CACR-SR15BC1KS-Y427
CACR-SR15BC1KS-Y427 is an OEM customized full digital AC Servopack from YASKAWA Yasnac VS800 CACR-SR servo series, rated for 1.5kW 200V-grade special CNC machine tools and customized automatic production equipment. The suffix Y427 represents exclusive factory-locked customized firmware with fixed I/O pin assignment, preset encoder specifications and write-protected core control parameters, which cannot be replaced directly by standard non-Y marked CACR-SR15BC1KS general version without dedicated firmware rewriting by authorized manufacturer.
Model code explanation: CACR stands for VS800 servo series designed for CNC feed axis motion control; SR means hardware supports dual command input including ±10VDC analog speed signal and differential pulse position instruction; numeral 15 refers to 1.5kW rated matching servo motor; BC is revised customized main control PCB and peripheral circuit different from standard BB layout; digit 1 means separated power supply with independent three-phase main power and single-phase isolated control power; KS is basic standard base software version; Y427 is exclusive OEM solidified firmware with locked loop gain, fixed encoder resolution and preset control algorithm. Only Y427 specified incremental encoder servo motor can run normally with this driver.
Description
1. Product Overview
CACR-SR15BC1KS-Y427 is an OEM customized full digital AC Servopack from YASKAWA Yasnac VS800 CACR-SR servo series, rated for 1.5kW 200V-grade special CNC machine tools and customized automatic production equipment. The suffix Y427 represents exclusive factory-locked customized firmware with fixed I/O pin assignment, preset encoder specifications and write-protected core control parameters, which cannot be replaced directly by standard non-Y marked CACR-SR15BC1KS general version without dedicated firmware rewriting by authorized manufacturer.
Model code explanation: CACR stands for VS800 servo series designed for CNC feed axis motion control; SR means hardware supports dual command input including ±10VDC analog speed signal and differential pulse position instruction; numeral 15 refers to 1.5kW rated matching servo motor; BC is revised customized main control PCB and peripheral circuit different from standard BB layout; digit 1 means separated power supply with independent three-phase main power and single-phase isolated control power; KS is basic standard base software version; Y427 is exclusive OEM solidified firmware with locked loop gain, fixed encoder resolution and preset control algorithm. Only Y427 specified incremental encoder servo motor can run normally with this driver.
2. Electrical Specifications
Main circuit input is three-phase AC200V~230V, compatible with 50Hz and 60Hz power supply system, allowable input voltage fluctuation ranges from minus fifteen percent to plus ten percent of rated voltage. Control power adopts independent single-phase AC200V~230V to isolate interference caused by main circuit voltage fluctuation.
Continuous rated output RMS current is 11.7A. Overload performance is set as 150% rated current for continuous 60-second operation and 300% peak overload limited within 3 seconds during motor startup. The driver uses IGBT sine-wave PWM modulation with maximum output frequency of 300Hz, nominal DC bus working voltage is DC280V~DC320V. Terminals P and BN are reserved for external regenerative braking resistor wiring to consume regenerative energy under frequent deceleration and emergency stop conditions. Protection grade is IP20 and only vertical cabinet installation is permitted, net weight of the whole unit is around 3.3kg. CN2 feedback port is fixed for Y427 specified incremental encoder only and absolute encoder with backup battery is not supported.
Exclusive customized feature for Y427: core parameters such as encoder resolution, speed and position loop gain and default control mode are locked inside customized firmware and cannot be modified via local parameter menu. RS422 serial communication only supports reading real-time running data and historical fault logs, parameter upload and download functions are fully disabled by program lock, default working mode is fixed during factory programming.
3. Environmental and Installation Specifications
Operating ambient temperature ranges from 0°C to +55°C, storage temperature is from -20°C to +70°C. Working relative humidity keeps between 5% and 80% without condensation inside driver casing. Derate continuous output load properly when installation altitude exceeds 1000 meters above sea level.
Applicable vibration environment is 10Hz~55Hz with single vibration amplitude limited to 0.5mm. Reserve over 50mm ventilation clearance on top and bottom of servo inside electrical cabinet for heat dissipation. Disconnect all AC power supply and wait no less than 15 minutes for complete discharge of internal DC bus capacitor before opening casing or plugging CN1 and CN2 connectors; hot swap under powered status is strictly forbidden.
4. Terminal and Connector Description
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 connection.
CN1 is opto-isolated digital I/O connector following fixed Y427 OEM pin definition, most I/O signal functions cannot be redefined through parameter adjustment. CN2 is dedicated incremental encoder feedback port only compatible with original Y427 designated servo motor. Front panel seven-segment LED displays real-time running status and unified VS800 series standard fault codes.
5. Built-in Protection Functions
Complete protection system covers output overcurrent, DC bus overvoltage, DC bus undervoltage, internal drive overheat, encoder disconnection detection, long-time motor overload and main CPU abnormal protection. Latest ten groups of fault data are permanently stored in nonvolatile 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 mounted between P and BN terminals under heavy cyclic load and frequent emergency stop working condition.
6. Replacement and Maintenance Instructions
Only identical CACR-SR15BC1KS-Y427 can realize direct plug-and-play replacement. Standard non-Y427 KS model or other variant specifications cannot substitute directly due to different locked Y427 firmware and fixed I/O layout; non-Y427 driver needs authorized factory to flash exclusive Y427 custom program before replacement.
Check tightening status of power terminals 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 initialization reset is prohibited for Y427 customized model, reset will erase locked OEM preset parameters and result in abnormal equipment operation.
7. Common Troubleshooting Guidance
Overheat alarm is triggered by accumulated radiator dust, insufficient cabinet ventilation or long-term overload; solve by cleaning cooling fins or reducing actual running load. Encoder fault arises from loose CN2 connector, damaged feedback cable or mismatched non-Y427 specified 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 when attempting to modify locked Y427 parameters instead of hardware fault. Continuous overload alarm is caused by mechanical jamming or excessive payload; check mechanical structure and cut down machine load appropriately.
8. Standard Fault Code Definition
1 = Output overcurrent fault2 = Main circuit hardware abnormal malfunction3 = DC bus overvoltage protection activated4 = DC bus undervoltage alarm triggered5 = Drive internal overheat protection6 = Encoder disconnection fault7 = Motor continuous overload protectionA = Main CPU abnormal operation errorC = External emergency stop input effective
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