Signalling LEDs

Nix Servo Drive provides information through 5 signalling LEDs:

  • Supply and operation: 3 LEDs next to the RS485 connector. 
  • CANopen communication: 2 LEDs next to the CAN connector.

Nix with EtherCAT includes 3 more LEDs for the EtherCAT fieldbus status.

NixLEDsSignalling

Power and operation signalling LEDs

Three LEDs situated next to the RS485 connector indicate the supply and operation status. Next table shows the meaning of each LED:

LED

Colour

Meaning

POWER

Green

LED is on when internal power supply is working.

FAULT

Red

LED is on when a fault or error has occurred.

SHUNT
Orange
LED is turned on with the shunt braking resistor is activated, indicating that maximum user voltage has been exceeded and power is being dissipated.

CAN signalling LEDs

Two LEDs besides the CAN connector provide information about the CANopen communication status, according to CiA 303-3 recommendations. The red LED is ERROR LED and green one is RUN LED

ERROR LED indicates the status of the CAN physical layer and errors due to missed CAN messages (sync, guard or heartbeat). Next table the meaning of the ERROR LED states:

ERROR LED State*

 Concept

Description

Off

No error

Device is in working condition.

Single flash

Warning limit reached

At least one of the error counters of the CAN controller has reached or exceeded the warning level (too many error frames).

Double flash

Error control event

A guard event (NMT-slave or NMT-master) or a heartbeat event (heartbeat consumer) has occurred.

Triple flash

Sync error

The sync message has not been received within the configured communication cycle period time out.

On

Bus off

The CAN controller is bus off.

RUN LED indicates the status of the CANopen network state machine. Next table shows the meaning of the RUN LED states:

RUN LED State*

 Concept

Description

Off

Off

The device is switched off

Blinking

Pre-operational

The device is in state PREOPERATIONAL

Single flash

Stopped

The device is in state STOPPED

On

Operational

The device is in state OPERATIONAL

*See a detailed description of the states in the next table:

* Possible LED States

Description

ON

The LED is always on

OFF

The LED is always off

Single flash

One short flash (~200 ms) followed by a long off phase (~1000 ms)

Double flash

Sequence of 2 short flashes (~200 ms), separated by an off phase (~200 ms). The sequence is finished by a long off phase (~1000 ms)

Triple flash

Sequence of 3 short flashes (~200 ms), separated by an off phase (~200 ms). The sequence is finished by a long off phase (~1000 ms)

Blinking

On and off with a frequency of ~2.5 Hz: ON for ~200 ms followed by off for ~200 ms.

Note that the specified timings can vary in up to ±20%.

EtherCAT signalling LEDs

The Nix Servo Drive with EtherCAT fieldbus includes 3 more LEDs to indicate communication status according to EtherCAT specification.

NixEtherCATleds

The EtherCAT bicolor green/red LED indicates the EtherCAT state machine status. The green LED is the RUN LED, and the red LED is the ERROR LED. Next table shows their states meaning:

RUN LED State

EtherCAT slave status

 

ERROR LED State

EtherCAT slave status

OffINITOffNo error
BlinkingPRE-OPERATIONALBlinkingInvalid configuration
Single FlashSAFE-OPERATIONALSingle flashLocal error
OnOPERATIONALDouble flashWatchdog timeout
  OnApplication controller failure

For high severity errors inside the Nix Servo Drive, an special LED state has been developed:

StatusSignallingRUN LED stateERROR LED state
Internal errorInterleaved blinkBlinking (Initial status: OFF)Blinking (Initial status: ON)

The frequency of the blinking is different than the used for communication and is product dependent.

The other two LEDs are situated in the EtherCAT connector. Each connector has two LEDs, but only the yellow LED is used. The LINK LED indicates the state of the EtherCAT physical link activity:

LINK LED

Slave State

OffPort closed
FlickeringPort opened (activity on port)
OnPort opened (no activity on port)