FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
282
14 Test Operation, Adjustment, Maintenance and Troubleshooting
14.6 Judgment by Error Codes and Representation of Error Codes
PLC hardware error [M8061(D8061)]
6103
Stops
operation
I/O bus error (M8069 = ON)
Verify that extension cables are correctly connected.
6104 Powered extension unit 24 V failure (M8069 = ON)
6105 Watchdog timer error
Check user program.
The scan time exceeds the value stored in D8000.
6106 I/O table creation error (CPU error)
When turning the power ON to the main unit, a
24V power failure occurs in a powered extension
unit. (The error occurs if the 24V power is not
supplied for 10 seconds or more after the main
power is turned ON.)
6107 System configuration error
Check the number of the connected special function
units/blocks. For certain special function units/
blocks, the connectable number is limited.
PLC/PP communication error (D8062)
0000 ⎯ No error
6201
Continues
operation
Parity, overrun or framing error
Check the cable connection between the
programming panel (PP) / programming device and
the PLC. This error may occur when a cable is
disconnected and reconnected during PLC
monitoring.
6202 Communication character error
6203 Communication data sum check error
6204 Data format error
6205 Command error
6230 Memory cassette write error
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.
Serial communication error 1 [M8063 (D8063)]
0000 ⎯ No error
6301
Continues
operation
Parity, overrun or framing error
• Inverter communication, computer link and
programming:
Ensure that 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.
6302 Communication character error
6303 Communication data sum check error
6304 Communication data format error
6305 Command error
6306 Communication time-out detected
6307 Modem initialization error
6308 N:N network parameter error
6309 N:N Network setting error
6312 Parallel link character error
6313 Parallel link sum error
6314 Parallel link format error
6320 Inverter communication error
6330 Memory cassette write error
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.
6340 Special adapter connection error Check connection of the special adapter.
Error
code
PLC operation at
error occurrence
Contents of error Action
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