Mitsubishi Electric MELSERVO-J2-Super Series, Transition Handbook

Page: 55 / 662

Part 2: Review on Replacement of MR-J2S-_A_ with MR-J4-_A_
2 - 24
MR-J2S-_A_ MR-J4-_A_
Control
mode
No. Name and function
Initial
value
No. Name and function
Initial
value
13 S-pattern acceleration/deceleration time constant
This is used to smooth start/stop of the servo motor.
Set the time of the arc part for S-pattern
acceleration/deceleration.
STA: Acceleration time constant ([Pr. 11])
STB: Deceleration time constant ([Pr. 12])
STC: S-pattern acceleration/deceleration time constant
([Pr. 13])
If STA (acceleration time constant) or STB (deceleration
time constant) is set to be longer, an error may occur in
the time of the arc part for the S-pattern
acceleration/deceleration time constant setting.
The upper limit value of the actual arc part time is limited
by
2000000
STA
for acceleration or by
2000000
STB
for
deceleration.
(Example) When STA, STB, and STC are set to 20000,
5000, and 200, respectively, the actual arc
part time is as follows.
Because of
2000000
20000
= 100 [ms] <
200 [ms] , it is limited to 100 [ms].
At time of
acceleration:
100 [ms]
Because of
2000000
5000
= 400 [ms] >
200 [ms]
,
it becomes 200 [ms] as
designed.
At time of
acceleration:
200 [ms]
0 PC03 S-pattern acceleration/deceleration time constant
This is used to smooth start/stop of the servo motor.
Set the time of the arc part for S-pattern
acceleration/deceleration.
Set the same value as for MR-J2S-_A_.
0 S
T
14 Torque command time constant
This is used to set the constant of a primary delay to the
torque command.
TQC: Torque command time constant
0 PC04 Torque command time constant
This is used to set the constant of a primary delay to
the torque command.
Set the same value as for MR-J2S-_A_.
0 T
15 Station number setting
Specifies the station No. of serial communication.
Always set one station to one axis of the servo amplifier.
Setting one station number to two or more stations will
disable a normal communication.
0 PC20 Station number setting
Used to set the station No. of the servo amplifier.
Setting range: 0 to 31
0 P
S
T
Torque
Torque command
After filtering
TQC TQC Time
STA
STC
STC
STB
STC STC
0r/min
Speed
command
S
e
rvo
mo
to
r
sp
e
ed
time