本文介绍了采用VB语言编程，利用CAN现场总线技术以及华控RSM智能模块搭建分布式监控系统的逻辑结构，采用CAN2.0通讯协议实现上位机与模块的数据通信。详细介绍了RSM04隔离型脉冲输入计数器模块与上位计算机的连接与通讯实现。在实验过程中模拟了信号发生源，其发出的信号经模块采集后送至上位机，执行计数值程序后，可以读取计数结果。-This paper introduces the use of VB programming language, the use of CAN field bus technology and intelligent module RSM Hua control structures distributed control system logic structure, the use of communication protocols CAN2.0 realize Between PC and data communications module. Details RSM04 Counter Pulse Input Isolated Module and Host Computer realize the connection and communication. In the experiment to simulate the signal source, the signals collected by the module to the host computer, the implementation of numerical procedures, which can be read by the result of the calculation.