WInCC Professional RT V17 Communication with s7-1200 PLC

Hello everyone, I hope you are doing great!
I am facing a problem while communicating my WinCC Professional SCADA with the S7-1200 1215C DC/DC/DC 215-1AG40-0XB0CPU.

When I try to communicate with my SCADA with 1215C CPU it doesn't communicate. But when I try to communicate the same project file with 1214C DC/DC/RLY 214-1HG40-0XB0 CPU by matching the date and time of CPU with PG/PC it communicates. But it isn't working with 1215C CPU.

I have cross-checked each and everything my PG/PC communication protocols each and everything is alright. What could be the problem behind it? Kindly help me, I will be very thankful to you. 

My cpu firmware version is 4.5.0

Hello;

I believe you should read Murof's post once more:

"Which Upd do you use for your TIA V17? and which exact Version (with Upd) do you have installed of your WinCC RT Professional?"

Hope this helps,

Daniel Chartier