CACR-SR15BB1ES is an OEM customized AC Servopack from YASKAWA Yasnac VS800 full digital servo series with rated 1.5kW for 200V grade industrial and CNC equipment application. Different from open-parameter standard BM version, ES version adopts factory prelocked partial parameter firmware and fixed I/O configuration for exclusive matching of designated special automation equipment and numerical control machine tools.

Model code explanation: CACR stands for VS800 servo series specially developed for CNC feed axis control. SR means the internal hardware is designed with dual command input circuit supporting ±10VDC analog control signal and differential pulse position signal. Numeral 15 represents the servo is matched with 1.5kW rated servo motor. BB is standard universal main control PCB and common peripheral I/O circuit layout. Digit 1 stands for separated power supply structure including three-phase AC200~230V main power and independent single-phase AC200~230V control power. ES refers to customized fixed firmware edition with pre-set encoder parameters and partial locked control coefficients configured at factory. This servo can only work normally with ES-specified incremental encoder servo motors; general standard CACR-SR15BB1BM cannot replace it directly unless original ES dedicated firmware is rewritten by professional manufacturer.

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

Continuous rated output current reaches 11.7A RMS. Overload specification is defined as 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 300Hz. Nominal DC bus working voltage is DC280V to DC320V, terminals P and BN are reserved for external regenerative braking resistor wiring to consume feedback energy under frequent deceleration and emergency stop conditions. Protection grade is IP20 and only supports vertical cabinet installation, net weight of the whole unit is approximately 3.3kg. CN2 feedback port is exclusively for designated incremental encoder without built-in absolute encoder backup battery circuit.

Core loop parameters such as fixed encoder resolution and partial speed loop gain are write-protected by ES firmware, users cannot revise these settings through local parameter modification. Default control mode is fixed by factory program and mode switching function is locked. RS422 serial communication only supports reading real-time operating data and historical fault records, parameter upload and download operations are forbidden by firmware restriction.

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

Applicable vibration condition is 10Hz~55Hz with single vibration amplitude 0.5mm. Reserve over 50mm ventilation clearance on top and bottom inside control cabinet to ensure smooth heat dissipation. Disconnect all AC power and wait at least 15 minutes for full discharge of internal DC bus capacitor before opening casing or plugging CN1 and CN2 connectors; hot swap of connectors under powered state is strictly prohibited.

R, S, T terminals connect three-phase main AC input power cable; U, V, W terminals connect three-phase power cable 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 ES OEM pin definition, most I/O functions cannot be redefined via parameter setup. CN2 is dedicated incremental encoder port only compatible with original specified servo motor for ES model. Front panel seven-segment LED displays real-time running status and standard VS800 series fault codes.

Complete protection functions cover output overcurrent, DC bus overvoltage, DC bus undervoltage, drive overheat, encoder disconnection, motor continuous overload and CPU abnormal operation protection. Latest ten fault data are permanently stored in internal memory without loss after power off or manual fault reset.

Internal dynamic brake circuit is used for regular low-load deceleration energy dissipation; external braking resistor must be installed between P and BN terminals under heavy cyclic load and frequent emergency stop working environment.

Direct plug-and-play replacement is only available with identical CACR-SR15BB1ES. Standard BM and other BF/CS series servo cannot substitute directly due to different locked firmware and fixed I/O definition, replacement needs factory to reload ES 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 initialization is prohibited for ES model, reset will erase OEM preset fixed parameters and lead to abnormal machine running.

Overheat alarm is triggered by accumulated radiator dust, poor cabinet ventilation or long-term overload; fix by cleaning cooling fin or reducing running load. Encoder fault arises from loose CN2 connector, damaged feedback cable or mismatched non-designated 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 happens when modifying locked ES parameters, which is normal software protection instead of hardware fault. Overload alarm is caused by mechanical jamming or excessive payload; check mechanical structure and cut down equipment load properly.

1 = Output overcurrent fault2 = Main circuit hardware abnormal3 = DC bus overvoltage protection activated4 = DC bus undervoltage alarm5 = Drive internal overheat protection6 = Encoder disconnection fault7 = Motor continuous overload protectionA = Main CPU operation errorC = External emergency stop input effective