6 - 11
6.2 Redundant System Network Overview
6.2.1 CC-Link IE Controller Network or MELSECNET/H PLC to PLC network
6
REDUNDANT SYSTEM NETWORKS
(3) Redundant System Operation when a Communication Error Occurs in
CC-Link IE Controller Network or MELSECNET/H PLC to PLC Network
(a) Continuation of Data Link via System Switching
When a communication error occurs in CC-Link IE Controller Network or
MELSECNET/H PLC to PLC network, system switching is performed according to
the following procedure so that the data link will be continued.
1) When detecting a communication error, the control system network module
issues a system switching request to the control system CPU module.
2) When receiving the system switching request from the network module, the
control CPU module performs END processing. Through the processing,
system switching is performed.
3) After system switching is completed, the new control system network module
continues the data link.
The standby system network module does not issue a system switching
request even when a communication error occurs in CC-Link IE Controller
Network or MELSECNET/H PLC to PLC network.
To Next Page
Loading...
