Tag: opc

Java reads OPC DA data—Utgard

Java reads OPC DA data-Utgard The Utgard library is outdated and the original author has long deleted the library. It is recommended to use OPC UA, which is compatible with OPC DA. The following explains the use of Utgard Both C# and C++ do not need to configure DCOM and call functions directly. Since you […]

How Node-Red communicates with OPC DA server

1. Introduction This article mainly introduces how Node-Red uses the plug-in node-red-contrib-opc-da and the plug-in node-red-contrib-opcda-client to communicate with the OPC DA server, and uses KEPServer to simulate the server. Environment setup This environment setup requires two machines, in the same LAN: Server Function: Simulate OPC DA server Operating system: Windows 7 Professional Client computer […]

Solve Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigExce

Table of Contents Solve Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.alibaba.alibrain.quotareport.controller.QuotaReportDayController Problem Description solution 1. Check the visibility of a class 2. Exclude final classes 3. Check Spring version 4. Use other proxy modes Summarize Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate […]

NodeJS and CODESYS OPCUA communication

1. Overview This article mainly uses simple examples to demonstrate OPCUA communication between NodeJS and CODESYS PLC. NodeJS serves as OPC UA Client, and CODESYS’s PLC serves as OPC UA Server. The code of NodeJS is just the basic Client code of node-opcua. This article mainly introduces the configuration of the OPCUA Server that comes […]

S7-200smart establishes communication with matlab based on OPC

Table of Contents Introduction to OPC OPC communication between PLC and Matlab S7-PC Access SMART configuration Matlab configuration OPC communication between KingView and matlab OPC Introduction OPC is a protocol that uses Microsoft COM/DCOM technology to achieve automatic control. It adopts a typical CIS mode. The driver for the hardware device is completed by the […]

ESP32 microcontroller and open62541 library: Detailed guide to implement OPC UA communication protocol_C language example

1. Introduction In modern industrial automation and IoT applications, communication protocols play a vital role. OPC UA (Open Platform Communications Unified Architecture) is an open, cross-platform communication protocol that is widely used in Industry 4.0 and IoT projects. This article will detail how to implement OPC UA communication on the ESP32 microcontroller using C language […]

NanoPC-T3 64-bit bare metal programming – startup and running state switching

refer to: https://github.com/metro94/s5p6818_spl https://github.com/trebisky/Fire3/tree/master/Boot_NSIH https://github.com/SamsungARTIK/bl1-artik710 https://github.com/SamsungARTIK/bl1-artik710/blob/artik/nsih-generator/PERIDOT_SYSINFO_Gen_ver03.xls Author: Peng Donglin Email: [email protected] 1. System block diagram It can be seen that the S5P6818 has a total of two clusters, each cluster has 4 Cortex-A53 architecture cores. According to the official manual, each core works at a frequency of no less than 1.4GHz. Each core has its […]

WPF OPCUA read, write and subscribe

WPF OPC reading, writing and subscribing WPF OPC data reading and writing Install OpcUaHelper MainWindow.xaml <Window x:Class=”HSAPP.MainWindow” xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml” xmlns:d=”http://schemas.microsoft.com/expression/blend/2008″ xmlns:mc=”http://schemas.openxmlformats.org/markup-compatibility/2006″ xmlns:local=”clr-namespace:HSAPP” FontSize=”30″ mc:Ignorable=”d” Title=”MainWindow” Height=”450″ Width=”800″> <Grid> <StackPanel> <TextBlock x:Name=”showValueText” Text=”123″></TextBlock> <Button Content=”Connect OPC” Margin=”20″ Click=”ConnectOPCUA”></Button> <Button Content=”Read and write OPC data” Click=”ReadData”></Button> <Button Content=”Read and write OPC data” Click=”ReadData”></Button> </StackPanel> </Grid> </Window> MainWindow.xaml.cs […]

SOPC’s NIOS Ⅱ realizes motor speed PID control

Build a motor control hardware platform through NIOS Ⅱ on the FPGA development board, including motor forward and reverse rotation, encoder reading, and then implement the PID algorithm to control the motor speed through the software part, so that it can be asymptotically set The encoder target value of . 1. PID algorithm The PID […]