本文以西门子S7-200系列PLC为例讲述了如何用VC++6.0辅助OPENGL设计上位机监控软件,并通过串行通信口与PLC进行数据交换。 关键词:Visual C++;OPENGL;PLC;上位机;串行通信 Abstract:This paper presents how to design monitor software of monitor computer by the example of SIEMENS S7-200 series PLC through VC++6.0 base on OPENGL and exchange data with PLC through COM. Key words:Visual C++;OPENGL;PLC;Monitor computer;Serial communication