1. The “Impossible Triangle” of Industrial Data Transmission: Real-time? Reliable? Low Cost? Industrial sites have three conflicting demands for data transmission:✅ Low Latency (alerts must be fast)✅ High Reliability (data cannot be lost)✅ Low Resource Usage (limited computing power/bandwidth on edge devices) —— Traditional solutions struggle to balance these: Modbus TCP Medium (polling jitter) Low … Read more
“When you first take on industrial equipment, the three letters CANopen feel like a threshold.”“In fact, it’s not that mysterious; it just needs someone to guide you in.”—— From the blood and tears of a bald engineer 🟧 1. Why Learn CANopen? If you are working on: AGVs, small vehicles, AMRs Robotic arms Motor drivers … Read more
In industrial control environments, the inconsistency of baud rates among different devices’ serial ports (such as RS485 and RS232) is a common headache. To unify control of these devices by the main control board or PLC, it is essential to ensure consistent baud rates. However, some devices allow manual baud rate settings, while others are … Read more
In the field of industrial control, MODBUS-RTU is one of the most universal and time-tested communication protocols. It acts like the “Mandarin” among devices, allowing instruments, PLCs, and controllers from different manufacturers to communicate smoothly. Today, I will set aside complex theories and directly guide you through the four most commonly used function codes:01, 03, … Read more
In industrial settings, have you ever encountered the dilemma where remoteI/O modules are just a hundred meters away, yet due to electromagnetic interference, the data fluctuates? When production lines are too long, frequent packet loss occurs with copper cables, leading to downtime losses of tens of thousands? Don’t worry, today we will unveil theNaisun AutomationProfibus … Read more
Modbus TCP is a mainstream communication protocol in the field of industrial Ethernet, based on the TCP/IP protocol stack for data transmission. It simplifies the verification mechanism based on Modbus RTU (relying on the TCP protocol’s own verification instead of CRC16), and implements device addressing and request-response matching in an Ethernet environment through the MBAP … Read more
In high-demand application scenarios such as industrial communication, automation control, and telecommunications infrastructure, stable, high-speed, and interference-resistant data transmission is a key issue. For a long time, the MAX series of RS-485/RS-422 transceivers have been widely adopted due to their reliability. Now, Shanghai Chenyu Electronics has launched a new series of CYI3488, CYI3490, and CYI3491 … Read more
In the fields of automation and Industrial Internet of Things (IIoT), Programmable Logic Controllers (PLCs) have played an indispensable role. With the development of network technology, real-time collection and management of PLC data has become a crucial demand for smart factories. MQTT, as a lightweight communication protocol, demonstrates its unique advantages in PLC data collection. … Read more
【Introduction】 When faced with a wiring scenario of 100 meters in a workshop, should you choose RS232, RS422, or RS485? The core differences among the three are immediately apparent: RS232 supports only 15 meters of point-to-point communication, RS422 can reach 1200 meters but is limited to unidirectional transmission, while RS485, with its 1200-meter transmission distance … Read more
Getting Started with Modbus and Fieldbus (Part 1) In PLC applications, after understanding hardware configuration and logic programming, a significant part of the work involves handling field communication. There are various fieldbus protocols, which actually follow certain patterns. The most commonly seen fieldbus protocol on-site is probably Modbus. When I first encountered Modbus, I also … Read more
