Installation and Commissioning

Fault tracing guide1.6 Distributed I/OI/O units communicate with the I/O computer, located on the robot computer board, viathe CAN bus. To activate the I/O units they must be defined in the system parameters.The I/O channels can be read and activated from the I/O menu on the teach pendant.In the event of an error in the I/O communication to and from the robot, check as follows:1. Is I/O communication programmed in the current program?2. On the unit in question, the MS (Module status) and NS (Network status) LEDs mustbe lit with a fixed green colour. See the table below regarding other conditions:MS LED is: To indicate ActionOff No power Check 24 V CANGreenNormal conditionFlashing green Software configuration missing,Configure devicestandby stateFlashing red/green Device self testing Wait for test to becompletedFlashing red Minor fault (recoverable) Restart deviceRed Unrecoverable fault Replace deviceNS LED is: To indicate ActionOffNot powered/not on-lineFlashing green On-line, not connected Wait for connectionGreenRedOn-line, connections establishedCritical link failure, incapableof communicating (duplicateMAC ID, or bus-off)Change MAC ID and/or check CAN connection/cables3. Check that the current I/O signal has the desired status using the I/O menu on thetech pendant display.4. Check the I/O unit’s LED for the current input or output. If the output LED is not lit,check that the 24 V I/O power supply is OK.5. Check on all connectors and cabling from the I/O unit to the process connection.8 Product Manual