HDLC communication module for CompactRIO

The utility model relates to an HDLC communication module for a CompactRIO. The HDLC communication module includes an HDLC communication module and a CompactRIO real-time controller. A bridge chip developed by using an FPGA, an EERPOM with a memory storing function, a serial converter chip and R485 interface chips are included in the HDLC communication module. An RS485 protocol is used as a physical layer of communication, data exchange is achieved through a custom SPI bus, and an external two-way communication interface is used for achieving a two-way HDLC protocol communication function and supports an adjustable range of communication baud rate with the maximum of 10M. The module is a controller combined with an embedded control system, and is used for communication interconnection between an urban rail transit train monitoring system and a subsystem with an HDLC interface. The utility model can be widely applied in the control field of railway trains, urban rail transit vehicles and the like. The HDLC com