Engineers often encounter the following problem: why can’t my touch screen communicate with the PLC? For example, here are two common issues: 1. Weintek Touch Screen and Siemens PLC Cannot Communicate, Always Prompting PLC No Response. How Should I Set It Up? Solution Approach: You need to set the same baud rate, the same data … Read more
Despite the fact that dozens of industrial field bus protocols are still in use in the field of machine automation, industrial Ethernet is replacing many of these protocols with its superior characteristics. In earlier years, there were some basic open communication serial standards, such as RS232 and RS422/485. These standards, including Modbus, became the foundation … Read more
Hello everyone, I am Da Yi! Today we will talk about a very practical topic: UART-485 communication. This technology allows microcontrollers and PLCs to communicate wirelessly, just like two people conveniently chatting via video call on their phones. Have you ever wondered how mobile phones achieve wireless communication? Let’s start with an example from our … Read more
👨💻 Technical Sharing by Dayi Unveiling SPI Interface: High-Speed Data Transmission Between MCU and PLC Hello everyone, I am Dayi. Today I am bringing you a high-speed data transmission interface used in microcontrollers and PLCs—SPI. This interface is widely used in embedded systems and automation control, not only for its fast transmission rate but also … Read more
Dear friends, I am Dayi Zong, and today I bring you a practical technology article about the I2C bus. I2C is a simple and widely used serial communication protocol, which can be seen in both microcontroller and PLC fields. So what makes it unique? Let’s start with practical application cases. I2C Bus Introduction I2C stands … Read more
Hello everyone, I am Da Yi! Today we will talk about the application of Digital Signal Processing (DSP) in microcontrollers and PLCs. What is Digital Signal Processing? In modern industrial automation systems, we often encounter analog signals from sensors, such as temperature, pressure, light, etc. In order for a microcontroller (MCU) or PLC to recognize … Read more
PLC Makes Microcontroller Programming More Professional! Hello everyone, today I want to talk about the relationship between PLC and microcontrollers. Many friends might think these are two completely different fields, but that’s not the case. The programming mindset of PLC can help us write more stable and industrial-grade microcontroller programs. From Relay to PLC Programming … Read more
1. Real-Time Showdown: Data Dissection on the Millisecond Battlefield In a real-world measurement of a certain new energy vehicle welding line in 2023, the deterministic scanning cycle of the Siemens S7-1500 PLC stabilized at 0.5ms±0.02ms, while the STM32H7 series microcontroller equipped with FreeRTOS had a fluctuation range of 3ms to 15ms (when triggered by burst … Read more
50 Classic Q&A About Siemens S7-300 PLC 1: How to Avoid “Communication Error” Message When Using CPU 315F and ET 200S? When using CPU S7 315F, ET 200S, and safety-related DI/DO modules, you will call the safety program in OB35. Moreover, you have accepted all the default monitoring time values and are willing to receive … Read more
Wireless Remote Control and Adjustment Network Using S7-300 PLC When the distance between multiple control points is very far, and they are remote and scattered, such as water source wells, valves, and water level monitoring in urban water supply and hydraulic departments, these devices are spread over dozens or even hundreds of square kilometers. To … Read more