Mitsubishi Electric MELSERVO-J4 MR-J4 A Series - Page 180

5. PARAMETERS
5 - 37

Control
mode
No./symbol/name
Setting
digit
Function
Initial
value
[unit]
PST
PC51
RSBR
Forced stop
deceleration
time constant
This is used to set deceleration time constant when you use the forced stop
deceleration function.
Set the time per ms from the rated speed to 0 r/min.
ᒝ೙஗ᱛ󰶌ㅦ
[Pr.PC51]
0r/min
ࠨ࡯ࡏࡕ࡯࠲࿁ォㅦᐲ
ቯᩰ࿁ォㅦᐲ
࠳ࠗ࠽ࡒ࠶ࠢ
ࡉ࡟࡯ࠠ󰶌ㅦ
[Precautions]
If the servo motor torque is saturated at the maximum torque during forced stop
deceleration because the set time is too short, the time to stop will be longer
than the set time constant.
[AL. 50 Overload alarm 1] or [AL. 51 Overload alarm 2] may occur during
forced stop deceleration, depending on the set value.
After an alarm that leads to a forced stop deceleration, if an alarm that does not
lead to a forced stop deceleration occurs or if the control circuit power supply is
cut, dynamic braking will start regardless of the deceleration time constant
setting.
Setting range: 0 to 20000
100
[ms]
PC54
RSUP1
Vertical axis
freefall
prevention
compensation
amount
Set the compensation amount of the vertical axis freefall prevention function.
Set it per servo motor rotation amount.
The function will pull up an shaft per rotation amount to the servo motor rotation
direction at the time of inputting forward rotation pulse for a positive number, and
at the time of inputting reverse rotation pulse for a negative number.
For example, if a positive compensation amount is set when the [Pr. PA14
Rotation direction selection] setting is "1", compensation will be performed to the
CW direction.
The vertical axis freefall prevention function is performed when all of the following
conditions are met.
1) Position control mode
2) The value of the parameter is other than "0".
3) The forced stop deceleration function is enabled.
4) Alarm occurs or EM2 turns off when the servo motor speed is zero speed or
less.
5) MBR (Electromagnetic brake interlock) was enabled in [Pr. PD23] to [Pr. PD28],
and the base circuit shut-off delay time was set in [Pr. PC16].
Setting range: -25000 to 25000
0
[0.0001
rev]
_ _ _ x Motor-less operation selection
This is used to select the motor-less operation.
0: Disabled
1: Enabled
0h
_ _ x _ For manufacturer setting 0h
PC60

COPD
Function
selection C-D
_ x _ _ 0h
x _ _ _ 0h

Dynamic brake
deceleration
Forced stop deceleration
Rated speed
Servo motor speed
0 r/min