LogrobotLM

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FANUC Main board — Main CPU board

FANUC spare part — Updated 2026-09-16

Also written “Mainboard”.

FANUC Main board — Main CPU board — is referenced by 13 FANUC fault codes in the LogrobotLM catalogue — including FRCE-161, FRCE-215, SRVO-001. Those are the faults that put this part under suspicion; confirm the real cause against your robot's backup before ordering a replacement.

Orderable part numbers

  • A16B-3200-0600main CPU board, dual EthernetR-30iA
  • A20B-3300-07888-axis servo card, FSSB, mounts on main CPU boardR-30iA
  • A16B-3200-0730main board A with Ethernet, 5 serial portsR-30iB
  • A16B-3200-0780main CPU boardR-30iB
  • A16B-3200-0810main CPU board, standard (RS232C 1ch, I/O Link slave)R-30iB Plus
  • A16B-3200-0412robot control main CPU board
  • A20B-8200-0790main CPU board, standard (Ethernet 1ch)R-30iB Mate
  • A20B-8200-0792main CPU board (Ethernet 2ch, vision, force sensor, PMC, HDI)R-30iB Mate
  • A05B-2450-H001GBO main boardR-J3iB

Controller generation matters — always match the exact variant on your unit's label before ordering.

Fault codes that point to this part

Searching for a Main board? These FANUC faults name it among the parts to check. Open any one for the meaning and what to check — then confirm which cause is really yours before ordering.

Often diagnosed together

Parts cited by the same faults as Main board — check the whole chain before concluding. · Organes cités par les mêmes défauts que Main board.

CPU card6 shared codesAxis control card3 shared codesPanel board3 shared codesForce control board2 shared codesServo amplifier2 shared codesE-stop unit1 shared code

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 →