Installation and Commissioning

Troubleshooting ToolsModule- and network status LEDs at power-upThe system performs a test of the MS and NS LEDs during start-up. The purpose of this testis to check that all LEDs are functioning properly. The test runs as follows:- - NS LED is switched Off.- - MS LED is switched On green for approx. 0.25 seconds.- - MS LED is switched On red for approx. 0.25 seconds.- - MS LED is switched On green.- - NS LED is switched On green for approx. 0.25 seconds.- - NS LED is switched On red for approx. 0.25 seconds.- - NS LED is switched On red.If a device has other LEDs, each LED is tested in sequence.CAN Tx - CAN network transmitDescriptionGreen LED. Physically connected to theCan Tx line. Flashes when the CPU isreceiving data on the CAN bus.Remedy / Source of faultIf no light when transmission is expected,check error messages.Check system boards in rack.CAN Rx - CAN network receiveDescriptionGreen LED. Physically connected to theCan Rx line. Flashes when the CPU istransmitting data on the Can bus.Remedy / Source of faultIf no light, check network andconnections.Product Manual 29