SMA DATA MANAGER M - Speedwire Encryption of the System Communication

8 Operation
SMA Solar Technology AG
Operating manual EDMM-10-BE-en-27 51
In systems with a superordinate and subordinate SystemManagers, all subordinate
SystemManagers must first be commissioned to be able to integrate them into the system of the
superordinate SystemManager. To subsequently use a SystemManager or a superordinate
SystemManager as a subordinate SystemManager, the product must be reset to the default
settings.
System Manager
Select the option SystemManager in the installation assistant if you use the DataManager as a
stand-alone device without other subordinate DataManagers for open-loop or closed-loop control
of your system.
Superordinate System Manager
Select the option Superordinate systemmanager in the installation assistant if you use the
DataManager as a superordinate device with other subordinate DataManagers for open-loop or
closed-loop control of your system. With this option, the superordinate DataManager forwards the
open-loop or closed-loop control commands to the subordinate DataManager via Modbus. For
this, subordinate DataManagers must be integrated as Modbus devices into the system of the
superordinate DataManager. Meters at the grid-connection point must be connected to the
superordinate DataManager. The Modbus server must be activated in the superordinate
DataManager.
Subordinate System Manager
Select the option Subordinate systemmanager in the installation assistant if you want to use the
DataManager as subordinate device. With this option, the subordinate DataManager receives the
open-loop and closed-loop control commands of a superordinate device. These commands are
forwarded as open-loop control commands to the connected devices. In systems with a
superordinate DataManager, all subordinate SystemManagers must first be commissioned to be
able to integrate them into the system of the superordinate DataManager. To do this, select the
operating mode Control and the signal source Modbus for the subordinate DataManager.
8.7 Speedwire Encryption of the System Communication
Speedwire encryption is used to encrypt system communication between all compatible Speedwire
devices. In order to be able to use the Speedwire encryption in the system, all connected
Speedwire devices, apart from the SMA Energy Meter, must support the SMA Speedwire
Encrypted Communication function.
Speedwire encryption for systems with one Data Manager
In systems with more than one Data Manager, there can be overlaps in the system encryption.
• Only enable the Speedwire encryption in systems with one Data Manager.
Requirements:
☐ All devices in the local network must be in operation and connected to the product via an
Internet router.
☐ All devices must support the Speedwire encryption.