6-6
Acceleration/Deceleration Time Set-
tings
6-6-1
Acceleration/Deceleration Time Setting
• Set the motor acceleration/deceleration time.
• The set time here is the acceleration/deceleration time from 0 Hz to the maximum output frequency.
The actual acceleration/deceleration time varies depending on the frequency reference value.
• This parameter is for setting the time constant of the primary delay filter with respect to the output
frequency during acceleration/deceleration when V/f control (3004Hex-2BHex/3009Hex-0FHex = 0
to 3) is selected. Set this parameter when an overshoot or undershoot occurs when the frequency
arrives at the target frequency or the rotation of the motor stops and this causes mechanical prob-
lems. Setting a large value stabilizes the output frequency but worsens response.
3004Hex-04Hex/
3009Hex-02Hex
3004Hex-18Hex/
3009Hex-0DHex
3004Hex-08Hex/
3005Hex-0BHex
3004Hex-09Hex/
3005Hex-0CHex
Output frequency
Frequency Reference
Time
Maximum Output
Frequency
Starting Frequency
RUN command
FW input
Actual
acceleration
time
Actual
deceleration
time
Stop Frequency
3004Hex-1AHex/
3009Hex-40Hex
Parameter No. Function name Data
Default da-
ta
Unit
3004Hex-08Hex/
3005Hex-0BHex
1st Acceleration Time 1 /
2nd Acceleration Time 1
*1
0.00 to 6000 6.00 s
3004Hex-09Hex/
3005Hex-0CHex
1st Deceleration T
ime 1 /
2nd Deceleration T
ime 1
*1
0.00 to 6000 6.00 s
3014Hex-57Hex
Acc/Dec Output Frequen-
cy Filter
0.000 to 5.000 0.000
s
*1. To enable switching to the 1st and 2nd control, allocate “12: SET (2nd control)” to either of input terminal
[DI1] to [DI7].
When a short deceleration time is set, the regenerative amount that is fed back at deceleration in-
creases. When the regenerative amount exceeds the allowable capacity of the inverter, either the de-
celeration time is extended by the setting of Anti-regenerative Control Function Selection
(3008Hex-46Hex), or overvoltage (alarm code: 7) is detected. To shorten the deceleration time, use
the regenerative braking function. For details on the regenerative braking function, refer to 6-12-1 Re-
generative Braking Function on page 6-67.
6 Basic Settings
6-33
M1 Series EtherCAT Type User’s Manual (I670)
6-6 Acceleration/Deceleration Time Settings
6
6-6-1 Acceleration/Deceleration Time Setting
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