Recently, I used the Modbus protocol for communication with third-party devices. Here are some points to summarize and share, to help everyone avoid pitfalls in the future. This article does not provide a systematic explanation of the Modbus protocol but describes the issues and precautions encountered during usage, taking RS485-based Modbus-RTU as an example: 1. … Read more
1. Why Is Serial Communication So Popular? When working on microcontroller products, the most commonly used method is serial communication. For any microcontroller peripherals, the priority is to choose those with serial port functionality, such as Bluetooth modules, WIFI modules, 4G modules, electric meters, and displays. Why Is Serial Communication So Popular? Because it’s simple! … Read more
PROFINET and PROFIBUS are two fieldbus systems introduced by the PNO organization. There is no comparability between the two; PROFINET is based on industrial Ethernet, while PROFIBUS is based on RS485 serial bus. The protocols of the two are completely different due to the differing media, with no connection between them. However, both have excellent … Read more
Search on WeChat Technical Training In most cases, the touch screen is connected to the PLC, which then connects to the inverter. However, the touch screen can also connect directly to the inverter without going through the PLC. It can control the inverter’s start, stop, frequency change, etc. Today, we will take the Weicon touch … Read more
The following example connects the MT6103IP touch screen to a Panasonic PLC; other brands of PLCs can be referenced. 1. Determine the connection scheme as follows: 2. Hardware wiring Below are the wiring terminals of the touch screen, which has 9 pins, allowing for one group of RS232 and another group of RS485. 1) RS232 … Read more
In the previous article “UART Communication Interface Protocol – UART (I) Protocol Basics”, we briefly and meticulously describedUART configuration items and the signal timing of the communication process. This article will continue to introduce some interface specifications used by theUART interface under different electrical characteristics. 1. Introduction In fact,UART only defines the signal timing without … Read more
Free FANUC/Yaskawa Industrial Robot Materials, Interested? (Click on the red text above to receive the materials for free) PROFIBUS is an open digital communication system with a wide range of applications, representing a significant breakthrough in the transition from centralized automation systems to decentralized automation systems. Since its inception, PROFIBUS has focused on system integration … Read more
Testing and Measurement Tools 1. Handheld Devices Handheld devices are specially developed for testing PROFIBUS cables with RS 485 interfaces. For example, Siemens BT200 (recommended) and ComSoft Nettest II. Handheld devices can test the installation, as well as check the PROFIBUS cables and stations. To use the handheld device, it must be connected to the … Read more
[Introduction] PROFIBUS fieldbus mostly uses RS485 for serial communication, but in some cases, it can also convert the cable into optical fiber for communication, and OLM is such a device. Technical communication, click here to join the group Sales procurement, click here to join the group Project docking, click here to join the group Talent … Read more
Search on WeChat Technical Training In engineering, the RS485 control line is often mentioned. What exactly is it? Today, I will discuss the applications related to RS485. By delving deeper into RS485, you will find that there is indeed a lot of knowledge involved. Therefore, we will choose some common issues in weak current systems … Read more