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FANUC Alarm SYST-066 — PAUSE Teach Pendant communication error

Error
Hardware
teach pendant
Controllers
R-J3iB / R-30iA
FANUC class
PAUSE.G
Hardware family
FANUC teach pendant, main board, CMOS and controller battery alarms

FANUC SYST-066 (“PAUSE Teach Pendant communication error”): Communication with the advanced Teach Pendant was interrupted. First check: Too much communication may have d the interrupt.

Updated 2026-10-22 · LogrobotLM reference

Description

Communication with the advanced Teach Pendant was interrupted.

Remedy

Too much communication may have d the interrupt. Check the teach pendant cable.

Field diagnosis

Communication with the teach pendant was interrupted, possibly by excessive traffic.

What to check

  • Check the teach pendant cable and replace it if necessary.
  • Note: PAUSE alarm: the program resumes after repair.

Related codes

SYST-023SYSTEM Teach Pendant communication errorSYST-164WARN Teach Pendant communication errorSYST-165PAUSE TP intermittent communication errorSYST-064WARN Bad scan table dataSYST-065ABORT SFCALC overrunSYST-067SYSTEM Panel HSSB disconnect

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 →