Dear Expert 

I have the original program of S7-200 smart and unfortunately I forget the password , is any way to know it? any suggestion ?

thanks for your concern 

Hello Osama Elhoseini;

The S7-200 Smart family is unfortunately not supported by Siemens Autmation in Europe, it is a product supported strictly by Siemens India for the South-Asian market. Fortunately, they have given us access to the system manual for these PLCs:

https://support.industry.siemens.com/cs/cn/en/view/109745610

Here is a screensht of the section that tells you what to do if you have lost the PLC password: reset to factory setttings. Look on page 155 to see the procedure for reset to Factory Settings of the S7-200 Smart, and to understand clearly what will happen to your program and data when you do, before you attempt it.

Hope this helps,

Daniel Chartier