Emerson Process Management ControlWave EFM 3808 - Manual (Page 131)

CI-ControlWave EFM Service / 3-15
Figure 3-9 - RS-232 Loop-back Plugs
Figure 3-10 - RS-485 Loop-back Plugs
Figure 3-11 - WINDIAG’s Communications Diagnostic Menu
1. Type "1," "2," "3," or "4" for the port to test.
2. Set baud rate to test to 115200 baud or ALL ASYNC and the number of passes to 5.