652
37 FUNCTIONS
37.6 Redundant System Operation Setting
37.6 Redundant System Operation Setting
Set the redundant system operation of a system using the SIL2 Process CPU in the redundant settings of the CPU parameter.
[CPU Parameter] [Redundant System Settings]
Item Description Setting range Default
Watching Standby System Setting Set this item not to detect continuation errors when:
• A communication error with the other system has occurred or
communications with the other system have been disabled.
• The standby system CPU module is off or has been reset, or a stop
error has occurred.
This item is enabled only for the control system CPU module.
• Disable
• Enable
Enable
Standby System Output Setting Set this item to enable the output (Y) from the standby system for
system inspection or adjustment in the standby system.
• To diagnose devices that are connected to the standby system by
using a both systems execution program, set "Enable". However, set
the standby system output setting to "Disable" when common
devices have been connected to both the control system and
standby system.
• When "Enable" is set, do not specify outputs (Y) to be used in the
standby system as the data to be tracked. If such an operation is
performed, the outputs (Y) are overwritten with the control system
data and output from the standby system. (Even though the standby
system CPU module is in the STOP state, the output (Y) received in
tracking transfer is output.)
• Disable
• Enable
Disable
Backup Mode Setting Page 645 Operating status, Page 646 Safety operation mode
Control/Standby
System Start-up
Setting
Other system Start-
up Timeout Setting
Set a timeout time taken until communications with the other system
are enabled after the own system is started up and the initial
processing is completed.
• When "Set" is selected, a stop error will occur in the own system
unless communications are performed with the other system even
though the timeout time has come.
• When "Not Set" is set, the own system will wait until communications
with the other system are established.
•Not Set
•Set
Set
Time-out Period 3 to 1800s (in
increments of 1s)
60s
Control System
Start-up Setting
(Switch Operation)
Set this item to enable the operation to be started in the control system
with the switch operation (RUN STOP RUN) while the own
system that has started is waiting for the start-up of the other system.
• Disable
• Enable
Disable
Control System
Start-up Setting
(Input (X))
Set this item to enable the operation to be started in the control system
with the contact input (X) while the own system that has started is
waiting for the start-up of the other system.
• Disable
• Enable
Disable
Input (X) X0 to X2FFF
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