Error Codes In Plc - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Computer Link
8.5.2

Error codes in PLC

When an error is included in a message sent from the computer to a PLC, an error occurs in the PLC.
When such an error occurs, the serial communication error flag turns ON.
When PLCs other then FX
FX , FX or FX
3GC 3U
an FX , FX , FX
3G 3GC
When a serial communication error occurs, the error code is stored in D8063 if M8063 turns ON, or stored in
D8438 if M8438 turns ON.
The error code list is shown below:
Error
Device
code
6301
6305
D8063
(ch1)
6306
3801
3805
D8438
(ch2)
3806
Serial communication errors and serial communication error code are not cleared even when communication
is restored.
Serial communication errors are cleared in FX
turned off and on.
Serial communication errors are cleared in other PLCs when the mode is switched from STOP to RUN.
, FX , FX and FX
3G 3GC 3U
PLC, the special auxiliary relay M8063 turns ON as an error flag. When ch2 is used in
3UC
or FX PLC, the special auxiliary relay M8438 turns ON as an error flag.
3U 3UC
Error item
Parity, overrun or
The transfer data is abnormal.
framing error
When the station number was FF,
Command error any command other than "GW"
was received.
The received message was
insufficient. Because normal
Monitoring timeout message was not received within
the time-out time setting, the
transfer sequence was initialized.
Parity, overrun or
The transfer data is abnormal.
framing error
When the station number was FF,
Command error any command other than "GW"
was received.
The received message was
insufficient. Because normal
Monitoring timeout message was not received within
the time-out time setting the
transfer sequence was initialized.
PLCs are used or when ch1 is used in an FX
3UC
Contents of error
, FX , FX , FX and FX
3S 3G 3GC 3U
8 Troubleshooting
8.5 Checking Error Codes
Action
Check the transfer specifications
set using parameters, and
execute communication again.
Check the specified command,
modify it if necessary, and then
execute communication again.
The message is insufficient.
Check the transfer program in the
computer, modify it if necessary,
and then execute communication
again.
Check the transfer specifications
set using parameters, and
execute communication again.
Check the specified command,
modify it if necessary, and then
execute communication again.
The message is insufficient.
Check the transfer program in the
computer, modify it if necessary,
and then execute communication
again.
PLCs when the power is
3UC
D-89
A
,
3G
B
C
D
E
F
G
H
I
Apx.A