Error Code List And Action - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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
and D8449, and the error bit turns ON in the special data register D8166 as follows.
The following actions should be taken.
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
Continues
3812
operation
3813
3814
3820
3830
PLC hardware error [M8061(D8061)]
⎯
0000
6101
Stops
operation
6102
884
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
1: Input (X), 0: Output (Y)
• 1st to 3rd digits: Device number
FX :10 to 177
3G
FX /FX :10 to 337
3U 3UC
• 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
Parallel link character error
Parallel link sum error
Parallel link format error
Inverter communication error
• FX /FX Series PLC
3U 3UC
Memory cassette write error
No error
Memory access error
Operation circuit error
38 Error Check Method and Error Code List
38.4 Error Code List and Action
Action
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 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.
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(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.