Intelligent management apparatus and management method for distributed control network based on CAN bus

Abstract

This invention relates to an intelligent management apparatus and management method for distributed control network based on CAN bus. Wherein, the CAN bus interface unit receives communication message on the bus to convert the differential voltage level into the digital logic level for filter, conversion and scheduling, sends the processed data to the data conversion unit and PCI bus control unit for data exchange to complete the communication with superior control machine; applying the software functional module in ARM chip for network communication, performance detection, fault diagnosis, data management, and protocol conversion. This invention improves whole network real-time feature and fit to industrial control field.

Description

technical field [0001] The invention belongs to the field of industrial automation control, and in particular relates to a communication management device of a distributed control network based on a CAN field bus of a controller area network and an interconnection management method between subnets. Background technique [0002] CAN bus is a serial data communication bus developed to solve the data exchange between control and test instruments in modern automobiles. CAN bus technology has high real-time and reliability, and has been widely used in industrial sites. However, with the continuous complexity of the control network structure used by the CAN bus and the increase of the system scale, the CAN bus itself lacks support for high-level network protocols, so it is not perfect in the detection, diagnosis and management of the communication network. There are also many difficulties in the interconnection between homogeneous and heterogeneous control sub-networks. [0003]...

AI Technical Summary

Problems solved by technology

[0005] The technical idea of ​​realizing the purpose of the present invention is: break the situation that previous products only passively monitor the CAN bus network communication, introduce network quality service technology to supplement the CAN bus communication protocol, dynamically adjust the node priority, manage the network communication, solve Transient network communication congestion and soft faults of some nodes; through the self-test of the nodes and the bus, the communication status of the bus is detected and the type of network fault is judged; in terms of data communication, the network management device passes the data conversion unit and the PCI bus The control unit realizes the communication connection with the upper PC, and the operator can conveniently rely on the upper PC to set the parameters of the network management device, visually view the detection data of the lower management device, and finally realize the dynamic communication management of the CAN bus network Scheduling and Quality Inspection

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