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4 FUNCTIONS
4.6 RAS
IP address duplication detection
When one network has stations with the same IP address, duplication is detected.
When IP address duplication is detected in the master station (error codes: 1802H, 3021H), change the IP address of the
corresponding station, and power off and on the master station, or reset it.
Detection in each station
When adding a device station, if a station with the same IP address already exists, IP address duplication (error code : 2160H)
is detected in a station to be added, and data link cannot be performed. (Other stations continue data link.)
When a device station that is already connected (linked up) with an industrial switch (for CC-Link IE TSN Class B) is added to
the network together with the industrial switch (for CC-Link IE TSN Class B), an overlapping IP address is not detected in the
station to be added. If IP address duplication (error code: 1802H) is detected in the master station, disconnect the relevant
device station from the network. Otherwise, multiple stations with the same IP address will exist on the same network,
possibly leading to transient transmission being sent to an unintended station.
Detection in the master station
At cyclic transmission startup
If the startup processing of cyclic transmission is executed by powering off and on the master station, when a station with the
same IP address is in the network, IP address duplication (error code: 3021H) is detected in the master station, and data link
cannot be performed.
Cyclic transmission in progress
During cyclic transmission, IP address duplication is regularly checked in the master station. When there are overlapping IP
addresses, IP address duplication (error code: 1802H) is detected in the master station, and cyclic transmission cannot be
performed with the relevant device station. (Other stations continue data link.)
In any of the following combinations, IP address duplication is not detected when cyclic transmission starts up in the master
station.
• Ethernet device and CC-Link IE TSN device
• Ethernet device and Ethernet device
192.163.3.0 192.163.3.1 192.163.3.2 192.163.3.1
192.163.3.0 192.163.3.1 192.163.3.2 192.163.3.1
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