Re: [foxboro] PIDA Foxboroese ???s

The PID block development has a long history at Foxboro and the PIDA block
currently has the most features and flexibility of the PID family.  The PIDA
block code was developed using VisSim by Dr. Peter Hansen with inputs from
lots of PID experts and application engineers.  The success of the Exact
self tuning PID gave Foxboro a renewed interest to make addition
improvements and the self tuning functions were expanded and improved with
the FBTUNE and FFTUNE blocks which have even poorer documentation than the
PIDA block itself. The result is like a Swiss army knife.  By the way, when
the SPLAG parameter is set to 0 the controller has no output bump and only
responds at the integration rate, set to 1.0, a setpoint change will cause a
proportional bump, just as if the measurement changed by the same amount in
the opposite direction.

Rick Rys P.E.
www.R2controls.com
1 Cherry Street
Mansfield, MA 02048
508-339-6633 Home Office
508-369-5186 Mobile


 
 
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