Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 60

Part 2: Review on Replacement of MR-J2S-_A_ with MR-J4-_A_
MR-J2S-_A_
No. Name and function
22 Function selection 4
Used to select a stop method when LSP (Forward
rotation stroke end) and LSN (Reverse rotation stroke
end) are turned off, and to select VC/VLA voltage
averaging.
0 0
Stop method when LSP (forward
rotation stroke end) and LSN (reverse
rotation stroke end) are effective
0: Quick stop
1: Slow stop
VC/VLA voltage averaging
This is used to set the filtering time
when VC (Analog speed command)
or VLA (Analog speed limit) is
imported.
Set 0 to vary the speed to voltage
fluctuation in real time. Increase the
set value to vary the speed slower to
voltage fluctuation.
Setting value
23 Feed forward gain
Set the feed forward gain.
When the setting is 100%, the droop pulses during
operation at constant speed are nearly zero. However,
sudden acceleration/deceleration will increase the
overshoot. As a standard, when setting the feed forward
gain as 100%, set 1 s or more as the
acceleration/deceleration time constant up to the rated
speed.
24 Zero speed
Used to set the output range of ZSP (Zero speed
detection).
25 Analog speed command maximum speed
Used to set the speed at the maximum input voltage (10
V) of VC (Analog speed command).
When "0" is set, the speed will reach the rated speed of
the connected servo motor.
Analog speed limit - Maximum speed
Used to set the speed at the maximum input voltage (10
V) of VLA (Analog speed limit).
When "0" is set, the speed will reach the rated speed of
the connected servo motor.
0000h
Filtering time [ms]
0 0
1 0.444
2 0.888
3 1.777
4 3.555
Initial
No.
value
PD30 Function selection D-1
0 0 0
Set the same value as for MR-J2S-_A_.
PC23 Function selection C-2
0 0 0
Set the same value as for MR-J2S-_A_.
0 PB04 Feed forward gain
Set the feed forward gain.
Set the same value as for MR-J2S-_A_.
50 PC17 Zero speed
Used to set the output range of ZSP (Zero speed
detection).
Set the same value as for MR-J2S-_A_.
0 PC12 Analog speed command - Maximum speed
Set the value according to the following method.
(1) When the setting value of MR-J2S-_A_ [Pr. 25] is
"0", set the rated speed of the existing motor.
Example: HC-KFS053 motor → PC12: "3000"
(2) When the setting value of MR-J2S-_A_ [Pr. 25] is
a value other than "0", set the same value as for
MR-J2S-_A_.
0 Analog speed limit maximum speed
Set the value in the same way as above.
2 - 29
MR-J4-_A_
Name and function
Stop method when LSP
(Forward rotation stroke end)
and LSN (reverse rotation
stroke end) are turned OFF
0: Quick stop
1: Slow stop
VC/VLA voltage averaging
selection
Setting value Filtering time [ms]
0 0
1 0.444
2 0.888
3 1.777
4 3.555
Control
Initial
mode
value
0000h P
S
0000h S
T
0 P
50 P
S
T
0 S
T