In the world of PLC (Programmable Logic Controller) programming, repetitive work is the enemy of efficiency. Imagine having to write code from scratch every time you encounter a similar control task; this not only wastes time but also increases the likelihood of errors. The reuse of FB (Function Block) and FC (Function) blocks acts like … Read more
A good PLC program typically needs to possess the following characteristics: simplicity, readability, correctness, reliability, ease of modification, extensibility, a complete alarm system, and convenient program simulation. Although these characteristics may manifest differently across various industries and processes, their core ideas remain the same. Today, we will discuss PLC programming standards! 1. Simplicity Make the … Read more
Click “Industrial Control Lao Xu” to follow me Introduction “Why does my PLC program crash while running?” “Clearly the logic is fine, but the output signals are jumping around?” PLC programming may seem simple, but beginners (and even experienced engineers) often fall into pitfalls due to some detail issues. This article summarizes the ten most … Read more
Do you remember that project that kept me awake all night? A packaging production line, with the client pushing hard for results. I thought to myself, this is just a simple conveyor control, I can jump right in and write the program. But what happened? I spent three whole days debugging, with problems popping up … Read more
The International Electrotechnical Commission (IEC) standard IEC 61131-3 defines five main PLC programming languages, each suitable for different types of control tasks and program complexities. Below is a detailed analysis of how PLC multilingual programming adapts to complex programs. 1. The Five Programming Languages Defined by IEC 61131-3 1. Ladder Diagram (LD) • Characteristics: A … Read more
Introduction Last week, the new electrical engineer at the company was frustrated again. Faced with a production line failure, he stared blankly at the PLC ladder diagram on his computer screen for half an hour, finally admitting with a red face: “I don’t understand this logic…” This was already the third time this month. The … Read more
PLC Programming in the Automotive Industry: The Quality Management System Behind the Prohibition of M/T The automation systems on automotive manufacturing production lines have extremely high reliability requirements; a small programming error can lead to the entire production line shutting down, resulting in significant economic losses. A common guideline in automotive industry PLC programming standards … Read more
At the end of this article, there are 55 practical case materials. Introduction: When we learnPLC programming, why does it take us much longer to develop programs than others? It could be due to our unfamiliarity with the software or not using the right methods. The following programming and debugging methods can significantly improve our … Read more
However, the rural ferry, originally not frequented by many pedestrians, is now completely deserted. Therefore, even the ferryman is absent, and all that can be seen is the empty ferry floating freely, indifferent and leisurely. The water is swift and the boat is horizontal; since the ferry is in the countryside, there are no visitors. … Read more
In chemical production, reactor temperature control directly affects product quality and production safety. Today, we will discuss in detail how to build a precise and reliable temperature control system using Siemens PLC. 1. Hardware Configuration 1.1 PLC Selection and Module Configuration Main Unit Selection: S7-1500 CPU 1515-2 PN (with dual Ethernet ports) Analog Input Module: … Read more