摘要
详细介绍了循环冗余校验CRC(CyclicRedundancyCheck)的差错控制原理及其在工业控制中的上位机(计算机)和下位机(S7200PLC)中的实现。其中,上位机用VisualBasic6.0编程,下位机用STEP7Micro/Win编程,利用自由口通信方式来实现数据校验。本文中的系统具备实时显示、历史查询、系统暂停以及准确的信息循环冗余校验功能。
This text introduces the mistake control principle on Cyclic Redundancy Check and its realization in industry control of the place by the computer and PLC in a detail. Among them,the computer uses Visual Basic 6.0 programming,S7 -200 PLC uses the STEP7 - Micro/Win programming,makes use of the free communication method to realize the data school check. The system in this text has the functions of real -time manifestation ,history search ,system pause and accurate information schools of Cyclic Redundancy Check.
出处
《现代电子技术》
2005年第17期98-99,101,共3页
Modern Electronics Technique
