EXPERT Standard Series User Manual
108
then directly track the current speed and direction of the motor, perform smooth start
without impact on the motor that is still rotating.
When this start mode is selected, it is required to consider the rotation inertia of the
system, and increase the parameter set values of the add-subtract time as appropriate.
Figure 6-7 Schematic Diagram of Speed Tracking Restart
This method is suitable for the instantaneous restart after power failure of large inertia
loads where the motor rotates forward or backward when the drive stops. When this
method is used, correctly set the motor rated current F3.02.
LED tens digit: Speed tracking mode
0: This method is usually selected when tracking down from the frequency at power
failure.
1: Tracking down from the maximum frequency, usually used for generating loads