FANUC Alarm SRVO-051 — SERVO CUER alarm
Error- Hardware
- servo amplifier
- Controllers
- R-J3iB / R-30iA / R-30iB
- FANUC class
- SERVO2
Manufacturer wording — SERVO CUER alarm(Group:%d Axis:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC SRVO-051 (“SERVO CUER alarm”): The offset of a current feedback is excessively large. First check: 1. Replace the servo amplifier. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-10-22 · LogrobotLM reference
Description
The offset of a current feedback is excessively large.
Remedy
1. Replace the servo amplifier. 2. If this does not clear the alarm, verify that all connectors are securely connected.
Field diagnosis
The current measurement offset is too large: the amplifier detection circuit is faulty.
What to check
- Replace the servo amplifier; no adjustment is possible.
- Note: Hard fault, present from power-up.
Part to check / replace
FANUC SRVO-051 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 →