6 Parameter Settings and Functions
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6.3.3.5 Offset Correction/Manual Reset Settings [PAR2 → REST]
When selecting P / PD control mode, there are certain temperature differences even after
PV reaches stable status since heater’s rising and falling time is inconsistent due to
thermal characteristics of control objects, such as heat capacity and the heater capacity.
This temperature difference is called OFFSET. Offset can be corrected using manual
reset.
Setting
Group
Parameter Setting Range
Factory
Default
Unit
to
%
Manual Reset Adjustments based on Control Results
Under stable control conditions, set the offset to 50% if PV and SV are identical, to over
50.0% if PV is lower than SV, and to below 50.0% if PV is higher than SV.
The offset correction feature can only be used when proportional
control is in effect. If setting the integral value to 0,the manual reset
parameter will be displayed.
The user cannot configure the manual reset setting during heating and
cooling control. Instead, the setting is automatically set to 0% for both
heating and cooling.
Applicable only when integral time is set to 0 (under P control or PD
control only).
Switching from heating and cooling control to standard control (P, PD
control) automatically configures the reset setting to 50%.
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