Mitsubishi Melservo-J2-Super series Instruction Manual page 59

4. OPERATION AND FUNCTIONS
4.1.4 Setting of full closed encoder polarity
(1) Parameter
No. Abbreviation
62 FCT
Note 1. When changing the setting of the above parameter, set "000F" in parameter No. 40 "parameter block ( BLK)".
2. After setting the parameter marked , switch power off once. The setting is made valid by switching power on again.
(2) Parameter setting method
Make setting so that the CCW direction (forward rotation direction) of the servomotor matches the
increasing direction of the full closed encoder feedback.
This setting must be made for all linear scales or rotary encoders.
[Pr. 62 = 0 : When the encoder address increasing direction is set for motor CCW]
[Pr. 62 = 1 : When the encoder address increasing direction is set for motor CW]
(3) How to confirm the full closed encoder feedback direction
For the way to confirm the full closed encoder feedback direction, refer to "4.1.6 Confirmation of full
closed encoder position data".
CAUTION
Name and Function
Full closed selection
Select the full closed encoder direction, full closed
control error detection function 1 and full closed control
error detection function 2.
Full closed encoder polarity
0: Scale increasing direction in motor CCW
direction
1: Scale increasing direction in motor CW
direction
Servo motor
Linear scale
Servo motor
Linear scale
If a wrong value is set in the encoder direction of the full closed encoder
selection (parameter No. 62), normal operation may not performed, causing
machine collision. It may also cause a servo alarm (AL. 42) during
positioning operation.
The above full closed encoder polarity setting is irrelevant to Pr. 7 (POL)
"rotation direction selection". As described above, always make setting
according to the relationship between the servo motor and linear scale or
rotary encoder.
Motor CCW direction
Linear scale increasing direction
Motor CCW direction
Linear scale increasing direction
4 - 4
Initial Setting
Unit
Value Range
1300 0000h
to
1312h