8. PARAMETER DESCRIPTION
IMR02C15-E4
8-29
Overlap/Deadband
Factory default setting:
The screen is displayed.
This is the overlapped range of proportional bands (on the heat and cool sides)
or the deadband range when Heat/Cool PID control is performed.
Data range Factory set value
TC/RTD inputs:
−10 (−10.0) to +10 (+10.0) °C [°F]
0 (0.0)
Voltage (V)/Current (I) inputs:
−10.0 to +10.0 % of Input span
0.0
Minus (−) setting results is overlap.
This parameter is displayed when in Heat/Cool PID control.
Overlap/Deadband is not displayed when the block selection at F06
[S.F06] (P. 8-76) is set to “1: No display” in the Engineering mode.
Related parameters
Parameter setting mode:
• Proportional band [heat-side] (P. 8-26)
• Proportional band [cool-side] (P. 8-28)
Engineering mode:
• Overlap/Deadband (P. 8-75)
• Cool action (P. 8-125)
Description of function
Overlap (OL): Range in which the Proportional band [heat-side] and the Proportional band
[cool-side] are overlapped. If a Measured value (PV) is within the overlapped range,
Manipulated output values (MV1 and MV2) may be simultaneously output.
Deadband (DB): This is a control dead zone existing between the Proportional band [heat-side] and
the Proportional band [cool-side]. If a Measured value (PV) is within the deadband
range, neither the Manipulated output value (MV1) nor the Manipulated output value
(MV2) is output.
Manipulated output
value (MV)
100 %
0 %
Heat-side
output value
Proportional band
[heat-side]
Cool-side
output value
Set value
(SV)
OL DB DB: Deadband
Temperature
If set to minus (-), the proportional band (on the cool side) overlaps with
the proportional band (on the heat side).
Proportional band
[cool-side]
OL: Overlap
DB
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