Digital Inputs from Screw Feeder Not Showing Correctly

roubleshooting

1. Check Each Connection in the Circuit

Screw Feeder

• Use a multimeter to verify that 24 V is present on both output pins at the back of the feeder.

• To measure voltage:

  • Place one probe on either READY or STATUS pin.

  • Place the other probe on GND.

If you don’t measure 24 V, there may be an internal wiring issue inside the screw feeder.

Controller

• Check that the wires connecting the screw feeder to the robot controller are:

  • Properly screwed in

  • Connected to the correct input slots

• If any wires are loose or misaligned, reposition and secure them firmly to ensure proper signal transmission.

Robot Installation

• Open the I/O tab on the robot interface.

• Observe the Digital Inputs while:

  • Turning the screw feeder ON and OFF

  • Detecting a screw

Manual Test

• To manually test an input:

  • Use a small wire to connect a 24 V slot to the Digital Input (DI) slot you want to verify.

  • This simulates a signal and helps confirm if the robot is receiving it.

• If the input still does not respond, try a different DI slot on the controller.

URCap

• In your program, open the Pick_Screw node.

• Verify that the correct Digital Input is selected from the drop-down menu.

• If needed, test other available inputs to determine which one corresponds to the signal from the screw feeder.

PNP / NPN Configuration

• Ensure the system is set to the correct PNP or NPN mode, depending on your wiring.

In PNP mode (reverse logic for NPN):

• IO Screw Ready:
  → 24 V when a screw is ready
  → 0 V otherwise

• IO Status:
  → 24 V when the feeder is running properly
  → 0 V if there is a fault