Therefore, a datagram receiver is designed for the monitor and categorization of any datagrams transfering in the fieldbus based on the Profibus data-link layer protocol.

• 因此在分析Profibus链路层协议的基础上,设计了一种基于CPLD的可随时监测总线上传输的报文并将其分类的Profibus-DP报文接收器。