Mitsubishi Q12PRHCPU - 5.3 The System Switching Function

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5.3 The System Switching Function
5.3.1 System Switching Method
5
REDUNDANT SYSTEM FUNCTIONS
5.3 The System Switching Function
(Switching Between The Control System And The Standby
System)
This section explains the executing system switching while the redundant system is
running, execution timing, execution possibilities, operations of control/standby system
CPU modules and relevant precautions .
5.3.1 System Switching Method
2 methods of system switching are available: automatic system switching and manual
system switching that is performed by the user.
Whether the system switching can be executed automatically or manually depends on the
operation mode. (Refer to Section 5.1.3 for details on operation mode.)
Table5.22 indicates the system switching methods and applicable operation modes.
* 1: System switching can be done from the OPS (application using EZ Socket), too.
Table5.22 System Switching Method and the Applicable Operation Modes
System Switching Method Description Operation Modes
Automatic system
switching
• System switching when a fault occurs in the control system
• System switching by the system switching request issued from
the network module
Backup Mode
Manual System
Switching
• System switching using GX Developer
*1
• System switching by system switching instruction
Backup Mode
Separate Mode