Specification and Implementation Guide for MODBUS over ...

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MODBUS over serial line Specification and Implementation Guide MODBUS over Serial Line Specification and Implementation Guide 1/44. Dec 20, 2006. MODBUS over serial line Specification and Implementation Guide Contents 1 Introduction ........................................ ......................................4. Scope of this document ........................................ ..................... 4. Protocol 5. Conventions ........................................ ....................................... 5. Compliance ........................................ ........................................ 6. 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.

Dec 20, 2006 · 1.0 Nov 02 Creation. This document comprises a description of Master / slave protocol and of the two different transmission modes ( RTU, ASCII). The main features of the physical layer ( RS485, RS232) and some recommendations are provided. Implementation classes are proposed to guide the implementation.

  Specification, Physical, Early, Physical layer