4G Industrial router for PLC wireless remote control system

4G Industrial router for PLC wireless remote control system

　　 PLC = Programmable Logic Controller, a programmable logic controller, an electronic system operated by digital operations, designed specifically for applications in industrial environments. It uses a type of programmable memory for its internal storage of programs, executes user-oriented instructions such as logic operations, sequence control, timing, counting and arithmetic operations, and controls various types of machinery through digital or analog input/output Or the production process.

At present, PLC has been widely used in various industries such as steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobiles, textiles, transportation, environmental protection, water treatment, culture and entertainment at home and abroad. It can be seen that PLC is the core of industrial automation control. part.

The communication and control of PLC will be a revolution in the era of communication networks. In fact, industrial control sites usually have harsh environments, such as high temperature, humidity, vibration, and serious power grid interference, especially in the presence of electromagnetic and radio interference. For long, continuous, reliable, and complete data transmission, electromagnetic shielding of the line is required. And physical protection; in some industrial environments, such as moving or rotating equipment, routing is very inconvenient.

In order to solve these problems, zoko-link introduced a set of solutions that use industrial 4G routers to replace industrial control field wired cables for measurement and control through wireless data transmission technology, which provides a shortcut for various difficulties in data transmission in complex environments. The solution uses the customer's internal Internet server to remotely control the industrial site through wireless communication, without being restricted by distance and networking.

　　Industrial 4G router is used for PLC wireless remote control system system composition:

　　 The whole system in this scheme is composed of three main parts: Siemens smart200 series PLC, zoko-link industrial 4G router, and server, as shown in the figure above. The server establishes a VPN connection with the 4G router through the Internet network, 2G/3G/4G network, and the 4G router is directly connected to the PLC located at each industrial site through the network port (LAN) to realize remote control of the PLC.

　　Industrial 4G router is used for PLC wireless remote control system program advantages:

　　 1. Simplify engineering and reduce wiring costs:

　　Suitable for various industrial control sites with complex environments, simple construction, flexible networking, and avoid the trouble of integrated wiring.

　　2, the data is safe and reliable:

　　 Adopt 2G/3G/4G network standard to ensure the coverage and popularization of the network, support the operator APN/vpN, and the encrypted communication method effectively guarantees the security of APN private network data communication. At the same time, the device has multiple VPN connections such as IPSEC, PPTP, L2TP, GRE, and OPENVPN, as well as VPN client and server functions. To ensure the safety and reliability of data communication, to ensure the safety and effectiveness of the current industrial automation control.

　　3. Reduce operation and maintenance costs:

　　Using wireless remote centralized control, the front-end equipment can be regularly upgraded to realize remote management and control, and reduce later operation and maintenance costs.