Port group setting
This setting ensures that, by using two RJ71EN71 Ethernet ports, even if a communication error occurs in one of the ports, as
long as communication is possible on the other port, systems are not switched and communication by the control system
This function cannot be used when "Q Compatible Ethernet" is selected in the network type.
Set conditions for issuing a system switching request in the module parameters.
Set the port group in "Redundant System Settings" under "Application Settings". ( Page 276 Redundant System Settings)
• When "Switch Systems When a System Switching Error Occurs in Both of Port 1 and Port 2" is selected for
"Port Group Setting", an event at the time of system switching is registered into the event history of the P1
• Set the same value for the port group setting on the P1 side and P2 side each.
• The redundant group setting is enabled when the RJ71EN71 issues a system switching request. When a cause other than
a moderate/major error or hardware failure in the RJ71EN71, or a system switching request from the RJ71EN71 occurs,
systems are switched regardless of this setting.
• In "Redundant System Settings" under "Application Settings", set "Enable" for either "System Switching Request Issuing at
Disconnection Detection" or "System Switching Request Issue at Communication Error". If both settings are set as
"Disable", systems are not switched because a system switching request is not issued to the CPU module.
1.17 Redundant System Function