KUKA Error 1077 — ACKNOWLEDGE TOO MANY DEVICES ON THE SERVO BUS
ErrorDisplayed as KSS01077 on KRC4 / KRC5 controllers
KUKA 1077 (“ACKNOWLEDGE TOO MANY DEVICES ON THE SERVO BUS”): Message following the status message "too many devices on the DSE drive bus <...>". First check: Acknowledge the message. Likely part: DSE (DSE digital servo electronics card).
Updated 2026-09-09 · LogrobotLM reference
Cause
Message following the status message "too many devices on the DSE drive bus <...>".
Effect
Speed stop. All active commands inhibited.
Troubleshooting
Acknowledge the message.
Part to check / replace
KUKA 1077 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →