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3.2.9 LED display
The coupler possesses several LEDs for on site display of the controller oper-
ating status or the complete node.
LonWorks
LonWorks
Fig. 3-14: Display elements 750-819
A differentiation between two LED groups is made.
The first group = fieldbus contains the solid color LEDs having the designa-
tion SERVICE (green), STATUS (red) und ICOM (green) indicating the oper-
ating status of the communication via LON.
The second group = internal bus consists of the three-color I/O LED
(red/green/orange). This LED is used to display the status of the internal bus
and software exception handling, i. e. the status of the fieldbus node.
The three-color USR-LED can be accessed by a user program in the pro-
grammable fieldbus controller.
LEDs located on the right-hand side in the coupler power supply section show
the status of the supply voltage.
Modular I/O System
®
L
W
ON
ORKS
01 02
A
A
C
C
A
B
B
SERVICE
SERVICE
D
24V 0V
STATUS
STATUS
ICOM
ICOM
I/O
I/O
+ +
USR
Fieldbus coupler/controller
Review
• 85
g081902x
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