s7-200 plc software version STEP 7 MicroWIN SP6. PG/PC interface setting: PC/PPI cable(PPI), tried both baud rates 9.6 and 19.2, the PC side is connected to the USB port, the s7-200 side is connected to the Port0 port, and communication is not possible
The USB cable needs to install the driver.
When the USB cable is plugged into the computer, whether a new port appears
If it is installed, the port can appear automatically;
When connecting: select the port of the USB cable, it will automatically search in STEP 7 MicroWIN SP6
but this version don’t need install 6ES7901-3DB30-0XA0 driver