A16B-2200-0341 Fanuc A16B-22OO-O341 PCB Tested In Good Condition

A16B-2200-0341 | FANUC PMC-M I/O Link ROM Master PCB — Series 0-C CNC / Robot Systems / Ladder Programme Execution / I/O Link

PMC-M — The Programmable Machine Controller for Series 0-C

In the FANUC Series 0-C CNC architecture, the PMC (Programmable Machine Controller) executes the machine's sequence logic — the ladder programme that governs all machine functions outside of cutting motion. Coolant, hydraulics, tool changers, door interlocks, operator panel responses — all are governed by PMC ladder rungs.

The "PMC-M" designation identifies the specific PMC model fitted to Series 0-C systems. The A16B-2200-0341 is the ROM master board for the PMC-M — the PCB that contains the PMC's programme memory (ROM) and serves as the I/O Link master.

Key Product Information

Revision Variants — PMC-M and PMC-M2

The A16B-2200-0341 exists in multiple hardware revisions with distinct application designations:

/04B (PMC-M): The standard PMC-M configuration for Series 0-C CNC machine tool applications. The PMC-M provides the base ladder programme execution and I/O Link master function for the CNC's machine interface.

/09A (PMC-M2 Robot ROM IO Link Board): A later revision confirmed by Next Day Automation for robot applications. The "M2" designation identifies an enhanced PMC-M capability level. This variant serves FANUC robot controllers that use the PMC-M architecture for their sequence control and I/O Link communication.

Application Scenarios

Series 0-C CNC PMC board fault: A FANUC Series 0-C CNC develops PMC alarms — machine sequences stop responding, I/O Link communication fails. The A16B-2200-0341 is identified as the fault. Replacement restores PMC ladder execution and I/O Link communication.

Robot PMC-M2 board maintenance: A FANUC robot controller using the PMC-M2 architecture requires A16B-2200-0341/09A for its sequence control board. The /09A revision is specifically identified before sourcing.

FAQ

Q1: What is the difference between PMC-M (/04B) and PMC-M2 (/09A) on the A16B-2200-0341?

The /04B revision is the standard PMC-M configuration for Series 0-C CNC applications. The /09A is the PMC-M2 variant — an enhanced PMC capability level confirmed for robot applications by Next Day Automation. The "M2" designation indicates a higher programme step capacity or extended instruction set compared to the base PMC-M. Always confirm the installed revision from the board label before sourcing a replacement.

Q2: Does replacing A16B-2200-0341 require PMC ladder programme reloading?

The A16B-2200-0341 contains ROM (Read-Only Memory) — the PMC system software and potentially the machine-specific ladder programme content is stored on this board. Replacing the board with a blank or different-content ROM means the machine's PMC sequence logic must be reloaded from backup. Always maintain a backup copy of the PMC ladder programme before any PMC board maintenance.

Q3: What CNC systems use the PMC-M with A16B-2200-0341?

Fanuc-controller.com confirms A16B-2200-0341 "particularly with Series 0-C controllers." The Series 0-C generation (0-MC, 0-TC, 0-MD, 0-TD, 0-MF, 0-TF) used the PMC-M architecture for their machine sequence control. DNC Electronics lists this board in their I/O Board category alongside other Series 0 era boards.

Q4: Is the A16B-2200-0341 specific to FANUC's own CNC systems or can it also serve third-party machine tools?

The A16B-2200-0341 serves FANUC Series 0-C CNC systems installed on machine tools built by any machine tool manufacturer using this CNC generation — including Japanese, German, Korean, Italian, and Taiwanese machine builders who specified FANUC 0-C as their CNC platform. The board is CNC-generation specific, not machine-builder specific.

Q5: What does the "I/O Link master" function mean in practical terms for the machine?

The I/O Link is FANUC's serial bus connecting the PMC to all external I/O devices — operator panel switches and lamps, machine body I/O units, and power magnetics I/O boards. The A16B-2200-0341 as the master means all 96 or 104 machine input signals and 56 or 72 output signals transit this board. When this board fails, the PMC loses access to all machine I/O — no machine functions can execute.