Rs485 And Plc Communication Connection - SOLIS -100K-5G Installation And Operation Manual

4. Comm. & Monitoring
There are 5 communication terminals on the inverters.
COM1 is a 4-pin connector reserved for WiFi/Cellular datalogger.
COM2 - COM3 are used for RS485 communication between inverters.
Both RJ45 and terminal block are provided for use.
COM4 or COM5 can be used for DRM connection.
Detailed connection please refer to 4.2 section.

4.1 RS485 and PLC communication connection

Monitoring system for multiple inverters
Multiple inverters can be monitored through RS-485 daisy chain configuration.
PV Strings
Inverter
PV Strings
Inverter
PV Strings
Inverter
Figure . Multiple inverter monitoring system 4 1
NOTE
One of the RS485 and PLC communication methods is available.
For the models with additional PLC communication, switching between PLC
communication and RS485 communication can be realized by flipping the switch
on the communication board as indicated in figure 4.2. Only one communication
method is available during operating. Standard model without PLC communication
doesn't have this switch.
.26.
PC monitoring
Datalogger
Internet
DC
RS485
(RS485)
4. Comm. & Monitoring
Figure . Switch between PLC and RS485 4 2
WARNING
Must power off the inverter on both AC and DC before switch the
communication method.
PLC is available for multiple inverter monitoring.
Inverter
PV Strings
PV Strings
Inverter
PV Strings Inverter
PV Strings Inverter
Figure . Multiple inverter monitoring system 4 3
PLC CCO
Datalogger
Transformer Grid
DC
AC
RS485
PLC
(PLC)
.27.