Transcription of Specification and Implementation Guide for MODBUS over ...
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MODBUS over serial line Specification and Implementation Guide 1/44 12/02/02 MODBUS over Serial Line Specification & Implementation Guide MODBUS over serial line Specification and Implementation Guide 2/44 12/02/02 Contents 1 Introduction .. 4 Scope of this document .. 4 Protocol 5 Conventions .. 5 Compliance .. 6 Glossary .. 6 2 MODBUS Data Link Layer .. 7 MODBUS Master / Slaves protocol 7 MODBUS Addressing 8 MODBUS frame 8 Master / Slaves State 9 The two serial Transmission 12 Error Checking Methods.
LT Line Termination. MODBUS Device a Device that implements MODBUS over Serial Line and respects this Technical Note. RS232 EIA/ TIA -232 Standard. RS485 EIA/ TIA -485 Standard. RS485-MODBUS A 2W-or 4W-Network in accordance with this Technical Note. Transceiver a Transmitter and a Receiver (or Driver and Receiver).
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