Mitsubishi Electric MELSERVO-J4 Instruction Manual page 307

7. PARAMETERS
No./ Setting
symbol/name digit
PC45 _ _ _ X Encoder pulse count polarity selection
*COPA Select a polarity of the linear encoder or load-side encoder.
Function 0: Encoder pulse increasing direction in the servo motor CCW or positive direction
selection C-A
1: Encoder pulse decreasing direction in the servo motor CCW or positive direction
_ _ X _ For manufacturer setting
_ X _ _ Selection of A/B/Z-phase input interface encoder Z-phase connection judgement
function
Select the non-signal detection status for the pulse train signal from the A/B/Z-phase
input interface encoder used as a linear encoder or load-side encoder.
This function is enabled only when you use an A/B/Z-phase input interface encoder.
X _ _ _ For manufacturer setting
PC51 Set a deceleration time constant when you use the forced stop deceleration function.
RSBR Set the time per ms from the rated speed to 0 r/min or 0 mm/s.
Forced stop
deceleration
time constant
Servo motor speed
[Precautions]
Setting range: 0 to 20000
Detection of
disconnection
Setting
value
Z-phase-side
non-signal
0 Enabled
1 Disabled
Rated speed
(Linear servo
motor 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 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.
Function
Alarm status
Full. Lin.
[AL. 71.6] [AL. 20.6]
(Z-phase) (Z-phase)
Forced stop deceleration
[Pr. PC51]
7 - 50
Initial
value
[unit]
0h
0h
0h
0h
100
[ms]
Dynamic brake
deceleration
Control mode
CP CL PS