Computer control system based on Modbus-TCP

The invention relates to the technical field of remote monitoring based on Modbus-TCP/IP (Transmission Control Protocol/Internet Protocol), and discloses a computer control system based on Modbus-TCP, which comprises a remote client RCrims running remote industrial monitoring system client software and deployed in an industrial production management center, the field server FSrims runs remote industrial monitoring system server software and serves as a master station of a field Modbus bus, and the slave station SSi is deployed on a field control layer; the remote client RCrims is in mutual communication connection with the field server FSries through an industrial Ethernet Modbus-TCP/IP (Transmission Control Protocol/Internet Protocol); an RS-485 serial port of the field server FSries is in mutual communication connection with the slave station SSi through a bus of the Modbus network; the remote industrial monitoring system comprises a client authentication module and a communication information encryption mo