LogrobotLM

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FANUC Alarm DX-004 — STOP Illegal schedule number

FANUC DX-004 (“STOP Illegal schedule number”): Invalid Delta Tool/Frame schedule number. First check: Check all schedule numbers used within the specified program to verify that they are within the allowable range specified for the $DXSCH[] system variable.

Updated 2026-09-17 · LogrobotLM reference

Description

Invalid Delta Tool/Frame schedule number.

Remedy

Check all schedule numbers used within the specified program to verify that they are within the allowable range specified for the $DXSCH[] system variable.

Related codes

DX-002STOP Error allocating data memoryDX-003STOP No system variablesDX-005WARN Schedule already enabledDX-006WARN Schedule not enabled

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 →