Ramp times
The frequency setpoint is internally guided via a ramp generator. The acceleration time and the deceleration time are independently adjustable.
Details
–
The acceleration time set in 0x2917 (P220.00) refers to an acceleration from
standstill to the maximum frequency set in 0x2916 (P211.00). At a low setpoint selection,
the real acceleration time decreases accordingly.
standstill to the maximum frequency set in 0x2916 (P211.00). At a low setpoint selection,
the real acceleration time decreases accordingly.
–
The deceleration time set in 0x2918 (P221.00) refers to the deceleration of the set
maximum frequency to standstill. In case of a lower actual frequency,
the actual deceleration time is reduced accordingly.
maximum frequency to standstill. In case of a lower actual frequency,
the actual deceleration time is reduced accordingly.
Parameter
|
Address
|
Name / setting range / [default setting]
|
Information
|
|
|
0x2917
(P220.00)
|
Acceleration time 1
(Accelerat.time 1)
0.0 ... [5.0] ... 3600.0 s
|
Acceleration time 1 for the operating mode "MS: Velocity mode".
–
The acceleration time set refers to the acceleration from standstill to the maximum frequency set. In the case of a lower setpoint selection, the actual acceleration time is reduced accordingly.
–
Setting is not effective in the operating mode 0x6060 (P301.00) = "CiA: Velocity mode (vl) [2]".
|
|
|
0x2918
(P221.00)
|
Deceleration time 1
(Decelerat.time 1)
0.0 ... [5.0] ... 3600.0 s
|
Deceleration time 1 for the operating mode "MS: Velocity mode".
–
The deceleration time set refers to the deceleration from the maximum frequency set to standstill. In the case of a lower actual frequency, the actual deceleration time is reduced accordingly.
–
Setting is not effective in the operating mode 0x6060 (P301.00) = "CiA: Velocity mode (vl) [2]".
|
|
|
0x291C
(P225.00)
|
Quick stop deceleration time
(QSP dec. time)
0.0 ... [1.0] ... 3600.0 s
|
Quick stop deceleration time for the operating mode "MS: Velocity mode".
–
If the "Quick stop" function is activated, the motor is brought to a standstill within the deceleration time set here.
–
The deceleration time set refers to the deceleration from the maximum frequency set to standstill. In the case of a lower actual frequency, the actual deceleration time is reduced accordingly.
–
Setting is not effective in the operating mode 0x6060 (P301.00) = "CiA: Velocity mode (vl) [2]".
|
|
|
0x291E:001
(P226.01)
|
S-Ramp characteristic: Smoothing factor
(S-ramp char.: Smoothing factor)
0.0 ... [0.0] ... 100.0 %
|
Factor for S-rounding of the acceleration/deceleration ramps.
–
With the setting "0.0", the S-rounding is deactivated and acceleration/deceleration with linear ramps is carried out.
–
The smoothing factor increases the ramp time as follows:
50 % --> 1.5 x configured ramp time 100 % --> 2 x configured ramp time |
|
Example: Quick stopExample for operating mode
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Parameter
|
Name
|
Setting for this example
|
|
Enable inverter
|
Constant TRUE [1]
|
|
|
Run
|
Digital input 1 [11]
|
|
|
Minimum frequency
|
15 Hz
|
|
|
Maximum frequency
|
40 Hz
|
|
|
Acceleration time 1
|
4 s
|
|
|
Deceleration time 1
|
3 s
|
|
①
|
After start command, the motor is accelerated to the minimum frequency. This is also the case if the setpoint selection is = 0 Hz. If the setpoint exceeds the minimum frequency, the ramp generator follows the setpoint.
|
|
②
|
If the start command is deactivated again, the motor is stopped with the stop method set in 0x2838:003 (P203.03) (here: Standard ramp).
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③
|
The motor is accelerated to the set maximum frequency.
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④
|
If the setpoint falls below the minimum frequency, it is decelerated up to the minimum frequency.
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⑤
|
In case of a sign reversal of the setpoint, a change of direction of rotation takes place, the minimum and maximum frequency, however, continue to apply.
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