Mitsubishi Electric MELSEC iQ-F Series User Manual page 126

Error code Error name
CFB0H Simple CPU
communication error
CFB1H Simple CPU
communication error
CFB2H Simple CPU
communication error
CFB3H Simple CPU
communication error
CFB4H Simple CPU
communication error
CFB5H Simple CPU
communication error
CFBFH Simple CPU
communication error
10 TROUBLESHOOTING
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10.6 List of Error Codes
Error details and causes
Transmission fails due to retransmission
timeout.
The external device cannot be connected or is
disconnected.
The specified own station port number is
duplicated.
A request to the CPU module fails.
An abnormal response was received from the
external device.
The frame received from the external device is
abnormal.
Simple CPU communication cannot be
performed.
Action
• Check the operation of the external device.
• Check the conditions of the cables, hubs, and routers on the
lines to the external devices.
• Reconsider the communication start wait time.
• Reconsider and correct the IP address and Ethernet address of
the external device.
• Confirm that the external devices have the ARP function, and
communicate with an external device that has the ARP
function.
• When the communication destination is a MODBUS/TCP
connection device and the communication pattern is Write, do
not specify Input or Input Register for the transfer destination
device.
• Check if the connection cable is disconnected.
• Check the conditions of the cables, hubs, and routers on the
lines to the external devices.
Reconsider the port number, and prevent duplication.
• Reconsider the monitor time of the CPU response monitor
timer.
• Reconsider the device/label access service processing setting.
Check the abnormal response code in the buffer memory.
• Check the operation of the external device.
• Check the conditions of the cables, hubs, and routers on the
lines to the external devices.
• Take measures against noise.
• If the same error is displayed after retry, please consult your
local Mitsubishi representative.