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The application of PLCs in industry is increasing, and as industrial equipment becomes more reliant on PLCs, the demand for remote programming and debugging of PLCs using programming software, as well as the uploading and downloading of programs to achieve remote control of PLCs, is growing.
PLC Control System: A Programmable Logic Controller (PLC) uses a type of programmable memory to store programs internally, executing logical operations, sequential control, timing, counting, and arithmetic operations based on user instructions, and controlling various types of machinery or production processes through digital or analog input/output.
The Industrial IoT Gateway uses VPN for secure remote communication, achieving PLC remote control while ensuring the isolation of PLC data from the ordinary internet. The PLC remote intelligent control gateway and PLC communication module also ensure that PLC data is transmitted directly to the monitoring room without passing through the cloud server, reducing the load on the cloud server and further ensuring the security of PLC data. The system uses PLC as the core of device control and the PLC remote monitoring gateway as the data remote collection terminal.
The Industrial IoT Gateway collects PLC programs and operating parameters to PCs, LED screens, and other monitoring terminals through various communication methods such as 3G, 4G, 5G, WiFi, and Ethernet. Relying on the programming software of the monitoring terminal, the following operations can be performed remotely on the PLC:
1. Remote programming and debugging of PLC;
2. Online monitoring of PLC;
3. Online simulation of PLC;
4. Uploading and downloading PLC programs;
5. Remote data collection of PLC;
6. Remote control of PLC devices;
7. Remote online monitoring and programming of PLC;
8. Remote control of PLC devices;
9. Centralized management of equipment;
10. Parameter threshold warning;
11. Intelligent analysis and decision-making for fault warnings.
Using the PLC remote control gateway and PLC communication module for remote control of PLCs enables real-time maintenance of equipment from a distance, improving the comprehensive prevention and remote diagnosis capabilities of enterprises regarding equipment failures.
Through the industrial internet platform, the following functions can also be achieved:
1. SMS alarm function; when equipment malfunctions, an alarm SMS can be sent, and phone calls or SMS notifications can also be set up, ensuring reliable equipment safety and achieving unattended operation, requiring only very simple settings in the module, without the need to write any programs in the PLC or download the PLC program again.
2. Accessing the web page via mobile phone or computer to directly monitor the status of PLC variables, achieving control of PLCs via the internet.
3. Remote wireless monitoring between configuration software and PLCs; multiple PLCs or devices supporting Modbus communication can be remotely monitored through configuration software, achieving centralized monitoring over long distances via GPRS, 4G, or 5G networks.
4. Remote downloading and monitoring of PLC programs; when equipment malfunctions, as long as your computer or mobile phone is connected to the internet, you can access your PLC anytime and anywhere, modify programs, and monitor program maintenance of equipment.
5. Short-distance wireless communication between multiple PLCs; if multiple PLCs are located in the same factory area, short-distance wireless communication can be achieved.
6. Remote wireless communication between multiple PLCs; for example, achieving data exchange and transmission between PLCs located in Shanghai and Changsha can involve PLCs from the same manufacturer or different manufacturers.
