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10-07-2011 02:10 AM
想让施耐德plc作为从站 上位机编写通讯程序读取plc里面的数据 在施耐德自带的《使用技巧文集》里面有一个例子 是用VB实现MODBUS串行通讯的 如图 我理解其中的%MW10就是对应地址0010 我用自己编写的程序读取其中的数据 用总是出现错误-1073807253 我也设置了延时和VISA CLEAR 仍然不能解决问题 我不知道自己是哪里错了 希望各位大神帮忙
10-11-2011 10:26 AM
如果通过Modbus，你有没有试过使用LabVIEW的Modbus驱动程序，见下面的链接。
http://zone.ni.com/devzone/cda/epd/p/id/4756
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