NOVA541
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4-5-1 Auto tuning
▪ Make auto tuning start by setting AT = ON.
▪ This parameter is skipped when ON.OF = ON in G.CTL, ON/OFF mode.
Symbol
Parameter
Setting range
Display
Unit
Default
AT
Auto Tuning
OFF, ON
AUTO mode
ABS
OFF
4-5-2 GAIN setting
▪ A parameter that determines the ratio between PID and MV. A small AT-G value makes the
response fast and a large AT-G value is favorable for stable control but it takes long time to
reach the target SP.
▪ This parameter is skipped in ON/OFF Mode.
Symbol
Parameter
Setting range
Display
Unit
Default
AT-G
Auto Tuning Gain
0.1 ~ 10.0
AUTO mode
ABS
1.0
AT GAIN(Auto Tuning Gain)
▪ A parameter to adjust the gain of MV with respect to PID.
☞ Generally, use the value obtained after auto tuning.
▪ To adjust the characteristics of control system, AT GAIN can be set manually.
○
1 If AT GAIN < 1.0, RESPONSE is fast, but PV hunting may occur.
○
2 If AT GAIN > 1.0, OVERSHOOT decreases, RESPONSE becomes slow.
Gain < 1.0
Gain = 1.0
Gain > 1.0