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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
A
C power supply
MCCB
R/L1
S/L2
T/L3
SF-JR motor with encoder
U
V
W
U
V
W
E
C
*3
*1
*2
*4
*5
R
PA1
FR-A7AP
PA2
PB1
PB2
PG
PG
SD
SD
Differential
Terminating
resistor ON
OFF
Complementary
A
N
H
K
IM
Forward rotation start
Reverse rotation start
Contact input common
Frequency setting
potentiometer
STF
STR
SD
10
2
5
Encoder
Earth
(Ground)
Inverter
5VDC power supply *6
(+)
(-)
MC