6
REDUNDANT SYSTEM NETWORKS
6.2 Redundant System Network Overview
6.2.5 Serial Communication Modules
6 - 38
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
(1) Communication between External Devices and Control System CPU
Module
(a) Communication by MC Protocol
1) When mounting to the extension base unit
There are restrictions on the connection destination depending on the
command from the external device to MC protocol.
(Appendix 7 (1))
In addition, when system switching occurs, the communication timeout will
occur since both old system and new system cannot respond. Therefore,
perform retry processing by MC protocol.
Diagram 6.29 Operation for Communication with Control System CPU Module by MC Protocol
Tracking cable
Control system Standby system
Serial communication
module
Serial communication
module
When specifying control
system using MC protocol
Extension cable
Extension cable
System switching
activated
Control system Standby system
Tracking cable
When specifying control
system using MC protocol
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