A16B-2200-0370 Fanuc PCB Board A16B22000370 AI6B-22OO-O37O

A16B-2200-0370 | FANUC 32-Bit 5th/6th Axis PCB — Series 0-C (Zero-C) Control / Two-Axis Expansion / A16B-2200 Series

Zero-C — FANUC's Compact CNC and Its Axis Limits

"Zero C Control" in the product description refers to the FANUC Series 0-C — FANUC's compact CNC marketed under the "Zero" series name. The "Zero" naming indicated a compact, economical CNC — powerful for its time but with defined limits on axis count. The standard Series 0-C configuration supports up to 4 controlled servo axes. For most CNC machine tools of the Series 0-C era, 4 axes was sufficient:

• CNC lathe: Z and X = 2 axes (standard), up to 4 with C-axis and Y-axis
• CNC machining centre: X, Y, Z = 3 axes (standard), up to 4 with a rotary table But some machines required more. When a Series 0-C CNC needed a 5th and 6th axis — for a dual turret lathe, a machining centre with two rotary axes, or a special-purpose machine — the A16B-2200-0370 provided the hardware path to this expanded axis count.

Key Product Information

Applications Requiring 5th and 6th Axes on Series 0-C

The types of machines that needed the A16B-2200-0370:

Twin-turret CNC lathes: A dual-turret turning centre has two independent turret assemblies — each with its own Z and X motion. The main board handles the primary turret (Z1, X1 as axes 1 and 2). A16B-2200-0370 adds the second turret's axes (Z2, X2 as axes 5 and 6).

CNC machining centres with 4+2 axis configurations: A machining centre with 3 primary linear axes (X, Y, Z) and 1 primary rotary axis may add 2 more servo axes — a second rotary axis and an auxiliary servo function — requiring the 5th and 6th axis expansion.

Special-purpose multi-axis machines: Transfer lines, multi-station machining systems, or purpose-built automation machines controlled by a Series 0-C CNC may need more than 4 servo axes to sequence their full mechanical complement.

Application Scenarios

Twin-turret 0-C lathe axis expansion board fault: A FANUC Series 0-C twin-turret CNC lathe develops servo alarms specifically on the second turret's axes (5 and 6). Primary axes function normally. The A16B-2200-0370 is identified as the fault. Replacement restores the 5th and 6th axis function. 4+2 machining centre axis board maintenance: A Series 0-C machining centre with 6 controlled axes undergoes control board maintenance. The A16B-2200-0370 is replaced as part of a comprehensive axis control system renewal.

FAQ

Q1: Does A16B-2200-0370 replace the main CPU board, or is it installed alongside it?

The A16B-2200-0370 is an expansion board installed alongside the Series 0-C main CPU board — not a replacement. The main board continues handling axes 1–4 plus the spindle. A16B-2200-0370 adds processing for axes 5 and 6 in a dedicated slot or connector position on the main board's option architecture. Both boards must be functional for the full 6-axis system to operate.

Q2: Can a Series 0-C CNC with A16B-2200-0370 operate in 4-axis mode if the expansion board fails?

When A16B-2200-0370 fails, the 5th and 6th axes generate alarms. Whether the CNC can continue operating on its first 4 axes depends on the machine's safety configuration — some machines require all configured axes to be healthy before allowing operation. Confirm from the machine's PMC programme behaviour whether a degraded 4-axis mode is possible.

Q3: Is A16B-2200-0370 specific to Series 0-C or also used in Series 0-D?

The description explicitly specifies "FOR ZERO C CONTROL" — the Series 0-C. The Series 0-D is a different hardware generation with its own axis expansion architecture. Confirm from the applicable hardware documentation before fitting A16B-2200-0370 in a Series 0-D system.

Q4: Does replacing A16B-2200-0370 require servo parameter re-entry for axes 5 and 6?

No. Servo parameters for all six axes — including axes 5 and 6 — reside in the CNC's main SRAM. After fitting the replacement A16B-2200-0370, the CNC re-applies the existing parameters to the 5th and 6th axis channels. Verify correct servo response on both expansion axes before returning to production.