Diagnosis with LEDs
25/55
5.3
EtherCAT Slave
For the
protocol, the communication LEDs
RUN
and
ERR
as well as the Ethernet LED
L/A IN
or
L/A OUT
can assume the states
described below. This description is valid from stack version V2.5 (V2).
LED
Color
State
Meaning
RUN
Duo LED red/green
(off)
Off
INIT:
The device is in INIT state.
(green)
Blinking
(2.5 Hz)
PRE-OPERATIONAL:
The device is in PRE-OPERATIONAL
state.
(green)
Single flash
SAFE-OPERATIONAL:
The device is in SAFE-OPERATIONAL
state.
(green)
On
OPERATIONAL:
The device is in the OPERATIONAL state.
ERR
Duo LED red/green
(off)
Off
No error:
The EtherCAT communication of the device is in
working condition.
(red)
Blinking
(2.5 Hz)
Invalid configuration:
General Configuration Error
Possible reason: State change commanded by master is
impossible due to register or object settings.
(red)
Single flash
Local error:
Slave device application has changed the EtherCAT
state autonomously.
Possible reason 1: A host watchdog timeout has occurred.
Possible reason 2: Synchronization Error, device enters Safe-
Operational automatically.
(red)
Double flash
Application watchdog timeout:
An application watchdog timeout
has occurred. Possible reason:
L/A IN
,
L/A OUT
LED green
(green)
On
Link:
The device is linked to the Ethernet, but does not send/
receive Ethernet frames.
(green)
Flickering (load
dependent)
Activity:
The device is linked to the Ethernet and sends/receives
Ethernet frames.
(off)
Off
The device has no link to the Ethernet.
LED yellow
(off)
Off
This LED is not used.
Table 18: LED states for the EtherCAT Slave protocol
LED state
Definition
Blinking
(2.5 Hz)
The indicator turns on and off with a frequency of 2.5 Hz: “on” for 200 ms,
followed by “off” for 200 ms.
Single flash
The indicator shows one short flash (200 ms) followed by a long “off“ phase
(1,000 ms).
Double flash
The indicator shows a sequence of two short flashes (each 200 ms),
separated by a short off phase (200 ms). The sequence is finished by a long
off phase (1,000 ms).
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 19: LED state definitions for the EtherCAT Slave protocol
CIFX M223090AE Real-Time Ethernet | Hardware description and installation
DOC190704UM02EN | Revision 2 | English | 2020-06 | Released | Public
© Hilscher 2020
