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FANUC Alarm FRCE-326 — Illegal F/S range (F:…)

Manufacturer wording — Illegal F/S range (F:%d^1)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC FRCE-326 (“Illegal F/S range (F:…)”): Bad values for the system variables $CCS_GRP.$RANGE_F[] and/or $CCS_GRP.$RANGE_T[]. First check: Default values are: $CCS_GRP.$RANGE_F[1],[2],[3] = 40 $CCS_GRP[1].$RANGE_T[1],[2],[3] = 400 Set the above values, then turn the controller OFF, then ON again.

Updated 2026-09-17 · LogrobotLM reference

Description

Bad values for the system variables $CCS_GRP.$RANGE_F[] and/or $CCS_GRP.$RANGE_T[].

Remedy

Default values are: $CCS_GRP.$RANGE_F[1],[2],[3] = 40 $CCS_GRP[1].$RANGE_T[1],[2],[3] = 400 Set the above values, then turn the controller OFF, then ON again.

Related codes

FRCE-324Illegal joint singular (F:…)FRCE-325Illegal F/S coord. system (F:…)FRCE-327Illegal F/C motion group (F:…)FRCE-328Illegal F/C motion group order (F:…)

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 →