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5-13 Soft Start
5
Operating Functions
5-13 Soft Start
Function
• This function accelerates and decelerates the Servomotor in the set acceleration and deceleration
times.
• You can set the acceleration and deceleration independently of each other using the trapezoidal
acceleration and deceleration curve.
• The soft start processes speed command input (REF) or internally set speed control switching to
reduce impact during acceleration and deceleration.
• This function is effective for simple positioning and speed switching operations.
• Do not use this function for a position controller with an acceleration/deceleration function.
Parameters Requiring Settings
• If the soft start function is not used, set this parameter to 0 (default setting).
• The actual acceleration and deceleration time is as follows:
Parameter
No.
Parameter name Explanation Reference page
Pn58
Soft Start
Acceleration Time
Set the time using the following formula.
Setting = Acceleration time (setting × 2 ms) from 0 r/min to
1,000 r/min.
5-83
Pn59
Soft Start
Deceleration Time
Set the time using the following formula.
Setting = Deceleration time (setting × 2 ms) from 1,000
r/min to 0 r/min.
5-83
ta td
ta = Pn58 × 2 ms/(1000 r/min)
td = Pn59 × 2 ms/(1000 r/min)
Speed command
Speed
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