both user-generated graphics and the default block 

detail display 

These are parameters that in many applications might not be updating 
frequently (as opposed to say the .PNT of an AIN block), so I can kind of 
see why they behave differently from other parameters.  But I've never 
seen anything in the documentation that labels these somehow as "static" 
parameters not subject to display updates.  Have I missed something in the 

docs? 

More importantly, is there a way to configure my FoxDraw graphic to force 
the display of these parameters to update on change or on say an 
every-5-second basis?


Greg Hurwitt 
E-Mail:  gregory.hurwitt@xxxxxxxx
BASF Corporation
Freeport, TX 77541


 
 


 
 
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