2 Safety
SMA Solar Technology AG
Technical Information 7SMAModbus-ennexOS-TI-en-10
NOTICE
Manipulation of system data in networks
You can connect the supported SMA products to the Internet. When connected to the Internet, there is a risk that
unauthorized users can access and manipulate the data of your system.
• Set up a firewall.
• Close unnecessary network ports.
• If absolutely necessary, only enable remote access via a virtual private network (VPN).
• Do not use the port forwarding feature. This also applies to the used Modbus ports.
• Disconnect system components from other network components (network segmentation).
Access to data points after activating the Modbus interface
The read-only access to data points is possible after activating the Modbus interface. The write-only access to all
designated data points is possible. All parameter changes are shown on the user interface of the SMA product.
• Ensure that the Modbus interface is still active after resetting the SMA product to default settings.
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