
B-63434EN/02 MAINTENANCE 1.HARDWARE
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1.2 LED Indications and Meanings
The FL-net board has four green LEDs (ROS, RES, LNK, and POK)
and one red LED (HER) for state indication, and two green LEDs
(COM and LIL) and one LED (COL) for communication status
indication. The locations and meanings of the LEDs are described
below. In the description below, the following marks are used to
represent the display states of each LED:
: Turned on : Turned off
✩: Blinking
: Don’t care
CD38N
4(POK)(GREEN)
3(LNK)(GREEN)
2(RES)(GREEN)
1(ROS)(GREEN)
B(HER)(RED)
(LIL)(GREEN)
(COL)(RED)
5(COM)(GREEN)
Note) The face plate is represented by dotted lines.
LED indication transition at power-on (ROS, RES, LNK, POK)
No. LED indication Ethernet board state
4321
POK LNK RES ROS
1 Power off
2 Initial state immediately after power-on
3 Completion of MPU initialization
4 Completion of downloading of firmware
5 Transfer of control to the OS
6 OS PHASE1
7 OS PHASE2
8 OS PHASE3
9 OS PHASE4
10
✩
Completion of activation
When the board is activated normally, the state of No. 10 is set.
This state continues until an error occurs.