Experimental Physics and
Industrial Control System

Ned Arnold <[email protected]> · Wed, 24 Oct 2001 11:55:24 -0500 (CDT)

> Hi,
> 
> Can the previous input values be used in the expression for a 
> calculation record?
> 
> Thanks
> 
> Geoff
> 

Yes. Since the input links are fetched in alphabetical order, you can do the
following ...

record(calc, "calcRecord1")
{
        field(INPA, "calcRecord1.B  NPP NMS")
        field(INPB, "someOtherPV.VAL NPP NMS")
        field(INPC, "calRecord1.LB NPP NMS")
}

Both A and C will have the previous value of "someOtherPV" while B will 
have the current value.

	Ned

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System