
B-63354EN/04 VI. MAINTENANCE 1.Series 16i
ii
i/18i
ii
i/21i
ii
i-A/PMi
ii
i MAINTENENCE INFORMATION
- -345
1.2.2 LED Indications
The 16i/18i/21i-A Stand-alone Ethernet board has the following LEDs:
Four green STATUS LEDs and one red ALARM LED for indicating
the status. Two green LEDs and one red LED for indicating the
communication status. The figure below shows the locations of these
LEDs. The table below explains the LED lighting states.
In the following explanations, the LED lighting states are expressed as
follows:
o: Off n: On ¶: Blinking à: Don't care
NOTE
The dashed lines indicate the faceplate.
LED lighting sequence at power on
No. LED indication Ethernet board state
1 STATUS oooo Power off
2 STATUS nnnn Initial state after power on
3 STATUS nnno MPU initialized.
4 STATUS nnoo Firmware downloaded.
5 STATUS nooo Control migration to OS
6 STATUS onnn OS PHASE1
7 STATUS onno OS PHASE2
8 STATUS onon OS PHASE3
9 STATUS onoo OS PHASE4
10 STATUS ooo¶ Startup completed.
The system enters No.10 status when the Ethernet board starts up
normally. This status is maintained until an error occurs.
CD38L
4(STASUS)(GREEN)
3(STATUS)(GREEN)
2(STATUS)(GREEN)
1(STATUS)(GREEN)
B(PAR)(RED)
6(RX)(GREEN)
5(TX)(GREEN)
(COL)(RED)