Network redundancy communication system

According to the network redundancy communication system disclosed by the invention, each chip can be designed by adopting a nationwide device, so that complete autonomy and controllability are realized. In the multi-network card mode, each network can use the same IP address, and when one network fails, the other network can continue to undertake a communication task. And in the PRP mode, one electric port communication network and two optical port networks are provided. The electric port and the optical port are mutually independent and can be independently configured with an IP, and when the optical port sends information, if one optical port breaks down, the other optical port can ensure that data does not lose packets in the transmission process and continues to undertake a communication task. The dual-network card mode and the PRP mode are freely switched, so that the use requirements of more complex and severe environments can be met. And network redundancy design of special industries can be realized.