Mitsubishi FX3G Series User Manual

14 Test Operation, Adjustment, Maintenance and Troubleshooting
14.6 Judgment by Error Codes and Representation of Error Codes
180
FX3G Series Programmable Controllers
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 special data registers D8061 - D8067 and
D8438. 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 devic
• 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.
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 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.
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
When memory casette is used, make sure that the memory
cassette is installed correctly.
6102 Operation circuit error
6103 I/O bus error (M8069 = ON)
Check for the correct connection of extension cables.
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.)
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
1 0 2 0
1: Input (X), 0: Output (Y)
Device number: 10 to 177
Example: When X020 is unconnected
BCD conversion value

Mitsubishi FX3G Series Specifications

General

Brand	Mitsubishi
Model	FX3G Series
Category	Controller
Language	English