Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 59

Part 2: Review on Replacement of MR-J2S-_A_ with MR-J4-_A_
MR-J2S-_A_
No. Name and function
21 Function selection 3 (command pulse selection)
Used to select the input form of pulse train input signals.
0 0
Command pulse input form
0: Forward/reverse rotation pulse
train
1: Signed pulse train
2: A/B-phase pulse train
Pulse train logic selection
0: Positive logic
1: Negative logic
Initial
No.
value
0000h PA13 Command pulse input form
0
Refer to the comparison table below for the setting
method.
Command pulse setting comparison table
MR-J2S-_A_
No.21
0 0 0 0
0 0 0 1
0 0 0 2
0 0 1 0
0 0 1 1
0 0 1 2
Note 1. Make sure to set a pulse train input filter. If it is not set,
position mismatch will occur.
2. It is necessary to adjust the command pulse logic to the
positioning module. An incorrect logic setting causes the
motor to not rotate. Make sure to configure the settings.
Refer to "3.7 Important Points for Replacement
(Command Pulse Logic Settings)".
2 - 28
MR-J4-_A_
Name and function
Command pulse input form
0: Forward/reverse rotation
pulse train
1: Signed pulse train
2: A/B-phase pulse train
Pulse train logic selection
0: Positive logic
1: Negative logic
Command input pulse train filter
Selecting a proper filter suited
to the selection command pulse
frequency enables
enhancement of noise
immunity.
0: Command input pulse train
is 4 Mpulses/s or less.
1: Command input pulse train
is 1 Mpulse/s or less.
2: Command input pulse train
is 500 kpulses/s or less.
3: Command input pulse train
is 200 kpulses/s or less.
(Corresponds to software
version A5 or later)
MR-J4-_A_
PA13 (Note 1)
Differential input Open-collector input
0 _ _ 0 0 _ _ 0 (Note 2)
0 _ 0 1 0 _ 0 1
0 _ 0 2 0 _ 0 2
→
0 _ _ 0 0 _ _ 0 (Note 2)
0 _ 1 1 0 _ 1 1
0 _ 1 2 0 _ 1 2
Control
Initial
mode
value
0100h P