Hi:
> On Mar 31, 2017, at 10:47 AM, Miguel <[email protected]> wrote:
> I have a PV that is an integral over the day. I would like at the end of the day(certain timestamp) to store it to the DB (maybe in another PV) and after that reset the integral.
Not sure about a more elegant solution, but what I’ve done to trigger processing of records at a certain time, for example “10 seconds after midnight” on each day was using a sequence. In C code you can get the current time of day in the local time zone, and determine how long you’d have to sleep until some specific time. A sequence can ‘delay()’ that long and then write to some PV which triggers what you want to happen, or post an EPICS event and then have records process on the event.
You can also call similar C code from a subroutine record, but there you can’t sleep/delay. Instead, periodically process the subroutine record which for example returns how many more seconds are left to the next threshold timestamp and use that in a calcout record to trigger processing when the time comes.
On the archive side, just archive the PVs that you want to save on “monitor” since they only send a monitor at that certain time stamp.
> I would also like that if epics restarts the intergal will initiate with the most recent value in the DB.
Having the IOC read from the DB on startup would be tricky.
I’d use autosave/restore to keep the most recent value of your integrating record.
So the IOC doesn’t read from the DB, it just counts back up with the last value it placed in the autosave file.
-Kay
- Replies:
- Re: Reset integral pv and store it Andrew Johnson
- References:
- Reset integral pv and store it Miguel
- Navigate by Date:
- Prev:
Reset integral pv and store it Miguel
- Next:
Re: Reset integral pv and store it Andrew Johnson
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
<2017>
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Reset integral pv and store it Miguel
- Next:
Re: Reset integral pv and store it Andrew Johnson
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
<2017>
2018
2019
2020
2021
2022
2023
2024
|