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本文重点对目前工业控制领域广泛应用的PROFIBUD-DP现场总线通讯技术在实际应用时经常出现的通讯干扰问题,进行了分析。对使用RS-485电缆组建的PROFIBUS-DP系统在实际应用时常见的几种干扰类型进行了简要论述,并就几个主要干扰产生的原因及系统安装时避免干扰产生的几个注意要点进行了探讨。
This article focuses on the communication interference problems frequently encountered in the field of practical application of PROFIBUD-DP fieldbus communication technology, which is widely used in the field of industrial control. Several types of interference commonly encountered in the practical application of the PROFIBUS-DP system formed by using RS-485 cables are briefly discussed. The causes of several major interferences and several key points for avoiding interference when the system is installed are also described Discussion.