6 - 39
6.2 Redundant System Network Overview
6.2.5 Serial Communication Modules
6
REDUNDANT SYSTEM NETWORKS
2) When mounting to the main base unit
Specify the "control system" by MC protocol on each eternal device, and
perform the communication with the control system CPU module.
If the "control system" is specified by MC protocol, communication with the
new control system CPU module can be performed, even when system
switching occurs.
(b) Communication by Nonprocedural Protocol/Bidirectional Protocol
For nonprocedural protocol/bidirectional protocol, communication with external
devices can be performed using the control system CPU module's programs.
Diagram 6.30 Operation for Communication with Control System CPU Module by MC Protocol
MELSECNET/H Remote I/O network
Tracking cable
Control system Standby system
Multiplexed Remote Master Station
Remote I/O module
Serial communication
module
Multiplexed Remote Sub-master Station
System switching
activated
Remote I/O stationRemote I/O station
MELSECNET/H Remote I/O network
Tracking cable
Standby system Control system
Multiplexed Remote Master Station
Serial communication
module
Multiplexed Remote Sub-master Station
Remote I/O stationRemote I/O station
When specifying
control system using
MC protocol
Remote I/O module
When specifying
control system using
MC protocol
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