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MELSEC-Q
10 TROUBLESHOOTING
Error code
(Hexa-
decimal)
Error
Error Contents
Signal
name
Corrective action Reference section
There is an error in the designation of the user frame
number.
• Recheck the user frame number.
• Designate the registered user frame
number.
• Register the designated data for
initialization.
Section 3.4.3
Section 3.4.4
Section 3.4.5
7FE1H
There is an error in the designation of the output head
pointer.
• Designate the output head pointer in
the range of 1 to 100.
• Designate the position (n-th position)
where the data for initialization number
is designated.
• Designate the data for initialization
number at the designated position
(n-th position).
7FE2H
There is an error in the designation of the output frame
number.
Designate a registered data for
initialization number within the range of
the designated number of outputs from
the location of the output head pointer.
Section 3.4.5
7FE3
H
There is an error in the designation of the number of
registered data bytes.
• Designate the data for initialization in
the range of 1 to 78.
• Designate 80 for the data for
connection.
Section 3.4.3
Section 3.4.4
7FE4
H
There is an error in the data for connection.
• Recheck the message length of the
message for notification.
Section 3.4.4
7FE5H
There is an error in the designation of the no-
communication interval time.
• Designate the no-communication
interval time in the range of 0 to 120.
Section 3.3.6
7FE8H
The number of remote password mismatch exceeded
the value designated at the address 200D
H.
• Clear the storage area of the
Accumulated count of unlock process
abnormal completion (address: 22FCH)
to 0.
Section 3.3.3
7FE9
H
Modern
function
error
Callback denial exceeded the value designated at the
address 2002
H
CHn
ERR.
• Clear the storage area of the callback
denial accumulated count (address:
22F1
H) to 0.
Section 3.3.4
1 Take corrective action in the following procedure.
1) Check whether the Q series C24, power supply module and CPU module are
mounted correctly on the base unit.
2) Check whether the operating environment of the Q series C24 is within the
general specifications range of the CPU module.
3) Check whether the power supply capacity is sufficient or not.
4) Check whether the hardware of the Q series C24, CPU module and base unit
are normal according to the manuals of the corresponding modules.
If any module is faulty, please contact your local Mitsubishi service center or
representative for repair.
5) If the problem cannot be solved through the above steps, please consult your
local Mitsubishi service center or representative, explaining a detailed
description of the problem.