FANUC Alarm ISD-087 — … ratio low (ISD…)
Manufacturer wording — %s ratio low (ISD%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC ISD-087 (“… ratio low (ISD…)”): The software has detected an excessively low ratio for the ISO/POLY mixture. First check: The deviation of the ISO/POLY ratio is greater than the “ISO/POLY Min Fault Ratio” level for a period of time greater than the “ISO/POLY Lo Ratio Flt T/O” duration.
Updated 2026-09-17 · LogrobotLM reference
Description
The software has detected an excessively low ratio for the ISO/POLY mixture. This is more severe than ISD-086, and may result in serious material application defects.
Remedy
The deviation of the ISO/POLY ratio is greater than the “ISO/POLY Min Fault Ratio” level for a period of time greater than the “ISO/POLY Lo Ratio Flt T/O” duration. Verify that the dispense equipment (pressure regulators, flow meters and spray modules, etc.) is functioning correctly. Verify that the settings on the Dispenser Setup screen are reasonable.
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 →