Parameter 135

S pattern t12

This parameter determines the pattern grade (1 = low, 2 = medium, 3 = high) of the ramp. The S pattern is used for rounding off the ramp and allows for a soft acceleration of the drive in the event of a setpoint change. The following figure shows the effect of the S pattern:

[1]

Setpoint input

[2]

Speed profile without S pattern

[3]

Speed profile with S pattern

INFORMATION

Once started, an S pattern phase is interrupted if an error occurs with the stop ramp t13.
If the setpoint is reduced or the enable signal is revoked, the started S pattern phase is completed. Thus the drive can accelerate until the end of the S pattern phase despite the setpoint reduction.
The S pattern can only be used with binary control and communication via 2PD. An S pattern is not possible when using communication with 3PD.