You may have a lot of materials at hand, but if you cannot apply them, they do not belong to you. To achieve the same functionality, different people write different PLC programs. We can learn by examining others’ PLCs. This is the comment section of the PLC. A good PLC has a well-defined system functionality, … Read more
Click the blue text above to follow us01IntroductionImagine you have 100 drawers (like the small compartments stacked in your wardrobe), each containing a number—this could be the quantity of parts on a production line or inventory data in a warehouse. Now, you need to sum these 100 numbers and place the result in the 101st … Read more
1. Design Requirements for PLC ProgramsPLC A complete PLC program is not just about making the system operational; it also requires comprehensive comments, a well-structured architecture, good scalability, a complete alarm protection system, and a simulation system before operation. 1. Simplicity Keep the PLC program as simple as possible. Simplicity means using standardized program frameworks … Read more
“Engineer Wang, please come to the workshop! This new equipment has broken down again. Xiao Li has been troubleshooting for over half an hour, checked the program eight hundred times, but still can’t find the problem!” The voice on the other end was Production Director Lao Zhang, nearly frantic. I put down my teacup and … Read more
1 Camel Case Naming Convention Naming Objects This primarily targets identifiers, including variables, PLC variables, PLC data types, and structures. Naming Rules: 1. The first letter is a lowercase letter; 2. If an identifier consists of multiple words, the first letter of subsequent words is capitalized; 3. No separators are allowed. 2 Pascal Case Naming … Read more
Many beginners, after learning the basic instructions, still do not know where to start when faced with a real project. Today, we will outline a standardized process for a complete PLC project from scratch. Mastering this process will allow you to work methodically like an experienced engineer. Step 1: Deeply Understand Control Requirements (Sharpening the … Read more
A newcomer wrote the one-button start/stop in 60 lines, causing the CPU scan cycle to spike to 12 ms. The boss slammed the table, asking if this program could be sold? Today, I will break down the 9 most commonly used “one-button start/stop” instructions using three real ladder diagrams—same button, same motor, but some can … Read more
Understanding constants and their use in PLC programming is crucial for professionals working with S7 controllers. This article will provide you with the necessary knowledge and skills to utilize constants in PLC programs according to your needs. As a practitioner aiming for proficiency, you should learn about the types of constants to enhance program readability … Read more
Click the blue text above to follow us01IntroductionIn the world of PLC programming, addresses are like the “house numbers” of devices. In traditional programming, these “house numbers” are often hard-coded. Imagine having to write nearly identical control logic for 10 identical motors just because their addresses are different; or when a production line needs to … Read more
YOUTH DAY When programming a PLC, both beginners and experienced engineers can make the following basic errors.Because these errors are non-syntax related, they cannot be detected by programming software.Once this error occurs, it can be difficult to identify until the system is tested, at which point the controlled device fails to operate or stops at … Read more