Troubleshooting - Mitsubishi Electric MELSEC iQ-R Series User Manual

Section 8 TROUBLESHOOTING
8.2

Troubleshooting

8.2.1 When "RUN" LED is turned off
Check item
Is power source is supplied?
Is capacity of the power source
module sufficient?
Is the watchdog time an error?
Is the module properly attached to
the base unit?
Is the slot type set to "empty" in the
I/O assignment setting of the PC
parameter?
8.2.2 When "ERR" LED is turned on or flashing
(1) If it is ON
Check item
Did any error occur?
(2) If it is flashing
Check item
Did any error occur?
Table 8.2.1-1 When "RUN" LED is turned off
Check that supply voltage of the power source is within
the rating.
Calculate the consumption current of CPU module, I/O
module, and intelligent function module attached to the
base unit, and check that the power capacity is
sufficient.
Reset CPU module, and check whether it is turned on.
If RUN LED is not turned on even after doing the
above, the module may have a failure. Consult with
a nearest sales agent or our company branch for the
symptom of the failure.
Check the module attachment status.
Set the slot type to "Intelligent".
Table 8.2.2-1 When "ERR" LED is turned on
Check latest error code (Un\G3000), and take a
corrective action as described in "8.1 List of error
codes". After that, reset CPU module, and check
whether it is turned on.
If "ERR." LED is turned on even after doing the above,
the module may have a failure. Consult with a nearest
sales agent or our company branch for the symptom of
the failure.
Table 8.2.2-2 When "ERR" LED is flashing
The set value may be out of range. Check that the
operating condition settings and the integrated value
are correct.
Correct configuration or changing the request for error
clear (YF*) to ON will recover the error. When the error
is cleared using the error clear request (YF*), the
operation continues with the previous setting.
* In the case where the initial I/O number of this module
is 0.
137
Action
Action
Action
RE81WH
Reference
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6.2
6.4.1
Reference
8.1
Reference
4.2.2
Section 5
6.4.2