Modbus Tcp Gateway Functionality; Role Of The Sunspec Adapter Software - ABB VSN300 Product Manual

7 - Operation
M
odbus TCP Gateway Functionality
The Modbus TCP Gateway functionality allows an external monitoring
or a SCADA system to exchange data with the inverter without being
directly connected.
Communication with the SCADA or external monitoring system must
take place through the Modbus TCP protocol. The VSN300 board server
/ gateway converts the Modbus commands which arrive and sends them
to the inverter (or to any device within which the board is installed). In
turn, the responses generated by the inverter will be converted and sent
to the Modbus client which has sent the commands.
R
ole of the Sunspec Adapter software
Integration of the VSN300 in a SCADA system is made possible mainly
thanks to the Modbus TCP communication protocol and the presence of
the SunSpec Adapter software.
The SunSpec Adapter is a software adapter that has two main functions:
it continuously polls legacy ABB inverters as fast as it can using the Au-
rora Protocol and caches data polled from these inverters in SunSpec
compliant Modbus data maps.
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