MODBUS APPLICATION PROTOCOL SPECIFICATION V1
April 26, 2012 1/50 MODBUS APPLICATION PROTOCOL SPECIFICATION CONTENTS 1 Introduction ........................................ ........................................ ...................................... 2 Scope of this document ........................................ ........................................ ........... 2 2 Abbreviations ........................................ ........................................ ................................... 2 3 Context ........................................ ........................................ ........................................ ..... 3 4 General description ........................................ ........................................ .......................... 3 PROTOCOL description.
PDU Protocol Data Unit PLC Programmable Logic Controller TCP Transmission Control Protocol 3 Context The MODBUS protocol allows an easy communication within all types of network architectures. Figure 2: Example of MODBUS Network Architecture Every type of devices (PLC, HMI, Control Panel, Driver, Motion control, I/O Device…) can use
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