# Link/Activity LED's (5/6)

Navigation: Valve Firmware > Interface > EtherCAT > LEDs > # Link/Activity LED's (5/6) |

These LED’s indicate the EtherCAT link status and activity.

LED State | Indication | Description
Off | No link | Link not sensed (or no power)
Green | Link sensed, no activity | Link sensed, no traffic detected
Green flickering | Link sensed, no activity detected | Link sensed, traffic detected