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
Descriptions "SMA Modbus® Interface" or in the Technical Descriptions "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 Descriptions "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 29).
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
SB5.0-6.0-1SP-US-40-BA-en-10
32
