Advantech 5000 Series - Manual (Page 28)

Chapter 2
Figure 2-8 Build-in Communication Ports for Diagnostic
Connection
Flexible Communication Port Function
Connection(ADAM-5000E only)
The Flexible Communication Port Function prevents ADAM-5000E
from system glitches due to communication line problems.
This function enables simultaneous connections via COM1 and COM2
port of your host PC to the RS-232 and RS-485 port of ADAM-5000E
specifically. While working in conjunction with specific HMI software
(e.g. AFX, FIX) that offers COM Port Backup Function, ADAM-5000E
can circumvent failed communication on one port by switching to
another available port to continue program execution.
ADAM-5000 2-13