HPLC

Introduction to CANopen Protocol: Multi-Device Collaborative Communication Design

by
Introduction to CANopen Protocol: Multi-Device Collaborative Communication Design

Introduction to CANopen Protocol: Multi-Device Collaborative Communication Design In the field of industrial automation, multi-device collaborative communication is a common requirement. For example, multiple PLCs, sensors, and actuators on a production line need to coordinate with each other. To address this, the CANopen protocol was developed. It is a high-level protocol based on the CAN … Read more

Common Issues and Error Codes of Modbus RTU Communication for S7-200 SMART

by
Common Issues and Error Codes of Modbus RTU Communication for S7-200 SMART

Common Issues 1. Does S7-200 SMART support Modbus ASCII communication mode? The STEP 7-Micro/WIN SMART software does not provide a command library for Modbus ASCII communication mode. If the S7-200 SMART CPU is used for Modbus ASCII communication, the user needs to program using the free port communication mode. 2. Can the integrated RS485 port … Read more

Modbus Communication Case in PLC Programming

by
Modbus Communication Case in PLC Programming

1. Hardware Setup The Modbus communication in the program is conducted between the communication port 0 of two S7-200 CPUs (it is best for each CPU to have two communication ports). On the master side, you can also use the corresponding library files “MBUS_CTRL_P1” and “MBUS_MSG_P1” to communicate through communication port 1. Communication port 1 … Read more

Summary of Modbus RTU Issues

by
Summary of Modbus RTU Issues

Click on “Benefits Are Here! Free PLC Resources, Do You Want It?“ 1.What Are the Differences Between ModBus RTU and ModBus Communication Protocol? ModBus protocol is an application layer message transmission protocol (OSI model layer 7), which defines a protocol data unit (PDU) independent of the communication layer, that is, PDU=Function Code+Data Field. ModBus protocol … Read more

Siemens MODBUS_TCP Client

by
Siemens MODBUS_TCP Client

This article introduces: the MODBUS TCP client communication program for Siemens S7-1200 PLC. Step One:Create a DB block named:MODBUS_DB Step Two:Create a variable:Mod with data type:TCON_IP_v4 Step Three:Set the hardware identifier:16#40; ID:10 (can be changed);ConnectionType16#0B;ActiveEstablished( Client1 (Active): Server is0 (Passive)): Set toTRUE Step Four:Set theIP address (ADDR): 192.168.1.245 Port number 502 Step Five:Create a MODBUS … Read more

Siemens PLC 1200 and 1500 Modbus RTU Communication Test

by
Siemens PLC 1200 and 1500 Modbus RTU Communication Test

Modbus RTU Communication Overview of Modbus RTU Communication In modern highly integrated industries, communication between PLCs is often used. Common communication protocols include Modbus, Profibus DP, Profinet, CANOPEN, etc. Today, we will explain how to perform Modbus RTU communication between two PLCs using Siemens TIA Portal. Before establishing communication, we must meet the following software … Read more

Getting Started with Modbus and Fieldbus

by
Getting Started with Modbus and Fieldbus

Getting Started with Modbus and Fieldbus (Part 1) In PLC applications, after understanding hardware configuration and logic programming, a significant part of the work involves handling field communication. There are various fieldbus protocols, which actually follow certain patterns. The most commonly seen fieldbus protocol on-site is probably Modbus. When I first encountered Modbus, I also … Read more

20 PLC Component Numbering and Modbus Address Correspondence Table

by
20 PLC Component Numbering and Modbus Address Correspondence Table

Click the blue text Follow us Sometimes we have too many messages from public accounts that we like, and we miss some of our favorite messages and cannot see the posts from the industrial control forum in time. We can star or pin the public account. So how do we star and pin it? 【Open … Read more

Implementing Communication Between MCU and PLC Using Modbus Protocol

by
Implementing Communication Between MCU and PLC Using Modbus Protocol

1. Introduction HMI (Human-Machine Interface) is increasingly used in industrial automation systems and equipment due to its small size, high performance, and strong real-time capabilities. It features various displays such as letters, Chinese characters, graphics, and images, with a simple and user-friendly interface. Equipped with long-lasting membrane button keyboards, it is easy to operate. Typically, … Read more

Application Sharing 3: Controlling Fanuc Robots via Modbus TCP with PLC

by
Application Sharing 3: Controlling Fanuc Robots via Modbus TCP with PLC

The project was completed two years ago, at a time when there wasn’t as much information about Fanuc robots available online. This project was completed through exploration, and I am writing this article based on my memory. If there are any inaccuracies, please take it lightly and consider this article as a reference idea.1. Control … Read more