Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Thu, 20 Oct 2005 11:34:52 +0200

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?

Cheers,
Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System