
1.Series 16i
ii
i/18i
ii
i/21i
ii
i-A/PMi
ii
i MAINTENENCE INFORMATION VI. MAINTENANCE B-63354EN/04
- -348
1.3.2 Description of LED Indication
The 16i/18i/21i-A Stand-alone type data server board incorporates the
following LEDs: Four green STATUS LEDs and three red ALARM
LEDs (for both the data server board and the RISC option board) for
indicating the status. Four 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:
¡: Off l: On ¶: Blinking à: Don't care
LED lighting sequence at power on
No.
LED indication
(L1 through L4)
Data server board state
1
¡¡
¡¡
Power off
2
ll
ll
Initial state after power on
3
¡l
ll
MPU initialized.
4
¡l
¡l
Firmware downloaded.
5
¡l
¡¡
Control migration to OS
6
l¡
ll
OS PHASE1
7
¡¡
ll
OS PHASE2
8
l¡
¡l
OS PHASE3
9
¡¡
¡l
OS PHASE4
10
¶¡
¡¡
Startup completed.
The system enters the No.10 status when the Ethernet board starts
normally. This status is maintained until an error occurs.
STATUS
12 34
L1
For the status of the data serve
board
For the communication status
L2
L4
L3
L5
L6
L7
L8
ALARM
COL
For the status of the RISC option
board
For the RISC option board and the
data server board