Mitsubishi Electric MELSEC FX3U - Error Code List and Action

940
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
38 Error Check Method and Error Code List
38.4 Error Code List and Action
38.4 Error Code List and Action
When a program error occurs in the PLC, the error code is stored in special data registers D8060 - D8067 and
D8438, D8449. The following actions should be followed for diagnostic errors.
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
FX
3G:10 to 177
FX
3U/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
• 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.
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
3812 Parallel link character error
3813 Parallel link sum error
3814 Parallel link format error
3820 Inverter communication error
PLC hardware error [M8061(D8061)]
0000 ⎯ No error
6101
Stops
operation
RAM error
6102 Operation circuit error
6103 I/O bus error (M8069 = ON)
Confirm for the correct connection of extension
cables.
6104 Powered extension unit 24 V failure (M8069 = ON)
6105 Watchdog timer error
Confirm 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 main
power turns ON.)
• When turning main power ON, I/O assignment to
CC-Link/LT (built into the FX
3UC-32MT-LT(-2)
PLC) is disabled.
6107 System configuration error
Check the number of connected special function
units/blocks. Some special function units/blocks
have a connection number limit.
1 0 2 0
1: Input (X), 0: Output (Y)
Device number
Example: When X020 is unconnected
BCD conversion value