Autonics TM Series, User Manual

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6 Parameter Settings and Functions
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6.3.3.1 Proportional Band Settings
When PV (Present Value) is within the proportional band (P), the ON/OFF ratio needs to
be adjusted during the proportional period (T). The defined proportional control (time
proportional control) section is referred to as the proportional band.
Group
Preceding
Condition
Parameter Range
Factory
Default
Unit
Control
Operation
Group
Heating, PID Heating_Proportional Band
0.1 ~ 999.9 10.0
℃
Cooling, PID Cooling_Proportional Band
6.3.3.2 Integral Time Settings
MVs from integral and proportional operation become the same when deviation is
consistent. The time taken for the two MVs to match is called the integral time.
Group
Preceding
Condition
Parameter Range
Factory
Default
Unit
Control
Operation Group
Heating, PID Heating_Integral Time
0 ~ 9999 0 Sec.
Cooling, PID Cooling_Integral Time

Integral control is not conducted if the integral time is set to 0.

Setting the integral time too short can intensify Correction
Movements and cause hunting.
6.3.3.3 Derivative Time Settings
In accordance with the deviation of the ramp, the time taken for the MV gained from
derivative operation to reach the MV gained from proportional control is called the
derivative time.
Group
Preceding
Condition
Parameter Range
Factory
Default
Unit
Control
Operation
Group
Heating, PID Heating_ Derivation Time
0 ~ 9999 0 Sec.
Cooling, PID Cooling_ Derivation Time
Derivative control is not conducted if the derivative time is set to 0.