modbus官方标准规范

Modbus_Application_Protocol_V1_1b3.pdf This document is the Modbus application protocol V1.1b3. It describes the function codes used within the framework of MODBUS transactions. MB-TCP-Security-v36_2021-07-30.pdf The Modbus Security protocol provides protection through the blending of Transport Layer Security (TLS) with the traditional Modbus protocol. TLS encapsulates Modbus packets to provide authentication and message-integrity protection. The new protocol also leverages X.509v3 digital certificates for authentication of the Server and Client. The new Modbus Security protocol uses port 802. Modbus_over_serial_line_V1_02.pdf Please use this for new MODBUS implementations. Modbus_Messaging_Implementation_Guide_V1_0b.pdf The MODBUS Messaging Implementation Guide version 1.0b was provided by Schneider Automation. The objective of this document is to provide reference information for software developers implementing the MODBUS messaging service. This document gives an accurate and comprehensive description of a MODBUS messaging service implementation. Its purpose is to facilitate interoperability between devices using the MODBUS messaging service. The encoding for all MODBUS function codes is not described in this document. For this information please refer to the MODBUS application protocol specification. The MODBUS Messaging Implementation Guide contains three parts: Overview of MODBUS over TCP/IP Functional description of a MODBUS client, server and gateway implementation MODBUS implementation example that proposes the object model Object_Messaging_Protocol_ExtensionsVers1.1.doc An object messaging protocol for use with Modbus TCP, used as a component in the SEMI sensor bus Network Communication Standard (NCS).