9 Operation
SMA Solar Technology AG
Operating manual
SB55-LV-JP-41-BE-en-13
55
• Enter the SMA Grid Guard code and select [
Login
].
6. Expand the parameter group that contains the parameter which is to be configured.
7. Change the desired parameters.
8. Select [
Save all
] to save the changes.
☑ The inverter parameters are set.
Accepting the settings
Saving the made settings is indicated by an hourglass symbol on the user interface. If the DC
voltage is sufficient, the data is transferred directly to the inverter and accepted. If the DC
voltage is too low (e. g. in the evening), the settings are saved, but they cannot be directly
transferred to or accepted by the inverter. As long as the inverter has not yet received and
accepted the settings, the hourglass symbol will continue to be displayed on the user interface.
The settings will be accepted when there is sufficient DC voltage applied and the inverter
restarts. As soon as the hourglass symbol appears on the user interface, the settings have been
saved. The settings will not be lost. You can log off of the user interface and leave the system.
9.11 Configuring the Modbus Function
If a Remote Output Control Device is installed in the system and an active connection is established
between the Remote Output Control Device and the inverter, the Modbus interface of the inverter is
automatically enabled and the communication ports 502 are set. Changes to the Modbus
configuration may cause the communication between the Remote Output Control Device and the
inverter not to function properly.
If there is no active connection established to a Remote Output Control Device, the Modbus
interface is disabled and the communication ports 502 are set. If you want to use the Modbus
interface, the Modbus interface must be enabled. After activating the interface, the communication
ports of both IP protocols can be changed. For information on commissioning and configuration of
the Modbus interface, see the technical information "SMA and SunSpec Modbus® Interface" at
www.SMA-Solar.com..
For information on which Modbus registers are supported, see the technical information "Modbus®
parameters and measured values" at www.SMA-Solar.com.
Measures for data security during activated Modbus interface
If you activate the Modbus interface, there is a risk that unauthorized users may access and
manipulate the data or devices in your PV system.
To ensure data security, take appropriate protective measures such as:
• Set up a firewall.
• Close unnecessary network ports.
• Only enable remote access via VPN tunnel.
• Do not set up port forwarding at the communication port in use.
• In order to deactivate the Modbus interface, reset the inverter to the default settings or
deactivate the activated parameter again.
