RS485 has strong anti-interference capability and low cost, making it widely used in various fields such as industrial smart instruments and communication devices. The RS485 circuit can be divided into non-isolated and isolated types. Among them, the isolated circuit adds isolation performance based on the non-isolated circuit, giving the circuit stronger anti-interference and system stability. … Read more
Click↑↑Technical Training, follow and pinto subscribe for free long-term 190,000+Industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos RS232 and RS485 are common interfaces in low-voltage applications. Many friends mention the differences between them, so today let’s learn about them together. 1. Physical Structure of Interfaces 1. RS232 Interface: One … Read more
Click the blue textFollow me! ☀The Jicheng WeChat platform has become an invaluable mentor for industrial control students. Follow Jicheng, and technical improvement is guaranteed! QQ consultation: 4001114100 Source: Jicheng Training Network (Teacher Liang Zhibin) ▏Siemens S7-200 Series 17 1.6.4 Network Wiring For RS485 networks such as PPI, MPI, and Profibus, it is recommended to use … Read more
Search on WeChat Technical Training Siemens, as one of the earliest industrial control manufacturers to enter the Chinese market, has maintained a very high market share. Siemens PLCs have excellent quality, and their network stability and openness are favored by industrial control personnel. Moreover, the variety of programming software is convenient to use, making it … Read more
Search on WeChat Technical Training There have been persistent issues with Profibus communication at a certain brewery. Previously, SIAS and on-site engineers had re-planned the entire Profibus network topology, but there were still instances of DP slave devices dropping out, occurring multiple times in a short period, severely affecting the factory’s normal production. Therefore, the … Read more
1. What is MODBUS? 1. Basic Concepts MODBUS is a communication protocol initially advocated by MODICON (now a brand of Schneider Electric). It has gradually been recognized as a standard communication protocol through practical applications by most companies. As long as data communication or transmission is conducted according to this protocol, different systems can communicate … Read more
Hello everyone, today we will discuss the principles of RS485 communication, why matching resistors need to be added when the communication line is long, how to add them, how to adjust the value of the matching resistors, their impact on the output waveform, and why matching resistors should be added at both ends, among other … Read more
Search on WeChat Technical Training Source of the Pitfall: Poor Load Capacity of Passive RS232 to RS485 Converters If you are an industrial control engineer and often deal with communications, you will inevitably encounter the issue of poor driving capability of passive RS232 to RS485 converters. Previously, I worked on a product in a small … Read more
In RS485 communication systems, the choice of grounding method is crucial, directly affecting the system’s stability and anti-interference capability. Therefore, engineers need to choose the grounding method reasonably based on project requirements. Below we will discuss which grounding is suitable for the RS485 bus. 1. Single Point Reliable Grounding There can only be one grounding … Read more
The RS485 bus has advantages such as simple structure, long communication distance, fast communication speed, and low cost. It is widely used in industrial communication, power monitoring, instrumentation, and other industries. Due to the harsh industrial control environment, more interference coupling can occur in communication lines, affecting the reliability of the RS485 bus, and even … Read more