When transferring a WinCC Unified project from TIA Portal V19.3 to another PC with Runtime, a problem occurs: the visualization opens, but there is no connection to the controller (CPU), although the controller's IP address can be pinged. The project explicitly specifies the PLC IP address, but the connection is not established. After creating a new clean project on the development PC, the connection appears, but after transferring the same project to another PC, it disappears. It seems that Runtime is tied to the device name, even though the IP is specified in the configuration. Advice is needed on the correct way to configure the connection for a stable transfer of the project between PCs.

Hello, Muroff.
Your advice is absolutely correct. I started looking into "higher matters" and forgot about the elementary things.
Everything worked.