1. Product Overview

Model Code Definition

• CACR: VS800 CNC feed-axis dedicated servo series for machine tool feed drive

• SR: Dual command input: ±10VDC analog speed + differential pulse position command input

• 15: Rated matching motor power 1.5kW

• BE: Standard main control PCB hardware layout

• 2: Separated independent power supply for main power circuit & control circuit

• 12G: Standard universal base firmware platform of VS800 G-version

• Y72: Exclusive OEM customized locked program code (fixed machine-specific tuning data + fixed IO definition, non-universal firmware)

Replacement note: Standard CACR-SR15BE12G cannot directly substitute Y72 unit; only identical CACR-SR15BE12G-Y72 is plug-and-play replacement, firmware rewrite required for cross-model replacement.

2. Electrical Standard Specifications (Hardware identical to standard 12G, only software customized)

• Main input: 3-phase AC200~230V, 50/60Hz, voltage tolerance: -15% ~ +10% rated input

• Control power: Independent single-phase AC200~230V separated power source

• Rated continuous output current: 11.7A; overload rating: 150% rated for 60s, 300% peak overload within 3s startup

• PWM modulation: Sine-wave IGBT drive, max output frequency:300Hz, DC bus nominal voltage DC280~320V

• Terminal P-BN: Reserved external regenerative braking resistor connection terminals

• Protection grade: IP20, vertical cabinet mounting only; net weight ≈3.3kg

• CN2 feedback: Only compatible with incremental encoder; absolute encoder disabled under original Y72 custom setting.

Exclusive Y72 Custom Software Limitations

1. Position loop gain, speed PI gain, S-curve acceleration/deceleration, notch filter parameters are factory preset & locked; user unauthorized to edit core tuning parameters

2. All CN1 opto-isolated digital I/O pin functions fixed by Y72 program, no parameter-based IO redefinition available

3. Control mode lock: Predefined single working mode (position/speed fixed per OEM machine design), free switching of speed/position/torque 3 modes is prohibited

4. RS422 serial communication: Support parameter reading only; important operational parameters write access blocked by firmware lock.

3. Ambient & Installation Conditions

• Operating temp: 0℃ ~ +55℃; storage temp: -20℃ ~ +70℃

• Working humidity:5%~80%RH, no internal condensation

• Derate output power when installation altitude＞1000m above sea level

• Vibration resistance:10~55Hz, max single amplitude 0.5mm

• Cabinet installation: Reserve ≥50mm upper/lower clearance for heat dissipation

• Maintenance rule: Cut off all AC power, wait ≥15min for DC bus capacitor full discharge before disassemble casing or plug/unplug CN1/CN2; hot swap under energized status strictly forbidden.

4. Terminal & Connector Description

• R/S/T: 3-phase main AC power input; U/V/W: Servo motor 3-phase power output

• P & BN: External dynamic braking resistor wiring terminals

• CN1: Optocoupler isolated programmable I/O, pin assignment fixed by Y72 customized program

• CN2: Incremental encoder dedicated feedback port

• Front panel 7-segment LED: Display running status + unified VS800 standard fault codes

5. Built-in Protection Functions

6. Maintenance & Replacement Guide

1. Preferred spare part: Original same model CACR-SR15BE12G-Y72; general 12G standard servo can’t direct replacement unless professional Y72 firmware flashing

2. Periodic inspection: Check tightness of power terminals & CN1/CN2 connectors before startup; clean radiator dust every 3~6 months to avoid overheat shutdown

3. Factory parameter initialization: After reset, all data restore to locked Y72 OEM preset values, temporary user modified data will be cleared entirely.

7. Common Troubleshooting

• Overheat alarm: Radiator dust blockage / poor cabinet ventilation / mechanical overload → clean cooling fin or reduce machine operating load

• Encoder error: Loose CN2 connector, damaged feedback cable or non-original mismatched motor → inspect wiring & use matched incremental servo motor

• Deceleration overvoltage: Install external braking resistor between P and BN terminals

• Parameter writing failure: Normal Y72 firmware lock design, unlock needs official Yaskawa customized program rewrite.

8. VS800 Unified Fault Code List