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Implementation plan and case analysis of plc industrial router 4G
4G wireless industrial-grade routers have become widely adopted in various industries. For PLC engineers, remote access to PLC systems via the Internet not only saves time by eliminating the need for on-site visits but also enables quick troubleshooting and maintenance of machines. This approach helps reduce labor costs, save resources, and provide faster service to customers, ultimately minimizing their losses. Despite these benefits, challenges in remote PLC communication still exist and require urgent solutions.
Remote control of PLCs using 4G wireless industrial routers has emerged as a promising solution. The following section explains the principles behind PLC remote control and demonstrates how the HJ8300 4G wireless industrial router from Huajie Intelligent Control supports remote monitoring and program downloading for various PLC brands, including Siemens, Mitsubishi, Omron, and Delta.
Currently, many users rely on methods like IP mapping, VPNs, or "peanut shell" tools for remote PLC access, which often involve complex configurations and can be unstable. With Huajie’s SmartLink technology, the process becomes significantly simpler and more reliable.
The HJ8300 Industrial Router is a dedicated 4G wireless device designed for remote PLC program monitoring and download. It supports both wired and wireless (4G/WiFi) connectivity and connects to PLCs through network ports or RS232/RS485 interfaces. This allows engineers to remotely monitor ladder diagrams and upload programs using standard PLC programming software.
The HJ8300 connects to the PLC via a serial port (RS232 or RS485), and the remote computer only needs an internet connection. There’s no need for a fixed IP address—just install the SmartLink green software from Huajie Zhikong and the relevant PLC programming software to enable remote access and debugging.
**Real-world Example:**
In one case, the HJ8300 was connected to a PLC via an RS232 bus, and then accessed via 4G or ADSL. The central system could then use PLC programming software to monitor the ladder diagram and download programs. The setup was straightforward: after installing the company’s configuration software and making simple settings, a virtual serial port was created. The user then opened the programming software and selected the virtual port.
**Supported PLC Model:** DVP16ES200R
Here are the steps involved in the configuration:
- Configure the HJ8300 under the same SmartLink LAN.
- Set up the serial port on the HJ8300.
- Install a virtual serial port on the local computer.
- Successfully install the virtual serial port.
- Configure the SmartLink green software on the computer.
- Ping the router’s SmartLink IP.
- Confirm that the router and computer are in the same SmartLink LAN.
- Make the necessary communication settings.
Once everything is set up, engineers can remotely access the PLC, monitor the ladder diagram, and perform program downloads seamlessly. This solution offers a reliable, user-friendly way to manage PLC systems from anywhere with an internet connection.