For Use In A Redundant System - Mitsubishi Electric QJ71E71-100 User Manual

5.1.4

For use in a redundant system

When using an E71 in a redundant system, refer to the following.
QnPRHCPU User's Manual (Redundant System)
(1) Mounting an E71 on the main base unit of a redundant system
This section provides information on mounting an E71 on the main base unit of a redundant system.
(a) Basic system configuration
Access can be performed from a connected device to the control system and standby system of a redundant
system.
(b) System configuration with a communication path backed up
Access can be performed from a connected device to the control system and standby system of the redundant
system in the communication path 1 or communication path 2.
If a communication error occurs during access to the control system through the communication path 1
Ex.
(1) in the figure below), the control system can be accessed through the communication path 2 (2) in the
figure below). If a communication error also occurs in the communication path 2, the system switches
between the control system and the standby system, enabling communications with the new system (3) in
the figure below).
Control system
Connected device
Ethernet
network No.1
1) 2)
Standby system
Tracking cable
CHAPTER 5 SYSTEM CONFIGURATION
Ethernet
network No.2
3)
: Communication path 1
: Communication path 2
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