Redundant System Operation Setting - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

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]
Window
Displayed items
Item
Watching Standby System Setting
Standby System Output Setting
Backup Mode Setting
Control/Standby Other system Start-
System Start-up up Timeout Setting
Setting
Time-out Period
Control System
Start-up Setting
(Switch Operation)
Control System
Start-up Setting
(Input (X))
Input (X)
37 FUNCTIONS
652
37.6 Redundant System Operation Setting
Description
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.
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.)
Page 645 Operating status, Page 646 Safety operation mode
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.
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.
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.
Setting range Default
• Disable Enable
• Enable
• Disable Disable
• Enable
• Not Set Set
• Set
3 to 1800s (in 60s
increments of 1s)
• Disable Disable
• Enable
• Disable Disable
• Enable

X0 to X2FFF