Mitsubishi Electric FR-E560 Series Instruction Manual page 149

4) Reverse action
Increases the manipulated variable (output frequency) if deviation X = (set point
- process value) is positive, and decreases the manipulated variable if deviation
is negative.
[Heating]
+
Set point
−
Feedback signal
(Process value)
5) Forward action
Increases the manipulated variable (output frequency) if deviation X = (set point
- process value) is negative, and decreases the manipulated variable if
deviation is positive.
[Cooling]
+
Set point
Feedback signal
(Process value)
Relationships between deviation and manipulated variable (output frequency)
Reverse
action
Forward
action
Cold → up
X>0
Hot → down
X<0
Too cold → down
X>0
X<0 Hot → up
−
Deviation
Positive Negative
139
PARAMETERS
Set point
Deviation
Process value
Process value
Set point
Deviation
4