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SUN2000-(30KTL-A, 33KTL, 40KTL)
User Manual
5 Electrical Connections
Issue 04 (2016-06-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
60
Figure 5-26
Communication mode for multiple SUN2000s
For the SUN2000 at the end of the chain, on the
Comm. Param.
screen of the SUN2000 APP, set
Match Resistance
to
Connect
to turn on the switch of the build-out resistor so that the build-out
resistor is enabled (see the
SUN2000 APP User Manual
for details).
The RS485 communication distance between the SUN2000 at the end of the daisy chain and the
SmartLogger cannot exceed 1000 meters.
If multiple SUN2000s need to communicate with one another and are connected to a PC over the
SmartLogger1000, a maximum of three daisy chains can be configured to support up to 80 devices.
It is recommended that the number of devices on each daisy chain be less than 30.
If multiple SUN2000s need to communicate with one another and are connected to a PC over the
SmartLogger2000, a maximum of six daisy chains can be configured to support up to 200 devices.
To ensure the system response speed, it is recommended that the number of devices on each daisy
chain be less than 30. Each SmartLogger2000 can connect to a maximum of 80 SUN2000s.
PLC
The PLC communication board loads communication signals onto power cables for
transmission. For details about how to install the PLC, see the
PLC CCO01A User Manual
or
SmartLogger2000 User Manual
.
The built-in PLC module in the SUN2000 does not require cable connections.
5.5.2 Selecting a Communication Mode
Communication modes for the inverters with PLC and those without PLC are different. Select
an appropriate communication mode based on the actual situation.
The inverters with a PLC support both PLC and RS485 communication modes. The
RS485 and PLC communication modes are mutually exclusive.
−
When selecting the PLC communication mode, do not connect the RS485
communications cable.
−
When selecting the RS485 communication mode, do not connect the PLC CCO
modules to the AC power cables.
The inverters without PLC only support the RS485 communication mode.
5.5.3 Connecting RS485 Communications Cables
Connect the SUN2000 to communications equipment (such as the SmartLogger and PC)
using RS485 communications cables.