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6-3 Self-tuning
1) At power on, changing a set value or the external disturbance, tuning is made automatically so that the
PID parameters are re-optimized.
It is useful where modication of PID parameters is required repeatably due to frequent change in process
condition.
If high controllability is important, select the PID or fuzzy control algorithm and use auto-tuning.
2) Setting for self-tuning
(1) Turn on the power and set the SV.
(2) Select SELF at "CTrL" (control algorithm) parameter.
(3) Turn off the power once.
(4) Turn on the power of the whole system. The controller should be turned on at the same time with the
other equipments or even later. Otherwise, the self-tuning might not be performed successfully.
(5) Self-tuning starts. Then the point indicator at the lower right corner starts blinking until the PID
parameters are re-optimized.
Note) Whenever it is necessary to re-try the self-tuning, please set "CTrL" = PID once, and then start
the above setting procedure from the beginning.
3) Self-tuning indication
2nd block parameter
· Set “CTrL” (control algorithm) as SELF.
PID PID control
FUZY Fuzzy control
SELF Self-tuning control
The point indicator at the lower right corner starts blinking until the PID
parameters are re-optimized.
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