Mitsubishi Q00JCPU User Manual page 245

6
FUNCTIONS
Item
Redundant function
System switching (between control
system and standby system)
function
Operation mode change
Tracking function
Redundant online program change
function
Memory copy from control system
to standby system
Table6.2 CPU module function list (Continued)
Description
This function configures a redundant system including
two sets of CPU modules, power supply modules,
network modules or main base units.
This function switches between the control system and
standby system (switches the control system to the
standby system or the standby system to the control
system).
There are two different methods: system switching and
user switching.
This function changes between the separate mode and
backup mode.
This function is used to share data between the control
system and standby system. (Transfers the control
system data to the standby system.)
If system switching occurs at the time of a control
system failure or error, control can be continued with the
same data.
This function transfers the data, which was written to the
control system by write to PLC or online program
change, to the standby system.
This function copies the program memory contents of
the control system to the standby system.
(When the standby system CPU module is replaced, the
program memory contents of the control system and
standby system can be matched.)
There are two different methods: by GX Developer and
by special relay and special register.
* 1 : Refer to the following manual.
QnPRHCPU User's Manual (Redundant System)
CPU module Reference
1) 2) 3) 4) section
6.1 Function List
1
2
3
*1
4
5
6
7
8
6
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