Background Data Block The backgroundDB block is associated withFB blocks. When creating a backgroundDB block, it is necessary to specify theFB block it belongs to, and thatFB block must already exist, as shown in Figure1. When calling anFB block, you can either assign it an already created backgroundDB block (for example, data block_1), or directly … Read more
Introduction The Siemens TIA Portal platform is an advanced software development platform for modern automation control systems. In this software platform, data blocks are important elements used for storing data. What are Optimized and Standard Data Blocks In Siemens TIA Portal, data blocks are important structures for storing program data, where the main difference between … Read more
This is a common question among PLC beginners, when a new program is successfully written (downloaded) to the PLC, the existing old program in the PLC is completely deleted and replaced. 1. When using programming software (such as Siemens STEP 7) to perform the “download” operation, the internal process is as follows: 1. Compilation: Your … Read more
Introduction to Linux Inodes In the Linux file system, inode (index node) is a core concept used to store file metadata, serving as the foundation for file system management of files and directories. 1. What is an Inode? An inode (index node) is a structure in the Linux file system used to store file metadata. … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join our technical exchange QQ group with 1000 members, note 【public account】 for faster approval Understanding the File System Simply To build a framework for the file system, we can start with this command: This is the stat command, which checks the information … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join the technical exchange QQ group of 1000 people, note 【public account】 for faster approval 1. Physical Structure of the Disk The physical structure of the disk is shown in the figure: The specific physical storage structure is as follows: The basic unit … Read more