Order now the A16B-3200-0610 — Atlantechdrives provides this FANUC Servo Amplifier Control Circuit Board, the internal control PCB of the FANUC A06B-6107-H001 6-Axis Servo Amplifier for R-J3iC and R-30iA robot controllers. Essential for restoring full 6-axis servo operation in FANUC high-payload robots. Available with express worldwide delivery and 12-month warranty.
What Is the A16B-3200-0610?
The A16B-3200-0610 is the Servo Amplifier Control Circuit Board installed inside the FANUC A06B-6107-H001 6-Axis Servo Amplifier. While the A20B-2101-0234 and A20B-2101-0224 boards handle high-voltage power conversion, the A16B-3200-0610 is the intelligence layer of the amplifier — it manages the FANUC Serial Servo Bus (FSSB) optical fiber communication with the R-J3iC or R-30iA robot controller, processes position and velocity commands for all six axes, executes the current control loops, and monitors fault conditions across the entire amplifier unit. In the event of a control board failure, the amplifier loses communication with the robot controller entirely, resulting in a complete loss of all six servo axes simultaneously rather than individual axis faults — a key diagnostic indicator that helps distinguish control board failures from power board failures in the field. The A16B-3200-0610 belongs to FANUC’s A16B-3200 series of servo control PCBs, which are used across multiple FANUC amplifier generations and robot controller platforms. The board communicates with the robot controller via the FSSB (FANUC Serial Servo Bus), a high-speed optical fiber serial interface that transmits position commands and receives encoder feedback at microsecond update rates.
Key Technical Specifications
- Part Number: A16B-3200-0610
- Board Type: Servo Amplifier Control Circuit Board (internal PCB)
- Parent Unit: FANUC A06B-6107-H001 6-Axis Servo Amplifier
- Compatible Controllers: FANUC R-J3iC, FANUC R-30iA
- Communication Bus: FSSB — FANUC Serial Servo Bus (optical fiber)
- Axes Controlled: 6 (J1 through J6)
- Companion Boards in Same Unit: A20B-2101-0234 and A20B-2101-0224 (power boards)
- PCB Series: A16B-3200 (FANUC servo control board family)
- Manufacturer: FANUC Ltd., Oshino-mura, Yamanashi, Japan
- Status: Discontinued — available as surplus/replacement part
FSSB Architecture and Control Function
The A16B-3200-0610 implements the FANUC Serial Servo Bus (FSSB) slave interface, which is the proprietary high-speed communication backbone used in FANUC robot and CNC systems to connect the controller CPU to servo amplifiers. FSSB uses optical fiber cabling to achieve noise immunity and high-speed data transfer — typically operating at 16 Mbps with a position control cycle of 500 µs or less. The control board receives position and torque commands from the R-30iA controller CPU for each of the six robot joints (J1–J6), executes the velocity and current control algorithms in real time, generates PWM (Pulse Width Modulation) gating signals for the power stage IGBTs on the A20B-2101-0234 and A20B-2101-0224 boards, and returns encoder feedback data and diagnostic status to the controller. It also monitors overcurrent, overvoltage, overheat, and regeneration conditions across all six axis output stages, generating the appropriate servo alarm codes when fault thresholds are exceeded. Because the A16B-3200-0610 interfaces directly with the encoder pulse coder signals from the servo motors via the controller cable harness, encoder count errors and absolute position data loss can also originate from control board failures rather than from the motors or encoders themselves.
Expert Tips
When diagnosing a suspected A16B-3200-0610 failure, first verify that the FSSB optical fiber cables between the R-30iA controller and the amplifier are clean and undamaged — FSSB communication errors are commonly caused by contaminated or bent fiber connectors rather than PCB failure, and replacement of a functional control board will not resolve a fiber optic link fault. Inspect both ends of the FSSB fiber cables for dust, scratches, or discolouration before condemning the board. If the R-30iA teach pendant displays alarm SRVO-062 (FSSB communication error) or SRVO-063 (FSSB init error), and the fiber cables are confirmed good, the A16B-3200-0610 should be treated as the primary suspect. After installing a replacement board, the servo parameters stored in the controller (axis gain settings, current limits, motor type codes) must be verified in the robot controller configuration — the board itself does not store axis parameters, which remain in the R-30iA controller memory and are not lost during board replacement. Always perform a master calibration check after any servo amplifier board replacement on FANUC robots with absolute pulse coders, as any interruption of pulse coder battery power during the board swap may cause loss of the absolute zero reference position.
Frequently Asked Questions
Q: How do I distinguish a A16B-3200-0610 control board failure from a A20B-2101-0234 power board failure in the A06B-6107-H001?
A: A control board failure typically causes a complete loss of FSSB communication with all six axes simultaneously — the R-30iA will generate SRVO-062 or SRVO-063 alarms and the amplifier 7-segment display will show no axis activity. A power board failure typically affects one axis group and generates axis-specific servo alarms (SV-043 DCAL, SV-044 HVAL, SV-045 HCAL) with the other axes potentially remaining functional. This distinction helps identify which internal PCB to replace before purchasing parts.
Q: Does replacing the A16B-3200-0610 require re-parameterisation of the robot?
A: No re-parameterisation is required. All servo parameters (motor type, axis gains, current limits, encoder type) are stored in the R-30iA controller memory, not on the A16B-3200-0610 board itself. After installing a replacement board, the controller will automatically re-establish FSSB communication and load the existing parameters. However, a mastering check is strongly recommended after any servo amplifier board replacement to verify that absolute encoder positions remain valid.
Q: Is the A16B-3200-0610 compatible with the updated A06B-6107-H001#B amplifier variant?
A: The A06B-6107-H001#B is the revised version of the original A06B-6107-H001, introduced by FANUC to replace it. The #B variant uses the updated internal PCB set including an A20B-2101-0221 power board (instead of A20B-2101-0224) alongside A20B-2101-0234 and A16B-3200-0610. The A16B-3200-0610 control board is shared between both the original and #B amplifier variants, confirming cross-compatibility at the control board level.
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