Encoder Feedback Control; Wiring Examples - Mitsubishi Electric FR-A820-00046 Instruction Manual

5

ENCODER FEEDBACK CONTROL

When the FR-A8APA is installed on the FR-A800 series inverter, encoder feedback control can be performed 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 encoder to feed back to the inverter.
For the details of the parameters used for encoder feedback control, refer to the Instruction Manual (Detailed) of the inverter.
5.1

Wiring examples

MCCB
Three-phase
AC power supply
Forward rotation start
Reverse rotation start
Contact input common
Frequency setting
potentiometer
20
ENCODER FEEDBACK CONTROL
MC
Inverter
R/L1
U
S/L2
V
T/L3
W
STF
FR-A8APA
STR
EA+ EA+
SD
EA- EA-
EB+ EB+
10
EB-
EB-
2
ER+ ER+
5
ER- ER-
EC+ EC+
EC- EC-
ED+ ED+
ED- ED-
UP UP
UN
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux
U
V
M
W
E
Earth
(Ground)
EA+ EA+
EA- EA-
EB+ EB+
EB- EB-
Encoder
ER+ ER+
ERN 1387
ER- ER-
E
EC+ EC+

EC- EC-
∗1
ED+ ED+
ED-
ED-

UP UP
UN
∗2
Connect the encoder so that there is no
looseness between the motor and
motor shaft. Speed ratio should be 1:1.
Earth (ground) the shield of the
encoder cable to the enclosure using a
tool such as a P-clip.