Experimental Physics and
Industrial Control System

Both the database and the sequencer have good support for
periodic scheduling (scan field resp. delay() routine).
But I now have a need for scheduling things at certain times,
for example "at 00:15 and then every 6 hours",
meaning: run at 00:15, 06:15, 12:15 and 18:15 each day.

Of course 'cron' (crontab) allows scheduling of that exact type,
and running 'caput' in a cron job to trigger what I want to happen
on the IOC would be a hack towards that functionality.
But I'd prefer this all to be contained on the IOC,
and configurable via PVs, so that operators can change it
from the usual operator screens and won't have to get into
the business of editing crontabs.

Has anybody done something like this?
PVs for configuring the time, plus sequencer code
for determining the next runtime etc.?

Thanks,
-Kay

Replies:

Re: cron-type scheduling in database or sequencer? Andrew Johnson

Re: cron-type scheduling in database or sequencer? Maren Purves

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