Hello, I am having issues running in TIA V17 with my HMI (KTP700 Basic PN - Version 17.0.0.0) not sending information to the CPU (1215C DC/DC/DC Version 4.5). They are connected physically with an ethernet cord, and both can come online and show an HMI connection as I can transfer my screen design to the HMI successfully. 

However, there is still a lack of data exchange. For example, my thermocouple readings I can read from my Main block while monitoring from my CPU show a value while the same PLC tag connected to the HMI shows "###" meaning improper data exchange. I also tried a known PLC tag with a physical switch connection and put the tag on the HMI as a button with ON/OFF the buttons event and as an input bool value to change the tag neither of these could change the bool value of the input on the CPU. 

There is no memory overlap, and ensured there was no security passwords preventing there communication. 

Any other ideas to try would be greatly appreciated! Thank you!

Hi, 

Try updating the date and time to match the CPU and HMI.

https://www.industry-mobile-support.siemens-info.com/en/article/detail/109820712

Hello AutoGen_2225106

check also the basics:

https://support.industry.siemens.com/cs/de/en/view/89852595

Does it work with simulation?

Bye Murof