Transcription of MODBUS APPLICATION PROTOCOL SPECIFICATION V1
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MODBUS -IDA December 28, 2006 1/51 MODBUS APPLICATION PROTOCOL SPECIFICATION CONTENTS 1 Introduction ..2 Scope of this document ..2 2 Abbreviations ..2 3 Context .. 3 4 General description.
Ethernet II /802.3 EIA/TIA-232 or EIA/TIA-485 Master / Slave Physical layer MODBUS+ / HDLC Other Other ... PLC Programmable Logic Controller TCP Transport Control Protocol 3 Context ... The function code alone specifies the action.
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