Mitsubishi Electric MELSEC Q Series Reference Manual page 162

(3) Executing the self-loopback test
Powering OFF and ON or resetting the CPU
module starts the test.
During test execution
The MODE LED flashes, and each of the
turns ON and OFF in order (1
Note that, upon detection of an error, the test is
immediately terminated (error completion).
S 1 1
T.
N
2
O.
4
8
X100 10
The D LINK LED turns ON.
When completed normally
The MODE LED flashes, and 1, 2, 4 and 8
LEDs turn OFF.
S 1 1
T.
N
2
O.
4
8
X100 10
The MODE LED flashes, and the ERR.LED and
any one of 1, 2, 4 and 8
S 1 1
T.
N
2
O.
4
8
X100 10
160
Start
*1
10 LEDs
2 4 8 1 ).
1 RUN PRM
2 MODE D LINK
4 SD RD
8 ERR.
1
Test completion
10
1
RUN PRM
2 MODE D LINK
4 SD RD
8 ERR.
1
When failed
10 LEDs turn ON.
1 RUN PRM
2 MODE D LINK
4 SD RD
8 ERR.
1
When failed
Test result?
When completed
normally
Replace the optical fiber cable and execute the test again.
*2 If it fails again, the CC-Link IE controller network module hardware may
End
be faulty. Please consult your local Mitsubishi representative.