Technical information

8 – THEORY OF OPERATION
Acceleration Control
126
Changing Ramp Profiles The selected ramp profile may be changed during starting by changing the Ramp Select input. When
the Ramp Select input changes during ramping, control switches to the other profile as if it were
already in progress. It does not switch to the beginning of the other profile. Refer to the following
example below:
Note: Once the motor has achieved an up-to-speed status (UTS), changes to the Ramp Select input
have no effect on the motor operation.
Figure 22 – Ramp Select Change During Start
Ramp Profile 1
Ramp Profile 2
Initial Current 2
Kick Level 1
Maximum Current
2
Initial Current 1
Maximum Current 1
Kick Time 1
Ramp Time 2
Ramp Time 1
Ramp Select Changed During Start
Ramp 1 Selected Ramp 2 Selected
Kick Level 2
Kick Time 2
Ramp Time 2