H66 - Yaskawa Error Code

Is this a or a fault on a system that was previously working fine ? AI responses may include mistakes. Learn more Share public link

| Check | Required Condition | |---|---| | | H2‑21 ≤ H2‑22 (Comparator 1) | | Comparator Limits | H2‑27 ≤ H2‑28 (Comparator 2) |

Last updated: October 2025

: The host PLC or controller might have a programming error that activates both direction bits simultaneously during a cycle.

Ground the cable shield only at the drive end to prevent ground loops. yaskawa error code h66

In industrial environments with Variable Frequency Drives, high-frequency noise is omnipresent.

Keep communication cables at least 11.8 inches (30 cm) away from AC power and motor cables. If they must cross, cross them at a 90-degree angle. Is this a or a fault on a

| Terminal Pair | Check These Parameters | |---|---| | Terminals M1‑M2 | H2‑60 (Secondary Function) and H2‑01 (Output Selection) | | Terminals M3‑M4 | H2‑63 (Secondary Function) and H2‑02 (Output Selection) | | Terminals M5‑M6 | H2‑66 (Secondary Function) and H2‑03 (Output Selection) |