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Subject: Re: V4 DB RecordCommon: Suggestion for alarmAckTransient (ACKT replacement)
From: Marty Kraimer <[email protected]>
To: EPICS Core Talk <[email protected]>
Date: Thu, 20 Oct 2005 07:11:06 -0500
Ralph Lange wrote:

The following just became obvious in BESSY real life:

There are channels where the attached hardware latches the error status. The operator has to actively "error reset" the device to make the error bits go back to green. In such cases, you don't want to have to acknowledge those alarms additionally in the Alarm Handler. So we set ACKT to false for such error bits. BUT: In cases of transiently failing connections (such as loose field bus plugs or short hangup states followed by quick reboots of the remote hardware) we are losing this failure information because also the resulting transient INVALID status doesn't need to be acknowledged.

Suggestion:
Change the type of alarmAckTransient from boolean to menu(menuAlarmSevr) and redefine it as "highest level of alarm that does not have to be acknowledged". Doesn't need more space in the DB and allows for nice and subtle configuration options: e.g. warnings that don't have to be ack'ed while errors do.

What do you think?


Sounds fine to me. I will change RecordCommon.wiki to

        field(alarmAckTransient,menu(menuAlarmSevr)) {
        # highest level of alarm that does not have to be acknowledged"
        }

If there are objections it can always be changed back.

Marty

Cheers,
Ralph



Replies:
Re: V4 DB RecordCommon: Suggestion for alarmAckTransient (ACKT replacement) Ralph Lange
References:
V4 DB RecordCommon: Suggestion for alarmAckTransient (ACKT replacement) Ralph Lange

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