Experimental Physics and
Industrial Control System

Heinz Junkes via Tech-talk <tech-talk at aps.anl.gov> · Thu, 11 Aug 2022 17:12:42 +0200

Thank you, yes the "Raw Soft Channel" was the deciding point.
(it's probably just too hot here in Berlin).
Heinz

> On 11. Aug 2022, at 17:09, Ralph Lange via Tech-talk <tech-talk at aps.anl.gov> wrote:
> 
> The plain "Soft Channel" Device Support does not convert - you would have to write into VAL.
> To use RVAL you need to...
> 	• use the "Raw Soft Channel" Device Support that converts
> 	• set the LINR field to select the type of conversion you want. (Probably "SLOPE" in your case.)
> Also, CP in an OUT link does not make sense - you need PP to trigger the target.
> 
> Cheers,
> ~Ralph
> 
> 
> On Thu, 11 Aug 2022 at 17:01, Heinz Junkes via Tech-talk <tech-talk at aps.anl.gov> wrote:
> I probably didn't take something into account, but unfortunately I don't see what I did wrong.
> 
> I have modified the ai- record from dbExample1.db:
> 
> record(ai, "$(user):aiExample")
> {
>         field(DESC, "Analog input")
> #       field(INP, "$(user):calcExample.VAL  NPP NMS")
>         field(ASLO, "2")
>         field(EGU, "Counts")
>         field(HOPR, "20")
>         field(LOPR, "0")
>         field(HIHI, "16")
>         field(HIGH, "6")
>         field(LOW, "4")
>         field(LOLO, "2")
>         field(HHSV, "MAJOR")
>         field(HSV, "MINOR")
>         field(LSV, "MINOR")
>         field(LLSV, "MAJOR")
> }
> 
> and write into this record (RVAL) with a calcout record:
> 
> record(calcout, "$(user):dummOut") {
>   field(INPA, "$(user):calcExample.VAL MS CP")
>   field(CALC, "A")
>   field(OUT , "$(user):aiExample.RVAL CP")
> }
> 
> RVAL is also changed, but VAL remains 0:
> 
> (base) hactar:iocmyExample junkes$ camonitor junkes:aiExample.RVAL junkes:aiExample.VAL junkes:aiExample.ASLO
> junkes:aiExample.RVAL          2022-08-11 16:52:57.014817 2 LOLO MAJOR
> junkes:aiExample.VAL           2022-08-11 16:52:57.014817 0 LOLO MAJOR
> junkes:aiExample.ASLO          2022-08-11 16:52:57.014817 2 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:52:58.016001 3 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:52:59.017708 4 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:53:00.015190 5 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:53:01.017940 6 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:53:02.015414 7 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:53:03.018187 8 LOLO MAJOR
> junkes:aiExample.RVAL          2022-08-11 16:53:04.018058 9 LOLO MAJOR
> 
> In the record reference manual :
> 
> If the device support sets the RVAL field, the LINR field controls how this gets converted into engineering units and placed in the VAL field as follows:
> 
> 1. RVAL is converted to a double and ROFF is added to it.
> 2. If ASLO is non-zero the value is multiplied by ASLO.
> 3. AOFF is added.
> 
> Danke,  for taking a look,
> Heinz

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System