FX5U: Beginner’s Guide to Mitsubishi PLC and Practical Modbus Communication Imagine you have just taken over an automation renovation project, with five frequency converters standing like silent soldiers waiting for orders. An operator points to the flashing screen in the control room and asks, “Can the data from these devices be displayed in real-time?” Don’t … Read more
1. Overview of SPI Communication SPI (Serial Peripheral Interface) is a synchronous serial communication protocol developed by Motorola (now NXP), primarily used for short-distance, high-speed communication between master and slave devices. Its features include full-duplex transmission, master-slave architecture, and no complex protocol layers, making it widely used in embedded devices such as memory (e.g., Flash), … Read more
Click the aboveblue text to follow us The I2C bus, as a widely used communication protocol in embedded systems, has its stability and reliability directly affecting the overall performance of the system. An I2C deadlock refers to a situation where the bus is stuck and unable to continue communication, usually caused by a slave device … Read more
In scenarios such as industrial automation, building control, and energy monitoring, RS-485 serial communication is widely used for data transmission between devices due to itslong-distance transmission capability, strong anti-interference ability, and support for multi-node communication. Especially in a master-slave structure, RS-485 is an ideal choice for achieving centralized control and distributed sensing. However, during actual … Read more
The connection method for the barcode scanner and Mitsubishi Q series PLC using RS-232C communication (without protocol) will be illustrated as an example. 1 Devices Used 2 Connection Method 3 Configuration of Keyence Barcode Reader 4 Configuration of Mitsubishi Electric PLC Q Series 5 Creating and Transmitting Ladder Diagram Program 6 Execution of Ladder Diagram Program and Monitoring of … Read more
In the years of factory automation, I have seen too many beginners complicate simple issues. Today, let’s talk about PLC input and output. Many people think it’s simple at first glance, but there are numerous cases of failure when actually implementing it. Just the other day, I visited a paper factory where the so-called engineer … Read more
MESSAGE QUEUING TELEMETRY TRANSPORTWhat is the “MQTT” Protocol? MQTT (Message Queuing Telemetry Transport) is a standard (ISO/IEC PRF 20922) based on the publish-subscribe paradigm. It operates on top of the TCP/IP protocol and is designed for remote devices with limited hardware capabilities and poor network conditions, making it a publish/subscribe messaging protocol that is lightweight, … Read more
Introduction: The “Telephone System” of Industrial Energy Meters Imagine hundreds of energy meters in a factory like silent soldiers, and you have no way of knowing their real-time data—this information black hole is something every engineer has experienced. Today, we will reveal in simple terms how to build an “industrial telephone system” using the S7-200 … Read more
Integrating Wireless Communication Modules: Practical Guide to Connecting Microcontrollers with Bluetooth Modules In modern electronic projects, wireless communication has become an indispensable part, and Bluetooth modules are a popular choice for wireless communication due to their low power consumption, low cost, and ease of use. This article will focus on the integration of microcontrollers with … Read more
Click the blue text for more exciting information I have been in the PLC industry for nearly 20 years, working on the front lines. To be honest, seeing those freshly graduated young people programming makes me laugh. They hold onto a pile of theories talking about control algorithms, yet they can’t even understand a simple … Read more