Mitsubishi Electric MELSEC iQ-R Series User Manual page 221

Error Error definition and causes
code
C844H Incorrect frame was received.
• Unsupported command
C900H Communication failed.
C901H The size of the request data to the external
device or response data from the external
device exceeds the range supported for
communications.
C902H Communication was interrupted because no
response was returned from the external
device.
C903H Failed to send request to the external
device.
CF40H Incorrect frame was received.
CF41H Incorrect frame was received.
CF42H Incorrect frame was received.
CF43H An error has occurred.
CF44H Incorrect frame was received.
D03BH The operating status of the CPU module is
not in STOP state (excluding a stop error),
and enabling remote device test function
failed.
D03CH The own station is not set as a master
station and enabling remote device test
function failed.
D0A3H Send processing of the transient
transmission has failed.
Action
• Replace the network module with a module of the version supporting the
function that has been executed.
• If the error occurs again even after taking the above, please consult your
local Mitsubishi representative.
Do not execute communication from multiple engineering tools to the same
master station simultaneously.
Correct the size of the request data or response data to within 1500 bytes.
Execute the communication test, and if the test was completed with an error,
take corrective action.
• Correct the IP address of the external device.
• Check if the subnet mask of the external device matches the master
station.
• Check if the communication speed matches the communication speed of
the external device.
• Check if the cables are properly connected and that there is no error.
• Check the operating status and connection status of the target device.
• Check the connection of the Ethernet cable and switching hub.
• Check the line status of Ethernet.
• Reset the CPU module and target device, and retry the operation.
If the above actions do not solve the problem, contact the manufacturer of
the target device.
• Check the operating status and connection status of the target device.
• Check the connection of the Ethernet cable and switching hub.
• Check the line status of Ethernet.
• Reset the CPU module and target device, and retry the operation.
If the above actions do not solve the problem, contact the manufacturer of
the target device.
• Check the operating status and connection status of the target device.
• Check the connection of the Ethernet cable and switching hub.
• Check the line status of Ethernet.
• Reset the CPU module and target device, and retry the operation.
If the above actions do not solve the problem, contact the manufacturer of
the target device.
• Check the operating status of the external device.
• Check if there is any error in the line status.
If the above actions do not solve the problem, contact the manufacturer of
the target device.
• Check the operating status and connection status of the target device.
• Check the connection of the Ethernet cable and switching hub.
• Check the line status of Ethernet.
• Reset the CPU module and target device, and retry the operation.
If the above actions do not solve the problem, contact the manufacturer of
the target device.
Switch the operating status of the CPU module to STOP state (excluding a
stop error), and enable the remote device test function.
Enable the remote device test function in the master station.
• Check the network status using the CC-Link IE TSN/CC-Link IE Field
diagnostics of the engineering tool, and take action.
• When the own station, target station, or relay station detected an error,
identify the cause of the error and take action.
• Correct the target station number of transient data, and retry the
operation.
• When the access destination is a module with a different network number,
check if "Routing Setting" of "CPU Parameter" is correctly set.
Detailed
information 1
Detailed
information 2













4 TROUBLESHOOTING
219
4.5 List of Error Codes
4