FANUC Alarm PNT1-704 — Zero turbine speed timeout
Manufacturer wording — %sZero turbine speed timeout
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT1-704 (“Zero turbine speed timeout”): All of the conditions were set for the turbine to be spinning but a zero speed was measured for a set time period. First check: If the turbine can be seen spinning, check the following: the speed sensor interface and speed sensor pickup.
Updated 2026-09-17 · LogrobotLM reference
Description
All of the conditions were set for the turbine to be spinning but a zero speed was measured for a set time period. This might be due to no turbine air pressure or pilot air pressure. One of the following items might be broken: the I/P transducer, speed sensor pickup, speed sensor interface. The Zero speed timeout might be set too short.
Remedy
If the turbine can be seen spinning, check the following: the speed sensor interface and speed sensor pickup. Otherwise, check the other items listed above. Possibly increase the Zero speed timeout by about 50%.
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 →