Experimental Physics and
Industrial Control System

Luca Cavalli <[email protected]> · Wed, 13 Jul 2016 15:30:34 +0000

Hi,

I solved by setting $(SYS):$(MOD):CONVERT_CMD both as input and output (CA link
type, otherwise I don't receive the updated value as output) and avoiding
infinite calling loop by returning 1 if CONVERT_CMD value is 0.

I'm steel open to comments and suggestions on this method to solve the problem
(I have the feeling there are better ways).

Cheers,

LucaOn mer, 2016-07-13 at 12:18 +0000, Luca Cavalli wrote:
> Dear all,
>
> I have to perform a conversion of a set of coordinates using an aSub record.
> I have set the SCAN field of the record to passive and any change in a bi
> record
> ($(SYS):$(MOD):CONVERT_CMD) triggers the processing.
>
> This is an extract of the database:
>
> record(bi, "$(SYS):$(MOD):CONVERT_CMD") {
>   field(DESC, "Convert command.")
>   field(PINI, "NO")
>   field(UDF, "0")
>   field(FLNK, "$(SYS):$(MOD):COORD_CONVERTER")
>   field(VAL, "0")
>   field(ZNAM, "DONE")
>   field(ONAM, "CONVERT")
> }
>
> record(aSub, "$(SYS):$(MOD):COORD_CONVERTER") {
>   field(INAM, "convAsubInit")
>   field(SNAM, "convAsubProcess")
>   field(FTA, "DOUBLE")
>   field(INPA, "$(SYS):$(MOD):SRVY:RA_SET_POS PP")
>   field(DESC, "Coordinate converter.")
>   field(SCAN, "Passive")
>   field(INPB, "$(SYS):$(MOD):SRVY:DEC_SET_POS PP")
>   field(INPC, "$(SYS):$(MOD):SRVY:X_SET_POS PP")
>   field(INPD, "$(SYS):$(MOD):SRVY:Y_SET_POS PP")
>   field(INPE, "$(SYS):$(MOD):SRVY:Z_SET_POS PP")
>   field(INPF, "$(SYS):$(MOD):SRVY:START_TIME PP")
>   field(INPM, "$(SYS):$(MOD):CONVERT_CMD")
>   field(FTB, "DOUBLE")
>   field(FTC, "DOUBLE")
>   field(FTD, "DOUBLE")
>   field(FTE, "DOUBLE")
>   field(FTF, "DOUBLE")
>   field(FTM, "ENUM")
> }
>
> Is this the proper way to achieve this task?
>
> How to reset the $(SYS):$(MOD):CONVERT_CMD value to 0 from the C code of the
> convAsubProcess function?
>
> Does this change from 1 (CONVERT) to 0 (DONE) will trigger an additional call
> to convAsubProcess?
>
>
> Thanks for your help.
>
>
> Luca
>
>
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System