Allen-Bradley PowerFlex 525 User Manual page 101

A439 [S Curve %]
Enables a fixed shape S-Curve that is applied to the acceleration and deceleration ramps (including jog).
S-Curve Time = (Accel or Decel Time) x (S-Curve Setting in percentage)
100% S-Curve
Target
vel
S-Curve Time = Accel Time
Total Time to Accelerate = Accel Time + S-Curve Time
Values Default:
Min/Max:
Display:
A440 [PWM Frequency]
Sets the carrier frequency for the PWM output waveform. The chart below provides derating guidelines based on the PWM frequency setting.
100
96
92
4
0
76
72
6
64
60
56
50
1 2 3 4 5 6 7
Carrier Frequency (kHz)
Ignoring derating guidelines can cause reduced drive performance. The drive may automatically reduce the PWM carrier frequency at low output speeds,
IMPORTANT
unless prevented from doing so by A540 [Var PWM Disable].
Values Default:
Min/Max:
Display:
A441 [Droop Hertz@ FLA]
Reduces the frequency based on current. This frequency is subtracted from the commanded output frequency. Generally Slip and Droop would not both be used, but if both are enabled
they simply subtract from each other. Typically used in load sharing schemes.
Values Default:
Min/Max:
Display:
Advanced Program Group (continued)
Target
vel
Target
vel/2
S-Curve Time
Total Time to Accelerate = Accel Time + S-Curve Time
0%
0/100%
1%
9 10 11 12 13 14 15 16
4.0 kHz
2.0/16.0 kHz
0.1 kHz
0.0 Hz
0.0/10.0 Hz
0.1 Hz
Rockwell Automation Publication 520-UM001A-EN-E - February 2013
50% S-Curve
Programming and Parameters
Example:
Accel Time = 10 s
S-Curve Setting = 30%
S-Curve Time = 10 x 0.3 = 3 s
Related Parameter(s):
Chapter 3
A540
101