一种ISA总线转CAN总线接口的实现方法  

An Implementation Method of ISA Bus to CAN Bus Interface Converter

作　　者：张锐[1] 周晓华[1] 牛德青[1] 刘伟[1] 

机构地区：[1]中国兵器工业第58研究所军品部,四川绵阳621000

出　　处：《兵工自动化》2011年第3期81-82,93,共3页Ordnance Industry Automation

基　　金：核电站辐射监测与管理系统(200683)

摘　　要：CAN总线在分布式控制系统中有着广泛的应用,而ISA是经典的工业控制总线,为实现两种总线间的通信,设计了一种ISA总线向CAN总线转换的接口电路。阐述其实现原理,提出完成时序匹配和转换需满足的条件,对CPLD内部逻辑进行分析,并给出ISA时序分析框架图。结果表明,该方法运行稳定、可靠,在实际应用中可下挂30个CAN节点,有一定的工程参考价值。CAN bus is widely used in distributed control system.ISA is a classic industrial control bus.In order to achieve communication between two buses,design an ISA bus interface to CAN bus conversion circuit and describe the implementation principle of matching and the proposed conversion to be completed to meet the timing conditions.After the analysis of CPLD internal logic analysis,the framework time sequence analysis diagram is given.The result shows that the method is stable and reliable.It can be linked to 30 nodes in the practical applications and has the certain value of engineering.

关 键 词：CAN ISA SJA1000 

分 类 号：TN911.72[电子电信—通信与信息系统]