Mitsubishi Electric MELSEC iQ-R-R00CPU, User Manual

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APPX
Appendix 1 Error Codes
771
A
4202H Online module
change function
error • The request cannot be executed because the specified
module is being changed online.
• Execute the request again after the online module change
processing ends.
• If the online module change operation cannot be completed,
power off the system, and change the module.
421DH Online module
change function
error • Redundant operations cannot be performed because the
redundant function module is being changed online.
• Perform redundant operations after the online module
change processing ends.
4240H Redundant
system related
error Any of the following operations is requested to the CPU
module in the standby system, but cannot be performed
because they are not supported.
• Operation mode change
• System switching
• Memory copy from control system to standby system
• Control system forced start-up while waiting for a start-up of
the other system
• External input/output forced on/off function
• Perform these operations to the CPU module in the control
system.
4241H Redundant
system related
error Data communications cannot be performed with the other
system because of any of the following reasons:
• The CPU module of the other system is powered off or in a
reset state.
• The tracking communication stops due to an error in the
CPU module of the own or other system.
• Tracking cables are disconnected or incorrectly connected,
or failed.
• The redundant function module of the own or other system is
being changed online, a module communication test is being
performed for the module, or a hardware failure has
occurred in the module.
• System A/B has not been determined in the CPU modules.
• If a WDT error has occurred in the CPU module of the own
or other system, eliminate the error cause and then execute
the operation again.
• Set the own system as system A or B and the other system
as the other.
• Check that there is no error or failure in the CPU module,
tracking cables, redundant function modules, and perform a
retry. Or, perform a retry after the online module change
processing or the module communication test ends. If the
same error code is displayed again, the possible cause is a
hardware failure of the CPU module, redundant function
module, base unit, or tracking cable. Please consult your
local Mitsubishi representative.
4243H Redundant
system related
error • The request cannot be executed because a stop error has
occurred in the CPU module of the standby system.
• Check the stop error, eliminate the error cause, and then
execute the request again.
4244H Redundant
system related
error • The request cannot be executed because the operating
status of the CPU module in the control system differs from
that of the CPU module in the standby system.
• Match the operating status of the CPU module between the
systems, and execute the request again.
4246H Redundant
system related
error • The request cannot be executed because the operation
mode is being changed or the systems are being switched.
• Execute the request again after the operation mode change
processing or the system switching processing ends.
4247H Redundant
system related
error • The request cannot be executed because the memory copy
function is being executed.
Execute the request again after the memory copy processing
ends. The completion status can be checked in the following
special relay areas.
• SM1654 (Memory copy being executed): Off
• SM1655 (Memory copy completion): On
4248H Redundant
system related
error Data communications cannot be performed with the system
specified as a connection destination (request destination
module I/O number) because of either of the following
reasons:
• The request was issued during the system switching
processing.
• The system specified as a connection destination (request
destination module I/O number) does not exist.
Check the following, and execute the request again.
• The system switching processing has completed.
• The redundant system has started up successfully.
• When the memory copy with the special relay and special
register is used, 03D1H (Standby system CPU module) is
stored in SD1653.
4249H Redundant
system related
error • The request cannot be executed because the system setting
(system A or B, control system or standby system) has not
been determined.
• Set one system as system A or control system and the other
system as system B or standby system, and execute the
request again. Or, do not specify any connection destination
system (request destination module I/O number), and
execute the request again.
424AH Redundant
system related
error • The request cannot be executed because the system A,
system B, control system, or standby system is set as a
connection destination (request destination module I/O
number).
• Do not specify any connection destination system (request
destination module I/O number), and execute the request
again.
424BH Redundant
system related
error The request cannot be executed because system switching is
disabled because of either of the following reasons:
• SM1646 (System switching by a user) is off.
• The DCONTSW instruction is being executed.
Perform either of the following operations to enable system
switching, and execute the request again.
• Turn on SM1646 (System switching by a user).
• Execute the ECONTSW instruction.
Error
code Error name Error details and cause Action