When I first learned about PLCs, I found terms like “instructions” and “logic” to be quite abstract. It wasn’t until I started working on a marquee light program—watching the indicator lights illuminate step by step according to my written program—that I suddenly understood how to use timers and shift instructions. In fact, the marquee light … Read more
1. Why should the S7-200 PLC use the PC/PPI interface? The S7-200 CPU uses RS485, while the COM port of the PC uses RS232. The electrical specifications of the two are not compatible, requiring an intermediate circuit for matching. The PC/PPI is essentially an RS485/RS232 matching cable. 2. What are the advantages of transistor output … Read more
When starting with PLC ladder diagram programming, it is essential to follow certain rules and develop good habits.Below, we will take the Mitsubishi FX series PLC as an example to introduce the methods of PLC ladder diagram programming, hoping to be helpful to everyone.
Hello everyone, I am Xiao Chen. In industrial automation, the accuracy of analog signal acquisition directly affects the stability of the entire control system and product quality. However, many users often struggle with signal drift issues when using Mitsubishi FX series PLCs for analog signal acquisition. Today, I will share several practical anti-interference solutions that … Read more