How to upload backup program from op7 to my pc

oh, then you can either make or buy a 25-pin to 9-pin adapter...if your PG has a 25-pin serial port.

Hello Sigmadelta,
Your above idea my problem has been solved.I uded 25/9 pin serial port adaptor at simatic pg side and I observed Protocoll error 0003 is not coming any more and upload and download the program successful.
My mistake was using usb serial converter.Which was not working.
Thank you.You are really such as nice person.I wishing best of luck.
Kind regards.
ju
 

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