
2. 15i SERIES HARDWARE
B–63785EN/01
134
The Fast data server for 15i–B incorporates the following LEDs: Four
green STATUS LEDs and three red ALARM LEDs 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:
f:Off F:On l: Blinking Z:Don’t care
For the communication status
For the status
For alarm
Unused
STATUS
ALARM
1 2 3 4
L4
L3
L7
L8
L1
L2
L5
L6
COL
No.
LED indication
(L1 through L4)
Data server board state
1 f f
f f
Power off
2 F F
F F
Initial state after power on
3 f F
F F
MPU initialized.
4 f F
f F
Firmware downloaded.
5 f F
f f
Control migration to OS
6 F f
F F
OS PHASE1
7 f f
F F
OS PHASE2
8 F f
f F
OS PHASE3
9 f f
f F
OS PHASE4
10 l f
f f
Startup completed.
The system enters the No.10 status when the Fast Ethernet board starts
normally. This status is maintained until an error occurs.
D LED display
D LED lighting sequence at
power on