Application Overview Hello everyone, I am Bao Ge! Today I bring you a super friendly communication upgrade tutorial for the S7-1200 PLC. As an experienced PLC user, I know that many friends encounter communication issues when first dealing with Siemens PLCs.This S7-1200 is, in my opinion, the most suitable PLC for beginners; it is not … Read more
‖ System Learning Life is like a marathon; sometimes you need to pause and enjoy the scenery to go further. Last time, I worked on a modbus_tcp communication protocol. I wonder if everyone has seen it. This time, I will present the implementation of the Modbus protocol using C# WinForms based on the Nmodbus4 library, … Read more
Set the upper and lower limits for the frequency set value, i.e., 0≤D40≥K10000. M8013 is a 1-second pulse cycle. Call the P0 subroutine to execute the CRC verification program for 6 data. Run the control common program. Use the rising edge to trigger the run control assignment program. Forward run control program. Reverse run control … Read more
MODBUS TCP Communication The new Mitsubishi FX5U series also supports MODBUS TCP communication. The common method is to act as a MODBUS TCP slave, where the Mitsubishi PLC listens on port 502 (default) for connection requests and read/write commands from the MODBUS TCP master. Of course, it can also act as a master to actively … Read more
On May 16, the People’s Bank of China released the financial industry standard ‘Guidelines for Financial Applications of IoT Technology’ (JR/T 0338—2025) (hereinafter referred to as ‘the Guidelines’), which took effect on the same day. It is reported that the drafting units of this document include several branches of the People’s Bank, state-owned banks, joint-stock … Read more
Click “Industrial Control Lao Xu” to follow me Introduction “Why does my PLC program crash while running?” “Clearly the logic is fine, but the output signals are jumping around?” PLC programming may seem simple, but beginners (and even experienced engineers) often fall into pitfalls due to some detail issues. This article summarizes the ten most … Read more
Detailed Explanation of MODBUS TCP Communication Commands Continuing from the previous article on the built-in MODBUS TCP command usage, the previous text only briefly mentioned the formats of three commands. Below is a detailed introduction. SP.SOCOPEN – Confirm Link In the list of built-in communication commands, you can see this command and its function description, … Read more
In the era of rapid development of smart devices, efficient communication between internal chips is crucial. The SPI (Serial Peripheral Interface) bus, with its unique advantages, has become the preferred solution for communication between many chips. Today, let us delve into the world of SPI and explore how it achieves high-speed and stable data exchange … Read more
Common Fault Codes for Gas Meters Ecological City Public Utility Information Release Platform “Beep beep beep… beep beep beep…” The gas meter in the kitchen suddenly starts beeping continuously. The screen is flashing with incomprehensible signal codes! What do these signal codes mean? Don’t worry. Today, we will teach you to quickly understand common fault … Read more
2025.05.25 Word Count: 3931 Estimated Reading Time: 5 minutes Abstract SRIO is commonly used for communication between FPGA and DSP, FPGA to FPGA, and inter-board communication. Based on previous experience implementing SRIO protocol communication between FPGA boards and between FPGA and DSP in projects, this article shares how to easily develop SRIO applications in FPGA. … Read more