Experimental Physics and
Industrial Control System

Maren Purves <[email protected]> · Wed, 27 Oct 1999 12:01:16 -1000

Ned Arnold wrote:
> > Has anyone created a record or simple pattern of records that acts as a
> > watchdog?  In other words, one that will give a signal if a response does
> > not come back from a hardware device within a setable time period.
> 
[snipped details]

> This can be used to determine in the database if a particular client is running.
> The client simply writes a value to $(S):imageBusy.VAL periodically or the
> database assumes its not active.

and if you need this "automated" you can set LOW and LOLO values,
run an alarm handler and send people email ... (we do our cryostat
temperatures that way)

Maren

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System