Modbus RTU

PLC Protocol Optimization: Frame Structure Design to Reduce Transmission Overhead and Improve Efficiency!

by
PLC Protocol Optimization: Frame Structure Design to Reduce Transmission Overhead and Improve Efficiency!

PLC Protocol Optimization: Frame Structure Design to Reduce Transmission Overhead and Improve Efficiency! Introduction Hello everyone! Today I want to share a technology that can significantly enhance the communication efficiency of PLCs—frame structure optimization design. "A 30% increase in transmission efficiency is not a dream!" This seemingly technical topic is essentially about “slimming down” PLC … Read more

RS-485 Multi-Slave Communication: How to Effectively Avoid Interference Between Devices?

by
RS-485 Multi-Slave Communication: How to Effectively Avoid Interference Between Devices?

In scenarios such as industrial automation, building control, and energy monitoring, RS-485 serial communication is widely used for data transmission between devices due to itslong-distance transmission capability, strong anti-interference ability, and support for multi-node communication. Especially in a master-slave structure, RS-485 is an ideal choice for achieving centralized control and distributed sensing. However, during actual … Read more

How Does PLC Communicate with HMI? [Essential Knowledge]

by
How Does PLC Communicate with HMI? [Essential Knowledge]

When we are establishing communication between HMI and PLC, we need to address a key issue, which is the parameter settings for the communication connection between HMI and PLC. This is a common question among many learners and is a focal point of our study. The communication between the touchscreen and PLC can be divided … Read more

Step-by-Step Guide to Siemens S7-1200 MODBUS RTU Communication with Temperature Controller and Inverter

by
Step-by-Step Guide to Siemens S7-1200 MODBUS RTU Communication with Temperature Controller and Inverter

Search on WeChat Technical Training 1. Hardware PLC 1. S7-1200 PLC 1211C model CM1241 communication module; 2. Panasonic temperature controller KT4-1; 3. Qixi inverter HD700 series; 4. MCGS TPC 7062K touch screen. 2. Communication Purpose PLC The S7-1200 PLC sets data for the temperature controller and inverter via the touch screen, including temperature setpoint (SV); … Read more

S7-200smart Modbus-RTU Communication V20 (2) Inverter

by
S7-200smart Modbus-RTU Communication V20 (2) Inverter

Hello, dear students! Good evening! Today we continue to introduce the technical explanation of S7-200smart Modbus-RTU Communication V20 Inverter. Students who are interested can leave us a message for interaction~ Let’s get to the main content! PART ONE Introduction to Modbus-RTU Library Instructions Since we are using the built-in RS-485 port of the S7-200smart CPU; … Read more

Mitsubishi FX2N PLC and Mitsubishi Inverter Modbus RTU Protocol Communication Application

by
Mitsubishi FX2N PLC and Mitsubishi Inverter Modbus RTU Protocol Communication Application

Search on WeChat Technical Training Modbus is a serial communication protocol invented by Modicon for communication between PLCs and hosts. Its physical layer uses asynchronous serial standards such as RS232 and RS485. Due to its openness, it has been adopted by numerous PLC and RTU manufacturers. The Modbus communication method adopts a master-slave query-response mechanism, … Read more

Communication Case: Modbus-RTU Communication Between S7-1200 and HD20 Inverter

by

Search on WeChat Technical Training When it comes to inverter communication, there are analog control, communication control, and terminal control. This article will guide you through the understanding of Modbus-RTU communication between the S7-1200 PLC and the HD20 inverter. Speaking of the Modbus-RTU communication protocol, I believe everyone is familiar with it, as it is … Read more

Direct Control of Inverter with Touchscreen Without PLC

by
Direct Control of Inverter with Touchscreen Without PLC

Search on WeChat Technical Training In most cases, the touchscreen is connected to a PLC, which then connects to the inverter. However, the touchscreen can also connect directly to the inverter without going through the PLC, controlling the inverter’s start, stop, frequency change, etc. Today, we will take the Wecon touchscreen controlling the Mitsubishi D … Read more

PLC and Modbus RTU Device Communication: Complete Guide

by
PLC and Modbus RTU Device Communication: Complete Guide

Modbus RTU Communication: How to Write for PLCs and Easily Connect Device Data Implementing Modbus RTU communication with Siemens PLCs to achieve data exchange among multiple devices, applicable in industrial sites. Today, I will guide you step by step! Project Requirements and Functionality Description The main requirements of this project are: Enable data communication between … Read more