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4
ENCODER FEEDBACK CONTROL
Encoder feedback control is enabled when the FR-A7AP is mounted on the FR-A700 series. (under V/F
control, 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
potentiometer
24
MCCB
Inverter
R/L1
S/L2
T/L3
STF
FR-A7AP
STR
PA1
PA2
SD
PB1
10
Differential
PB2
2
5
Complimentary
Terminating
resistor ON
*4
OFF
SF-JR motor with encoder
U
U
V
V
IM
W
W
E
Earth
(Ground)
C
*1
R
A
N
Encoder
PG
H
SD
K
*2
PG
SD
*3
(-)
(+)
5VDC power supply
*5
*6
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