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FANUC Alarm SRVO-006 — SERVO Hand broken

Error
Hardware
robot signals and connection cable
Controllers
R-J3iB / R-30iA / R-30iB
FANUC class
SERVO
Hardware family
FANUC brake, fuse, robot signal and position error alarms

FANUC SRVO-006 (“SERVO Hand broken”): The safety joint (if in use) might have been broken. First check: 1. Press the SHIFT key, and press the alarm release button to reset the alarm condition.

Updated 2026-10-22 · LogrobotLM reference

Description

The safety joint (if in use) might have been broken. Alternatively, the HBK signal on the robot connection cable might be a ground fault (0V) or a cable disconnection. If the Hand broken signal is not in use, it can be disabled by a software setting. Refer to the Controller Maintenance Manual for information on how to disable the Hand broken signal.

Remedy

1. Press the SHIFT key, and press the alarm release button to reset the alarm condition. Continuously press the SHIFT key, and jog the tool to the work area. 2. Replace the safety joint. 3. Check the safety joint cable. 4. Check the FS2 fuse on the servo amplifier. If the SRVO-214 Fuse blown alarm is also generated, the FS2 fuse has blown. 5. Verify the following for connector RP1 at the base of the robot: 6.  There are no bent or dislocated pins in the male or female connectors. 7.  The connector is securely connected.

Field diagnosis

The hand breakage circuit is open: either the breakaway device has actually given way, or the HBK signal in the robot connection cable is pulled to 0 V (wire break, ground fault).

What to check

  • Reset while holding SHIFT, then jog the tool clear.
  • Replace the breakaway joint if it is broken, otherwise check the HBK cable up to the end-effector connector.
  • If no sensor is fitted, disable the function in the system configuration rather than jumpering it.
  • Note: A hand breakage detected while the function is disabled gives SRVO-300/302, not SRVO-006.

Related codes

SRVO-300SERVO Hand broken/HBK disabledSRVO-302SERVO Set Hand broken to ENABLESRVO-009SERVO Pneumatic pressure alarmSRVO-004SERVO Fence openSRVO-005SERVO Robot overtravelSRVO-007SERVO External emergency stops

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 →