[Pr. Pc51_Deceleration Time Constant At Forced Stop (Rsbr)]; [Pr. Pc54_Vertical Axis Freefall Prevention Compensation Amount (Rsup1)] - Mitsubishi Electric MELSERVO-J5 Series User Manual

[Pr. PC51_Deceleration time constant at forced stop (RSBR)]

Initial value
100 [ms]
Set the deceleration time constant for the forced stop deceleration function.
Set the time taken from the rated speed to 0 [r/min] (0 [mm/s]) in units of ms.
When "0" is set, the deceleration time constant is the same as when "100" is set.
Rated speed
Servo motor speed
0 [r/min]
or
[mm/s]
• If the servo motor torque or thrust is saturated at the maximum value during forced stop deceleration because the set time
is too short, the time to stop the servo motor will be longer than the set time constant.
• [AL. 050 Overload 1] or [AL. 051 Overload 2] may occur during forced stop deceleration, depending on the set value.
• After an occurrence of an alarm to execute forced stop deceleration, if another alarm that does not execute forced stop
deceleration occurs, or if the control circuit power supply is shut off, 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 the setting time is too short, [AL. 052 Excessive
error] may occur.
• During forced stop deceleration, changes in the setting value are not reflected. If the setting value is changed during forced
stop deceleration, the change will be reflected after the deceleration is completed.
[Pr. PC54_Vertical axis freefall prevention compensation amount
(RSUP1)]
Initial value
0 [0.0001 rev], [0.01 mm]
Set the compensation amount of the vertical axis freefall prevention function.
Set the compensation amount in either the servo motor rotation amount unit or linear servo motor travel distance unit.
When a positive value is set, the compensation is performed to the command address increasing direction. When a negative
value is set, compensation is performed to the command address decreasing direction.
The vertical axis freefall prevention function is performed when all of the following conditions are met.
• The control mode is set for the position mode.
• The setting value of this servo parameter is other than "0".
• The forced stop deceleration function is enabled.
• An alarm has occurred or EM2 has turned off when the servo motor rotates at the zero speed or less.
• MBR (Electromagnetic brake interlock) was enabled in [Pr. PD23 Output device selection 1] to [Pr. PD28 Output device
selection 6], and the base circuit shut-off delay time was set in [Pr. PC16 Electromagnetic brake sequence output].
1 SERVO PARAMETER DETAILS
82
1.4 Extension setting servo parameters group ([Pr. PC_ _ ])
Setting range
0 to 20000
Forced stop deceleration Dynamic brake deceleration
[Pr. PC51]
Setting range
-25000 to 25000
Zero speed
Ver.
A0
Ver.
A0