SMA DATA MANAGER M Operating Manual page 15

SMA Solar Technology AG
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).
DHCP Server is recommended
The DCHP server automatically assigns the appropriate network settings to your nodes in the
local network. A manual network configuration is therefore not necessary. In a local network,
the Internet router is usually the DHCP server. If the IP addresses in the local network are to be
assigned dynamically, DHCP must be activated in the Internet router (see the Internet router
manual). In order to receive the same IP address by the internet router after a restart, set the
MAC address binding.
In networks where no DHCP server is active, proper IP addresses must be assigned from the
free address pool of the network segment to all network participants to be integrated during
commissioning.
IP addresses of Modbus devices
In systems with Modbus devices, static IP addresses must be assigned to all Modbus devices.
Suitable IP addresses can be assigned to the Modbus devices from the free address supply of
the network segment either manually or dynamically via DHCP.
If the IP addresses are to be assigned dynamically, DHCP must be activated in the Internet
router (see the Internet router manual). Make sure that the Modbus devices do not contain
variable IP addresses but always the same IP addresses (static DHCP).
This also applies to Data Managers that are used as subordinate devices.
If IP addresses of Modbus devices have been changed, all devices must be restarted.
Communication disturbances in the local network
The IP address range 192.168.12.0 to 192.168.12.255 is occupied for communication
amongst SMA products and for direct access to SMA products.
Communication problems might occur if this IP address range is used in the local network.
• Do not use the IP address range 192.168.12.0 to 192.168.12.255 in the local network.
Operating manual
NOTICE
EDMM-20-BE-en-10
2 Safety
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