Experimental Physics and
Industrial Control System

[email protected] (Dave Gurd) · Fri, 05 Jun 1998 15:42:27 -0600

	Color rules are of course a religious topic - one to avoid at meal times.
Matthias is right about general process control practice, but Rolland seems
to have used the "green screen" practice:  when all is operating normally
the operator sees only green.  It is then easy to spot any blotch of red to
indicate something is not in normal operating mode.  I believe that this is
the intended approach for APT.  Thus, for example, an isolation valve is
green when open, but a roughing valve would be green when closed.  Carried
to its logical conclusion, this can mean that the color rule for a given
device is dependent upon the operating mode .
	As I mentioned earlier, this is all largely religious.  I adhere to
Rolland's religion.  (But I don't practice much.)

Dave


Dave Gurd
Deputy Group Leader, Controls and Automation

LANSCE - 8, MS H820 
LANSCE Division
Los Alamos National Laboratory
Los Alamos, NM, 87545

Ph:  	(505) 665-6128
Fax: 	(505) 665-5107
email:  	[email protected]
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System