Mitsubishi Electronics Mitsubishi Digital Electronics Video Gaming Accessories FX3G ユーザーズマニュアル
873
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
38 Error Check Method and Error Code List
38.1 States and Colors of LEDs PLC Operation Status
31
FN
C
275
-F
-F
N
C
27
9
Da
ta
Trans
fe
fe
r 3
32
FN
C
280-
FN
FN
C
289
H
igh Speed
Pr
ocessing 2
33
FN
C
290-
FN
FN
C
299
E
xtension Fi
le
R
egister
34
FN
C
300-
FN
FN
C
30
5
FX
3U
-C
F-A
D
P
35
SFC•
STL
Pr
ogr
am
m
am
m
ing
36
In
ter
rupt
Funct
ion
37
S
pecial
D
evice
38
Er
ro
r C
ode
A
Ve
rs
ion U
p
In
fo
rm
atio
n
B
Executi
on
T
im
es
38.1.3 BATT (BAT) LED [lit or unlit] [FX
3U
/FX
3UC
]
38.1.4 ALM LED [lit or unlit] [FX
3G
]
This LED is valid when the optional battery is installed and the battery mode is selected using a parameter.
38.1.5 ERROR (ERR) LED [lit, flickering or unlit] [FX
3G
/FX
3U
/FX
3UC
]
LED status
PLC status
Action
Lit
The battery voltage is low.
Replace the battery as soon as possible.
(Refer to FX
(Refer to FX
3U
/FX
3UC
Hardware edition.)
Unlit
The battery voltage exceeds the value set in
D8006.
D8006.
The battery is normal.
LED status
PLC status
Action
Lit
The battery voltage is low.
Replace the battery as soon as possible.
(Refer to FX
(Refer to FX
3G
Hardware edition.)
Unlit
The battery voltage exceeds the value set in
D8006.
D8006.
The battery is normal.
LED status
PLC status
Action
Lit
A watchdog timer error has occurred, or
the hardware of the PLC may be
damaged.
the hardware of the PLC may be
damaged.
1) Change the PLC mode to STOP, and turn ON the PLC power
again.
When the ERROR (ERR) LED is off, a watchdog timer error
occurred. Take one of the following actions:
When the ERROR (ERR) LED is off, a watchdog timer error
occurred. Take one of the following actions:
-
Review the program, and make sure that the maximum
value (D8012) of the scan time is not larger than the set
value (D8000) of the watchdog timer.
value (D8012) of the scan time is not larger than the set
value (D8000) of the watchdog timer.
-
Make sure that an input used for input interrupt or pulse
catch does not abnormally turn ON and OFF several times
in one scan time.
catch does not abnormally turn ON and OFF several times
in one scan time.
-
Make sure that the frequency of the pulse (duty: 50%) input
to a high speed counter is within the specifications range.
to a high speed counter is within the specifications range.
-
Adding WDT instruction
Use two or more WDT instructions in a program so that the
watchdog timer is reset several times in one scan time.
Use two or more WDT instructions in a program so that the
watchdog timer is reset several times in one scan time.
-
Change the set value of the watchdog timer
Change the set value (D8000) of the watchdog timer in a
program so that it is larger than the maximum value (D8012)
of the scan time.
Change the set value (D8000) of the watchdog timer in a
program so that it is larger than the maximum value (D8012)
of the scan time.
2) Remove the PLC, and connect another power supply to the
PLC.
If the ERROR (ERR) LED is off, the cause of the error may be
noise. Examine the following action:
If the ERROR (ERR) LED is off, the cause of the error may be
noise. Examine the following action:
-
Check the wiring for grounding, and then review the wiring
route and installation location.
route and installation location.
-
Add a noise filter in the power line.
3) If the ERROR (ERR) LED is not off even after the step 1) or 2),
consult a Mitsubishi Electric Distributor.
Flickering
Either of the following errors occur in PLC:
•
•
Parameter error
•
Syntax error
•
Circuit error
Execute PLC diagnostics and program check by programming tool.
For instructions, refer to Section 38.4.
For instructions, refer to Section 38.4.
Unlit
Error which stops PLC has not occurred.
If PLC operation is a failure, execute the PLC diagnostics or
program check by programming tool.
An I/O configuration error, serial communication error, or operation
error may occur.
program check by programming tool.
An I/O configuration error, serial communication error, or operation
error may occur.