Ladder Diagram

The Top 5 Electrical Languages Supporting PLC Programming: Mastering All Makes You a Pro!

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The Top 5 Electrical Languages Supporting PLC Programming: Mastering All Makes You a Pro!

Search on WeChatTechnical Training The programming languages for PLCs have distinct characteristics compared to general computer languages; they are neither high-level languages nor typical assembly languages, and they must meet the requirements of being easy to write and debug. Early PLCs only supported Ladder Diagram (LD) and Instruction List (IL) programming languages. Currently, the International … Read more

PLC Basics Tutorial: Case Analysis to Improve Your Practical Skills

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PLC Basics Tutorial: Case Analysis to Improve Your Practical Skills

Hello, electronic enthusiasts and automation beginners! Today, we won’t talk in abstract terms; let’s get hands-on with PLC! Don’t be intimidated by the name; actually, PLC (Programmable Logic Controller) is simply a “high-level electric control switch”. However, it is much more complex than the light switch at home and can do many more things. In … Read more

PLC Basics Tutorial: Practical Teaching to Enhance Your Programming Skills

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PLC Basics Tutorial: Practical Teaching to Enhance Your Programming Skills

Chapter 1: Introduction to PLC What is PLC? In simple terms, a PLC (Programmable Logic Controller) is a computer used for industrial automation control. It can control and monitor various industrial devices according to pre-written programs. Components of PLC: It mainly includes the CPU (Central Processing Unit), input modules, output modules, power supply modules, and … Read more

PLC Basics Tutorial: Master Core Knowledge to Become an Automation Expert

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PLC Basics Tutorial: Master Core Knowledge to Become an Automation Expert

Hello everyone, I am Lao Wang, an experienced engineer in the automation industry. Today, let’s talk about PLCs, which are the core of the automation field, just as important as the light switch in our homes. However, instead of controlling a simple light bulb, it controls various complex industrial devices. The goal of this article … Read more

PLC Control Circuit for Cement Mixer

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PLC Control Circuit for Cement Mixer

The PLC control circuit for the cement mixer is shown in the figure. This article only presents the control circuit diagram and ladder diagram of the PLC. The main circuit controls the operation of the water pump, material pump, and mixing pump with overload protection through a variable frequency drive. The water pump is a … Read more

PLC Programming and Automation Control System Design

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PLC Programming and Automation Control System Design

PLC Control System Schematic unset unsetOpening Introductionunsetunset Hello everyone, I am Dou Dou! Today we are going to open the magic box of the PLC world. Imagine the robotic arms in factories can precisely grab parts, and automatic doors can sense pedestrians to open and close. All these magical operations are silently commanded by PLCs. … Read more

9 Classic PLC Programming Cases For Beginners

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9 Classic PLC Programming Cases For Beginners

Search on WeChat Technical Training 01 Car Forward and Backward Movement Using S7-200 to achieve automatic control of the car moving back and forth. The control process is pressing the start button, the car moves from left to right (and back from right to left). When it reaches the right (or left) limit switch, the … Read more

6 Basic PLC Programming Examples You Should Try

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6 Basic PLC Programming Examples You Should Try

01 Start-Stop Control Circuit Control Requirement: Press the start button (I0.0 is ON), Q0.0 is ON; press the stop button (I0.1 is OFF), Q0.0 is OFF. The ladder diagram is shown in Figure 1. Figure 1: Start Priority 02 Interlocking Control Circuit In the interlocking circuit shown in Figure 2, I0.0 and I0.1 are the … Read more

Understanding 5 Types of PLC Programming Languages

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Understanding 5 Types of PLC Programming Languages

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

Beginner’s Guide: 8 Basic PLC Control Circuits and Ladder Diagrams

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Beginner's Guide: 8 Basic PLC Control Circuits and Ladder Diagrams

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