172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
202
PID control (direct action)
The Manipulated output value (MV) increases
as the Measured value (PV) increases.
This action is used generally for cooling
control.
PID control (reverse action)
The Manipulated output value (MV) decreases
as the Measured value (PV) increases.
This action is used generally for heating control.
ON/OFF action
ON/OFF control is possible when the Proportional band [heat-side] is set to 0. In
ON/OFF control with Reverse action, when the Measured value (PV) is smaller than
the Set value (SV), the Manipulated output (MV) is 100% or ON. When the PV is
higher than the SV, the MV is 0% or OFF. Differential gap setting prevents control
output from repeating ON and OFF too frequently.
Refer to 8.6 Controlling with ON/OFF Action for ON/OFF action.
Heating/Cooling PID control
In Heating/Cooling control, only one controller enables heating and cooling control.
Refer to 8.7 Controlling with Heating/Cooling Action for Heating/Cooling PID
control.
PV
MV
Direct action
PV
MV
Reverse action
Summary of Contents for SC-F71
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Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
Page 114: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 113 Setting procedure ...
Page 131: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 130 Setting procedure ...
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Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
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Page 347: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 346 Operating procedure ...
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