Diagnosis with LEDs
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LED
Color
State
Meaning
ACT
LED yellow
(yellow)
Flickering (load
dependent)
The device sends/receives Ethernet frames.
(off)
Off
The device does not send/receive Ethernet frames.
Table 20: LED states for the EtherNet/IP Adapter protocol
LED state
Definition
Flashing
(1 Hz)
The indicator turns on and off with a frequency of 1 Hz: “on” for 500 ms,
followed by “off” for 500 ms.
Flashing
green/red/
green
The MS LED indicator turns on green on for 250 ms, then red on for 250 ms,
then green on (until the test is completed).
Flashing
green/red/off
The NS LED indicator turns on green on for 250 ms, then red on for 250 ms,
then off (until the test is completed).
Flickering
(load
dependent)
The indicator turns on and off with a frequency of approximately 10 Hz to
indicate high Ethernet activity: on for approximately 50 ms, followed by off
for 50 ms. The indicator turns on and off in irregular intervals to indicate low
Ethernet activity
Table 21: LED state definitions for the EtherNet/IP Adapter protocol
CIFX M223090AE Real-Time Ethernet | Hardware description and installation
DOC190704UM02EN | Revision 2 | English | 2020-06 | Released | Public
© Hilscher 2020
