PLC

The Evolution of Open Automation The traditional industrial control sector has long faced several critical challenges: communication ecosystem barriers, tight hardware-software integration, complex industrial network configurations, and inflexible computational capabilities. According to industry statistics, there are over 30 international industrial communication protocol standards in existence today. This diversity, coupled with proprietary ecosystems created by major […]

Recently, I came across a fascinating case where AI was applied to closed-loop pH control. This represents a significant step forward, demonstrating the technical feasibility of using AI algorithms in feedback control systems. However, it raises the question: why and how should AI be integrated into feedback control? This question is complex and worth exploring.

What Are In-Phase Oscillations? In control systems, an in-phase oscillation occurs when a control loop in automatic mode exhibits regular oscillations. Depending on the nature of these oscillations, they can be categorized into three types: Nonlinear Oscillations: Symptoms: Process variable exhibits square-wave behavior, while the controller output forms a sawtooth pattern. Cause: This is often

Introduction Distributed Control Systems (DCS) are pivotal in managing industrial processes safely and efficiently. Graded alarm control technology ensures that alarms in different zones are independent, using dedicated detectors for each area. This facilitates timely alerts when anomalies occur, drawing operators’ attention and preventing accidents. This document outlines the application, principles, and management strategies for

The HART (Highway Addressable Remote Transducer) protocol is a hybrid communication protocol widely used in industrial automation. By combining analog and digital communication, HART facilitates seamless integration of smart devices into traditional control systems. This article delves into the working principles of the HART protocol, its advantages, limitations, and applications across various industries. Principles of

Introduction to Analog Signals Analog signals are physical quantities that change continuously over time, such as voltage, current, pressure, speed, and flow rate. These signals are widely used in industrial automation for sensing, monitoring, and controlling physical parameters. Common examples include 0–10V voltage signals and 4–20mA current signals, which can be processed using Programmable Logic

Thermal relays are essential components in electrical systems, widely used for overload protection of motors and other electrical equipment. Their operation is based on the principle of thermal effects caused by electric current. This article delves into their working principle, structure, and practical applications, offering a comprehensive understanding of this indispensable device. Working Principle of

Incoming panels (or incoming switchgear) are integral components of power distribution systems, serving as the gateway for electrical power into a building or facility. These panels receive high or low voltage power from external sources and distribute it to downstream systems while ensuring safety, control, and monitoring. Below is an in-depth overview of their composition,

In the realm of industrial automation, the Programmable Logic Controller (PLC) has long been regarded as the “brain” of control systems. It excels in executing logical operations, sequential control, timing, counting, and arithmetic tasks. However, as industrial processes grow increasingly complex, a standalone PLC system often falls short of meeting modern manufacturing demands. Enter the

RS-485 is one of the most widely used industrial communication standards. It provides a robust, long-distance and noise-resistant method for data exchange between field devices, PLCs, controllers and sensors. Due to its differential transmission and multi-drop capability, RS-485 is considered a reliable backbone for distributed industrial control systems. 1. What Is RS-485? RS-485 is a