CACR-SR15BC1KS-Y396 is an OEM customized full-digital AC Servopack under YASKAWA Yasnac VS800 CACR-SR servo family, rated for 1.5kW 200V-grade dedicated CNC machine tools and special automation production lines. The suffix Y396 refers to exclusive factory-locked customized firmware with fixed I/O definition, preset encoder matching parameters and write-protected core control coefficients, which differs greatly from standard general CACR-SR15BC1KS without customized Y suffix.

Breakdown of model code: CACR represents VS800 servo series developed for CNC feed axis motion control; SR means the hardware supports dual command input including ±10VDC analog speed signal and differential pulse position command; number 15 corresponds to 1.5kW rated matching servo motor; BC stands for modified customized main control PCB and peripheral circuits different from conventional BB board layout; digit 1 adopts separated power supply structure with independent three-phase main power and single-phase isolated control power; KS is base standard software version while Y396 is special OEM solidified firmware customized for specific equipment. This drive only works normally with Y396 specified incremental encoder servo motors, and regular non-Y396 servo cannot replace directly unless authorized manufacturer rewrites exclusive Y396 firmware on replacement hardware.

Main circuit input is three-phase AC200V~230V, applicable for 50Hz and 60Hz power grids, allowable input voltage fluctuation ranges minus fifteen percent to plus ten percent of rated value. Control power is fed by independent single-phase AC200~230V to avoid interference from main circuit voltage swing.

Continuous rated output current is 11.7A RMS. Overload specification is 150% rated current for continuous 60-second operation and 300% peak overload limited within 3 seconds during motor startup. The servo uses IGBT sine-wave PWM modulation with maximum output frequency up to 300Hz. Nominal DC bus operating voltage is DC280V to DC320V, terminals P and BN are reserved for external regenerative braking resistor connection to consume regenerated energy under frequent deceleration and emergency stop working conditions. Protection grade is IP20 and only vertical cabinet installation is permitted, net weight of single unit is approximately 3.3kg. CN2 feedback port is exclusively designed for Y396 fixed-resolution incremental encoder without internal backup battery circuit for absolute encoder access.

Core customized features of Y396: key parameters including encoder resolution, partial speed and position loop gain values as well as default control mode are locked inside customized firmware and cannot be edited via local parameter menu. RS422 serial communication only supports reading real-time running data and historical fault records; parameter upload and download functions are fully disabled by program restriction, and default operating mode is fixed during factory programming.

Operating ambient temperature ranges from 0°C to +55°C, storage temperature covers -20°C to +70°C. Working relative humidity keeps between 5% and 80% without condensation on internal components. Reduce continuous output load accordingly when installation altitude exceeds 1000 meters above sea level.

Applicable vibration environment is 10Hz~55Hz with single vibration amplitude limited to 0.5mm. Reserve more than 50mm ventilation space on top and bottom of the servo inside control cabinet to ensure smooth heat dissipation. Cut off all AC power supply and wait no less than 15 minutes for full discharge of internal DC bus capacitor before opening casing or plugging CN1 and CN2 connectors; hot swapping of connectors under powered state is strictly prohibited.

R, S, T terminals connect three-phase main AC input power cable; U, V, W terminals link three-phase power wiring of matched servo motor. P and BN terminals are used for external regenerative braking resistor wiring.

CN1 is opto-isolated digital I/O connector following fixed Y396 OEM pin assignment, most I/O signal functions cannot be redefined by parameter adjustment. CN2 is dedicated incremental encoder port only compatible with original Y396 designated servo motor. Front panel seven-segment LED displays real-time running status and standard VS800 series fault codes.

Complete protection mechanism includes output overcurrent, DC bus overvoltage, DC bus undervoltage, drive internal overheat, encoder disconnection, long-time motor overload and main CPU abnormal protection. Latest ten fault records are permanently stored in internal memory without data loss after power off or manual fault reset.

Internal dynamic brake circuit handles regular low-load deceleration energy dissipation; external braking resistor must be installed between P and BN terminals when running under heavy cyclic load and frequent emergency stop working condition.

Direct plug-and-play replacement is only available with identical CACR-SR15BC1KS-Y396. Standard KS general model or other servo variants cannot substitute directly due to mismatched locked Y396 firmware and fixed I/O layout; replacement requires factory to reload exclusive Y396 customized program.

Check tightness of power wiring and CN1/CN2 connectors before each startup, clean radiator dust every three to six months to avoid overheat shutdown caused by poor heat dissipation. Full factory parameter reset is forbidden for Y396 customized model, as reset will erase OEM preset fixed parameters and trigger abnormal machine operation.

Overheat alarm is caused by blocked radiator dust, insufficient cabinet ventilation or long-term overload, fix by cleaning cooling fin or lowering actual equipment load. Encoder fault occurs from loose CN2 plug, damaged feedback cable or mismatched non-Y396 motor, inspect wiring and replace original matched incremental motor.

Deceleration overvoltage fault can be eliminated by installing external braking resistor between P and BN terminals. Parameter write failure alert is normal software protection triggered when modifying locked Y396 parameters instead of hardware fault. Overload alarm originates from mechanical jamming or excessive payload, check mechanical structure and reduce driving load properly.

1 = Output overcurrent fault2 = Main circuit hardware abnormality3 = DC bus overvoltage protection activated4 = DC bus undervoltage alarm5 = Drive internal overheat protection6 = Encoder disconnection fault7 = Motor continuous overload protectionA = Main CPU abnormal operationC = External emergency stop input effective