Experimental Physics and
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I have several work a rounds. Right now, we store a timestamp PV as the acquisition time and then the data in additional PVs. The correct way is to have the DAQ system call the ca_put immediately (the data is coming in at a 5 Hz level). There are others
which collaborators have suggested as well. It just seemed unnecessarily complicated and un-natural given that there exists a location in the record for the time already. It is of course possible to write some C code for the IOC that will let you do that, but the fact that it isn’t easy is an indication to me that there may a better way to do what you’re looking for.I think that this really answers my question--it is not a trivial task. My hope was that I had missed something in the manual or mailing lists that would tell me how to do this; although, the more I think about possible implications of essentially "changing history" it is probably not a good idea to allow. Paul On 1/25/21 17:09, Johnson, Andrew N. wrote:
Hi Paul, -- 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
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ANJ, 25 Jan 2021 |
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