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A method of communicating with multi-plc based on opc

A technology for communication and establishment of communication, applied in transmission systems, electrical components, etc., can solve problems such as the inability of multi-vendor equipment to be integrated at the same time

Active Publication Date: 2021-11-16
INSPUR COMMON SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical task of the present invention is to provide an OPC-based method for communicating with multiple PLCs to solve the problem that multi-vendor equipment cannot be integrated into Web development software at the same time

Method used

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  • A method of communicating with multi-plc based on opc
  • A method of communicating with multi-plc based on opc
  • A method of communicating with multi-plc based on opc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] The method for communicating with multiple PLCs based on OPC of the present invention uses Java language to write a client, uses OPC standard service as a server, establishes a communication connection with PLC remote equipment through I / O (DLL), sends instructions, and responds to The returned results are analyzed; the client configuration program Class Id, OPC branch Server prefix, program independent control variables and PLC corresponding Item objects are written in Java language, and the client is written in Java language through Utagrd or JeasyOpc, relying on RPC services and COM / DCOM ports terminal communicates with the OPC server; as attached figure 1 shown, the specific steps are as follows:

[0042] S1. Use the PLC corresponding OPC service software to register all the use points in the PLC for the OPC service;

[0043] S2. Create a JAVA project or create a new OPC interface package in an existing project;

[0044] S3. Introduce Utgard, use Utgard to connect...

Embodiment 2

[0069] as attached figure 2 As shown, by applying the present invention to a valley cooler, the temperature of the valley cooler can be controlled, including the temperature of the supply air and the temperature of the front air, and the timing can be controlled at the same time.

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Abstract

The invention discloses an OPC-based method for communicating with multiple PLCs, which belongs to the field of docking software and hardware. The technical problem to be solved by the invention is that multi-vendor equipment cannot be integrated into the Web development software at the same time. The adopted technical solution is: the Methods By using the Java language to write the client, using the OPC standard service as the server, establishing a communication connection with the PLC remote device through I / O, sending instructions, and analyzing the returned results; writing the client configuration program Class Id and OPC in the Java language Branch Server prefix, program independent control variables and PLC corresponding Item object, through Utagrd or JeasyOpc, rely on RPC service and COM / DCOM port to realize the communication between the client written in Java language and the OPC server.

Description

technical field [0001] The invention relates to the field of software and hardware docking, in particular to a method for communicating with multiple PLCs based on OPC. Background technique [0002] OPC is a hardware communication standard. Based on OPC, unified docking of different hardware for different manufacturers can be realized. [0003] Java is one of the most widely used languages ​​in the market. Using the Java language can make the program use cross-platform and improve the use efficiency. [0004] In order to access the data information of the field device, each application software developer needs to write a dedicated interface function. Due to the wide variety of field devices and the continuous upgrading of products, it often brings a huge workload to users and software developers. Usually this can not meet the actual needs of the work, system integrators and developers urgently need a process control method with high efficiency, reliability, openness and in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
CPCH04L67/34
Inventor 孙希涛曹雪韬张强
Owner INSPUR COMMON SOFTWARE