1. Used for Switch Control PLC has a strong capability to control switch signals. The number of controlled input and output points can range from a few dozen to several hundred, or even thousands, and it can control tens of thousands of points. As it can connect to virtually unlimited points, the logic problems it … Read more
Click the blue text Follow us As the core of automation control systems, Programmable Logic Controllers (PLC) play a crucial role in modern industry. So, in which fields can talents with PLC skills find employment opportunities? What are the applications of PLC across various industries, and what is the employment outlook for PLC professionals? Applications … Read more
PLC Programming Algorithm (1) In PLCs, there are three main quantities:Switching Quantity, Analog Quantity, Pulse Quantity. Once you understand the relationship between these three, you will master PLCs proficiently. 1. Switching Quantity also known as logical quantity, refers to two possible values, 0 or 1, ON or OFF (Switching quantities only have two states 0/1, … Read more
Currently, there are 5 standard programming languages for PLCs, including graphical programming languages and textual programming languages. Graphical programming languages include: Ladder Diagram (LD); Function Block Diagram (FBD); Sequential Function Chart (SFC). Textual programming languages include: Instruction List (IL) & Structured Text (ST). The programming languages of IEC 1131-3 were formed based on the reasonable … Read more
01 Start, Self-locking, and Stop Control PLC Circuit and Ladder Diagram Start, self-locking, and stop control are the most basic control functions of PLC. These can be implemented using output instructions (OUT) or set/reset instructions (SET, RST). 1. Using Coil Drive Instructions for Start, Self-locking, and Stop Control The coil drive (OUT) instruction functions to … Read more
1. Contact and Coil Instructions Programming Principles of PLC Ladder Diagram Language 1. The ladder diagram consists of multiple rungs, each coil can form a rung, and each rung has multiple branches, representing a logical equation; 2. The relays, contacts, and coils in the ladder diagram are not physical but are bits in the PLC … Read more
Today, I will explain the Siemens S7-200 series PLC logic instructions, as well as its programming methods and the structural rules of ladder diagram programming, to help new users who want to quickly get started with PLC learn the key points of these methods. Let’s take a look at this sharing! 1. Bit Logic Instructions … Read more
Search WeChat Technical Training Design Requirements for a Perfect PLC Program A complete PLC program is not just about getting the system to run; it also requires complete comments, excellent architecture, good scalability, a comprehensive alarm protection system, and a simulation system before operation. 1. Simplicity Keep the PLC program as simple as possible. Simplicity … Read more
Those engaged in industrial control work know that the development of industrial production and technology relies heavily on the automation control of PLCs. PLC can be broadly understood as: a centralized relay extension control cabinet. In practical production applications, PLCs greatly save the cost of industrial control and enhance the centralized management and automatic control … Read more
Anyone engaged in electrical work knows that industrial production and technological development are inseparable from the automation control of PLCs. PLC can be broadly understood as a centralized relay extension control cabinet. In actual production applications, PLC greatly saves industrial control costs and strengthens centralized management and automatic control of equipment. To learn PLC well, … Read more