Nidec COMMANDER S100 - Page 69

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Commander S100 User Guide 69
P2.05 S-Ramp Percentage
Range: 0.00 to 50.0 % Default: 0.0
An S-ramp allows for a smooth change in acceleration. To enable S-ramps, set this parameter to specify the percentage of the ramp time to include
an S-ramp profile.
If the S-ramp has been enabled and Stopping Mode Selector (P2.04) = Distance (5), the distance stop function will be disabled and the drive will
ramp to stop with the S-ramp enabled
It should be noted that as this parameter is increased, the time to ramp to maximum frequency does not change, instead the maximum acceleration
rate in the centre of the profile increases which causes a steeper linear portion at the centre of the profile.
Figure 7-4 S-Ramp set-up
P2.06 Acceleration Rate 1
Range: 0.1 to 1999.9 s Default: 5.0
Defines the acceleration time from 0 Hz to the Maximum Frequency Limit (P2.02). An acceleration rate applies when the frequency is changing
away from 0 Hz.
P2.07 Deceleration Rate 1
Range: 0.1 to 1999.9 s Default: 10.0
Defines the deceleration time from the maximum frequency limit to 0 Hz. A deceleration rate applies when the frequency is changing towards 0 Hz.
The drive may increase the ramp time due to the D.C. bus voltage controller, see Deceleration Ramp Type (P2.11).
P2.08 Acceleration Rate 2
Range: 0.1 to 1999.9 s Default: 5.0
See Acceleration Rate 1 (P2.06).
P2.09 Deceleration Rate 2
Range: 0.1 to 1999.9 s Default: 10.0
See Deceleration Rate 1 (P2.07).
P2.10 Ramp Rate Selector
Range: 0 to 2 Default: 0
Selects between ramp rates 1 or 2.
T
Ramp
T
S
Frequency (Hz)
S-Ramp set-up
T
S
= T
Ramp
x S Ramp Percentage (P2.05) / 100
Maximum
Frequency
P2.02
0
T
S
Time (s)
Value Description
0
The digital input function Ramp Select (12) is used to select between acceleration / deceleration rates 1 and 2, for more information
see Menu 6 IO Configuration. This function can be selected for any of the digital inputs. If the digital input is inactive or if the function
has not been configured, Acceleration Rate 1 (P2.06) and Deceleration Rate 1 (P2.07) are used by the ramp system.
1
Acceleration Rate 1 (P2.06) and Deceleration Rate 1 (P2.07) are used by the ramp system.
2
Acceleration Rate 2 (P2.08) and Deceleration Rate 2 (P2.09) are used by the ramp system.