Communication system and method for electric engineering machinery, upper computer and vehicle control unit

The embodiment of the invention provides a communication system and method for electric engineering machinery, an upper computer and a vehicle control unit, and relates to the technical field of electric engineering machinery. The communication system comprises a vehicle control unit and an upper computer. And an application layer of the upper computer generates interaction data based on an ISO14229-1 diagnosis protocol. The network layer splits CAN frames based on an ISO15765-2 protocol. And the data link layer maps the address information of the diagnosis protocol based on the SAEJ1939 protocol. And the CAN physical layer sends a CAN message based on an ISO 11898 protocol. The CAN physical layer of the vehicle control unit is based on an ISO 11898 protocol and receives a CAN message. And the data link layer matches a corresponding CAN identifier based on an SAEJ1939 protocol. And the network layer is based on an ISO15765-2 protocol and obtains interaction data. And the application layer calls a correspondin