Mitsubishi Electric MELSERVO-J4 Instruction Manual page 308

7. PARAMETERS
No./ Setting
symbol/name digit
PC54 Set the compensation amount of the vertical axis freefall prevention function.
RSUP1 Set it per servo motor rotation amount or linear servo motor travel distance.
Vertical axis When setting a positive value, the servo motor/linear servo motor will pull in the
freefall direction of the servo motor rotation direction/linear servo motor travel direction at
prevention positioning address increasing with the servo motor rotation amount/linear servo
compensation motor travel distance unit. When setting a negative value, the servo motor/linear servo
motor will pull in the direction of the servo motor rotation direction/linear servo motor
amount
travel direction at positioning address decreasing with the servo motor rotation
amount/linear servo motor travel distance unit.
For example, if a positive compensation amount is set when the [Pr. PA14 Rotation
direction selection/travel direction selection] setting is "1", the axis will be pulled to the
CW direction.
The vertical axis freefall prevention function is performed when all of the following
conditions are met.
1) The value of the parameter is other than "0".
2) The forced stop deceleration function is enabled.
3) Alarm occurs or EM2 turns off when the (linear) servo motor speed is zero speed or
4) MBR (Electromagnetic brake interlock) was enabled in [Pr. PD23] to [Pr. PD26],
Setting range: -25000 to 25000
PC60 _ _ _ x Motor-less operation selection
*COPD Set the motor-less operation. This is not used in the linear servo motor control mode,
fully closed loop control, and DD motor control mode.
Function
selection C-D 0: Disabled
1: Enabled
_ _ x _ For manufacturer setting
_ x _ _
x _ _ _
less.
[Pr. PD28], and [Pr. PD47], and the base circuit shut-off delay time was set in
[Pr. PC16].
Function
7 - 51
Initial
Control mode
value
CP CL PS
[unit]
0
[0.0001
rev]/
[0.01
mm]
0h
0h
0h
0h