PROFIBUS equipment online communication state monitoring method based on NT6000 platform

The invention discloses a PROFIBUS equipment online communication state monitoring method based on an NT6000 platform. A PROFIBUS redundancy slave station actuator communication module, a logic configuration module, a slave station actuator equipment I/O communication module monitoring bit module, a StudioI/O configuration, an I/O module, a PROFIBUS bus equipment communication monitoring module and a DCS operation node are included. By designing a bus communication board equipped with a redundant interface and designing a terminal resistor, a PROFIBUS-DP bus communication cable is connected with a main interface and a slave interface of a slave station, when partial equipment of a main network has a local fault, slave station equipment can be automatically switched from the main interface to the slave interface to collect data, communication of the slave station equipment is ensured not to be interrupted; by arranging the terminal resistor, the communication fault of the equipment in the network segment can b