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141
PID control (Pr. 128 to Pr. 134)
PARAMETERS
3
5) Forward action
Increases the manipulated variable (output speed) if deviation X (set point - measured value) is negative, and
decreases the manipulated variable (output speed) if deviation is positive.
Relationships between deviation and manipulated variable (output speed)
(3) Wiring example
Deviation
Positive Negative
Reverse Action
Forward Action
Pr.128 = 10, 11 Pr.128 = 30, 31
CAUTION
1. Set "16" to the output signal terminal used (Pr. 190 to Pr. 192, Pr. 195). (Refer to page 152.)
2. Set "14" to the input signal terminal used (Pr. 180 to Pr. 183, Pr. 187). (Refer to page 150.)
manipulated variable
manipulated variable
Set point
X > 0
X < 0
Process value
+
-
[Cooling]
Deviation
Set point
Process value
Too cold Decrease the
Hot Increase the
Power
supply
MCCB
Inverter
Forward
rotation
Reverse
rotation
PID control
selection
STF
STR
SD
U
V
W
(Caution 1)
SE
Moter
IM
Output signal
common
RL
1
X14(Caution 2)
PID forward/reverse
rotation output
Deviation
signal
0 to 10V
5
R
S
T
Process
value
0 to 10V
MCCB
Inverter
STF
STR
SD
U
V
W
SE
IM
Output signal
common
RL
1
X14(Caution 2)
Forward rotation
output
Reverse rotation
output
FDN
FUP
Upper limit
Lower limit
5
2
10
Setting
potentiometer
(Set point setting)
Power
supply
Forward
rotation
Reverse
rotation
PID control
selection
(Caution 1)
Moter
-10V to 10V
R
S
T