Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Fri, 22 Nov 2013 09:37:31 -0600

On 11/22/13 4:10 AM, Benoit wrote:
> Hi Lewis,
>
> about my previous problem I was wondering if I could do the conversion
> in one step with something similar as below (This does not work)
>
> record(ao, "$(S):$(D)_$(C):CavVSet")
> {
>   field(DTYP, "asynFloat64")
>   field(OUT,  "@asyn($(PORT),$(ADDR),$(TIMEOUT))cavvolt")
>   field(VAL, "0")
>   field(PREC, "2")
> }
> record(calcout, "$(S):$(D)_$(C):CavMilliVSet")
> {
>   field(OUT, "$(S):$(D)_$(C):CavVSet PP")
>   field(OCAL, "1000 * VAL")
>   field(PINI, "YES")
>   field(PREC, "1")
> }
>
>
> Actually I am doing as below, but I need a temporary record to perform
> this conversion, and It would be simpler to use one record less.
>
> record(ao, "$(S):$(D)_$(C):CavMilliVSet")
> {
>   field(DESC, "CavMilliVSet Temporary Set Record")
>   field(PINI, "YES")
>   field(EGU,  "mV")
>   field(PREC, "1")
> }
> record(calcout, "$(S):$(D)_$(C):CavMilliVCalc")
> {
>   field(OUT, "$(S):$(D)_$(C):CavVSet PP")
>   field(CALC, "1000 * A")
>   field(INPA, "$(S):$(D)_$(C):CavMilliVSet.VAL CP MS")
>   field(PINI, "YES")
> }

Hi, Benoit.

I'm not sure what you're asking.  There are two records in both of your
examples, so I don't see how the first one uses one less record than the
second.

Regardless, I think I see the problem with your first example.  You have
your calculation expression in the OCAL field of the calcout record, but
it should instead be in the CALC field.  The OCAL field is an additional
calculation expression that would only be used if you set the DOPT field
to "Use OCAL".  But you don't need that.  You should just use the CALC
field which will put the result of the expression in the VAL field which
will be written to the OUT link.

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System