FANUC Alarm PNT1-420 — Error reading gun-on time for job
Manufacturer wording — %sError reading gun-on time for job
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT1-420 (“Error reading gun-on time for job”): Some process or processes within a job might have something wrong with their headers. First check: Display the DETAIL page for every process in the job.
Updated 2026-09-17 · LogrobotLM reference
Description
Some process or processes within a job might have something wrong with their headers.
Remedy
Display the DETAIL page for every process in the job. This should correct the problem.
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 →