For engineers who have been exposed to PLC programming, concepts such as self-locking, interlocking, and mutual locking are certainly familiar. These are typical foundational elements in PLC programming and are core skills that must be mastered. Next, we will introduce several classic small program examples. 1. Self-Locking (Start-Stop Control) The PLC control circuit for self-locking … Read more
Introduction: Why Basic Control is the “Gateway” to Learning PLC Metaphorically referred to as the “nerve center of industrial automation,” PLCs raise the question, “Why do 90% of PLC beginners get stuck at the first step?” This resonates with readers. PLCs are widely used in production lines, machine tools, smart homes, and other fields, while … Read more
Detailed Safety Control Solutions for Hazardous Materials Production Using Siemens PLC In hazardous materials production workshops, the reliability of the safety control system directly relates to personnel and property safety. This article will introduce a safety control solution based on the Siemens S7-1200 PLC, focusing on how to construct a stable and reliable safety control … Read more
With the development of computer technology, railway interlocking has been upgraded, leading to the emergence of computer interlocking. The difference between computer interlocking devices and the 6502 electrical interlocking is the addition of a driver acquisition circuit, which delegates the interlocking computation tasks to the computer. Regarding the driver circuit, the figure shows the station … Read more
The computer interlocking system ensures train safety under various complex situations through strict logical operations. It is a core device for improving station throughput and operational efficiency. Therefore, understanding the principles, skilled operation, and emergency handling are crucial for personnel engaged in railway traffic signal systems. The Jiegang High-Tech Computer Interlocking Training System is designed … Read more