KUKA Error 2088 — SIGNAL INDEX TOO LARGE
Displayed as KSS02088 on KRC4 / KRC5 controllers
KUKA 2088 (“SIGNAL INDEX TOO LARGE”): The signal index is outside the available inputs or outputs. First check: Modify the program.
Updated 2026-09-09 · LogrobotLM reference
Cause
The signal index is outside the available inputs or outputs. Example: SIGNAL $DIGIN1 $IN[200] TO $IN[5000]
Effect
The program is not executable.
Troubleshooting
Modify the program.
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 →