Mitsubishi Electric MELSERVO-J3 Series Manual page 70

Part 2: Review on Replacement of MR-J3-_A_ with MR-J4-_A_
MR-J3-_A_
No.
Name and function
PC03 S-pattern acceleration/deceleration time constant
Used to smooth start/stop of the servo motor.
Set the time of the arc part for S-pattern
acceleration/deceleration.
Speed command
0r/min
STA
STC
STA: Acceleration time constant (parameter No.PC01)
STB: Deceleration time constant (parameter No.PC02)
STC: S-pattern acceleration/deceleration time constant
(parameter No.PC03)
Long setting of STA (acceleration time constant) or
STB (deceleration time constant) may produce an
error in the time of the arc part for the setting of the
S-pattern acceleration/deceleration time constant.
The upper limit value of the actual arc part time is limited by
2000000
for acceleration or by
STA
At the setting of STA 20000, STB 5000 and STC 200,
(Example)
the actual arc part times are as follows.
During acceleration: 100[ms]
During deceleration: 200[ms]
PC04
Torque command time constant
Used to set the constant of a low-pass filter in
response to the torque command.
Torque command
Torque
TQC
TQC: Torque command time constant
Initial
value
Time
STC STB STC
STC
2000000
for deceleration.
STB
Limited to 100[ms] since
2000000
100[ms] 200[ms].
20000
200[ms] as set since
2000000
400[ms] 200[ms].
5000
After
filtered
TQC Time
No.
Name and function
0 PC03
Same as MR-J3
S-pattern acceleration/deceleration time constant
Start/stop the servo motor or linear servo motor
smoothly.
Set the time of the arc part for S-pattern
acceleration/deceleration.
Speed command
0 r/min
(0 mm/s)
STC
STA
STA: Acceleration time constant ([Pr. PC01])
STB: Deceleration time constant ([Pr. PC02])
STC: S-pattern acceleration/deceleration time
constant ([Pr. PC03])
Long setting of STA (acceleration time constant) or
STB (deceleration time constant) may produce an
error in the time of the arc part for the setting of the
S-pattern acceleration/deceleration time constant.
The upper limit value of the actual arc part time is
limited by
2000000
for acceleration or by
STA
deceleration.
(Example) At the setting of STA 20000, STB 5000
and STC 200, the actual arc part times
are as follows.
Acceleration: 100 ms
2000000
20000
Therefore, it will be limited to 100 ms.
Deceleration: 200 ms
2000000
Therefore, it will be 200 ms as you
set.
Setting range: 0 to 5000
0 PC04
Same as MR-J3
Torque command time constant
Set the constant of a primary delay filter to the
torque command.
Torque command (Thrust command)
Torque
(Thrust)
TQC
TQC: Torque
Setting range: 0 to 50000
2 - 41
MR-J4-_A_
Time
STC STC STC
STB
2000000
for
STB
= 100 [ms] < 200 [ms]
= 400 [ms] > 200 [ms]
5000
After filtering
Time
TQC
Control
Initial
mode
value
0 S
T
0 T