Experimental Physics and
Industrial Control System

>> 2)  What color convention are you using ?

>As BESSY is an accelerator facility, the  that are monitored separate
>different sections of the vacuum chamber. Closed valves block the beam, so
>they are displayed red.

In process controls the red valves indicates closed and green open. You might want to use 
(and argue about) another color for the state inbetween (analog valves) - we use blue -.

Matthias

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