Orientation Control; Wiring Example - Mitsubishi Electric FR-A820-00046 Instruction Manual

4

ORIENTATION CONTROL

This function is used with an encoder installed to the spindle of a machine tool, etc. to allow a rotary shaft to be stopped at the
specified position (oriented).
For the details of the parameters used for orientation control, refer to the Instruction Manual (Detailed) of the inverter.
4.1

Wiring example

MCCB MC
Three-phase
AC power
supply
Forward rotation start
Reverse rotation start
Orientation command
Contact input common
Inverter
R/L1 U
S/L2 V
T/L3 W
Earth
STF
(Ground)
FR-A8APA
STR
∗1
X22
EA+ EA+
SD
EA- EA-
∗2
ORA
EB+ EB+
ORM
∗2 EB- EB-
ER+ ER+
SE
ER- ER-
SD
EC+ EC+
FR-A8AX
∗5
EC- EC-
X15
ED+ ED+
X14
ED- ED-
X1
UP UP
X0
UN
DY
∗4
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux Vector Vector Vector
U
V
M
W

E
EA+ EA+
EA- EA-

EB+ EB+
EB- EB-
Encoder
ER+ ER+
ERN 1387
ER- ER-

E
EC+ EC+
EC- EC-
∗3

ED+ ED+
ED- ED-
UP UP 
UN
ORIENTATION CONTROL
Use Pr.178 to Pr.189 (input terminal
function selection) to assign the function
to any of terminal.
Refer to the Instruction Manual (Detailed) of
the inverter for details of Pr.178 to Pr.189
(input terminal function selection).
Use Pr.190 to Pr.196 (output terminal
function selection) to assign the function
to any of terminal.
Refer to the Instruction Manual (Detailed) of
the inverter for details of Pr.190 to Pr.196
(output terminal function selection).
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.
When a stop position command is input
from outside, a plug-in option FR-A8AX is
necessary. Refer to the Instruction Manual
(Detailed) of the inverter for details of
external stop position command.
4
17