[foxboro] Splitted range PID anti windup

Hi all,

I have a PID loop controlling a splitted range actuators, I mean, a PIDXE
block which .out goes to 2 char funtions: one with in1=[0, 50,
100%]:out1=[0, 100, 100%]  and other with in2=[0, 50, 100%]:out2=[0, 0,
100%].

Sometimes the actuator connected to the second char (2) is closed manually
so we cannot count on it, so I connected a logic to pidxe HOLIM to limit the
.out at 50% to avoid windup during this (50to100) range. So it can "return"
in good way from top.
I have the feeling it's not right.

Is the pidxe still calculating errors and compensations despite HOLIM ?? I
have too heavy response fot this second actuator when is returned to auto
(on).
Do you have some more "elegant" way to do it ?

thanks
Jaime Claramunt
INFORSA
 
 
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