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
Search on WeChat Skill Training The Programmable Logic Controller (PLC) is a type of programmable memory used to store programs internally, execute logical operations, sequential control, timing, counting, and arithmetic operations based on user commands, and control various types of machinery or production processes through digital or analog input/output. Today, we have organized a comprehensive … Read more
Search on WeChat Technical Training PLC Programming Algorithm (1) In PLC, there are mainly three types of quantities:Switching Quantity, Analog Quantity, Pulse Quantity. Understanding the relationship between these three will allow you to master PLC proficiently. 1. Switching Quantity, also known as logical quantity, refers to only two values, 0 or 1, ON or OFF … Read more
Search on WeChat Technical Training Can learning PLC be beneficial? Yes! It can lead to projects and income! So how can one undertake a project? What skills and knowledge are required? Today, let’s discuss these topics. Different PLC models carry different project scopes. Siemens S300/400 PLCs and S1500 PLCs are considered medium to large PLCs, … Read more
For those just starting with PLCs, mastering the programming language and understanding instructions is one of the fundamental conditions. Regardless of how different your programming habits are from others, you must learn this element of instructions, as programming cannot do without its components. Below, let’s take a look at the extent of the application of … 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
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
The programming language for PLC software has distinct characteristics compared to general computer languages. It is neither a high-level language nor a typical assembly language, and it must meet the requirements for ease of writing and debugging. Early PLCs supported only ladder diagram programming language and instruction list programming language. According to the International Electrotechnical … Read more
Search WeChat Technical Training 【Introduction】 For skilled PLC engineers, the program writing focuses on the following two points. 1. Content of PLC Programs The PLC application program should maximize the control requirements of the controlled object. After conceptualizing the framework of the main program, it should be the main line to write the programs that … Read more