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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
38 Error Check Method and Error Code List
38.4 Error Code List and Action
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
38.4 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, D8487 and D8489, and the error bit turns ON in the special data register D8166 as follows.
The following actions should be taken.
Error
code
PLC operation at
error occurrence
Contents of error Action
I/O configuration error [M8060(D8060)]
Ex-
ample:
1020
Continues
operation
The head number of unconnected I/O device
• 1st to 3rd digits: Device number
FX3G/FX3GC:10 to 177
FX3U/FX3UC:10 to 337
• 4th digit: I/O type
(1 = input (X), 0 = output (Y))
Example: When 1020 is stored in D8060
Inputs X020 and later are unconnected.
Unconnected I/O relay numbers are programmed.
The PLC continues its operation. Modify the program,
check wiring connection, or add the appropriate unit/
block.
Serial communication error 2 [M8438(D8438)]
0000 ⎯ No error
3801
Continues
operation
Parity, overrun or framing error
• Ethernet communication, inverter communication,
computer link and programming:
Ensure the parameters are correctly set according to
their applications.
• N:N network, parallel link, MODBUS communication,
etc.:
Check programs according to applications.
• Remote maintenance:
Ensure modem power is ON and check the settings of
the AT commands.
• Wiring:
Check the communication cables for correct wiring.
3802 Communication character error
3803 Communication data sum check error
3804 Communication data format error
3805 Command error
3806 Communication time-out detected
3807 Modem initialization error
3808 N:N network parameter error
3809 N:N Network setting error
3812 Parallel link character error
3813 Parallel link sum error
3814 Parallel link format error
3820 Inverter communication error
3821 MODBUS communication error
3830 Memory access error
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.
3840 Special adapter connection error Check connection of the special adapter.
PLC hardware error [M8061(D8061)]
0000 ⎯ No error
6101
Stops
operation
Memory access error
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.
6102 Operation circuit error
Isolate the PLC and supply power to it using a different
power supply.
If the ERROR(ERR) 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(ERR) LED does not turn OFF even after
the above actions are taken, consult your local Mitsubishi
Electric representative.
1 0 2 0
1: Input (X), 0: Output (Y)
Device number
Example: When X020 is unconnected
BCD conversion value