Re: [foxboro] foxboro Digest V8 #272

Any extraneous blocks connected to the output or feedback; except the
AOUT?  When the mv/sp offset exists, are the output and feedback
parameters equal?


Joseph M. Riccardi 
DCS Services - Industrial Process Control 

Joe@xxxxxxxxxxxxx 

"To give real service you must add something that cannot be bought or
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-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Rguercio@xxxxxxx
Sent: Monday, August 18, 2008 10:32 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] foxboro Digest V8 #272

In a message dated 8/16/2008 01:03:42 Central Daylight Time,
foxboro@xxxxxxxxxxxxx writes:
foxboro  Digest    


Have any of you fine users run into a problem of a PIDA controller  not
pushing to reach the setpoint?  This has occurred a few times recently
on newly configured (copied) PIDA blocks where no matter what I do, the
controller acts as though it has a setpoint deadband, and doesn't try to
zero in  on the setpoint.  This is with MODOPT of 4 or 5, with SPLLAG at
0 or 1;  after deleting/undeleting the block; running the INT down to
ridiculously low  values, etc.  On Windows/MESH, I/A 8.2 using ZCP270's
and FCP270's.   Any ideas?
 
RGC
12803 Josey Creek Ct.
Cypress, TX 77433
713-805-8742  cell
281-256-1111 home office/FAX
281-256-1333  home



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