Click on the above “ Technical Training ” and select “Top Public Account” 130,000+ industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos The timer instruction is a very common type of instruction in PLC program design, and the timer instruction format and usage of the S7-1200 series PLC are … 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
Click on “ Jicheng Training ” above, select “Pin to Top” 160,000+ industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos In the Omron PLC system, the units occupy different addresses in the CIO area according to their front and back positions or special characteristics. Understanding address allocation and knowing … Read more
1 CPU Abnormality: When a CPU abnormality alarm occurs, check all devices connected to the internal bus of the CPU unit. The specific method is to replace the potentially faulty units one by one to identify the faulty unit and take appropriate action. 2 Memory Abnormality: When a memory abnormality alarm occurs, if it is … 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
1、STEP 7STEP 7 is the latest Chinese version of Siemens PLC programming software, supporting 32-bit MS Windows 7 Professional, Ultimate, and Enterprise (standard installation) operating systems.STEP 7 has the following features: hardware configuration and parameter settings, communication configuration, programming, testing, commissioning and maintenance, file archiving, operation, and diagnostic functions, etc.All functions of STEP 7 come … Read more
1: What Environment is Required for Step7 Micro/WIN V4.0 to Function Properly? The installation and operating environment for Step7 Micro/WIN V4.0 is: Windows 2000 SP3 or higher Windows XP Home Windows XP Professional Siemens has not tested it on other operating systems and does not guarantee functionality. 2: What is the Compatibility of Step7 Micro/WIN … Read more
The communication routine for Schneider PLC involves three function blocks: ADDM, READ_VAR, and WRITE_VAR. Below, I will introduce each of them. 1 ADDM The ADDM function block is for address conversion, which converts the physical address of the PLC into an address type recognizable by the PLC. To put it simply, it converts a string … Read more