2. HARDWARE
B–63835EN/03
160
There are no LEDs on a printed circuit board on which only the built–in
I/O function is implemented.
The LEDs on this printed circuit board indicate the state and error related
to the data server function.
D LED lighting sequence at power on
j: Off J: On l: Blink
NO.
STATUS 1234 Status
1 STATUS jjjj Power off
2 STATUS JJJJ Initial state after power on
3 STATUS JJJj MPU initialized.
4 STATUS JJjj Firmware downloaded.
5 STATUS Jjjj Control migration to OS
6 STATUS jJJJ OS PHASE 1
7 STATUS jJJj OS PHASE 2
8 STATUS jJjJ OS PHASE 3
9 STATUS jJjj OS PHASE 4
10 STATUS jjjl Startup completed.
When the board is successfully started, the LEDs light as shown in No.
10. This state is held until an error occurs.
D STATUS LED indications if an error occurs
If an error occurs, the LEDs repeatedly flash ”LONG” then ”SHORT.”
(For ”LONG,” the LED lights for a long time. For ”SHORT,” the LED
lights for a short time.)
STATUS
No.
LONG
1 2 3 4
SHORT
1 2 3 4
Board state
1 JJjj jjJJ
SDRAM paruty alarm
2 JjJj jjjj
Failure caused by
this board
General invalid instruction
3 JjJj jjjJ
Invalid slot instruction
4 JJjj jjjJ
Failure caused by
another board
NMI of another module
D ALARM LED indications if an error occurs
NO. ALARM 123 Fast Ethernet board state
1 ALARM Jjj Parity error occurred in main memory.
D LED indications related to communication status
NO. ALARM 123 Communication state
1 ALARM jjJ Lights when a data collision occurs.
This LED lights frequently when Ethernet communication
traffic (amount of communication) is heavy or the ambient
noise level is high.
D LED display