Mitsubishi Electric Q80BD-J71GP21-SX User Manual page 224

APPENDICES
App
- 7 Appendix 1 Precautions for Accessing Redundant CPU System
2) Access examples of path switching
The following shows examples of path switching during access to the control
system.
<When system switching occurs due to communication error>
CC-Link IE Controller Network
Connection to the
control system
Personal computer
(CC-Link IE Controller
Network board)
CC-Link IE Controller Network
Connection to the
control system
Personal computer
(CC-Link IE Controller
Network board)
CC-Link IE Controller Network module
MELSECNET/H module
Control system
CC-Link IE Controller Network module
MELSECNET/H module
Standby system
Figure 1 Path switching example 1
MELSECNET/H
Communication
error
Standby system
Tracking cable
MELSECNET/H
Control system
Tracking cable