1. Product Introduction

Model Code Explanation

• CACR: VS800 CNC feed-axis dedicated servo series;

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

• 15: Matched rated motor power 1.5kW;

• BE: Standard mainboard layout;

• 2: Independent separated power supply for main circuit & control circuit;

• 12G: Base universal G-type core firmware platform;

• Y56: Exclusive customized program version (OEM locked setting for specific lathe/machining center, fixed gain, fixed IO assignment).

2. Core Electrical Parameters (Same base hardware as 12G, customized software only)

Y56 Exclusive Software Features

1. Position loop gain, speed PI gain, acceleration/deceleration, notch filter parameters are preset and partially locked; key running parameters are prohibited from user free change to match original machine mechanical characteristic;

2. CN1 digital I/O pin definition is solidified per OEM machine wiring logic, cannot reassign IO function via parameter modification;

3. Three control modes (speed/position/torque) switching permission is restricted, only default machine designated control mode is enabled;

4. RS422 communication retains parameter read function, partial important parameter write authority is blocked by Y56 customized program lock.

3. Environmental & Installation Requirements

4. Terminal & Connector Definition

• R/S/T: Three-phase AC main input power; U/V/W: Servo motor three-phase power wiring; P,BN: External braking resistor terminals;

• CN1: Optocoupler isolated digital IO, pin function fixed by Y56 customized program;

• CN2: Incremental encoder feedback dedicated port;

  Front 7-segment LED displays running status and unified VS800 series standard fault codes.

5. Built-in Protection Functions

6. Replacement & Maintenance Notes

1. Preferred replacement part: identical CACR-SR15BE12G-Y56; common 12G standard drive cannot direct plug-and-play, must rewrite Y56 dedicated firmware by professional repair supplier;

2. Periodic maintenance: inspect tightness of power terminals and CN1/CN2 connectors before startup, clean radiator dust every 3~6 months to avoid overheat shutdown;

3. Factory parameter reset will restore to original locked Y56 OEM preset values, user modified temporary parameters will be cleared after reset.

7. Common Troubleshooting

• Overheat alarm: blocked radiator dust, poor cabinet ventilation or mechanical overload → clean cooling fins or reduce machine load;

• Encoder error: loose CN2 connector, damaged feedback cable or mismatched non-original motor → check wiring and use matched incremental motor;

• Deceleration overvoltage: add external braking resistor between P & BN terminals;

• Parameter cannot be written normally: caused by Y56 OEM parameter lock, this is normal customized design, unlock requires Yaskawa official firmware modification.

8. Standard Fault Code List