6
REDUNDANT SYSTEM NETWORKS
6.2 Redundant System Network Overview
6.2.5 Serial Communication Modules
6 - 40
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
TRACKING CABLE
4
PROCEDURE FOR
STARTING UP A
REDUNDANT SYSTEM
5
REDUNDANT SYSTEM
FUNCTIONS
6
REDUNDANT SYSTEM
NETWORKS
7
PROGRAMMING
CAUTIONS
8
TROUBLESHOOTING
(2) Communication between External Devices and the Standby System CPU
Module
(a) Communication by MC Protocol
Specify the "standby system" by MC protocol on each external device, and
perform the communication with the control system CPU module. If the "standby
system" is specified by MC protocol, communication with the new standby system
CPU module can be performed, even when system switching occurs.
Communication can be performed by MC protocol only.
Diagram 6.31 Operation for Communication with Standby System CPU Module by MC Protocol
MELSECNET/H Remote I/O network
Tracking cable
Standby system Control 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
When specifying
standby system using
MC protocol
MELSECNET/H Remote I/O network
Tracking cable
Control system Standby system
Remote I/O module
Serial communication
module
Multiplexed Remote Master StationMultiplexed Remote Sub-master Station
Remote I/O stationRemote I/O station
When specifying
standby system using
MC protocol
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