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4
ENCODER FEEDBACK CONTROL
Mount FR-A7AP to an FR-A700 series inverter to perform encoder feedback control under V/F control or
Advanced magnetic flux vector control.
This controls the inverter output frequency so that the motor speed is constant to the load variation by
detecting the motor speed with the speed detector (encoder) to feed back to the inverter.
4.1
Wiring Examples
Three-phase
AC power supply
Forward rotation start
Reverse rotation start
Contact input common
Frequency setting
27
MCCB
MC
R/L1
S/L2
T/L3
STF
STR
SD
10
2
potentiometer
5
SF-JR motor with encoder
Inverter
U
U
V
W
W
Earth
(Ground)
FR-A7AP
PA1
C
PA2
R
PB1
Differential
PB2
N
PG
H
Complementary
SD
PG
Terminating
resistor ON
SD
*3
(+)
*5
*4
OFF
V
IM
E
*1
A
Encoder
K
*2
(-)
5VDC power supply
*6
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