When A Redundant System Is Configured - Mitsubishi Electric MELSEC iQ-R Series User Manual

When a redundant system is configured

The redundant system has not started.
When the redundant system of the remote head module has not started, check the following items.
Check item
Does a moderate error or major error occur in the remote head No.1 and
No.2?
Is the switch of the remote head No.1 and No.2 set to RUN?
Is the D LINK LED of the remote head No.1 and No.2 turned off?
Is the D LINK LED of the remote head No.1 and No.2 flashing?
The systems cannot be switched.
When the systems of the remote head modules cannot be switched even if the system switching cause occurs, check the
following items.
Check item
Has a moderate error or major error occurred in the remote head module of
the standby system?
Is the RUN LED of the remote head module of the standby system off?
Is "Module Operation Mode" under "Network Application Setting" of "CPU
Parameter" set to "Offline" in the remote head module of the standby system?
Is the remote head module of the standby system in the module
communication test status?
Is the remote head module of the standby system being replaced?
Is the D LINK LED of the remote head module of the standby system off or
flashing?
In a redundant line configuration, is the system switching disabled for the
master/local module of the master station on the remote head module side
network of the standby system?
In a redundant line configuration, is the system switching disabled for the CPU
module of the master station on the remote head module side network of the
standby system?
Is the D LINK LED of the new control system turned off?
Action
Perform troubleshooting using LED. ( Page 89 When the ERR LED turns
on or is flashing)
Set the switch of the remote head No.1 and No.2 to RUN.
Perform troubleshooting using LED. ( Page 90 When the D LINK LED
turns off)
Perform troubleshooting using LED. ( Page 90 When the D LINK LED is
flashing)
Action
Perform troubleshooting using LED. ( Page 89 When the ERR LED turns
on or is flashing)
Perform troubleshooting using LED. ( Page 89 When the RUN LED turns
off)
Set "Module Operation Mode" under "Network Application Setting" of "CPU
Parameter" to "Online". ( Page 81 Network Application Setting)
Complete the module communication test if the test is in progress.
Complete the replacement of the remote head module of the standby system.
Perform troubleshooting using LED. ( Page 90 When the D LINK LED
turns off, Page 90 When the D LINK LED is flashing)
Enable the system switching for the master/local module. ( MELSEC iQ-R
CC-Link IE Field Network User's Manual (Application))
Enable the system switching for the CPU module. ( MELSEC iQ-R CPU
Module User's Manual (Application))
Perform troubleshooting using LED. ( Page 90 When the D LINK LED
turns off)
4.6 Troubleshooting by Symptom
4 TROUBLESHOOTING
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