Introduction In actual work sites, PLCs are often used to control inverters. There are several ways for PLC to control inverters, such as terminal control, analog control, and communication control. Among these, communication control has certain advantages over the first two methods, such as the ability to read multiple data from the inverter with just … Read more
Having previously worked with microcontrollers and the following 20 types of PLCs for Modbus RTU serial communication, I am now sharing the correspondence table of these 20 PLC input, output, and register components with their Modbus address numbers. Mitsubishi X components support Modbus function code 02; Y components support Modbus function codes 01, 05, and … Read more
About Us For business cooperation, please contact QQ: 3350579506 For more exciting consultations, please follow Electrician 365 (diangong365) Electrician Home QQ Group:Group 1: 468193845 Group 2: 522898769 Often, technicians encounter this problem: why can’t my touch screen communicate with the PLC? For example, the following two issues: 1. The Weintek touch screen cannot communicate with … Read more
In this issue, we focus on the satellite platforms and payloads for satellite internet. Satellites are mainly divided into three categories based on their purposes or payloads: communication satellites, navigation satellites, and remote sensing satellites. 01 Overview of Satellites (1) Navigation Satellites Satellite navigation is a space-based radio navigation system that uses navigation satellites as … Read more
Previously, I explained the power-on and startup control strategies for the EDC7 and EDC17 computer boards. If you haven’t seen it, you can click below to review. ↓↓↓↓↓↓ Detailed Explanation of Power-On Control Strategies for Various ECUs (Part 1) Today, I will explain another control strategy for startup using CAN communication signals. The heavy-duty truck … Read more
Introduction Recently, Siemens PLC prices have surged significantly, causing quite a stir in the industrial control sector. Not only have prices increased, but there are also shortages, forcing many to change their plans. It is said that chip replacements have been completed recently, and supply is expected to resume soon, along with price adjustments. This … Read more
Authors: Wang Jing, Chen Jianfeng, Zhang Lijie, Huang Jianguo, Source: Streams of Ocean Life 1. Introduction Underwater wireless sensor networks (UWSNs) utilize aircraft, submarines, or surface vessels to randomly deploy a large number of inexpensive miniature sensor nodes (ranging from hundreds to thousands) into the water of interest. These nodes form a multi-hop, self-organizing network … 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