About Modbus RTU Server Communications
The Modbus RTU Server Communications option supports a multi-drop configuration with the Modbus RTU Server Communications enabler functioning as a server. In effect, the Modbus RTU Server Communications enabler presents the CIMPLICITY Points as if they were data values from one or more Modbus RTU Server devices.
The CIMPLICITY Points are mapped to Modbus Addresses, allowing a Modbus Client to obtain Point Values as if they were coils or registers on a server device.
SystemLink uses the Modbus RTU Server feature to enable CIMPLICITY to collect point values over the Internet using the Modbus protocol. The node that is set up as the Modbus Client can collect data from the Modbus Server nodes via the Internet.