Troubleshooting12-212.1 Confirming Errors Using Self-diagnostic Function12.1.1 Checking the LED Display of UnitFP7 Multi I/O Unit has a self-diagnostic function which identifies errors and stops operation ifnecessary. The types of the self-diagnostic function are alarms, errors and warnings. Whenan error occurs, check the ERR.LED state and error type, and monitor the unit memory inwhich the code is stored.ERR.LEDstateType State Operation ofCPU unit SolutionLights Alarm(H type only) Alarm occurs. Stops the operation. Refer to “12.2.1 ERR LED TurnsON on the Unit“.LightsError 1Unit error occurs. Stops the operation.Monitor UM00064 and check theerror code. For details of errorcodes, refer to "12.2.1 ERR LEDTurns ON on the Unit".Error 2Monitor UM00066 and check theerror code. For details of errorcodes, refer to "12.2.1 ERR LEDTurns ON on the Unit".Flashes Warning Warning occurs. Continues theoperation.Monitor UM00065 and check thewarning code. For details ofwarning codes, refer to "12.2.3ERR LED is Flashing on the Unit".
