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S-Curve Speed Command Acceleration/Deceleration:
Set Sn205=3 to enable the use of S-Curve speed command ac/deceleration function.
Parameter Name Default Unit Setting range Control mode
Sn208
S-Curve speed command
accel/decel time setting
1 msec 1~1000 S
Sn209
S-Curve speed command
acceleration time setting
200 msec 0~5000 S
Sn210
S-Curve speed command
deceleration time setting
200 msec 0~5000 S
In applications where normal acceleration/deceleration on ramp up or ramp down bring in vibration of the
mechanical system. S- curve acceleration/deceleration parameters could help to reduce vibration as
diagram below:
Speed Command (rpm)
Time (ms)
ts
ts
ta
ts
ts
td
ts=Sn208
ta=Sn209
td=Sn210
Caution! Setting Rule:
s
a
t
t
2
，
s
d
t
t
2
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