FANUC Alarm PNT1-183 — Intermittent Connection Detected
FANUC PNT1-183 (“Intermittent Connection Detected”): A reading of 0 counts on the analog input (AIN[1,DISP]) causes the intermittent connection alarm. First check: Replace the electrical connector on the quick disconnect (QD) plate.
Updated 2026-09-17 · LogrobotLM reference
Description
A reading of 0 counts on the analog input (AIN[1,DISP]) causes the intermittent connection alarm. This is an indicator of potentiometer trouble during job playback, caused by an open/short circuit in cylinder position feedback. This alarm only occurs during a job or color change in auto mode. Regular, but not consistent, postings of this alarm indicate a poor electrical connection in the feedback circuit. The electrical connector at the quick disconnect (QD) plate, when damaged or worn, can cause this alarm. Induced noise in the feedback circuit from poor grounding leads to this temporary condition as well. Resistors inside the robot controller set the supply voltage to the linear potentiometer, and should be set at 10 Volts.
Remedy
Replace the electrical connector on the quick disconnect (QD) plate. Verify proper grounding of the feedback circuit. Replace the low voltage cable in the robot arm. Check the supply voltage to the linear potentiometer.
Related codes
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →