Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 673 / 826

Parameter Special operation
FR-A700 EC 6 - 493
Reverse action
Increases the manipulated variable fi (output frequency) if deviation X = (set point
−
measured
value) is positive, and decreases the manipulated variable if deviation is negative.
Forward action
Increases the manipulated variable (output frequency) if deviation X = (set point
−
measured
value) is negative, and decreases the manipulated variable if deviation is positive.
Relationships between deviation and manipulated variable (output frequency).
I000047C
Fig. 6-240: Heater
I000048C
Fig. 6-241: Cooling
Deviation
Positive Negative
Reverse action
Forward action
Tab. 6-168: Relationships between deviation and manipulated variable
X<0
+
–
X>0
t
Set point
Deviation
Feedback signal
(measured value)
Set point
Measured value
Cold
→
fi increased
Hot
→
fi decreased
X<0
+
–
X>0
t
Set point
Deviation
Feedback signal
(measured value)
Set point
Measured value
Too Cold
→
fi decrease
Hot
→
fi increase