5 - 9
5.1 Basic Concept of Redundant System
5.1.3 Operation Mode
5
REDUNDANT SYSTEM FUNCTIONS
5.1.3 Operation Mode
The operation mode determines the redundant system operation methods. Following
three operation modes are available.
• Backup Mode
• Separate Mode
• Debug mode
Use GX Developer to switch between the backup mode and separate mode.
Refer to Section 5.3 for switching between the backup mode and separate mode.
Switch the operation mode to the debug mode in the redundant parameter settings.
(1) Backup Mode
The backup mode is for normal operation of redundant system.
If a fault or failure occurs in the control system, the standby system takes over the
control and continues the system operation.
To enable the standby system to continue the system operation when the control
system goes down, the data of the control system must be continuously transferred to
the standby system through the tracking cable.
Refer to Section 5.5, for details on the tracking function.
Diagram 5.8 System Switching Operation in Backup Mode
System A -
Control
System
System B -
Standby
System
System A - Control
System Standby
System
System B - Standby
System Control
System
An error occurred in the
Control System
Calculating Stopping Calculation
End calculation Begin calculating
Tracking cable
Tracking cable
To Next Page
Loading...
