Re: Dynamically changing HIHI PV field

["Marco A. Barra Montevechi Filho via Tech-talk" <tech-talk at aps.anl.gov>]

Thanks, Torsten! It worked exactely as planned.

The only things i had to adjust were the scan fields: since my records are not asyn type, i changed the $(PREFIX)$(MOTOR_NAME)-CfgVELO-RB_ scan field to 1 second and the $(PREFIX)$(MOTOR_NAME)-CfgVELO-RB scan field to passive. So now the HIHI field of MY:VARIABLE is updated every 1 second.

Marco

---

From: Torsten Bögershausen <Torsten.Bogershausen at ess.eu>
Sent: 12 April 2022 13:46
To: Marco A. Barra Montevechi Filho <marco.filho at lnls.br>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Dynamically changing HIHI PV field

 

I think that you need two helper records.

(this is a copy of our motor-business "as is", you need to adjust the macros and such)

 

One record that is "filled" by the hardware (driver), like below, which is an input record:

 

record(ai, "$(PREFIX)$(MOTOR_NAME)-CfgVELO-RB")

{

    field(DTYP, "asynFloat64")

    field(PREC, "$(PREC)")

    field(INP,  "@asyn($(MOTOR_PORT),$(AXIS_NO))CfgVELO-RB")

    field(SCAN, "I/O Intr")

}

 

#########

The next helper record is an output record, that "pushes" it's value into the field

of the "wanted record", specified in the OUT field:

 

record(ao, "$(PREFIX)$(MOTOR_NAME)-CfgVELO-RB_")

{

    field(PREC, "$(PREC)")

    field(DOL,  "$(PREFIX)$(MOTOR_NAME)-CfgVELO-RB CP")

    field(OUT,  "$(PREFIX)$(MOTOR_NAME).VELO")

    field(OMSL, "closed_loop")

}

 

HTH
/Torsten

 

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of "Marco A. Barra Montevechi Filho via Tech-talk" <tech-talk at aps.anl.gov>
Reply-To: "Marco A. Barra Montevechi Filho" <marco.filho at lnls.br>
Date: Tuesday, 12 April 2022 at 18:12
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Subject: Dynamically changing HIHI PV field

 

Hello all.

I have an equipment which has the HIGH field configurable in the hardware. We already have a PV that reads it, but it is currently an entire PV, and not a field of another existing PV.

Im trying to get that PV result and put it in the HIGH field of another PV. Something like:

record(ai, "MY:PV") {

  field(HIHI, 10)

  field(HIGH, "ANOTHER:PV:HIGH:LIMIT PP")

  field(LOW, -1)

  field(LOLO, -5)

  field(HHSV, MAJOR)

  field(HSV, MINOR)

  field(LSV, MINOR)

  field(LLSV, MAJOR)

}

but each try of mine gets either syntax error or 'Can't set "MY:PV.HIGH" to "ANOTHER:PV:HIGH:LIMIT"'. Am i doing something wrong? Is this approach even possible?
Thanks in advance for any help.

 

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