6 Parameter Settings and Functions
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6.3.3.1 Proportional Band Settings [PAR2 → H-P/C-P]
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 called as the proportional band.
Parameter Description
Heating Proportional Band
Cooling Proportional Band
Setting
Group
Parameter Setting Range
Factory
Default
Unit
to
Temperature: ℃/℉
Analog: %
6.3.3.2 Integral Time Settings [PAR2 → H-I/C-I]
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.
Parameter Description
Heating Integral Time
Cooling Integral Time
Setting
Group
Parameter Setting Range
Factory
Default
Unit
to
Sec
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.