Mitsubishi MR-JE-10B Instruction Manual page 127

5. PARAMETERS
No. Symbol
PC24 RSBR Forced stop deceleration time constant
Set a deceleration time constant for the forced stop deceleration function.
Set the time taken from the rated speed to 0 r/min in ms unit.
Setting "0" will be 100 ms.
Servo motor speed
[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 1] or [AL. 51 Overload 2] may occur during forced stop deceleration,
depending on the set value.
After an alarm that leads to a forced stop deceleration has occurred, if an alarm that does
not lead to a forced stop deceleration occurs or the power supply is cut, dynamic braking
will start regardless of the deceleration time constant setting.
Set a longer time than deceleration time at quick stop of the controller. If a shorter time is
set, [AL. 52 Error excessive] may occur.
Function selection C-B
PC29 *COPB
Select the POL reflection at torque control.
Setting
digit
_ _ _ x
_ _ x _
_ x _ _
x _ _ _
PC31 RSUP1 Vertical axis freefall prevention compensation amount
Set the compensation amount of the vertical axis freefall prevention function.
Set the amount in units of the servo motor rotation amount.
When a positive value is set, compensation is performed to the address increasing direction.
When a negative value is set, compensation is performed to the address decreasing 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) An 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. PD07], and the base circuit
shut-off delay time was set in [Pr. PC02].
Rated speed
0 r/min
For manufacturer setting
POL reflection selection at torque control
0: Enabled
1: Disabled
Name and function
Forced stop deceleration
[Pr. PC24]
Explanation
5 - 32
Initial
value
[unit]
100
[ms]
Dynamic brake
deceleration
Refer to the
"Name and
function" column.
Initial
value
0h
0h
0h
0h
0
[0.0001
rev]
Setting
range
0 to
20000
-25000
to
25000