Fuji Electric Micro-Controller X Socket type Operation Manual page 39

(2) PID control (Pid)
PID control starts when the parameter [CtRL] is " Pid." PID control calculate Pid and output the result according to
the set values of the parameters [P], [i], [d], and [AR]. (-5 to 105%)
Each parameter can be set either by manually tuning the values or by running auto-tuning ([AT]) to automatically
set the values.
Related parameters: Auto-tuning [At] (see page 25)
(3) Fuzzy control (FUZY)
This control minimizes the overshoot compared to normal PID. Fuzzy control can only be used after auto-tuning
has been activated and a PID set.
Related parameters: Auto-tuning [At] (see page 25)
(4) Self tuning control (SELF)
Adds controls while automatically calculating PID to meet the
control target or changing SV. Self-tuning is especially effective
for situations when a high level of control is not needed, but auto-
tuning cannot be run due to frequent changes in the control target
conditions. If a high degree of control is required, select PID
control, fuzzy control or PID2 control.
The equipment will not be tuned properly if power is turned on
●
first.
When redoing the self-tuning settings, first set the control method
●
to PID (" Pid "), and then set back to self-tuning.
Conditions where self-tuning can be used
When temperature rises right after the power is turned on
●
When temperature rises after SV change (or when the controller judges it necessary)
●
When the controller judges it necessary because the control has become unstable
●
Conditions where self-tuning cannot be used
During standby
●
During ON/OFF (2-position) control
●
During auto-tuning
●
During ramp soak operation
●
When input error occurs
●
When any of the [P], [i], [d], or [AR] parameters have been manually configured
●
During manual mode
●
During soft start
●
Conditions where self-tuning is halted
When SV is changed (including when SV is changed by the ramp soak function, remote SV function, or ramp
●
SV.)
When self-tuning has not finished after running for nine or more hours
●
Set value
SV
Dead time
37
2nd block parameter
Tuning
Delay
t