How can I change connection between plc and wincc flexable 

without having the original copy ?

Hi Ali,

Can you be more elaborate about your requirement? Maybe I can help you,but now I can't understand your question.

Thanks,

Jay

Please see how you can change connection of a HMI without having a software. Not sure what HMI you are using so with limited info thats what found best related to your problem.

https://support.industry.siemens.com/cs/ww/en/view/67653385