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
Essential! PLC Program Version Management and Documentation Standards for Clear and Controllable Projects! Do you remember the first time I faced that large filling line renovation project? At three in the morning, the production line was down, the client was standing behind me, and I was desperately comparing three different versions of the PLC program, … Read more
Programming Recommendations 1. When a PLC and a host computer (or touch screen) form a monitoring system, it is often necessary to have control modes such as “Manual” and “Automatic” on the screen (generally, only one can be active at a time). In the program, you can use the “MOV” instruction. For example: when “Manual” … Read more
