1. Importance of Data Types In PLC programming, data types are like the foundation of a building, determining how data is stored, its range of values, and the rules for operations. Only by accurately grasping data types can we ensure precise data storage, efficient transmission, and correct calculations, thus ensuring the stable operation of the … Read more
Hello everyone, I am Fan Hua. Today, let’s talk about the common mistakes in PLC programming that often trouble beginners. Whether you are a newbie just starting out, or an experienced practitioner, this article will surely provide you with some insights. After all, on the road of automation, who hasn’t stepped into a few pitfalls? … Read more
Introduction This article is part of a series that includes “What is PLC?” and “Working Modes, Execution Operations, and Principles of Mitsubishi PLC” (click the blue text to view previous articles). Together, these three articles explain the basic knowledge of PLC. This article mainly discusses the classification of PLC, expansion options, programming languages, and performance … Read more
1 PLC (Programmable Logic Controller) application techniques can help improve system reliability, efficiency, and ease of maintenance. Here are some PLC application techniques: Optimize Input/Output Design: Minimize unnecessary input/output points to reduce system complexity and cost. For critical input/output points, use redundant design to improve system reliability. Use appropriate isolation techniques, such as optical isolation, … Read more
[Image] Creating content is not easy. If convenient, please consider following. This article is based on a rigorous review of relevant authoritative literature and materials, forming a professional and reliable content. All data in the article is verifiable and traceable. Special statement: Data and materials have been authorized. The content of this article does not … Read more
Apache HttpClient – The Java Network Request Courier Hello everyone, I am Niu Ge, transitioning from testing to Java! Today, we are going to talk about the “courier” in Java – Apache HttpClient. I still remember the first project I took on after transitioning, which required calling several external APIs. At that time, I was … Read more
Hello everyone, I amAms, Today I will talk about theTCP/IPThree-Way Handshake and Four-Way Teardown Process Analysis A virtual connection is established through a three-way handshake. 1. (Client) > [SYN] > (Server)IfClientandServerare communicating. WhenClientwants to communicate withServer,Clientfirst sends aSYN (Synchronize)marked packet toServerto request a connection.Note: A SYNpacket is a TCP packet with only the SYN flag … Read more
11.7 Modbus TCP Programming and Experimentation This course does not support sensors that use the Modbus TCP protocol, so we will write two programs: ① modbus_server_tcp.c: Simulate a Modbus TCP sensor ② modbus_client_tcp.c: Operate the sensor The program structure is shown in the figure below: No special connections are required on the hardware. The source … Read more
To communicate with other devices in a PLC, the MODBUS function library is definitely the most commonly used. Let me share my experiences and some tips from my work~ As the “universal solution” in the field of industrial automation, the MODBUS library allows our PLC to communicate with other devices that support the MODBUS protocol. … Read more
Previously, I shared a document-based tutorial on creating an SPI Flash programming algorithm. However, feedback from users indicated that it was not very convenient to port to other microcontrollers. This post is created to facilitate the migration to various platforms. Application scenarios for the SPI Flash programming algorithm: 1. In an IDE environment, such as … Read more