Fault resolution of CIP protocol in SCADA system based on the satellite communication and Linux platform

Satellite communication has the function of feedback bandwidth management that is important for the same and reliable data transmission for different remote stations of the same SCADA system. CIP protocol can provide the uniform application layer protocol standard to the physical layer and data link layer that can realize seamless link to application layer. Real-time data transmission with unified open standard data communication interface and Ethernet based on satellite communication can realize data communication between communication server based on remote Linux platform and station-controlled PLC system using CIP protocol. Session can be created and data can be requested between central-controlled MRCI and station-controlled PLC of a certain pipeline. CIP data packets are also encapsulated. However, MRCI can not receive the session. Fault causes are analyzed and the influence of satellite bandwidth rate is excluded. The state opening of Window scaling is the key fault cause. If SCADA system data transmits at satellite bandwidth rate of 8.6 kbps, the function of TCP Window Scaling of centralcontrolled MRCI will be exited.