To remove the connection check to all the TCP in you system devices that are connected to the control system you simply add a few script code lines in system code. NOTE, TCP check only runs when the control system boots, after that nothing happens if a TCP connection are missing.
Do like this: I SYSTEM section select "Show system code" from the menu line and the click on the code block section "Global variables". Here you insert this: #define ARE_WE_USING_IO_KEYBOARD 0
Now close the system code and upload the project to the control system.