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.
• The transmission mode ( RTU vs ASCII modes) The following sections describes the state diagrams of a master and a slave that are independent of transmission modes used. The RTU and ASCII transmission modes are specified in next chapters using two state diagrams. The reception and the sending of a frame are described. Syntax of state diagram :
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