Have you ever wondered why PLCs are so expensive (compared to control boards developed using STM32)? Why do they have such strong anti-interference capabilities? And why are they so stable?Today, let’s discuss these questions together, mainly from a hardware perspective!First, let’s take a look at the internal stacking structure of a PLC, as shown below:Generally … Read more
In PLC programming, we often encounter some specialized English vocabulary, which can be somewhat difficult for beginners to understand. This article summarizes some commonly used PLC technical English terms and provides translations. Terms Starting with ‘A’ absolute 绝对位置 Absolute output 绝对最大输出 actuator Actuator against 对比 allocate 分配 alter Change/Modify ambient Ambient ambient operating temperature analog … Read more
This software can be used to write PLC programs in languages such as LAD and SFC, calling internal components like cylinders and motors, and simulating real actions through PLC program I/O mapping.The image below shows an electrical schematic diagram of a Siemens LOGO input terminal connected to a button and an output terminal connected to … Read more
In the field of industrial automation, the journey from an ordinary electrician to a senior PLC engineer is a career path filled with challenges and opportunities. Today, we will analyze the various stages of this promotion path, the required skills, and salary levels, providing a reference guide for those striving on this path. Stage 1: … Read more
1. Project Background and Requirements In industrial automation scenarios, the Siemens S7-1200 PLC often needs to achieve remote monitoring, data collection, or control command issuance. However, traditional wired communication has issues such as complex wiring, poor scalability, and limitations in mobile scenarios. This solution utilizes Guangzhou Jukong’s 4G/5G wireless communication products to implement wireless data … Read more
Abstract: Siemens and Mitsubishi are the two most representative PLC brands in the field of automation, and their differences go far beyond the hardware itself, delving deeper into programming philosophies and ecosystems. This article will deeply compare the design philosophies of the two from multiple dimensions such as programming software, program structure, and instruction applications, … Read more
Click the blue text to follow usWith the rapid development of industrial automation, PLC (Programmable Logic Controller) control cabinets have been applied to various production equipment. However, the energy consumption of PLC control cabinets during operation has gradually become a topic of discussion. Reducing energy consumption can effectively lower production costs and contribute to environmental … Read more
Previously, I introduced the concept of dual coils due to the PLC scanning cycle. Regarding this scanning cycle, I have found that many friends, when starting to write programs, often see no issues with the program, and the PLC shows no errors or alarms, yet the results are incorrect. This is likely due to the … Read more
In intermittent production scenarios (such as material dryers and timed conveyor lines), it is often required for motors to operate in a cycle of “running for 2 hours, stopping for 2 hours.” Today, we will use the Siemens S7-200 SMART PLC to teach you step-by-step how to achieve this functionality, making it easy for beginners … Read more
Today we continue to review the history of PLCs and the evolution of industrial automation. For the first part, see: The History of PLCs and the Evolution of Industrial Automation (Part One). Part Two: Siemens entered this field in 1976 with the launch of a product called S3. Prior to this, Germany had used an … Read more