Fallback Behavior

If communication fails for a specific time, either the last communicated values are kept or predefined fallback values are taken. This function is referred to as fallback behavior (fallback). Interruptions in the communication are shown via notifications in Sunny Portal if the system is registered in Sunny Portal. Fallback times should be set at a ratio of 1:3. For example, for the cyclical sending of remote signals of 10 s, a fallback time of 30 s should be set. Fallback values (in watt) must be set in accordance with the grid operator's specifications. As soon as communication is restored, it automatically switches to the previous operating mode.

Fallback behavior in the event of communication failure to the digital inputs

This fallback behavior occurs when invalid or non-configured signals are received at the digital inputs (internal or external). When using temporary pulse signals at the digital inputs, no fallback values may be defined. Pulse signals are impulses of a ripple control receiver that are only present for 1 s to 1.5 s. These pulse signals can only be analyzed when directly connected to the Data Manager. When using external I/O systems, this is not possible.

Fallback behavior in the event of communication failure to the energy meter at the point of interconnection

This fallback behavior occurs when the communication to the energy meter at the point of interconnection is interrupted. In the event of an interruption in communication, there is a switchover from closed-loop to open-loop control mode. This ensures that any curtailment is passed on directly to the connected inverters, even if self-consumption is then no longer taken into account. The fallback behavior is enabled by default and cannot be disabled.