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(2) Starting ST and vibration ST
Two types of self-tuning (ST) are available, depending on the state of the control system: starting ST and
vibration ST.
• Starting ST: Self-tuning is performed immediately after the control is started or when the set value (SV) is
changed.
• Vibration ST: Self-tuning is performed when the control system in a stable state has become oscillatory due
to reasons such as disturbance.
(a) How to set starting ST
Select one of the following four setting values in CH Self-tuning setting (Un\G574, Un\G606, Un\G638,
Un\G670). (The default is Do not run the ST (0).) ( Page 146, Section 3.4.2 (68))
• Starting ST (PID constants only) (1)
• Starting ST (Simultaneous temperature rise parameter only) (2)
• Starting ST (PID constants and simultaneous temperature rise parameter) (3)
• Starting ST plus vibration ST (PID constants only) (4)
(b) How to set vibration ST
Set the following in CH Self-tuning setting (Un\G574, Un\G606, Un\G638, Un\G670). ( Page 146,
Section 3.4.2 (68))
• Starting ST plus vibration ST (PID constants only) (4)
Time
Temperature process value (PV)
Starting ST Vibration ST