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Diagnostics and troubleshooting
Tab. 8.5:
ERL LED displays - Causes and measures
LED
Color
ERL
Orange
Red
Tab. 8.6:
LINK and LINK/ACT LED displays – Causes and measures
LED
Color
LINK
---
LINK/
ACT
Leuze electronic GmbH + Co. KG
State
possible causes
Continuous
Link error on second device:
light
• Missing link on Ethernet cable
connection of the second device.
• SIGNAL QUALITY indicator on
second device without green and
orange LEDs.
Continuous
Link error on first device:
light
• Missing link on Ethernet cable
connection of the first device.
• SIGNAL QUALITY indicator on
first device without green and or-
ange LEDs.
State
possible causes
OFF
No cable-connected link to the con-
nected device.
DDLS 538 ...
Measures
Check EtherCAT cable connection
on second device.
Check cause for the reduced SIG-
NAL QUALITY:
• Device alignment
• Clean optical window.
• Eliminate the possibility of en-
vironmental influences such as
snow, rain, fog.
• Laser diode: at end of life ex-
pectancy
Check LSR LED.
Check EtherCAT cable connection
on first device.
Check cause for the reduced SIG-
NAL QUALITY:
• Device alignment.
• Clean optical window.
• Eliminate the possibility of en-
vironmental influences such as
snow, rain, fog.
• Laser diode: at end of life ex-
pectancy
Check LSR LED.
Measures
Check EtherCAT cable
connection.
63
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