Experimental Physics and
Industrial Control System

Luedeke Andreas <[email protected]> · Wed, 10 Oct 2007 15:16:14 +0200

Tim Mooney wrote:

Unrelated question is, Is it possible to modify a field value in a
record

from within a subroutine? To be more specific, I have a sub record
and from

its process subroutine I want to modify a field in another record.
Can that

be done?

Yes, but it's not a good idea to do it. Better to use the genSub
record, because it has output links.

Instead of using a 'sub' / 'gensub' record at all I prefer to write
device supports for calculations.

It is easier to extend and each record type is native, e.g. it has alarm
limits, units, dead bands, etc.

You can connect an arbitrary number of records to one device support.

E.g. use 'ao' records to input to the device support and 'ai' records as
containers for the calculation results.

The DTYP specifies the device support and INP/OUT links specify the
input/output variable in my device support.
An additional 'ao' record can copy the result to your field of another
record.
- - Andreas

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System