Operating principle

When automatic mode is activated, the system checks whether an energy storage unit has been configured to be connectable and is connected. If it is configured to be connectable but is not connected, the operating mode connects the energy storage unit autonomously. The DC link is then charged to the parameterized Target charge level (50100.28) and the voltage is maintained at this value. Recharging is performed with the parameterized Target charge limit (parameter 50100.29).

The following variants are permitted:

• A connectable energy storage unit has been parameterized. In this case, the energy storage unit is automatically connected before operational readiness is established.
• A permanently connected energy storage unit is parameterized.
• No energy storage unit is parameterized.