1. Overview of MODBUS Communication The MODBUS protocol consists of MODBUS protocol over serial links and MODBUS protocol based on TCP/IP. The serial link MODBUS protocol includes MODBUS ASCII (string) and MODBUS RTU. The MODBUS protocol library provided by 200SMART supports MODBUS RTU communication. MODBUS RTU sends data in hexadecimal values. MODBUS ASCII sends data … Read more
Search on WeChat Technical Training In actual industrial automation applications, various communications are essential, such as PN communication, S7 communication, MODBUS TCP communication, and MODBUS communication, among others; however, the most widely used is MODBUS communication, as it is an open, free, and universal communication protocol. Often, during equipment debugging on the industrial site, communication … Read more
Today, let’s discuss Modbus. Here’s what we’ll cover: 1. Terminology Explanation 2. Background 3. Protocol Principles 4. Transmission Methods 5. Differences Between Modbus RTU and Modbus ASCII 6. Modbus TCP and Its Considerations 7. Function Code Roles 8. Security Analysis of Modbus Protocol 1. Terminology Explanation Checksum The checksum is usually the last digit of … Read more
1. Quick Ways to Learn Modbus 1.1 Register Mnemonics As a beginner, one might find the concepts of the Modbus protocol awkward, repetitive, and hard to distinguish, such as Coil Status, Discrete Input Status, Holding Register, and Input Register. Returning to the essence of the matter, in the field of industrial control PLC, it involves … Read more
Now, let’s explain the application of MODBUS. Currently, most industrial control communication between the upper computer and the lower computer uses the communication protocol MODBUS. It is easy to imagine the importance of communication between machines. 1. MODBUS System Framework Diagram 2. Application of MODBUS The underlying communication of MODBUS uses RS485 signals connected via … Read more
When it comes to communication, many people find it difficult and feel lost. I had the same feeling when I first encountered communication concepts. I gathered a lot of materials, mostly theoretical, and it always felt like I had no starting point. After finally understanding it, I realized that the main reason for not grasping … Read more
Search on WeChat Technical Training Preparation: Hardware: Huichuan AM401 PLC, one USB to RS485 converter. Software: InoProShop (V1.6.2), Serial Assistant, Modbus-RUT slave simulator. Serial Debugging Process: 1. Program the PLC. 2. Use the Serial Assistant to check if the characters sent by the PLC are correct. 3. Connect the actual device for PLC-device debugging. (You … Read more
Click the blue text / Follow us As we all know, our new version of the debugging tool from Bafanghui2022 has been released! I believe that electrical engineers will use it when encountering difficulties at work. Today, I will detail the serial port debugging function of our new version of the debugging tool. First, open … Read more
Search on WeChat Technical Training 1. Description of Case Task Control Requirements The Serial Port Debugging Assistant is a software based on the Windows system: 1. Supports TCP, UDP, and Serial Port 2. Supports domain name resolution for addresses 3. Allows creating multiple connections of the same type 4. Periodic sending, hexadecimal display, automatic line … Read more
Abstract: Considering the characteristics and requirements of smart homes, this study adopts a combination of wireless ZigBee sensor networks and power line communication technology. This approach not only realizes the low power consumption, low cost, and flexible networking capabilities of ZigBee, but also utilizes existing household power lines as communication channels through power line carrier … Read more