Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 165

5. PARAMETERS
No./ Setting
symbol/name digit
PC26 _ _ _ x For manufacturer setting
**COP8
_ _ x _
Function
_ x _ _
selection C-8
x _ _ _ Load-side encoder cable communication method selection
Select an encoder cable to be connected to the CN2L connector.
0: Two-wire type
1: Four-wire type
When using a load-side encoder of A/B/Z-phase differential output method, set "0".
Incorrect setting will trigger [AL. 70] and [AL. 71].
PC27 _ _ _ x Encoder pulse count polarity selection
**COP9 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-9
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
PC31 Set the compensation amount of the vertical axis freefall prevention function.
RSUP1 Set it per servo motor rotation amount or linear servo motor travel distance.
Vertical axis When setting a positive value, the servo motor or linear servo motor moves in the
freefall direction set with [Pr. PA14] for the forward rotation pulse input. When setting a
prevention negative value, the servo motor or linear servo motor moves in the direction set with
compensation [Pr. PA14] for the reverse rotation pulse input.
amount
For example, when [Pr. PA14 Rotation direction selection/travel direction selection]
is set to "1" and a positive value is set for the compensation amount, the servo motor
pulls up in the CW direction.
The vertical axis freefall prevention function is performed when all of the following
conditions are met.
1) Position mode
2) The setting value of this parameter is other than "0".
3) The forced stop deceleration function is enabled.
4) Alarm occurs or EM2 turns off when the servo motor speed is zero speed or less.
5) MBR (Electromagnetic brake interlock) was enabled in [Pr. PD07] to [Pr. PD09],
Setting range: -25000 to 25000
Detection of
disconnection
Setting
value
Z-phase-side non-
signal
0 Enabled
1 Disabled
and the base circuit shut-off delay time was set in [Pr. PC02].
Function
Alarm status
Full. Lin.
[AL. 71.6] [AL. 20.6]
(Z-phase) (Z-phase)
5 - 44
Initial
value
[unit]
0h
0h
0h
0h
0h
0h
0h
0h
0
[0.0001
rev]/
[0.01
mm]