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Troubleshooting 7-3MN1942
7.2.2 CAN LEDs
TheCAN LED s display the overall condition of the C ANopen interface,
oncethe s tartup sequence has completed. The LED codes conform to
the CAN in Automation (CiA) DR303_3 indicator standard. The green
LEDindicates the s tate of the node’s internal CANopen ‘state machine’.
Thered LED i ndicates the state of the physical CANopen bus.
Green( run)
XOff: Node initializ ing or not powered.
1flash: Nodein STOPPED state.
3flashes : Softwareis being downloaded to the node.
Continuous flashing: Nodein PRE-OPERATIONAL state.
Flickering (very fast flashing): Auto-baudratedetec tion or LSS services in
progress; flickers alternately with red LED.
Continuously illuminated, not flashing: Nodein OPERATIONAL state.
Red(error)
XOff: No err ors or not powered.
1flash: Warning - too many error frames.
2flashes : Guardevent or heartbeat event has occurred.
3flashes : TheSYNC message has not been received within the t imeout period.
Flickering (very fast flashing): Auto-baudratedetec tion or LSS services in
progress; flickers alternately with green LED.
Continuously illuminated, not flashing: Thenode’s CAN controller is in the BU S
OFFs tate, preventing it from taking part in any CANopen communication.