A method for realizing disconnection and reconnection in the communication process of opc protocol

Abstract

The invention provides a method for realizing broken line reconnection in a communication process of an OPC (OLE for Process Control) protocol. The method comprises the following steps: firstly, detecting to acquire processing of communication abnormality; secondly, detecting to acquire recovery processing of communication normality. According to the method provided by the invention, when retransmission is needed when an Ethernet port line breaking or the communication abnormality occurs in the communication process of the OPC, a log is uploaded to a firewall management end, and an operator is informed of opening an OPC agent function, OPC communication connection is maintained, and recovery condition of communication is constantly detected; when communication is recovered, necessary data check and recovery are carried out, and the OPC communication connection is enabled to automatically recover to be normal. According to the method, a large amount of additional work of an operator is reduced, time-consuming configuration and restart of OPC services and reconnection of the OPC communication are prevented, the operation capacity of industrial equipment is improved, and the output level of the equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of deep protection of industrial firewalls, and in particular relates to a method for realizing disconnection and reconnection during OPC protocol communication. Background technique [0002] The OPC protocol is widely used in the industrial control environment. As the most common method for the database to obtain production data, many OPC interface software will freeze or reconnect when the protocol communication is interrupted. The response time is too long, which seriously affects the timeliness and reliability of production data transmission. ease of use. At present, there is no disconnection reconnection for the OPC communication protocol in the industrial protection wall. It only prompts when the communication is abnormal. The operator can only reconfigure the parameters required by the OPC service and restart the OPC service for reconnection and communication. [0003] When the firewall detects a dis...

AI Technical Summary

Problems solved by technology

[0009] There are obvious shortcomings in the existing technology: after the firewall detects a disconnection or abnormality, it simply uploads the abnormality to the firewall management client in the form of a log. After receiving the alarm log, the operator needs to check in turn whether there is a Hardware failure and re-starting OPC services manually, reconfiguring OPC manually, not only increases the workload of personnel, but also causes OPC communication to be interrupted for a long time due to restarting and reconfiguring OPC services, affecting normal industrial production and monitoring

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