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<== Date ==> <== Thread ==>

Subject: RE: looking for OSI version of epid record
From: "LYNCH, Damien" <[email protected]>
To: "'Tim Mooney'" <[email protected]>
Cc: [email protected]
Date: Mon, 21 Aug 2006 12:13:31 +1000
Hi Tim,

> > 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.
> 
> Hang in there and see what happens as the controlled value 
> responds to the new output value.  With KP!=0 and KI==KD==0, 
> you should see ERR=VAL-CVAL, and 
> OVAL=KP*ERR.  If not, do a "dbpr" on the record and send 
> that.  There might be some control field we're not thinking 
> about with an unexpected value.
> 

ERR is calculated correctly and OVAL contains the value == KP * ERR.

But this value now in OVAL is one that I would want to add to the VAL field in the ao record pointed to by OUTL (which in my case writes to a magnet power supply). Is it up then to the database designer to perform an OVAL + ao.VAL calculation and get the
result into ao.VAL?

Thanks,
Damien

Replies:
Re: looking for OSI version of epid record Andrew Johnson

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