Experimental Physics and
Industrial Control System

"LYNCH, Damien" <[email protected]> · Fri, 18 Aug 2006 15:55:07 +1000

I am interested in the response to the following question as well (as I have just started using EPID this week myself).

> Another question with regard to replacing pid by epid: Apart from teh 
> above scaling issue, have I understood it correct that if the 
> following 
> scenario:
> 
> a pid record controlling an ao record, the latter in 
> OMSL=closed_loop, 
> output OIF=incremental mode, DOL referencing pid's DM
> 
> would be replaced by
> 
> epid record having OUTL point to ao record's VAL, ao record 
> in OIF=full 
> and OMSL=supervisory mode?

I see the EPID record producing a value that should be added to the ao record's VAL field, implying the ao record should have OIF=Incremntal. But with the EPID record putting OVAL into what's pointed to by OUTL (ie the ao record) I'd expect to have
OMSL=supervisory in the ao record.

The way I read the doco I thought EPID would calculate a value that would be put into the ao record (not added to what's already there).

Thanks,
Damien

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System