Error Code List - Mitsubishi Electric MELSEC-Q Series User Manual

10.5

Error Code List

The following table lists the error codes of the master module.
Error code
0064 to 0067
H H
0068
H
00C8
H
00C9
H
Error description
Master module hardware error
CPU module stop error
Transmission cable voltage drop
error
DP/DN short error
Corrective action
A malfunction has been detected in the master module hardware.
Reset the CPU module, or power off and on the system.
If the error occurs again, the master module may be in failure. Please
consult your local Mitsubishi representative.
A stop error has occurred in the CPU module.
Check and correct the error using the PLC diagnostics of the
programming tool.
The voltage of the 24VDC external power supply may be insufficient.
Perform the following:
• Adjust the power supply voltage of the 24VDC external power
supply within the rated value (21.6VDC to 27.6VDC). (The
recommended voltage is 26.4VDC.)
• Check that the power cables (24V, 0V) are not disconnected or
short-circuited.
• When crimping the link connector, check that the pin layout is
correct.
• Check that the 24VDC external power supply is properly
connected to the terminal blocks of the master module and the
slave module.
• Check that there is no short circuit or incorrect wiring and screws
are tightened sufficiently.
There may be a short in the transmission cables (DP, DN) or the
current supplied through the transmission cables (DP, DN) is over the
maximum allowable value. Perform the following:
• Check that the transmission cables (DP, DN) are not short-
circuited.
• When crimping the link connector, check that the pin layout is
correct.
• Check that the transmission cables (DP, DN) are not in contact with
each other and that there is no incorrect wiring in the terminal block
wiring of the master module and the slave module.
• Correct the cables (wire diameter, total length) and modules (type,
the number of connected modules) so that the current
consumption of all the slave modules does not exceed the
transmission cable supply current of the master module. (
Page 26, Section 3.2.1, Page 47, Section 6.2.3)
CHAPTER 10 TROUBLESHOOTING
10
95