Troubleshooting/Service 
330  UDC3500 Universal Digital Controller Product Manual  3/07 
7.7.10  Procedure #10 – Ethernet 
Table 7-14 explains how to troubleshoot an Ethernet Communications failure. 
Table 7-14  Troubleshooting an Ethernet Communications Failure 
Step  What to do  How to do it 
1 
Check for lower display 
diagnostic messages 
•  If the lower display is showing the 
diagnostic message “EUNPLGED” 
(Ethernet Unplugged), then this means 
that the Ethernet cable is unplugged, the 
unit is improperly connected to the 
network or that the Ethernet network itself 
is bad. See Section 
2.7 for wiring 
diagrams. If the unit is properly connected, 
then check the Ethernet network for 
functionality. 
• 
If the lower display is showing the 
diagnostic message “ENET DEF” 
(Ethernet Default) then this means that the 
instrument is set for the factory default IP 
address of 10.0.0.2. This will appear when 
the Ethernet parameters have failed (both 
working and backup copies). See Section 
3.30 and re-configure the Ethernet settings 
with the P.I.E. Tool. 
• 
If the lower display is showing the 
diagnostic message ”EBRDFAIL” 
(Ethernet Board Failure) then this means 
that there has been a failure on the 
Ethernet Communications Board. Go to 
step 3. 
2 
If none of the above diagnostic 
messages are present, then 
check the IP address, Subnet 
Mask address and Gateway 
address settings. 
As shipped from the factory, all units are 
configured for an IP address of 10.0.0.2. The 
MAC address is printed on the product label 
located on the instrument’s case. Configure 
the Ethernet and Email settings with the P.I.E. 
Tool. See Section 
3.30. 
3 
Change Ethernet 
Communications board. 
Installation instructions provided with new 
board. 
ATTENTION
 The replacement Ethernet 
Communications board will have a label 
showing its MAC address. To avoid confusion, 
it is strongly recommended that you change 
the MAC address shown on the label on your 
instrument’s case to be the same as the MAC 
address shown on your new board. 
4 
Change Controller