Re: record that processes at a given time of day?

[James Larsson <larsson@triumf.ca>]

Good Day,

I tend to avoid cron job on the control system since I don't know that it is *guaranteed* to run, and at specified time - though it usually does.  Even though crontab is a great tool, it isn't a control system tool, so my preference is to avoid it (except for say, booting a control system).

I implemented a calc record that uses inputs from the devIocStats (synapps) to get the second, minute, and hour, and compare them with your desired values and make the Val=1 if equal, which is essentially what you want.  If you connect that to the SDIS of a fanout and process the fanout every 1/2 second then you will get a single process signal output, at the time of day you specify (because usually it's disabled).

You can do the same thing but only use seconds, and minutes for something that happens every hour, and likewise for month and day.  Sometimes I want to process a record, but only once every 10 minutes.

Cheers

James Larsson

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From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of Maren Purves <m.purves@eaobservatory.org>
Sent: November 5, 2018 10:14:07 AM
To: Michael Westfall
Cc: tech-talk@aps.anl.gov Talk
Subject: Re: record that processes at a given time of day?

 

Hi Michael,

I have a cron job that runs once a day that resets the value of several records by

running cau (with an input file). If you don't find a record that can be made to do

that I'm sure you can adapt the cron job idea.

Maren Purves, EAO/JCMT

On Mon, Nov 5, 2018 at 7:37 AM, Michael Westfall via Tech-talk <tech-talk@aps.anl.gov> wrote:

Hi,

I'm wondering if someone has an EPICS record implemented that processes at a given time of day, like an alarm clock.

I don't see anything like that in EPICS base.

--

Mike Westfall

Control Systems Software Engineer