Fuji Electric Model: PXR4 Instruction Manual page 18

4) Self-tuning is executed by any of the following conditions.
q During temperature rise at power ON.
w During temperature rise at SV changing if necessary.
e When control is out of stable condition and is judged as being out of stable condition continuously.
5) Self-tuning is not executed under the following conditions:
q During standby mode
w During ON/OFF control
e During auto-tuning
r During ramp/soak operation
t During input error
y With dual output ("P-n1" ≥ 4)
u When P, I, D or Ar is manually set
Under the following coditions, self-tuning is canceled.
q When SV is changed.
w When Self-Tuning can not be completed in about 9 hours after the start.
6) Cautions
· 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.
· Don't change the SV while the self-tuning is executing.
· Once PID parameters are optimized, the self-tuning is not excuted at the next power on unless SV is
changed.
· After the execution of self-tuning, if the controlability is not your expected level, please select PID or
FUZZY at "CTrL" parameter, and then, start the auto-tuning.
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