Spent some more time today on the issue of forcing the control unit to use the wired ethernet connecction with a WiFi module installed.
I finally found a way to set the firmware settings which will control whether or not Ethernet will be used if connected with the WiFi module installed. (My last post inaccurately called the setting Eth-Type, but I was referring to the IP INTERFACE setting)
My findings:
1. If the IP INTERFACE option is set to ETHERNET, only a wired connection will be used even if wireless unit is installed
2. If the IP INTERFACE option is set to AUTO, and Eth-Type is set to AUTO, it will not use the ETHERNET interface if it is attached. I have removed the antenna for this test, but it still 'sees' my wireless Access Point, but too weak to connect? I cannot confirm that in the ABSENCE of a WiFi AP it will refuse to use the Ethernet interface.
3. If the IP-INTERFACE option is set to AUTO, and Eth-Type is set to AUTO-PREFER 10mbit, it WILL use the ETHERNET interface if it is attached, even in the presence of a WiFi AP.
So, at least I have found a way to use the wired interface without having to remove the WiFi module which was the only option I had before today.
Hope this helps someone else!
73 Kevin K7ZS