In traditional control circuits, such as forward and reverse control, star-delta starting, etc., the start, forward, and reverse buttons used in these circuits are all normally open contacts, while the stop button uses normally closed contacts. However, after learning about PLCs, you will encounter a question: Should the stop or emergency stop button of a … Read more
With the advancement of technology, an increasing number of PLCs (Programmable Logic Controllers) are being applied in the automation control of machinery.Currently, many electricians tend to avoid dealing with them, lacking the knowledge to troubleshoot these types of faults. In fact, we can think of PLC control as being quite similar to the traditional button … Read more
LearningPLC programmingrequirescertainbasic electricalknowledge.What are the specific requirements?Today, I will discuss this. 1.Electrical Safety: As long as you are considering a career in the electrical automation industry,regardless of whattechnology you learn, the first priority isto havea sense of safety,and tohave respect for the field. 2.Relays and Control Circuits: I recommend that everyone buya switching power supply,several … Read more
The most frequently used PLC programming languages currently are Structured Text and Ladder Diagram. For technicians with little background, starting with Ladder Diagram is the quickest way to learn PLC programming. Regardless of the PLC brand, the structure of Ladder Diagrams closely resembles actual electrical control circuits. Below, we recommend several commonly used control circuits … Read more
Beginners in Mitsubishi PLC should master the fundamental logic instructions and common function instructions, focusing on understanding the logical significance of the instructions and their practical application scenarios. The following are the core essential instructions: 1. Fundamental Logic Instructions (Building Simple Control Circuits) This is the “syntax foundation” of PLC programming, corresponding to the normally … Read more
For engineers who have been exposed to PLC programming, concepts such as self-locking, interlocking, and mutual locking are certainly familiar. These are typical foundational elements in PLC programming and are core skills that must be mastered. Next, we will introduce several classic small program examples. 1. Self-Locking (Start-Stop Control) The PLC control circuit for self-locking … Read more
PLC control has high starting efficiency, fast response, fewer connections, and convenient control, and PLC is widely used in industrial automation control. PLC has numerous instructions, and flexibly applying these instructions in programming is a crucial consideration for electrical control designers. This article uses the example of a three-phase asynchronous motor Y-△ automatic voltage reduction … Read more
The most frequently used PLC programming languages currently are Structured Text and Ladder Diagram. For technicians with little foundation, starting to learn PLC programming from Ladder Diagram is the quickest. Regardless of the PLC brand, the structure of Ladder Diagrams is very similar to actual electrical control circuits. Below, we recommend several commonly used control … Read more
The function of an inverter is to convert the industrial frequency (50Hz or 60Hz) AC power supply into a frequency-variable AC power supply for the motor, providing speed control by changing the frequency of the AC power supply. There are many types of inverters, mainly divided into two categories: AC-DC-AC inverters and AC-AC inverters. The … Read more
Single Output Self-Locking Control Circuit The start signal I0.0 and the stop signal I0.1 are typically ON for a short duration. The main feature of this circuit is its “memory” function. Example 2Multi-Output Self-Locking Control Circuit (Set, Reset) The multi-output self-locking control means multiple load self-locking outputs, which can be programmed using set and reset … Read more