S7-200 usb-ppi+ communication cannot read PLC information, display unknown number

~ arcozhang

Showing unknow is a problem with your programming line.
In fact, the software has found the PLC, the site: 1, the baud rate is 9.6kbps.
Your PLC site needs to be set to 1 (manually input or click to display the location of “unknow, 1, .96bps” is automatically set).

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