Re: calcout record processing

["Arnold, Ned D. via Tech-talk" <tech-talk at aps.anl.gov>]

>  I thought calc records were supposed to be processed whenever their inputs were processed.

Only of the CP flag is set for that input link.

So you have two choices ...

    FLNK from fsControl to fsCalc. 

        or

    Change fsCalc.INPA to. "$(P):fsControl CP"

  Ned

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Randall Cayford via Tech-talk <tech-talk at aps.anl.gov>
Sent: Thursday, May 6, 2021 12:43 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: calcout record processing

 

I’m trying to do a simple chain of an input record, a calc record and an output record.  I can’t get the calc record to process unless I force it.

I have:

record(ai, “$(P):fsControl")

{

    field(DTYP, "asynInt32")

    field(PREC, "5")

    field(SCAN, "Passive")

    field(FLNK, "$(P):fsCalc PP")

}

record(calcout, "$(P):fsCalc")

{

    field(DESC, "Convert 1,0 shutter to 3,1")

    field(INPA, "$(P):fsControl")

    field(CALC, "A * 2 + 1")

    field(OUT,  "$(P):fsSet PP")

    field(OOPT, "Every Time")

    field(SCAN, "Passive")

}

record(ao, "$(P):fsSet")

{

    field(DTYP, "asynInt32")

    field(OUT,  "@asyn($(PORT,recursive),0,1)PMAC_WI_M8192")

    field(SCAN, "Passive")

}

If I put to fsControl, it sets but nothing happens.  If I put to fsCalc.PROC, everything works correctly - it reads fsControl, calculates the VAL and triggers fsSet with the calculated value.  If I make fsCalc SCAN periodic it also works.  I thought calc records were supposed to be processed whenever their inputs were processed.  I’ve tried with and without the FLNK in fsControl.  So I’m missing something about how calc record processing is triggered.

Randall Cayford

BCSB - LBNL