Omron Sysmac NJ-series

15 Troubleshooting
15-40
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
* This event code occurs for unit version 1.10 or later of the CPU Unit.
Event name IP Address Duplication Error Event code 840A0000 hex*
Meaning The same IP address is used more than once.
Source EtherNet/IP Function Module Source details Communications
port 1 or 2
Detection
timing
After link is estab-
lished
Error attributes Level Minor fault Recovery Automatic recov-
ery
Log category System
Effects User program Continues. Operation EtherNet/IP communications are not possible for the rele-
vant communications port. Packets addressed to the local
IP address of the relevant communications port are dis-
carded.
Indicators EtherNet/IP NET RUN EtherNet/IP NET ERR EtherNet/IP LINK/ACT
OFF Flashes at 1-s intervals. ---
System-defined
variables
Variable Data type Name
_EIP1_IPAdrDupErr BOOL Port1 IP Address Duplication Error
_EIP2_IPAdrDupErr BOOL Port2 IP Address Duplication Error
Cause and
correction
Assumed cause Correction Prevention
The IP address of the built-in Ether-
Net/IP port is also used as the IP
address of another node.
Perform either of the following and
then cycle the power supply to the
Controller or reset the Controller.
• Check the IP addresses of other
nodes and correct the IP address
settings so that the same address is
not used by more than one node.
• Remove the node that has the
duplicate IP address from the net-
work.
Perform allocations so that IP
addresses of nodes on the network
are used for only one node.
Attached
information
Attached information 1: Duplicated IP address (example: C0A8FA01 hex = address 192.168.250.1)
Precautions/
Remarks
A duplicated address error occurs if an ARP is sent with the set IP address and there is an ARP response.