6
-18
Switching Acceleration and Deceleration Time Automatically
Use this setting when you want to switch acceleration/deceleration time automatically using the output fre-
quency.
When the output frequency reaches the set value in C1-11, the Inverter switches the acceleration/deceleration
time automatically as shown in the following diagram.
Set C1-11 to a value other than 0.0 Hz. If C1-11 is set to 0.0 Hz, the function will be disabled.
Fig 6.18 Acceleration/deceleration Time Switching Frequency
Entering S-curve Characteristics in the Acceleration and Deceleration Time
By performing acceleration using an S-curve pattern, you can reduce shock when starting the machine.
By using the SYSDRIVE PV inverter, you can set an S-curve characteristic time for each of the following: At
acceleration start and at acceleration end.
For deceleration start and deceleration end the S-curve characteristic times are fixed to 0.2 sec. They can not
be switched off or changed.
When S-curve is set, calculate acceleration/deceleration time as follows:
Acceleration time = Selected acceleration time + (Acceleration start time S-curve characteristic time +
Acceleration end time S-curve characteristic time) / 2
Output frequency
Acceleration/decele-
ration time switching
frequency (C1-11)
C1-03 rate
C1-01 rate
C1-02 rate
C1-04 rate
When output frequency
≥
C1-11, acceleration and deceleration are performed using
Acceleration/deceleration Time 1 (C1-01, C1-02).
When output frequency < C1-11, acceleration and deceleration are performed using
Acceleration/deceleration Time 2 (C1-03, C1-04).
INFO
