If the overvoltage suppression function is used in elevator type applications, there is a risk of rollback and falls. Set L3-11 = 0 [Overvoltage Suppression Select = Disabled].
The overvoltage suppression function is designed to prevent an overvoltage trip in a situation in which a braking resistor is not used with a regenerative load. If the overvoltage suppression function is enabled, the regeneration torque reference within the drive is automatically controlled during regeneration.
Note:
When using the drive for applications such as high speed elevators with a speed of 2 ms or more and direct drive elevators, or when you need drives designed for cranes, contact Yaskawa or your Yaskawa sales representative.