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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: Altering timestamp of softIOC PV |
| From: | "Reimer, Paul E. via Tech-talk" <tech-talk at aps.anl.gov> |
| To: | "Arnold, Ned D." <nda at anl.gov>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Mon, 25 Jan 2021 22:41:43 +0000 |
The "acquisition time" is a trigger generated elsewhere and served by equipment that, at this time, can't talk directly to EPICS. The best solution is to have the acquisition system talk directly with EPICS--I argued for this--but that is not what I have. The data is essentially buffered (with and acquisition timestamp) and then handed off to a system that talks with EPICS.
Paul
> I would like the timestamp field for that PV to reflect the acquisition time rather
than the time that the ca_put(DBR_LONG, stchid, &iParVal) routine is
called.
Is the "acquisition time" a user defined time, an event within the IOC, or an external trigger generated from somewhere else?
Ned
From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Reimer, Paul E. via Tech-talk <tech-talk at aps.anl.gov>
Sent: Monday, January 25, 2021 02:14 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Altering timestamp of softIOC PVHello,
Is it possible to alter the timestamp field of a PV? Specifically, I
have a situation in which data is recorded by a computer, but might not
be put into EPICS immediately (few sec delay is possible). I would like
the timestamp field for that PV to reflect the acquisition time rather
than the time that the ca_put(DBR_LONG, stchid, &iParVal) routine is
called. I note that the time field is of type "NOACCESS" in the manual.
Thanks,
Paul
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Paul E Reimer +1-630-252-4037 (Office)
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-- If you receive this e-mail after hours, during a weekend, or on a holiday, please enjoy your time off and respond during your working hours. Paul E Reimer +1-630-252-4037 (Office) Bldg 203, Physics Division +1-630-252-3903 (fax) Argonne National Laboratory +1-630-344-9207 (mobile) 9700 S Cass Ave reimer at anl.gov Lemont, IL 60439 USA. he/his/him