Pid Auto-Tuning Of This Controller; Specifications - Panasonic KT7 Instruction Manual

10. PID auto-tuning of this controller

In order to decide each value of P, I, D and ARW automatically, the auto-tuning process should be
made to fluctuate to obtain an optimal value.
Sometimes the auto-tuning process will not fluctuate if auto-tuning is performed at or near
room temperature. Therefore auto-tuning might not finish normally.
(A) In the case of a large difference between the SV and processing temperature as the
temperature is rising
When AT bias is set to
Temperature 20
SV
Temperature
(B) When control is stable
The AT process will fluctuate around the SV.
SV
Temperature
(C) In the case of a large difference between the SV and processing temperature as the
temperature is falling
When AT bias is set to
Temperature
SV

11. Specifications

11.1 Standard specifications
Model
Mounting
Setting
Display
PV display
SV display
20 , the AT process will fluctuate at the temperature 20
lower than the SV
(4)
AT starting point
(1)
AT starting point
(1)
20 , the AT process will fluctuate at the temperature 20
Temperature 20 higher than the SV
(4)
AT starting point
(1)
: Temperature controller
: DIN rail mounting
: Input system using membrane sheet key
: Red LED 4 digits, character size 7.4 x 4mm (H x W)
: Green LED 4 digits, character size 7.4 x 4mm (H x W)
Time
(2) (3)
Time
(3)
(2)
Time
(3)
(2)
15
lower than the SV.
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
(4) AT bias value
(Fig. 10-1)
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
(Fig. 10-2)
higher than the SV.
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
(4) AT bias value
(Fig. 10-3)