Installation and Commissioning

Troubleshooting ToolsNS - Network statusThe bicolour (green/red) LED indicates the status of the communication link. The LEDis controlled by software. The table below shows the different states of the NS LED.DescriptionOffDevice has no power or is not on-line.The device has not completed theDup_MAC_ID test yet.Flashing greenDevice is on-line, but has no connectionsin the established state.The device has passed the Dup_MAC_IDtest, is on-line, but has no establishedconnections to other nodes.For a group 2 only device it means thatthe device is not allocated to a master.For a UCMM capable device it meansthat the device has no establishedconnections.GreenThe device is on-line and has connectionin the established state.For a group 2 only device it means thatthe device is allocated to a master.For a UCMM capable device it meansthat the device has one or moreestablished connections.Flashing redOne or more I/O connections are in theTime-Out state.RedFailed communication device. The devicehas detected an error that has rendered itincapable of communicating on thenetwork.(Duplicate MAC_ID, or Bus-off).Remedy / Source of faultCheck status of MS LED.Check power to affected module.Check that other nodes in network areoperative.Check parameter to see if module hascorrect ID.If no light, check other LED modes.Check system messages.Check system messages and parameters.28 Product Manual