Mitsubishi Electric MR-J4 B Series Instruction Manual page 134

5. PARAMETERS
No. Symbol
COP7
PC20 Function selection C-7
This is used to select an undervoltage alarm detection method.
Setting
digit
_ _ _ x
_ _ x _
_ x _ _
x _ _ _
BPS
PC21 Alarm history clear
Used to clear the alarm history.
Setting
digit
_ _ _ x
_ _ x _
_ x _ _
x _ _ _
PC24 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 or 0 mm/s.
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 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.
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.
Name and function
Undervoltage alarm detection method selection
When you use FR-RC, FR-CV, or FR-BU2, select "Method 2 (_ _ _
1)".
0: Method 1
1: Method 2
For manufacturer setting
Alarm history clear selection
0: Disabled
1: Enabled
When you select "Enabled", the alarm history will be cleared at next
power-on. After the alarm history is cleared, the setting is
automatically disabled.
For manufacturer setting
Rated speed Forced stop deceleration
0 r/min
0r/min
(0mm/s)
(0 mm/s)
Explanation
Explanation
[Pr.PC24]
[Pr. PC24]
5 - 37
Initial
value
(unit)
Refer to Name
and function
column.
Initial
value
0h
0h
0h
0h
Refer to Name
and function
column.
Initial
value
0h
0h
0h
0h
100
[ms]
Dynamic brake
deceleration
Setting
range
0 to
20000