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Subject: BEAST: Show alarms and acknowledge in to 2 different PCs
From: Giovanni Savarese <giovanni.savarese@lnl.infn.it>
To: tech-talk@aps.anl.gov
Date: Fri, 19 Oct 2018 11:03:48 +0200
Hello everybody,

I've recently developed an alarm structure for the BEAST Alarm System on CSS and it correctly works; I see all the PVs inserted in the database and I can acknowledge them. The problem is the following:

I have 2 different PCs; in the first one I want to show, in the Alarm Tree Panel and in the Alarm Area Panel, all the PVs belonging to the root, in the other one I want to show only a subgroup of all the PVs belonging to the same root.

How can I do it?

I tried 2 approaches but neither of them work properly:

1-Keeping the same root I can't hide in one PC the PVs I don't want to show.

2-I create 2 different roots, and they points to the same PVs. In this way I select which PVs one root can see and which not. The problem with this configuration is that if I acknowledge one PV in one root, the other root can't see that PV's acknowledge.

After this last approach I also tried to look at the database's construction and I saw that it effectively create 2 PV elements in the database with a different parent, in fact each element can have at most one parent, and thought they receive updates from the same PV status, the acknowledge is done only at database level.

If you have suggestions about a third approach or a correction to one of the previous ones it will be very helpful.

Thanks,
Giovanni

--
******************************
Giovanni Savarese
INFN - Laboratori Nazionali di Legnaro
Viale dell'Universita', 2
35020 LEGNARO (PD) - ITALY
Phone: +39 0498068439
email: giovanni.savarese@lnl.infn.it
******************************


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