Ethernet connection to Mesa 7i76e disconnecting on its own after one minute

  I ran pnconf wizard and made a configuration for my CNC plasma table. I am able to home and jog my machine for about a minute until I get this error. 
It seems like the ethernet connection is disconnecting on its own somehow. Any ideas on how I could get the ethernet to stay connected so I can use my machine.

Is this possible Plasma/EMI related?

That is, do you still get communication loss when the Plasma source is off?

I don’t think it is Plasma/EMI related. My plasma cutter was not connected or turned on.