[foxboro] PIDA-FBTUNE configuration

Dear I/A users,

I have been trying now for days to set up a PIDA-FBTUNE combo to automatically 
tune (selftune) a real level control application in a mineral processing 
rougher circuit (I am trying only for a first stage rougher bank before copying 
to others).

The question I have is why if I get a confirmed Peak_1 or Peak_2 search and 
then the measurement crosses the setpoint value, I always have a "SETTLE" 
status?  This brings back to search for Peak_1.

In other words, I know there will be another Peak after crossing the setpoint 
value, but the algorithm somehow starts again from Peak_1 rather than 
continuing the next peak search.

Please have a look at the lower left quarter screen trend, where we know that 
there is a pattern in measurement (cyan color) against the setpoint (purple).  
The output is given in white.

What FBTUNE parameters can I adjust to prevent "SETTLE" when measurement 
crosses the setpoint value (line)?

Many thanks for any insights given.

Budana Prijadi
(GMT +09:00)

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