FANUC Alarm PNT2-557 — … Res:Hrd ratio is 0.0:0.0
Manufacturer wording — %s Res:Hrd ratio is 0.0:0.0
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT2-557 (“… Res:Hrd ratio is 0.0:0.0”): Checks for how far the flow rate is from the set point have been too high. First check: Check and change the transducer, replace the fluid regulator or service the surge suppression system on the fluid supply pump. Likely part: Fluid regulator (Fluid regulator).
Updated 2026-09-17 · LogrobotLM reference
Description
Checks for how far the flow rate is from the set point have been too high. Possible causes are:
Remedy
Check and change the transducer, replace the fluid regulator or service the surge suppression system on the fluid supply pump. If the alarm occurs on many or all colors then increase the Max. error from setpoint parameter.
Part to check / replace
FANUC PNT2-557 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →