2.1 Names and Functions of Parts2-32.1.2 Operation monitor LEDsLED Description Color LED ON LED OFF LEDFlashing1 － Power supply of the unit Blue ON OFF ―2 X0-XF Input signal monitor (Note 1)(Note 2) Green Displays the status of the input signal.3 Y0-YF Output signal monitor (Note 1) Green Displays the status of the output signal.4 YN Output polarity display(Note 3) (Note 4) Green Turns on when the output that is set to "Sink output"or "Push-pull output (negative logic)" exists.5 YP Output polarity display(Note 3) (Note 4) Green Turns on when the output that is set to "Sourceoutput" or "Push-pull output (positive logic)" exists.6 ERR Alarm/Error/Warningoccurrence display RedAt the time ofalarm/erroroccurrenceIn normaloperationAt the time ofwarningoccurrence(Note 1): The LEDs for the input and output both look as if they are continuously lit because the flashing speed is fastwhen the frequencies of signals are high.(Note 2): The LED of each input signal indicates the status after an input time constant processing.(Note 3): The output polarity display is switched by the output polority setting using the tool software or a program.(Note 4): When the output polarity is not set by the software or program, the both YN and YP turns off. Also, when thesettings of sink, source, push-pull (negative logic) or push-pull (positive logic) are mixed, the YN and YP turn onaccording to the polarity, and a warning occurs simultaneously.2.1.3 Mode setting switchesNo. Description1 ON: Use the interrupt function, OFF: Not use the interrupt function234Not available. They should be always OFF.(Note): At the factory setting, the mode setting switch number 1 is set to "OFF" (the setting not to use the interruptfunction).
