ABB Error 38104 — Measurement system / resolver fault
ErrorABB 38104 (“Measurement system / resolver fault”): Overspeed in teach mode: "Joint rob1_X connected to drive module 1 has exceeded the maximum permitted speed in teach mode" (exact wording of the French message, RobotWare 6.08 cabinet). Likely part: Measurement system / resolver +1 more.
Updated 2026-10-22 · LogrobotLM reference
What it means
Overspeed in teach mode: "Joint rob1_X connected to drive module 1 has exceeded the maximum permitted speed in teach mode" (exact wording of the French message, RobotWare 6.08 cabinet). The public message names the axis only in its long text, never in the title.
What to check
- Check whether the robot was moved manually in the Motors Off state.
- On an additional axis, check the commutation (motor shaft / resolver relationship), typically set incorrectly at installation.
- Check the measurement cable and its shielding.
- Note: Dominant hardware event in the field log: 18 occurrences over 26 days, spread over axes rob1_3, rob1_4, rob1_5 and rob1_6, with axis 4 in the lead. Its internal counterpart is entry 100000 "Refsup.c 728 REFSUP_ERROR_JOINTS_SPEED_MANUAL_MODE, physical_joint N", which names the axis directly and can trigger WITHOUT an associated 38104. Multi-axis recurrence = suspect the measurement harness or the SMB board rather than one particular axis.
Part to check / replace
ABB 38104 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 →