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NI usb6501 使用问题

使用6501过程中经常出现弹出 NI Max 信息管理窗口,类似发现新的NI 设备6501,导致软件使用终止。(检查过HUB供电等情况,未见异常) 系统使用VB 输出pio命令控制6501,在控制relay,有时会导致pio全部打开relay卡所有通道置高,无法控制。【请大神给点分析建议,谢谢】

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