The main function of an oscilloscope probe is to bring the voltage signal being measured from the measurement point into the oscilloscope for measurement. Ideally, the oscilloscope probe should have no effect on the measured signal, but in reality, its long cable inevitably has stray inductance, capacitance, and resistance. Therefore, they will affect the oscilloscope’s … Read more
Search WeChatTechnical Training Stepper motors are commonly used for positioning control, and they can control the rotation angle (which can be relative distance) through the number of pulses output by the PLC. The frequency of the pulses controls the speed of the stepper motor. For applications where high precision is not required, this method is … Read more
Search WeChatTechnical Training1 When PLC and the upper computer (or touch screen) form a monitoring system, it is often necessary to have control modes like “manual” and “automatic” on the screen (generally multiple modes can only be selected one at a time). In the program, you can use the “MOV” instruction. For example: when “manual” … Read more
1. Characteristics of PLC Control System Ladder Diagrams (1) Input Signals and Output Loads of the PLC Control System The actuators such as AC contactors and solenoid valves in the relay circuit diagram are controlled by the output relays of the PLC, with their coils connected to the output terminals of the PLC. Buttons, control … Read more
As we all know, PLCs are widely used in the automatic control of various production machinery and processes, becoming one of the most important and widely used industrial control devices, recognized as one of the three pillars of modern industrial automation (PLC, robots, CAD/CAM). As long as you are involved in automation, you must know … Read more
The PCS-978 series digital transformer protection is suitable for voltage levels of 35kV and above, requiring dual sets of main protection and dual sets of backup protection with various wiring methods for transformers.The PCS-978 device supports both electronic and conventional current transformers, complies with the power industry communication standard DL/T667-1999 (IEC60870-5-103) and the new generation … Read more
Focusing on Automation Training for 14 YearsJicheng Training NetworkToday, I will share a valuable article to help everyone understand what constitutes a perfect PLC program and provide guidelines and suggestions for PLC programming in practice.01The Design Requirements for a Perfect PLC Program A complete PLC program is not just about making the system operational; it … Read more
Click↑↑Technical Training, follow and pinto subscribe for free long-term 170,000+people in industrial control follow this WeChat platform: technical sharing, learning exchange, industrial control videos Many people have worked as salespeople, repairmen, electricians, taxi drivers… before learning PLC. Once they enter society, learning becomes a rare task; lacking teachers, books, and guidance, especially in such a … Read more
In a PLC control system, although the wiring work occupies a small proportion, it is the foundation of programming design. Only with correct wiring can programming proceed smoothly. To ensure the correctness of the wiring, a clear understanding of the input and output circuits inside the PLC is essential. DC Input Circuit As shown in … Read more
Comprehensive PLC Programming Algorithms PLC Programming Algorithm (1): In PLC, there are three main types: digital signals, analog signals, and pulse signals. Understanding the relationships among these three will allow you to master PLCs proficiently. 1. Digital signals, also known as logic signals, refer to values that can only be 0 or 1, ON or … Read more