For further programming of the 6K, you can connect to serial port 2 of the 6K even with the Motion Panel connected. When you enter the terminal screen with the Motion Panel connected you will see a lot of scrolling carrots and sometimes question marks. These are the response of the 6K to commands sent down by the Motion Panel. The occasional question marks occurs when a command sent down from the Motion Panel which is designed for a 6K8 is received on something other than a 6K8, like a 6K4.
To eliminate the scrolling carrots, enter these commands while connected to serial port 2 on the 6K:
This will eliminate the scrolling carrots by disabling the carrot return.