Error Code List And Action - Mitsubishi FX3U-?*MR/ES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition

14.6.4 Error Code List and Action

When a program error occurs in the PLC, the error code is stored in the special data registers D8060 to
D8067, D8438, D8449 and D8489, and the error bit turns ON in the special data register D8166 as follows.
Take action based on the following information.
Error PLC operation at
code error occurrence
I/O configuration error [M8060(D8060)]
Ex-
Continues
ample:
operation
1020
Serial communication error 2 [M8438 (D8438)]
⎯
0000
3801
3802
3803
3804
3805
3806
3807
3808
3809
Continues
3812
operation
3813
3814
3820
3830
3840
PLC hardware error [M8061(D8061)]
⎯
0000
6101
Stops
operation
6102
Contents of error
The head number of unconnected I/O device
Example: When X020 is unconnected
1 0 2 0 BCD conversion value
Device number: 10 to 337
1: Input (X), 0: Output (Y)
• 1st to 3rd digits: Device number
• 4th digit: I/O type
(1 = input (X), 0 = output (Y))
Example: When 1020 is stored in D8060
Inputs X020 and later are unconnected.
No error
Parity, overrun or framing error
Communication character error
Communication data sum check error
Communication data format error
Command error
Communication time-out detected
Modem initialization error
N:N network parameter error
N:N Network setting error
Parallel link character error
Parallel link sum error
Parallel link format error
Inverter communication error
Memory cassette write error
Special adapter connection error
No error
Memory access error
Operation circuit error
14 Test Operation, Adjustment, Maintenance and Troubleshooting
14.6 Judgment by Error Codes and Representation of Error Codes
Unconnected I/O relay numbers are programmed.
The PLC continues its operation. Modify the
program, check wiring connection, or add the
appropriate unit/block.
• Inverter communication, computer link and
programming:
Ensure the communication parameters are
correctly set according to their applications.
• N:N network, parallel link, etc.:
Check programs according to the applications.
• Remote maintenance:
Ensure modem power is ON and check the
settings of the AT commands.
• Wiring:
Check the communication cables for correct
wiring.
When the memory cassette is used, check whether
it is mounted correctly.
If the problem persists, something may be
malfunctioning inside the PLC. Consult your local
Mitsubishi Electric representative.
Check connection of the special adapter.
When the memory cassette is used, check whether
it is mounted correctly.
If the problem persists or if the memory cassette is
not used, something may be malfunctioning inside
the PLC. Consult your local Mitsubishi Electric
representative.
Isolate the PLC and supply power to it using a
different power supply.
If the ERROR LED turns OFF, noise may be
affecting the PLC. Take the following measures.
- Check the ground wiring, and reexamine
the wiring route and installation location.
- Fit a noise filter onto the power supply line.
If the ERROR LED does not turn OFF even after
the above actions are taken, consult your local
Mitsubishi Electric representative.
Action
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