Mitsubishi Electric FR-A720-0.4K Instruction Manual page 375

Special operation and frequency control
4)Reverse action
Increases the manipulated variable (output frequency) if deviation X = (set point - measured value) is positive, and
decreases the manipulated variable if deviation is negative.
Set
point
5)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.
Set
point
Relationships between deviation and manipulated variable (output frequency)
Positive
Reverse action
Forward action
(3) Connection diagram
⋅ Sink logic
⋅ Pr. 128 = 20
⋅ Pr. 183 = 14
⋅ Pr. 191 = 47
⋅ Pr. 192 = 16
⋅ Pr. 193 = 14
⋅ Pr. 194 = 15
*1 The power supply must be selected in accordance with the power specifications of the detector used.
*2 The used output signal terminal changes depending on the Pr. 190 to Pr. 196 (output terminal selection) setting.
*3 The used input signal terminal changes depending on the Pr. 178 to Pr. 189 (input terminal selection) setting.
*4 The AU signal need not be input.
364
[Heating]
+ X>0
Cold
Hot
X<0
-
Feedback signal
(measured value)
[Cooling]
X>0
+
Too cold
X<0 Hot
-
Feedback signal
(measured value)
Deviation
Negative
MCCB
Power supply
Forward
rotation
Reverse
rotation
PID control
selection
Setting
Potentiometer
(Set point setting)
AC1φ
200/220V 50/60Hz
Deviation
Increase
Decrease
Measured value
Measured value
Decrease
Increase
Deviation
Inverter
Motor
R/L1 U
V IM
S/L2
T/L3 W
STF
STR
RT(X14)
*3
During PID action
(PID)SU
*2
SD
Upper limit
(FUP)FU
*2
(FDN)OL Lower limit
10
*2
Forward rotation
2 (RL)IPF
*2
output
Reverse rotation
5
output
1
Output signal common
SE
4
*4
(Measured value) 4 to 20mA
0 24V
Power
*1
supply
Set point
Set point
Pump
P
2-wire type
3-wire
type
Detector
+ + +
- -
(OUT) (24V)
(COM)