Re: [foxboro] 3 CHARC blocks cascaded
- From: "Joerg Wierz" <jwierz@xxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Wed, 19 Mar 2003 17:08:25 +0100
Hi, you didn't get any answers because you didn't describe your problem
completely (include top and bottom of your information stream !). What do
you want to do? If you want to maipulate a measurement you don't need any
backcalculation (forget about BCALCI/O, PRIBLK=0). If you want to adapt a
nonlinear valve characteristic in a control loop or somehing like that, then
you should implement back calculation, but you'll also have to take your
AOUT and PID block into the boat.
PID CHARC AOUT
OUT -------> MEAS OUT -------> MEAS
BCALCI<----- BCALCO BCALCI<-----BCALCO
PRIBLK=0 PRIBLK=1 PRIBLK=1
Add as many CHARC's inbetween as you like.
J.Wierz
----- Original Message -----
From: "Tamer Ahmed" <tmahmoud1973@xxxxxxxxx>
To: <foxboro@xxxxxxxxxxxxx>
Sent: Sunday, February 09, 2003 10:07 AM
Subject: [foxboro] 3 CHARC blocks cascaded
>
> we have about 56 points and we want to build 3 CHARC
> blocks in cascade
> we are using I/A 6.2.1 and we are trying to build
> these CHARC blocks by connecting the 3 CHARC blocks as
> follows:
>
> CHARC1 CHARC2 CHARC3
>
> OUT -----> MEAS OUT -----> MEAS
> BCALCI<----- BCALCO BCALCI<-----BCALCO
>
> PRIBLK=0 PRIBLK=1 PRIBLK=1
>
> but with these connections we the cascade loop are
> open. any one can help
>
>
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