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<== Date ==> <== Thread ==>

Subject: Re: question about pvmonitor behavior
From: "Railton, Irie \(STFC,RAL,CLF\) via Tech-talk" <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Tue, 17 Mar 2026 14:41:01 +0000
Hi Alfio,

The pvmonitor/camonitor tools only updates (without a restart) when a PV is processed and with this setup the myaipv record does not process.
So to make the change show in the monitor you must make either the myaipv record process or restart the monitor.
To make the record process you could either add a FLNK field to the myaopv record pointing to the myaipv like so:

record(ao, "myaopv") {
    field(PINI, "YES")
    field(VAL, 30)
    field(OUT, "myaipv")
    field(FLNK, "myaipv")
}

Or more succinctly, you could add a PP to the OUT field like so:

record(ao, "myaopv") {
    field(PINI, "YES")
    field(VAL, 30)
    field(OUT, "myaipv PP")
}

You could also observe the PV changing in the monitor without these modifications to the database by forcing the myaipv record to process with a write to the PROC field like so:

pvput myaipv.PROC 1

Kind regards,
Irie Railton

Software Engineer

Software Controls Group

CLF Engineering Division


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