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(6) The simultaneous temperature rise parameter setting using self-tuning
The control response at the time of temperature rise is constantly monitored during self-tuning and the
simultaneous temperature rise parameter is calculated based on the characteristics of a controlled object.
For details on the self-tuning function, refer to the following.
Page 184, Section 8.3.15
(a) Operation with the simultaneous temperature rise parameter setting using self-
tuning
The temperature control module operates as follows.
When self-tuning is normally started up, CH Auto tuning status (RX20 to RX23) is turned on and the
1
simultaneous temperature rise parameter is calculated.
The calculated value is stored in the remote buffer memory when the simultaneous temperature rise parameter is
normally calculated. Then CH Simultaneous temperature rise parameter correction status (b1 of RWr14 to
2
RWr17) is turned 1 (ON), CH Auto tuning status (RX20 to RX23) is turned off, and the module is shifted to the
PID control.
CH□ Auto tuning status
(RX20 to RX23)
Control status
CH□ Simultaneous temperature rise gradient data
(address: 2D1H, 2D5H, 2D9H, 2DDH)
and
CH□ Simultaneous temperature rise dead time
(address: 2D2H, 2D6H, 2DAH, 2DEH)
CH□ Simultaneous temperature rise parameter
correction status (b1 of RWr14 to RWr17)
(b) Condition for the simultaneous temperature rise parameter setting using self-tuning
The condition is the same as that for the starting ST. (Page 187, Section 8.3.15 (4) (a))
When the self-tuning cannot be started up, the temperature control module operates as following with the PID
control continued.
• CH Self-tuning disable status (b8 of RWr14 to RWr17) is turned 1 (ON).
The following shows how the temperature control module operates when self-tuning is not executed.
CH□ Auto tuning status
(RX20 to RX23)
Control status
CH□ Self-tuning disable status
(b8 of RWr14 to RWr17)
Operation of the temperature control module
ON
OFF
PID control
OFF
Temperature control start,
set value (SV) change,
or oscillation detected
Controlled by the temperature control module
OFF
PID control
ON
OFF
Temperature control start,
set value (SV) change,
or oscillation detected
CHAPTER 8 FUNCTIONS
Self-tuning
PID control
Calculated
0
value
ON
8
205
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