PROFIBUS-DP现场总线通信转换接口的设计

DESIGN OF PROFIBUS COMMUNICATION CONVERSING INTERFACE

介绍了PROFIBUS-DP专用芯片SPC3的结构及主要性能,从开发的角度阐述了PROFIBUS-DP现场总线从站通信接口硬件、软件的设计,在硬件电路中将硬件电路设计成SPC3与单片机的连接、存储器的扩展、PROFIBUS-DP接口电路、复位电路、RS485接口电路、供电电源6个部分.在软件设计上,介绍了PROFIBUS-DP状态机、各种通信报文的实现、GSD文件的编写等.

In this paper, the special center SPC3 of PROFIBUS-DP is introduced. Also the design of the hardware and software for PROFIBUS salve communication interface is discussed in detail. The hardware include connection diagram of SPC3 with single-chip and extend memory and circuit of PROFIBUS DP interface and circuit of reset and circuit of RS-485 interface and circuit diagram of power. In the design of software, SPC3 state machine and realization of each communication message and compiling GSD files are finished.