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4
ENCODER FEEDBACK CONTROL
When the FR-A7AL is mounted in the FR-A
control and Advanced magnetic flux vector control.
This function 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 it back to the inverter.
4.1
Wiring Example
Three-phase
AC power
supply
Forward rotation start
Reverse rotation start
Contact input common
Frequency setting
30
700
MCCB
MC
R/L1
S/L2
T/L3
STF
STR
SD
10
2
potentiometer
5
series, encoder feedback control is enabled during V/F
SF-JR motor with encoder
Inverter
U
U
V
V
W
W
E
Earth
(Ground)
FR-A7AL
PA
C
PAR
R
PB
A
Complementary
PBR
N
PG
H
Differential
SD
K
PG
SD
*3
*5
(+)
Terminating
resistor
*4
OFF
ON
IM
*1
Encoder
*2
(-)
5VDC power supply
*6
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