Data communication coding method

Abstract

This invention relates to a data communication coding method used in radio communication and site bus communication transmission, in which, the transmission format protocol includes: OxAA, Ox55, a module kind of a receiving unit, the internal relative number, data packet length and ciphered algorithm numbers of the receiving unit, the model kind of the transmission unit, the internal relative number of the module kind of the transmission unit, the internal device control port number of the order-executing module / the key assignments kind internal number of a panel module device, the kind number of the order-executing module, the action instruction number, parameter number, parameter sequence number, slice numbers of the parameter of its standard instruction, sequence number of the action instruction of the standard instruction, content of the parameter data, a check code, OxFF and OxFF, in which, the OxAA and Ox55 are two starting identifying bytes of an instruction packet and the OxFF and OxFF are two ending identifying bytes of the instruction packet.

Description

technical field [0001] The invention relates to a data communication encoding method in the field of industrial data bus and wireless communication. Background technique [0002] Fieldbus is an industrial data bus that has developed rapidly in recent years. It mainly solves the digital communication between field devices such as intelligent instruments and meters, controllers, and actuators on the industrial scene, as well as the communication between these field control devices and advanced control systems. The problem of information transmission, so the field bus is not only a communication network, but also an automatic control network. [0003] At present, the encoding for communication on the field bus basically adopts a fixed format, strictly the length of each command, and an extremely rigorous encoding method, and more importantly, each manufacturer establishes its own different format and content according to its own equipment requirements. , when transmitting, it ...

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Problems solved by technology

[0003] At present, the encoding for communication on the field bus basically adopts a fixed format, strictly the length of each command, and an extremely rigorous encoding method, and more importantly, each manufacturer establishes its own different format and content according to its own equipment requirements. , when transmitting, it is difficult to meet the requirements of flexible use. Some unchanged values ​​or states must be repeatedly transmitted meaninglessly, wasting a lot of network resources, and some data may be affected by the environment or device performance. When the data size is inconsistent, it is difficult to achieve good communication; the biggest defect is that the original fieldbus communication coding method is difficult to meet the intercommunication and mutual control requirements of today's large number of information appliances

[0004] This method of communication coding brings great inconvenience to our scalability, and even the expression of ultra-high temperature and ultra-low temperature also brings troubles. At the same time, because the product function requirements of each developer are different, the format is varied, so Bring great obstacles to the compatibility and interoperability of our products

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