Shinko PCD-33A - Page 43

43
[PID auto-tuning performing conditions]
(1) When processing temperature is lower than [setting value –20 (40 )]
Fluctuation is applied at the temperature 20 (40 ) lower than the setting value.
(1) PID calculation
(2) PID values
decided
(3) Controlling action
is performed with
the values set by
PID auto-tuning.
(Fig. 7.7-2)
(2) When the control is stable or when processing temperature is within
[setting value 20 (40 )]
Fluctuation is applied at the setting value.
(1) PID calculation
(2) PID values
decided
(3) Controlling action
is performed with
the values set by
PID auto-tuning.
(Fig. 7.7-3)
(3) When the processing temperature is higher than [setting value+20 (40 )]
Fluctuation is applied at the temperature 20 (40 ) higher than the setting value.
Temperature 20 (40 ) higher than the setting value
(1) PID calculation
(2) PID values
decided
(3) Controlling action
is performed with
the value set by
PID auto-tuning.
(Fig. 7.7-4)
Temperature 20 (40 ) lower than the setting value
(1)
(2) (3)
AT starting point
Setting value
Temperature
Time
AT starting point
(1)
(2)
(3)
Temperature
Setting value
Time
AT starting point
(1)
(2)
(3)
Temperature
Setting value
Time