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6.5 Configuring the ModbusFunction
The Modbus interface is deactivated by default and the communication ports 502 set. In order to
access SMA invertes with SMA Modbus
®
or SunSpec
®
Modbus
®
, the Modbus interface must be
activated. 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Modbus® Interface" or in the Technical Information "SunSpec® Modbus®
Interface" at www.SMA-Solar.com.
For information on which Modbus registers are supported, see the Technical Descriptions "SMA
Modbus® Interface" or "SunSpec® Modbus® Interface" at www.SMA-Solar.com.
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.
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 default settings.
Procedure:
Activate the Modbus interface and adjust the communication ports if necessary (see the
Technical Information "SMAModbus® Interface" or "SunSpec® Modbus® Interface" at
www.SMA-Solar.com).
6.6 Setting SMA OptiTrac Global Peak
For partially shaded PV modules, you should set the interval at which the inverter is to optimize the
MPP of the PV system. If you do not want to use SMAOptiTracGlobalPeak feature, you can
deactivate the feature.
The basic procedure for changing operating parameters is explained in another section (see
Section6.1 "Changing Operating Parameters", page30).
Procedure:
Select the parameter Cycle time of the OptiTrac Global Peak algorithm or
MPPShdw.CycTms and set the required time interval. The ideal time interval is usually six
minutes. This value should only be increased if the shading situation changes extremely slowly.
The inverter optimizes the MPP of the PV system at the predetermined time interval.
In order to deactivate the SMAOptiTracGlobalPeak feature, select the parameter OptiTrac
Global Peak switched on or set MPPShdw.IsOn to Off.
6 Configuration of the Inverter
SMA Solar Technology America LLC
User Manual 33SB30-77-1SP-US-40-BA-en-11
33


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