Transactions of Materials and Heat Treatment

Title：High speed acquiring method of float data based on WinCC

Authors： Xu Hongtao Tan Jianping Yang Jun Zeng Le

Unit： Central South University

KeyWords： high speed acquisition float WinCC PLC

ClassificationCode：TH-39

year,vol(issue):pagenumber：2015,40(3):122-126

Abstract：

The monitoring system in industrial field is mainly comprised of WinCC system and programmable Logical Controller(PLC). For the problem that the refresh frequency of WinCC can not satisfy high speed data acquisition in this system, a new method of high speed data acquisition method based on WinCC was presented based on the features of WinCC and PLC. Firstly, all data was acquired by PLC and stored in DB in proper sequence, and the data was floated without rounding. Then multi external variables corresponding to process variables in DB were established in WinCC system, and global script written by C language acquired all the data in the DB. Winll was changed from collecting a data once a time to collecting multiple data in once, so the high speed data acquisition was achieved indirectly. The experiments were implemented, and the results show that this method can solve the problem of the low speed data acquisition of WinCC. The method not only guarantees the precision of data acquisition, but also can be applied comprehensively. The high speed data communication through a reliable, convenient and low-cost way is suitable for both the upper and lower controlling systems.

Funds：

国家重点基础研究发展计划（“973”计划）项目(2014CB049405);高性能复杂制造国家重点实验室自主探索基金（zzyjkt2013）

许洪韬（1989-），男，硕士研究生通讯作者：谭建平（1963-），男，博士，教授，博士生导师

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