Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Thu, 20 Oct 2005 17:52:29 +0200

The current plan (afaik) is to allow even more user-defined "triggers".

Or "filters". Or "events". (Everyone of us has different interpretations

of those terms...)

Your last mentioned subscription won't be enough, as e.g. the Alarm

Hander is also interested in the value, but only wants updates when the

severity changes.

The trigger/events and channels/fields/views aspects of a connection are

orthogonal.

Ralph

Kay-Uwe Kasemir wrote:

Hi:

While still wondering if properties of a channel
or fields of a record need to be configured as
"commands", "static", ...

What about the status/severity and alarm subscriptions?
An alarm handler is interested in updates whenever
the severity of a channel changes.

Is a separate 'alarm' subscription as it's now
available in CA V3 required, or would a 'change' subscription
to the 'status' and 'severity' properties of a channel
cover what an alarm handler needs?

Thanks,
-Kay

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System