CACR-SR15BC1AF-Y276 is customized OEM AC Servopack under YASKAWA Yasnac VS800 CACR-SR full digital servo series with rated matching power 1.5kW for 200V industrial CNC and automation equipment. Y276 stands for exclusive factory-customized fixed firmware version with locked partial core control parameters and dedicated preset I/O definition for designated special machine tool matching, different from standard general AF specification model.

Model coding explanation: CACR represents VS800 servo series dedicated for CNC feed axis motion control; SR denotes dual instruction receiving circuit supporting ±10VDC analog speed command and differential pulse position signal input; digit 15 means compatible rated 1.5kW servo motor; BC refers to customized mainboard circuit layout different from universal BB version with modified internal peripheral circuit; numeral 1 separates main power and control power supply structure; AF is standard base program edition while suffix Y276 marks special OEM locked firmware solidified by factory, fixed encoder matching rule and non-editable partial loop parameters. This drive can only pair with Y276-specified incremental encoder servo motor; ordinary standard CACR-SR15BC1AF without Y276 customized program cannot replace directly unless manufacturer rewrites exclusive Y276 firmware to target unit.

Main circuit input adopts three-phase AC200V~230V, compatible with 50Hz and 60Hz industrial power grid, allowable input voltage fluctuation range is -15%~+10% of rated voltage value. Control power source is independent single-phase AC200V~230V to isolate voltage fluctuation interference from main power loop.

Rated continuous output current is 11.7A RMS; overload performance is defined as 150% rated current sustainable for 60 seconds continuous operation and 300% peak overload limited within 3 seconds during motor startup stage. This servo applies IGBT sine-wave PWM modulation technique with maximum output frequency 300Hz, normal DC bus working voltage ranges DC280V~DC320V. Terminals P and BN are reserved for external regenerative braking resistor connection to consume feedback energy under frequent deceleration and emergency stop working condition. Overall protection grade reaches IP20 and only allows vertical upright installation inside control cabinet, net weight of single unit is around 3.3kg. CN2 feedback interface exclusively matches designated incremental encoder with factory preset 6000P/R fixed resolution; absolute encoder wiring and built-in backup battery function are not supported on this port.

Key customized electrical feature for Y276 version: core parameters including partial speed loop gain, fixed encoder resolution and default control mode are locked inside firmware and forbidden to be modified via local parameter setting menu. RS422 serial communication function only supports real-time running data and historical fault record reading; parameter upload, download and batch modification operations are disabled by customized program restriction. Default control mode is analog speed priority fixed mode set by factory programming.

Permitted operating ambient temperature spans from 0°C to +55°C; storage environment temperature ranges -20°C to +70°C. Applicable working relative humidity keeps between 5%~80%RH without condensation inside drive casing. When installation altitude exceeds 1000 meters above sea level, users need to properly reduce continuous output load to prevent overheat protection trigger.

Allowable working vibration condition is 10Hz~55Hz with maximum single vibration amplitude 0.5mm. Keep more than 50mm empty ventilation gap on top and bottom of servo inside cabinet for effective heat dissipation. Cut off all AC input power and wait minimum 15 minutes for full discharge of internal DC bus capacitor before opening casing or plugging CN1, CN2 connectors; hot plugging under powered status is strictly prohibited by operation specification.

R/S/T three terminals connect three-phase AC main input power cable; U/V/W terminals link three-phase power wiring of matched servo motor. P and BN terminals serve for external regenerative braking resistor wiring to consume regenerative energy generated during rapid deceleration.

CN1 is opto-isolated digital I/O connector with fixed Y276 OEM pin assignment; most input/output signal functions cannot be redefined through parameter adjustment. CN2 is exclusive incremental encoder feedback port only compatible with original Y276 designated servo motor. Front panel seven-segment LED displays real-time running status and unified VS800 series fault alarm codes during equipment operation.

Complete multi-protection system covers output overcurrent, DC bus overvoltage, DC bus undervoltage, drive internal overheat, encoder disconnection detection, motor long-time overload and CPU operation abnormality protection functions. Latest ten groups of fault data are stored permanently in internal nonvolatile memory without data loss after power-off or manual fault reset operation.

Internal embedded dynamic brake circuit handles regular low-load deceleration energy dissipation; external braking resistor must be mounted between P and BN terminals under heavy cyclic load and frequent emergency stop application scenarios.

Only identical CACR-SR15BC1AF-Y276 can realize direct plug-and-play replacement. Conventional AF standard model or other variant specifications cannot substitute directly due to different locked Y276 firmware and fixed I/O allocation; non-Y276 unit replacement requires official manufacturer to refresh exclusive customized Y276 program on target drive.

Check wiring tightness of power terminals and CN1/CN2 connectors before every equipment startup; clean radiator accumulated dust every three to six months to avoid unexpected overheat shutdown caused by poor heat dissipation. Full factory parameter reset operation is forbidden on Y276 customized model, reset will erase factory preset locked OEM parameters and lead to abnormal motor operation or machine failure.

Overheat alarm mainly originates from blocked radiator dust, insufficient cabinet ventilation or long-term overloaded running; solve issue via cleaning cooling fin or reducing actual equipment running load properly. Encoder fault occurs from loose CN2 plug, damaged feedback cable or mismatched non-Y276 specified servo motor; troubleshoot by checking wiring integrity and replacing original matched incremental motor.

Deceleration overvoltage fault can be eliminated by installing external braking resistor between P and BN terminals. Parameter write failure pops up when users try to revise Y276 locked parameters, which belongs to normal software protection instead of hardware breakdown. Continuous overload alarm is triggered by mechanical transmission jamming or excessive payload; inspect mechanical structure and cut down machine load reasonably.

1 = Output overcurrent fault2 = Main circuit hardware malfunction3 = DC bus overvoltage protection activated4 = DC bus undervoltage alarm triggered5 = Drive internal overheat protection6 = Encoder wire break or disconnection fault7 = Motor continuous overload protectionA = Main CPU abnormal operation errorC = External emergency stop signal input effective