Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 188

5. PARAMETERS
No./ Setting
symbol/name digit
PT51 This enables to start/stop the servo motor or linear servo motor smoothly.
STC Set the time of the arc part for S-pattern acceleration/deceleration.
S-pattern Setting "0" will make it linear acceleration/deceleration.
acceleration/d
eceleration
time constant
Rated speed
Preset speed
Servo motor
speed
Long setting of STA ([Pr. PT49 Acceleration time constant]) or STB ([Pr. PT50
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 setting will be
disabled at home position return.
The upper limit value of the actual arc part time is limited by
2000000
(Example) At the setting of STA 20000, STB 5000 and STC 200, the actual arc part
Setting range: 0 to 5000
Acceleration time
constant
0 [r/min]
Ta
Ta + STC
Profile mode
When 1000 ms or more value is set, it will be clamped to 1000 ms. The setting will
be disabled at home position return.
Specify STA ([Pr. PT49 Acceleration time constant]) and STB ([Pr. PT50
Deceleration time constant]) with "Profile acceleration (6083h)" and "Profile
deceleration (6084h)".
This function will be enabled in the profile position mode and profile velocity mode.
To enable it, cycle the power after setting.
for acceleration or by
STA
times are as follows.
During acceleration: 100 ms
2000000
= 100 [ms] < 200 [ms]
20000
Therefore, it will be limited to 100 [ms].
During deceleration: 200 ms
2000000
= 400 [ms] > 200 [ms]
5000
Therefore, it will be 200 [ms] as you set.
Function
Deceleration time
constant
Tb + STC
Tb
2000000
for deceleration.
STB
5 - 67
Initial
value
[unit]
0
[ms]
Ta: Time until preset
speed is reached
Tb: Time until stop