Fallback Behavior - SMA DATA MANAGER M Operating Manual

8 Operation
5. Select [Display parameters].
6. For the parameter ActPowSpeedEna set the value 100.

8.13 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.
Fallback behavior in reactive power mode
The fallback behaviors for reactive power mode can be set more detailed than for active power
mode (see technical information "SMA GRID GUARD 10.0 - Grid Management Services via
Inverter and System Controller" at www.SMA-Solar.com).
56 EDMM-10-BE-en-27
SMA Solar Technology AG
Operating manual