8
TROUBLESHOOTING
8.1 Error Processing and Recovery Methods
8.1.2 When the RUN LED turns OFF
8
- 4
1
OVE
R
VI
EW
2
SYS
TEM
CONFIGURA
T
ION
3
SP
ECIFI
C
A
T
IO
N
S
4
PRO
C
EDURES AND
SETT
ING
S
BEFO
RE
O
PERA
T
IO
N
5
FUNCTIONS
6
UTIL
IT
Y P
A
C
K
A
G
E
(G
X Conf
igu
rat
or-CT)
7
PROGRA
MMING
8
T
R
OUB
L
ES
HO
O
T
ING
8.1.2
When the RUN LED turns OFF
8.1.3
When the RUN LED and ERR. LED turn ON
Table 8.4 When the RUN LED turns OFF
Check item
Action
Reference
Is power supplied?
Check if the service voltage of the power supply
module is within the rated range.
-
Is the capacity of the power supply module
sufficient?
Calculate the consumption current of the modules
mounted to the base unit such as CPU module, I/O
module, and intelligent function module, and check
that the current capacity is sufficient.
-
No watchdog timer error?
Reset the programmable controller CPU and check
that the RUN LED turns ON. If the RUN LED
remains OFF even doing so, the QD63P6 is a
failure. Please consult your local Mitsubishi
representative, explaining a detailed description of
the problem.
Are the modules correctly mounted to the base
unit?
Check the module mounting status.
Table 8.5 When the RUN LED and ERR. LED turn ON
Check item
Action
Reference
No error?
Check the error code of the used channel
(Un\G20) and take measures described in Error
Codes List.