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6.2 Redundant System Network Overview
6.2.3 Ethernet
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(b) Communication with the Control System/Standby System by MC Protocol or
Data Link Instructions
Even when system switching occurs in a redundant system, communication can
be continued if the communication path is normal.
When the communication cannot be continued the external device develops a
communication error. In this case, review the communication path and restart the
communication.
(c) Communication other than above
When system switching occurs in a redundant system, the external device
develops a communication error occurs.
In this case, review the communication path and restart the communication.
(3) Network Parameter Settings
IP address, station No., and mode of Ethernet are set in [Redundant settings] of the
network parameter in the redundant system.
(a) When mounting to the main base unit
When mounting to the main base unit, set [Network type] as [Ethernet (Main
base)].
(b) When mounting to the extension base unit
When mounting to the extension base unit, set [Network type] as [Ethernet
(Extension base)].
Write the set network parameters to the CPU modules of System A and System B.
*1
Refer to the following manual, for network parameters.
Q Corresponding Ethernet Interface Module User's Manual (Basic)
* 1 : In the debug mode, the CPU module uses the parameters for system A to operate. Therefore, the
station set as system B in the network parameters becomes absent station (disconnected station).
(4) System Startup Order
No restrictions apply to the startup order of system A and system B when connected
to the Ethernet.
Diagram 6.23 Network Parameter Setting Screen
