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LED Signals (Indicators)

Slave Controller – Technology I-87

15 LED Signals (Indicators)

EtherCAT slave controllers support different LEDs regarding link state and AL status. For details about

EtherCAT indicators refer to the ETG.1300 EtherCAT Indicator and Labeling Specification, available

from the download section of the EtherCAT Technology Group website (http://www.ethercat.org).

15.1 RUN LED

The AL status is displayed with the RUN LED (green). The RUN output of an ESC is controlled by the

AL status register (0x0130) and supports the following states, which are automatically translated into

blink codes:

Table 52: RUN LED state indication

RUN LED

Description

Off

The device is in state INIT

Blinking (slow)

The device is in state PRE-OPERATIONAL

Single Flash

The device is in state SAFE-OPERATIONAL

The device is in state OPERATIONAL

Flickering (fast)

The device is in state BOOTSTRAP or

loading the SII EEPROM*

* Some ESCs support RUN LED flickering while the SII EEPROM is loaded.

15.1.1 RUN LED override

Some ESCs support optional RUN LED outputs by overriding the state indication of the RUN LED.

The output can be set by master or local application. This can be used e.g. for locating a specific slave

by forcing the RUN LED to indicate a triple flash (Device Identification).

The RUN LED override is disabled automatically by a following ESM state change.

Table 53: Registers for RUN LED control

Name

Description

0x0130

AL Status register

After a state change, the RUN LED indicates the

current ESM state.

0x0138

RUN LED Override

Direct control of the RUN LED from ECAT

and/or PDI

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Beckhoff EtherCAT Technology Section I Bedienungsanleitung Seite 107