Selecting A Communication Mode; Connecting Rs485 Communications Cables - Huawei SUN2000-33KTL User Manual

SUN2000-(33KTL, 40KTL)
User Manual
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.

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.
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5.5.3 Connecting RS485 Communications Cables

Connect the SUN2000 to communications equipment (such as the SmartLogger and PC)
using RS485 communications cables.
Context
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Issue 03 (2015-12-01)
Figure 5-21 Communication mode for multiple SUN2000s
 For the SUN2000 at the end of the chain, on the Comm. Param. screen of the SUN2000 application,
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 chain and the
SmartLogger cannot exceed 1000 meters.
 If multiple SUN2000-33KTL/40KTLs need to communicate with one another and are connected to a
PC over the SmartLogger, 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.
The built-in PLC module in the SUN2000 does not need to be connected with cables.
The inverters with PLC support both PLC and RS485 communication modes.
The RS485 and PLC communication modes cannot be used at the same time. You can select only one
mode.
 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.
Connect an RS485 communications cable.
RS485 communications cables can be connected in two ways:
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