Experimental Physics and
Industrial Control System

Sue Witherspoon <[email protected]> · Wed, 05 Jan 2000 14:09:14 -0500

William Lupton wrote:
> 
> Janet Anderson wrote:
> >Maybe we could allow the operator to enable/disable force pvs.
> >We could add a ForcePV Button to each alarm group or channel line
> >for which a Force PV is defined ( similar to the Guidance and Related
> >Process buttons). Pressing this button would bring up the ForcePV Dialog
> >window which allows the operator to view/change the ForcePV settings.
> >This dialog could be modified to allow the operator to enable/disable
> >the ForcePV.  The color of the button could also indicate the enabled/disabled
> >status.
> 
> That sounds good. My only reservation is that this forces the concept of
> FORCEPV to be visible to the operator, whereas, as I understand it, FORCEPV
> is intended to be a hidden mechanism which "magically" avoids alarms when
> other aspects of the system state indicate that the alarm is not real.
> 
> Do people have objections to my two proposals of yesterday, namely
> 
> a) allow the FORCEPV reset mask to honor any operator overrides,
> 
> b) allow the FORCEPV logic to check for transitions to the force or
>    reset values
> 
> >From my point of view, these seem to address the problem at source. Really,
> I think you could almost view them as bug fixes.

I tend to agree with William L.  Especially, the concept part. With Janet's
proposal the operator's would be required to do two things in my scenario:
    1. Know that the alarm was effected by a FORCEPV mask and disable it, then
    2. Override the alarm as before. 

It's too bad that the  set/reset part of the FORCEPV clears the entire mask not
just the part that the definition called for.

______________________________________________________________
Sue D. Witherspoon                      TJNAF - CEBA 
[email protected]                        (757) 269-7579 
If my people would Humble, Pray, Seek and Turn....2 Chron. 7:14

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System