Ip Address Duplication Detection - Mitsubishi Electric MELSEC iQ-R Series User Manual

IP address duplication detection

If one network has stations with the same IP address, an overlap is detected.
• When adding a slave station, if a station with the same IP address already exists, IP address duplication detection (error
code: 2160H) is detected in a station to be added and data link cannot be performed. Other stations continue data link.
192.168.3.0
Precautions
• When adding a slave station, which has already been connected (linked up) with a TSN hub and the TSN hub is added to
the network, an overlapping IP address is not detected in a station to be added. If IP address duplication detection (error
code: 1802H) is detected in the master station, disconnect the relevant slave 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.
• 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, Slave IP address duplication (error code: 3021H) is detected in the master station
and data link cannot be performed.
192.163.3.0
• During cyclic transmission, an overlapping IP address is regularly checked in the master station. When there are
overlapping IP addresses, IP address duplication detection (error code: 1802H) is detected in the master station and cyclic
transmission cannot be performed with the relevant slave station. Other stations continue data link.
• An overlapping IP address between an Ethernet device and a CC-Link IE TSN device, and an overlapping
IP address between Ethernet devices are not detected at cyclic transmission startup of the master station.
• Station number duplication is not detected.
Methods of recovery from an overlapping IP address
If IP address duplication detection (error code: 1802H) or Slave IP address duplication (error code: 3021H) is detected on the
master station, change the IP address of the relevant station, and power off and on or reset the master station.
9 FUNCTIONS
198
9.6 RAS
192.168.3.1
192.163.3.1 192.163.3.2
192.168.3.2
192.163.3.1
192.168.3.1