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MODBUS/TCP Protocol
Detailed Description
The Server Engine of the MODBUS/TCP slave protocol is implemented in the class MbusTcpSlaveProtocol.
It provides functions to start-up and to execute the server engine. This server engine can handle multiple master connections and is implemented as a single threaded TCP server. Upon receipt of a valid master query the server engine calls Data Provider methods to exchange data with the user application. For a more detailed description which Modbus data and control functions have been implemented in the server engine see section Server Functions common to all Protocol Flavours.
- Note:
- If the configured TCP port is below IPPORT_RESERVED (usually 1024), the process has to run with root privilege! This applies if you are using the default MODBUS/TCP port 502.
See section The MODBUS/TCP Protocol for some background information about MODBUS/TCP.
See section Using MODBUS/TCP Protocol for an example how to use the MbusTcpSlaveProtocol class.
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