LED signals

Overview

SOMANET Circulo has several LEDs that show the drive’s state or indicate errors.

Legend

Symbol	Explanation
	Off
	Constantly luminous
	Single flashes (1 pulse per second)
	Slow blinking (3 pulses per second)
	Fast blinking (10 pulses per second)
	Two colored behavior: One part of the LED is constantly luminous, the other is blinking slowly (3 pulses per second)
	Two colored behavior: One part of the LED is constantly luminous, the other is blinking fast (10 pulses per second)

Status LED

The tri-color LED is used by the firmware to indicate internal status and errors. It provides an overview of the firmware state at a glance to quickly see whether a drive is operating nominally.

Firmware

		CiA 402 State
		Not Ready to Switch On	Switch on Disabled	Ready to Switch On	Switched On	Operation Enabled	Quick Stop	Fault and Fault Reaction
EtherCAT State	BOOT
	INIT
	PREOP
	SAFEOP
	OP

Bootloader

Signals that are shown when the Bootloader is active:

Bootloader State	No Fault (firmware exists)	Fault (no firmware exists)
Idle
Operation in progress

Note

If your servo drive is running Bootloader v1.0 you may find the LED fading in rainbow colors indicating that the bootloader is active.

EtherCAT LED

Signals on the EtherCAT LED are required for EtherCAT conformity.

LED 1: Port 1 (In) ACT	LED 2: Port 2 (Out) ACT	LED 3: RUN

RUN is constantly showing a green light if there is a cable connected to either OUT or IN.

ACT is blinking when there are transmissions on either OUT or IN.

If none of the LEDs are active, check if the EtherCAT cables are connected properly.