Individual drive (not coupled through the DC Link circuit) - The circuit starts to
respond at a DC Link voltage of 400V, 720V or 840V (depending on the supply
voltage). If the energy fed back from the servo motor is higher than the preset
Regen power, then the drive issues a "Regen power exceeded" signal and the
Regen circuit will be switched off. Upon the next internal check of the DC Link
voltage, an overvoltage will be detected, the fault relay contact will be opened
and the drive will be switched off with the error message "Overvoltage".

Multiple drives (coupled through the DC Link circuit) - In this case, the Regen
energy is distributed equally among all the drives.