12   Troubleshooting
12 - 34
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
Cause and 
correction
Assumed cause Correction Prevention
An NX Unit that is registered in the 
Unit configuration information is 
not connected.
Connect the NX Units that are 
registered in the Unit configuration 
information.
Or, connect the Support Software, 
unregister the unconnected NX 
Unit from the Unit configuration 
information, and download the 
Unit configuration information to 
the Communications Coupler Unit.
Download the Unit configuration 
information that contains the actu-
ally connected configuration to the 
Communication Coupler Unit.
A connected NX Unit does not 
agree with the NX Unit that is reg-
istered in the Unit configuration 
information.
Connect the NX Units that are 
registered in the Unit configuration 
information.
Or, connect the Support Software, 
change the Unit configuration 
information to reflect the actually 
connected NX Units, and 
download the Unit configuration 
information to the 
Communications Coupler Unit.
An NX Unit that is not registered in 
the Unit configuration information 
is connected.
Remove the NX Unit that is not 
registered in the Unit configuration 
information.
Or, connect the Support Software, 
add the unregistered NX Unit to 
the Unit configuration information, 
and download the Unit 
configuration information to the 
Communications Coupler Unit.