48 Device Description
WAGO-I/O-SYSTEM 750
750-325 CC-Link Fieldbus Coupler
Manual
Version 2.0.1
4.3
Display Elements
The operating condition of the fieldbus coupler or the node is displayed with the
help of illuminated indicators in the form of light-emitting diodes (LEDs).
The LED information is routed to the top of the case by light guides. In some
cases, the LEDs are multi-colored (red, green or orange).
Figure 27: Display Elements
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For the diagnostics of the different domains fieldbus, node and supply voltage,
the LEDs can be divided into three groups:
Table 13: Display Elements Fieldbus Status
LED
Color
Meaning
L RUN
green
Data link is being executed.
L ERR
red
Communication error (master)
SD
green
Data is being transmitted.
RD
green
Data is being received.
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Table 14: Display Elements Node Status
LED
Color
Meaning
I/O
green
Node operation.
green blinking Waiting for initial data.
red blinking
Signals via a blink code faults encountered.
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Table 15: Display Elements Supply Voltage
LED
Color
Meaning
A
green
indicates the status of the operating voltage – system
B
green
indicates the status of the operating voltage – power jumper contacts
More information about the LED Signaling
Read the detailed description for the evaluation of the displayed LED state in the
section “Diagnostics” > … > “LED Signaling”.