1. General Information

• Part Number: A16B-1100-0280/08A

• Manufacturer: FANUC

• Type: 3‑axis digital servo control PCB (triple channel, 2nd‑gen S‑series)

• Application: FANUC 6058 AC servo drive units (A06B-6058‑H32x), controls up to three servo axes

• Revision: /08A (hardware version)

• Motor Compatibility: 0S / 1S / 2S / 3S / 10S series AC servo motors

• CNC Compatibility: FANUC 0, 10, 11, 12, 15 series CNC systems

2. Core Functions

• 3‑Axis PWM Control: Current, speed, and position loop processing for three axes simultaneously

• Feedback Interface: Serial encoder (α/β type) input, position/speed feedback processing

• Command I/F: Analog/digital speed command, servo enable, direction, alarm output

• Protection Logic: Overcurrent, overvoltage, undervoltage, overheat, encoder fault, speed deviation

• Onboard Diagnostics: LED status indicators for power, alarm, and axis‑specific faults

3. Electrical Specifications

• Control Power: +5 V, ±15 V DC (from drive power supply)

• Signal Level: TTL/analog (±10 V speed command)

• PWM Frequency: High‑speed switching for precise current control

• Isolation: Optical isolation between CNC and drive power stages

4. Mechanical & Environmental

• Dimensions (H×W×D): Approx 330 × 230 × 35 mm

• Weight: Approx 1.0 kg

• Mounting: Vertical installation inside 6058 servo drive unit

• Operating Temperature: 0 °C to +55 °C (ambient)

• Storage Temperature: −30 °C to +85 °C

• Humidity: 10%–90% RH, non‑condensing

• Cooling: Forced air cooling via drive internal fan

5. Key Features

• Triple‑Axis Synchronization: Coordinated motion for 3‑axis machining (milling, turning)

• High‑Speed Processing: Real‑time loop control for rapid, accurate motion response

• Plug‑and‑Play: Direct replacement for A16B-1100-0280 series PCBs (compatible with all revisions)

• Rugged Industrial Design: Withstands vibration, electrical noise, and continuous operation

• Comprehensive Protection: Shuts down drive safely during fault conditions to prevent damage

6. Common Alarm Codes (Drive Level)

• SV‑01: Overcurrent → Check motor wiring, insulation, or power module

• SV‑02: Overvoltage → Verify input voltage, regeneration circuit

• SV‑03: Undervoltage → Check power supply, fuses, or wiring

• SV‑04: Overheat → Inspect cooling fan, heat sink, or ambient temperature

• SV‑05: Speed deviation → Check encoder, cable, or motor load

• SV‑06: Encoder error → Verify encoder connection, cable, or encoder unit

7. Maintenance & Handling

• ESD Protection: Use anti‑static wristband when handling PCB

• Visual Inspection: Check for burnt components, swollen capacitors, or loose connectors

• Cleaning: Remove dust from PCB surface and connectors every 3–6 months

• Connector Check: Ensure pins are secure and free of oxidation

• Voltage Verification: Confirm +5 V and ±15 V supply voltages

8. Safety Notes

• High Voltage: Power off drive and discharge capacitors (wait ≥10 minutes) before service

• Qualified Personnel: Only trained technicians should perform installation/maintenance

• Genuine Parts: Use FANUC original replacement parts to ensure reliability