Mitsubishi Electric MELSERVO-J4 Series Transition Handbook page 331

Part 6: Review on Replacement of MR-J3-_T_(DIO command/ Serial communication operation) with MR-J4-_A_-RJ
MR-J3-_T_
No. Name and function
PA15 Encoder output pulse
This parameter is made valid when power is switched off,
then on after setting, or when the controller reset has
been performed.
Used to set the encoder pulses (A-phase, B-phase)
output by the servo amplifier.
Set the value 4 times greater than the A-phase or B-
phase pulses.
You can use [Pr. PC19] to choose the output pulse
setting or output division ratio setting.
The number of A/B-phase pulses actually output is 1/4
times greater than the preset number of pulses.
The maximum output frequency is 4.6Mpps (after
multiplication by 4). Use this parameter within this range.
(1) For output pulse designation
Set "_ _ 0 _" (initial value) in [Pr. PC19].
Set the number of pulses per servo motor revolution.
Output pulse = set value [pulses/rev]
For instance, set "5600" to [Pr. PA15] PA15, the actually
output A/B-phase pulses are as indicated below.
A/B-phase output pulses
(2) For output division ratio setting
Set "_ _ 1 _" in [Pr. PC19].
The number of pulses per servo motor revolution is
divided by the set value.
Resolution per servo motor revolution
Output pulse =
For instance, set "8" to [Pr. PA15], the actually output
A/B-phase pulses are as indicated below.
A/B-phase output pulses =
(3) When outputting pulse train similar to command
pulses
[Pr. PC19] to "_ _ 2 _". The feedback pulses from the
servo motor encoder are processed and output as shown
below. The feedback pulses can be output in the same
pulse unit as the command pulses.
Feedback pulses
[Pr. PA06]/[Pr. PA07]
CDV
CMX
5600
= = 1400 pulses
1
= [pulse/rev]
Set value
262144 1
・
= 8192 pulses
8 4
servo motor
M
Encoder
A/B-phase output pulses
Initial
No.
value
4000 PA15 Encoder output pulses
Set the encoder output pulses from the servo amplifier
by using the number of output pulses per revolution,
dividing ratio, or electronic gear ratio. (after multiplication
by 4).
Set a numerator of the electronic gear, for when
selecting "A-phase/B-phase pulse electronic gear setting
(_ _ 3 _)" of "Encoder output pulse setting selection" in
[Pr. PC19].
The maximum output frequency is 4.6 Mpulses/s. Set the
parameter within this range.
Setting range: 1 to 4194304
6 - 52
MR-J4-_A_-RJ
Name and function
Initial
value
4000