
2.Series 16i/18i/21i, Power Mate i MAINTENENCE INFORMATION VI. MAINTENANCE B-63644EN/02
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2.2.2 Description of LED Indication
The Fast data server incorporates the following LEDs: Four green
STATUS LEDs and three red ALARM LEDs (for both the Fast data
server 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 Fast Ethernet board starts
normally. This status is maintained until an error occurs.
STATUS
12 34
L1
For the status
For the communication status
L2
L4
L3
L5
L6
L7
L8
ALARM
COL
Unused
For the alarm