Mitsubishi Electric MELSERVO-J3 Series Handbook page 410

Part 6: Common Reference Material
(4) Rotation direction setting
Rotation directions can be different among a controller command, master axis, and slave axes. To align
the directions, set [Pr. PA14] referring to (4) of this section. Not doing so can cause such as an overload
due to a reverse direction torque against machine system rotation direction.
Controller
[Pr. PA14]
Master axis
0 or 1 (Note)
Slave axis 1
Slave axis 2
Slave axis 3
Note. Setting "1" will reverse the polarity.
Rotation direction setting of master and slave axes with torque command method for an example of one
master axis and three slave axes
No. Symbol
PA14 *POL Rotation direction selection
1. For master axis
Select a servo motor rotation direction of master axis to SSCNET controller command.
0: Servo motor CCW rotation in positioning address increase direction
1: Servo motor CW rotation in positioning address increase direction
2. For slave axis
Select servo motor rotation direction to a command from master axis.
0: Torque command polarity from master axis
1: Reverse of torque command polarity from master axis
The following shows a setting example of rotation direction for a platform truck with one master axis and
three slave axes.
To set a rotation direction of the servo motor according to the moving direction, set the torque command
polarity to the slave axis 1 the same as that to the master axis, and set the opposite polarity to the slave
axis 2 and slave axis 3 from the master axis.
Slave axis 2
CW
Moving direction
CCW
Master axis
+
POL Position control
-
[Pr. PA14]
POL
0 or 1 (Note)
[Pr. PA14]
POL
0 or 1 (Note)
[Pr. PA14]
POL
0 or 1 (Note)
Table 5.11 Rotation direction setting parameter
CW
CCW
Slave axis 1
+
Speed control
-
S
Name and function
Slave axis 3
Axis
Master axis
Slave axis 1
Slave axis 2
Slave axis 3
6 - 133
+
Current control
-
+
Current control
-
+
Current control
-
+
Current control
-
[Pr. PA14] setting
[Pr. PA14]
0
0
1
1