Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 164

5. PARAMETERS
No./ Setting
symbol/name digit
PC20 _ _ _ x [AL. 10 Undervoltage] detection method selection
*COP7 Set this parameter when [AL. 10 undervoltage] occurs due to distorted power supply
voltage waveform while using FR-RC-(H) or FR-CV-(H).
Function
selection C-7 0: [AL. 10] not occurrence
1: [AL. 10] occurrence
_ _ x _ For manufacturer setting
_ x _ _ Undervoltage alarm selection
Select the alarm and warning that occurs when the bus voltage drops to the
undervoltage alarm level.
0: [AL. 10] regardless of servo motor speed
1: [AL. E9] at servo motor speed 50 r/min (50 mm/s) or less, [AL. 10] at over 50 r/min
x _ _ _ For manufacturer setting
PC21 _ _ _ x Alarm history clear selection
*BPS This parameter is used to clear the alarm history.
Alarm history 0: Disabled
clear
1: Enabled
When "Enabled" is set, the alarm history will be cleared at the next power-on. After
the alarm history is cleared, the setting is automatically disabled.
_ _ x _ For manufacturer setting
_ x _ _
x _ _ _
PC24 Set a deceleration time constant for the forced stop deceleration function.
RSBR Set the time per ms from the rated speed to 0 r/min or 0 mm/s. Setting "0" will be
100 ms.
Forced stop
deceleration
time constant
Servo motor speed
[Precautions]
This parameter corresponds to "Quick stop deceleration (6085h)". When mapped
using PDO, it may not be written with MR Configurator2.
Setting range: 0 to 20000
(50 mm/s)
Rated speed
0 r/min
(0 mm/s)
If the servo motor torque or linear servo motor thrust is saturated at the maximum
value 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, 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.
Function
Forced stop deceleration
[Pr.PC24]
5 - 43
Initial
value
[unit]
0h
0h
0h
0h
0h
0h
0h
0h
100
[ms]
Dynamic brake
deceleration