Mitsubishi Electric MELSEC iQ-R Series User Manual page 560

Error Error name
code
1B43H Redundant
system error
1B48H Extension cable
failure
1B4AH Extension cable
failure
1B50H Parameter error
(redundant
function)
36 ERROR CODES
558
36.4 List of Error Codes
Error details and cause
• 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.
• In a redundant system with redundant
extension base unit, the extension
cable is not connected between the
main base unit of one system and the
extension base unit. Or, the extension
base unit cannot be recognized by the
other system.
(The error is detected in the control
system or the standby system.)
• The extension cables between the
redundant extension base units were
not duplicated at start-up. (The error
is detected in the control system.)
• An error of the extension cable
(inactive side) between the redundant
extension base units has been
detected. (The error is detected in the
control system.)
• In a redundant system with redundant
extension base unit, the module
extension parameter used by the
modules mounted on the extension
base unit is written in the CPU
module. (The error is detected in the
control system or the standby
system.)
Stop/ Action
continue
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.
• Check the system configurations
of both systems and correct them.
• Connect the extension cable
securely and properly to the
connector of the redundant
extension base unit, and then
restart the CPU module in which
the error has been detected. If the
same error code is displayed
again, the possible cause is a
failure of the extension cable.
Replace the extension cable.
Continue • Check the detailed information
(extension cable information) of
the error by executing module
diagnostics using the engineering
tool, and connect additional
extension cables to the extension
cable connectors to duplicate the
extension cables. If the same error
code is displayed again, the
possible cause is a hardware
failure of the CPU module, base
unit, or extension cable. Please
consult your local Mitsubishi
representative.
Continue • Check the detailed information
(extension cable information) of
the error by executing module
diagnostics using the engineering
tool, and connect the extension
cable securely and properly to the
connectors of the base units. If the
same error code is displayed
again, the possible cause is a
hardware failure of the CPU
module, base unit, or extension
cable. Please consult your local
Mitsubishi representative.
Continue • Delete the module extension
parameter from the CPU module
and write it to modules on the
extension base unit.
Detailed Diagnostic
information timing
 Always
Extension At power-on, at
cable RESET
information
Extension Always
cable
information

At power-on, at
RESET, at
STOP  RUN
state