Mitsubishi Electric MR-J4 Instruction Manual page 248

5. PARAMETERS
No./symbol/ Setting
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 increases in the servo motor CCW or positive direction.
selection C-A
1: Encoder pulse decreases in the servo motor CCW or positive direction.
This digit is not available with MR-J4-03A6 servo amplifiers.
_ _ 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.
This digit is not available with MR-J4-03A6 servo amplifiers.
X _ _ _ For manufacturer setting
PC51 Set 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
[Precautions]
Setting range: 0 to 20000
Detection of
disconnection
Setting
value
Z-phase-side non-
signal
0 Enabled
1 Disabled
Rated speed
Servo motor 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
Fully closed Linear servo
loop system system
[AL. 71.6] [AL. 20.6]
(Z-phase) (Z-phase)
Forced stop deceleration
[Pr. PC51]
5 - 49
Initial
value
[unit]
0h
0h
0h
0h
100
[ms]
Dynamic brake
deceleration
Control
mode
P S T