你好!我的PLC是SYSMAC C200H CPU01. ALARM ERROR灯亮.LK201和NT631C有数句交换(上传和接收指示灯不停的闪)但是NT631C白屏没有任何显示.按复位钮闪了一下然后仍然如此,拔下电缆显示:SYSTEM INITIALIZING .ALARM ERROR还灯亮.换PORT B口显示:[comm.port a receive error] time-out error occurs while downloading by the following case: *disconnection of the connecting cable *stopped host *incorrect time-out period 我的触摸屏用的时间不长,型号是:NT631C-ST141B-EV1 .LOT NO.0659 出现白屏时，按屏的表面无声音响应,重新上电后仍然如此.请指教.谢谢!