Ethercat Basics - Leuze electronic MSI 400 Series Manual

LED
RUN
ECAT-OUT
LINK
TX/RX
Tab. 11.2: Information about the light behavior of the EtherCAT status LEDs
LED states
On
Off
Blink
Single flash
Double flash
11.2

EtherCAT basics

General information
Field buses have been established in automation engineering for many years. Since on the one hand there
is demand for ever higher speeds, but on the other hand the technical limits have already been reached
with this technology, new solutions must be sought.
The Ethernet known from the office world, with its available-everywhere 100Mbit/s, is very fast. The type of
cabling used there and the rules governing access rights mean that this Ethernet is not real-time capable.
This effect has been rectified with EtherCAT.
EtherCAT
For EtherCAT: EtherCAT is a registered trademark and patented technology, licensed by Beckhoff Automa-
tion GmbH, Germany.
EtherCAT stands for Ethernet for Controller and Automation Technology. It was originally developed by
Beckhoff Automation GmbH and is now supported and further developed by the EtherCAT Technology
Group (ETG). The ETG is the world's largest international users and manufacturers association for indus-
trial Ethernet with around 1450 member firms (as at October 2010).
EtherCAT is an open Ethernet-based fieldbus system that is standardized in the IEC. As an open fieldbus
system, EtherCAT satisfies the user profile for the area of industrial real-time systems.
Leuze electronic
Meaning
Off
Off
"INIT": The device is in the INIT state.
On
Green
"OPERATIONAL"
Blink
Green
"PRE-OPERATIONAL"
Single flash
Green
"SAFE-OPERATIONAL"
No EtherCAT device connected, no connection
Off
On
Green
EtherCAT device is connected
Blink
Green
The device sends/receives Ethernet frames
This LED is not used
Off
Description
The indicator is constantly on.
The indicator does not come on.
The indicator is switched on or off in phases at a frequency of 2.5
Hz.
The indicator shows one short flash (200 ms) followed by a longer
off phase (1000 ms).
The indicator shows a sequence of two short flashes (200 ms
each) interrupted by a short off phase (200 ms).
The sequence is finished by a long off phase (1000 ms).
MSI 400
EtherCAT Gateway
151