MITSUBISHI ELECTRIC FR-S520 - Manual (Page 113)

104
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.
Set point
X>0
X<0
Feedback signal
(Process value)
+
-
[Cooling]
Too cold down
Hot up
Set point
Process value
Deviation
Relationships between deviation and manipulated variable (output frequency)
Deviation
Positive Negative
Reverse action ! "
Forward action " !
(3) Wiring example
Pr. 60 = 14
Pr. 64 = 15
Pr. 65 = 16
Pr. 88 = 20
Limit signal
common
For
2-wire
type
Detector
Motor
Power
supply
NFB
Inverter
0 24V
DC
power supply (*1)
R(L
1
)
S(N)
T
STF
STR
SD
10
2
5
4
U
V
W
SE
(Process value) 4 to 20mA
IM P
- + + +
-
(O
U
T
)
(2
4V
)
A
C
RUN(FUP,FDN)
PID control
selection
RL(X14)(*3)
(*2)
Forward rotation
Reverse rotation
Setting
potentiometer
(Set point setting)
Pump
For
3-wire
type
Upper limit
(Lower limit)
Forward (reverse)
rotation output
signal common
Forward
rotation output
Reverse
rotation output
AC1
200/220V 50/60Hz
(C
O
M
)
CAUTION
*1. The power supply must be selected in accordance with the power specifications
of the detector used.
*2. The output signal terminals used depends on the Pr. 64, Pr. 65 settings.
*3. The input signal terminal used depends on the setting of Pr. 60 to Pr. 63.
•
The contact input signal (AU Signal) need not be turned on.