Experimental Physics and
Industrial Control System

GAGET Alexis via Tech-talk <tech-talk at aps.anl.gov> · Fri, 27 Nov 2020 14:14:19 +0000

BEAST installation is quite complicated but I know that Kay Kasemir (I think) is working on a new version based on Kafka, maybe he can tell you more about it.

1/ Yes the field VAL (the default value) will be at 0 but the field SEVR will have the value you are looking for.

>caget PV1
>0
>caget PV1.SEVR
> NO_ALARM

You can use PV1.SEVR in the "PV name" in CSS. Also most of the widget can natively handled the SEVR field, "alarm sensitive" option have to be checked.

2/ No it means that the field SEVR will take the maximum level of severity of the different input

record(calc, "PV1") {
     field(DESC, "global alarm severity")
     field(CALC, "0")
     field(INPA, "PV2.SEVR CPP MS")
     field(INPB, "PV3.SEVR CPP MS")
}
i.e. :
PV2.SEVR= NO_ALARM
PV3.SEVR= NO_ALARM
---> PV1.SEVR= NO_ALARM

PV2.SEVR= MINOR
PV3.SEVR= NO_ALARM
---> PV1.SEVR= MINOR

PV2.SEVR= MINOR
PV3.SEVR= MAJOR
---> PV1.SEVR= MAJOR

If you need more level than NO_ALARM, MINOR, MAJOR, you can use as you said the CALC  record as a simple logical expression, but you will lose the Alarm functionnality in CSS.

Cheers

Alexis

________________________________________
De : Donny Domagoj Cosic [Donny.Domagoj.Cosic at irb.hr]
Envoyé : vendredi 27 novembre 2020 14:14
À : GAGET Alexis
Cc : tech-talk at aps.anl.gov
Objet : RE:Alarm indicator in CSS

Hi Alexis,

Thank you for your response. I am not using BEAST because I was not able
to get it to work correctly (is there any tutorial or information on how
to set it up?)
I tried your approach and it is a very good idea, thank you. Could you
just clarify a few things for me.

1. With the CALC field set to "0" isnt the output always "0"? Should the
CALC field be a logical expression with an OR between all inputs?
2. You use the MS field which I am guessing only signals when a MAJOR
alarm is triggered. Is it possible to get an output for any value of
SEVR except NO_ALARM?

Thank you once again,

---
Donny Domagoj Cosic
  Institut Ruđer Bošković, Bijenička cesta 54, 10000 Zagreb, Croatia

Dana 27.11.2020 10:28, GAGET Alexis je napisao(la):
> Hi Donny,
> Are you using an alarm server (BEAST) or just using a simple LED in CSS
> ?
> In Beast I think you have the possibility to agregate the alarm
> easily. Expert will answer you better than m.
>
> Otherwise a way to do it with the database record:
>
> record(calc, "$(MyMarvelousPV):Defects") {
>     field(DESC, "global alarm severity")
>     field(CALC, "0")
>     field(INPA, "C2TS:COND:DefectsSecuBox1.SEVR CPP MS")
>     field(INPB, "C2TS:COND:DefectsSecuBox2.SEVR CPP MS")
>     field(INPC, "C2TS:COND:DefectsTemp.SEVR     CPP MS")
>     field(INPD, "C2TS:COND:DefectsVac.SEVR      CPP MS")
>     field(INPE, "C2TS:COND:DefectsRFPow.SEVR    CPP MS")
>     field(INPF, "C2TS:COND:DefectsRFSrc.SEVR    CPP MS")
>     field(INPG, "C2TS:COND:DefectsPUPM.SEVR     CPP MS")
> }
>
> The MS field (for Maximize Severityà means that my PV
> $(MyMarvelousPV):Defects will have the field SEVR (severity) of the
> higher severity of my inputs.
>
> After that you can display easily your $(MyMarvelousPV):Defects in CSS.
>
> cheers,
>
> Alexis GAGET
> CEA Saclay - DRF/Irfu/DIS/LDISC
> alexis.gaget at cea.fr
> ________________________________________
> De : Tech-talk [tech-talk-bounces at aps.anl.gov] de la part de Donny
> Domagoj Cosic via Tech-talk [tech-talk at aps.anl.gov]
> Envoyé : vendredi 27 novembre 2020 08:43
> À : tech-talk at aps.anl.gov
> Objet : Alarm indicator in CSS
>
> Hello,
>
> I am still relatively new to EPICS, but I am slowly building up the
> system in our lab. In many of the presentations about EPICS I see a
> nice
> alarm panel with LED displays that turn on when an alarm is raised. I
> have been trying to implement this but I am having some difficulties.
>
> I set alarm levels in my IOC for various sub systems such as radiation,
> vacuum etc. and now I would like to have a general indicator in CSS
> that
> will indicate an alarm has been raised in any of these sub systems. So,
> for example, if any of the radiation probes trigger an alarm, a general
> indicator will signal this to the user as an LED in CSS.
>
> Is there any tutorials on how I would implement such a indicator or
> would you be able to provide me with a overview on how to implement it?
>
> Thank you,
>
> --
> Donny Domagoj Cosic
>   Institut Ruđer Bošković, Bijenička cesta 54, 10000 Zagreb, Croatia

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System