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ANR-LAN Modbus TCP/IP Protocol Manual

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This instruction manual provides a technical overview of the Modbus TCP/IP protocol as implemented in the ANR-LAN device, explaining how Modbus RTU is encapsulated within Ethernet TCP/IP frames. It details the Modbus Application Protocol (MBAP) header structure, client/server communication model, function codes, register types, and exception handling for industrial networking applications.

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