716
APPX
Appendix 1 Error Codes
1B20H System
consistency
check error
(operating
status)
• The operating status of the CPU
module differs between the
systems A and B. (The error is
detected in the standby system.)
Continue • Set the same operating status to the
CPU modules in both systems.
Always
1B21H System
consistency
check error
(safety
operation mode)
• The safety operation mode differs
between the systems A and B.
• Switching of the safety operation
mode is executed for the systems
A and B.
(The error is detected in the standby
system.)
Continue Set the same safety operation mode to
the CPU modules in both systems.
Always
1B40H Redundant
system error
• Both systems were found to be set
as system A or system B when
tracking cables were connected.
(The error is detected in the
control system or the standby
system.)
Continue • Set one system as system A and the
other system as system B by
performing online operation. Then,
restart the CPU modules in both
systems.
Always
1B42H Redundant
system error
• The CPU module operated in
redundant mode was connected
to the CPU module set to process
mode with tracking cables. (The
error is detected in the control
system or the standby system.)
Continue • Read the project stored in the CPU
module operated in redundant mode,
and write it to the CPU module set to
process mode. Then, reset the CPU
module set to process mode, and run it
again.
Always
1B43H Redundant
system error
• The firmware version of the CPU
module connected is not
compatible with the other one.
• The Process CPU and the SIL2
Process CPU are connected.
(The error is detected in the control
system or the standby system.)
Continue • Replace one CPU module with the one
having a firmware version that can be
used with the other CPU module
together, referring to the MELSEC iQ-R
Module Configuration Manual. Then,
restart the system.
• Replace one CPU module in either of
two systems so that the same CPU
module models are used in both
systems. Then, write a project to the
replaced CPU module and restart the
system.
Always
1B60H Standby system
CPU module
error
• In backup mode, the standby
system CPU module has not
started up. (The error is detected
in the control system.)
Continue • If the standby system is powered off,
power on the system.
• If the standby system CPU module is in
the RESET state, clear the RESET
state. If the same error code is
displayed again, the possible cause is
a hardware failure of the CPU module.
Please consult your local Mitsubishi
representative.
Always
1B61H Standby system
CPU module
error
• In backup mode, a stop error of
the standby system CPU module
was detected. (The error is
detected in the control system.)
Continue • Eliminate the error cause, and restart
the system. If the same error code is
displayed again, the possible cause is
a hardware failure of the CPU module.
Please consult your local Mitsubishi
representative.
Always
Error
code
Error name Error details and cause Stop/
continue
Action Detailed
information
Diagnostic
timing
To Next Page
Loading...
