Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 61

Part 2: Review on Replacement of MR-J2S-_A_ with MR-J4-_A_
MR-J2S-_A_
No. Name and function
26 Analog torque command maximum output
Used to set the output torque at an analog torque
command voltage (TC = ±8 V) of +8 V assuming that the
maximum torque is 100[%].
For example, when the setting value is 50 and TC = +8 V,
50
Maximum torque ×
100
27 Encoder output pulses
Used to set the encoder pulses (A-phase and B-phase)
output by the servo amplifier. Set the value 4 times
greater than the A-phase and B-phase pulses.
[Pr. 54] can be used to choose the output pulse setting or
output dividing ratio setting.
The number of A-phase and B-phase pulses actually
output is 1/4 times greater than the preset number of
pulses.
The maximum output frequency is 1.3 Mpulses/s (after
multiplication by 4). Use this parameter within this range.
For output pulse designation
Set [Pr. 54] to "0 _ _ _" (initial value).
Set the number of pulses per servo motor revolution.
Output pulse = setting value [pulse/rev].
For instance, when "5600" is set, the actual output A-
and B-phase pulses are as follows.
A-phase/B-phase output pulse =
For output division ratio setting
Set [Pr. 54] to "1 _ _ _".
The number of pulses per servo motor revolution is
divided by the set value.
Resolving power of
one rotation of servo motor
Output pulse =
For instance, when "8" is set, the actual output A- and
B-phase pulses are as follows.
A-phase/B-phase 131072
=
output pulse
28 Internal torque limit 1
Set the parameter assuming that the maximum torque is
100 [%]. The parameter is for limiting the torque of the
servo motor.
When "0" is set, no torque is generated.
(Note) TL
0 Internal torque limit 1 (Parameter No.28)
Analog torque limit < Internal torque limit 1
1
Analog torque limit > Internal torque limit 1
Note. 0: OFF
1: ON
When torque is output in analog monitor output, this
setting value will be the maximum output voltage (+8 V).
is output.
5600
= 1400 [pulse]
4
[pulse/rev]
4
1
= 4096 [pulse]
8 4
Torque limit
: Analog torque limit
: Internal torque limit 1
Initial
No.
value
100 PC13 Analog torque command maximum output
Set the same value as for MR-J2S-_A_.
4000 PA15 Encoder output pulse
Used to set the encoder pulses (A-phase and B-
phase) output by the servo amplifier.
Refer to the comparison table below for the setting
method.
Encoder output pulse setting comparison table
(1) For primary replacement (Note 1)
MR-J2S-_A_
・In this parameter, set the value of "N × 32".
No.54
(Note 2)
1 _ _ _
0 _ _ _
Note 1. N = J2S setting value.
2. Set the same value as for J2S in MR-J4-
_A_ [Pr. PA15].
(2) For secondary/simultaneous replacement (Note 1)
MR-J2S-_A_
No.54
(Note 2)
1 _ _ _
0 _ _ _
Note 1. For the primary, secondary and simultaneous
replacement, refer to "[Appendix 2] Introduction
to Renewal Tool".
2. N = J2S setting value.
3. For dividing ratio settings, set a value 32 x
the MR-J2S-_A_ setting value for
MR-J4-_A_ [Pr. PA15].
PC19 Encoder output pulse selection
Refer to the comparison table above for the setting
method.
100 PA11 Forward rotation torque limit
You can limit the torque generated by the servo
motor.
Set the same value as for MR-J2S-_A_.
PA12 Reverse rotation torque limit
You can limit the torque generated by the servo
motor.
Set the same value as for MR-J2S-_A_.
2 - 30
MR-J4-_A_
Name and function
MR-J4-_A_
No.27 PA15
PC19
(Note 3)
N 0 _ 1 _ N
→
N 0 _ 0 _ N
MR-J4-_A
No.27
PC19 PA15
N × 32
N 0 _1 _
(Note 3)
→
N 0 _0 _ N
Control
Initial
mode
value
100.0 T
4000 P
S
T
0000h
100.0 P
S
T
100.0