Here are the introductions regarding the LED status. Hope it will help. Thanks.
LED Indicator Each supported DeviceNet product has bi-color (green/red) LED indicators to show status. The LED indicator assignments are as follows:
LED 1—The module status LED for Port 1.
LED 2—The network status LED for Port 1.
The module status LED definitions are as follows:
LEDDescription Off No application is using the DeviceNet hardware port. The DeviceNet port is disconnected from the DeviceNet network in this state. Green The DeviceNet hardware port is operating in a normal condition. RedThe DeviceNet hardware port has experienced an unrecoverable fault. Stop all of the applications using this port or reboot the related controller.
The network status LED definitions are as follows:
LED Description Off No application uses the DeviceNet hardware port. Flashing Green The DeviceNet hardware port is used but has no established connection with other DeviceNet devices. Green The DeviceNet hardware port has at least one established connection with another DeviceNet device. Flashing Red One or more I/O connections have timed out. RedThe DeviceNet hardware port has failed to communicate with the DeviceNet network. The reason can be that the bus is not powered, or a duplicate DeviceNet address (MAC ID) was detected.