6. Description of Parameters
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6.3.3 Acceleration/Deceleration Time and S-curve Setting
Acceleration time indicates time required by the AC drive to accelerate from 0 Hz to acceleration/
deceleration time base frequency (F0-25).
Deceleration time indicates time required by the AC drive to decelerate from acceleration/
deceleration time base frequency (F0-25) to 0 Hz.
Figure 6-35 Acceleration/Deceleration time
Time (t)
Output frequency (Hz)
Frequency reference
Accel./decel. time
base frequency
t1
t2
Set accel. time
Set decel. time
Actual accel. time
Actual decel. time
The AC drive provides totally four groups of acceleration/deceleration time for selection. You can
perform switchover by using a DI terminal.
● Group 1: F0-17, F0-18
● Group 2: F8-03, F8-04
● Group 3: F8-05, F8-06
● Group 4: F8-07, F8-08
For example, select DI7 and DI8 for switchover.
Related function parameters are set as follows:
Function Code Parameter Name Setting Function Description
F4-06
DI7 function selection 16 Terminal 1 for acceleration/deceleration
time selection
F4-07
DI8 function selection 17 Terminal 2 for acceleration/deceleration
time selection
Two terminals for acceleration/deceleration time selection have four state combinations, as listed
in the following table.
Terminal 2 Terminal 1 Accel/Decel Time Selection Corresponding Pr.
OFF OFF Accel/Decel time 1 F0-17, F0-18
OFF ON Accel/Decel time 2 F8-03, F8-04
ON OFF Accel/Decel time 3 F8-05, F8-06
ON ON Accel/Decel time 4 F8-07, F8-08
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