Toshiba VF-AS1
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Control system: Sinusoidal PWM control
Output voltage adjustment: Main circuit voltage feedback control. (Switchable between automatic adjustment/fix/control off)
Output frequency range: Setting between 0.01 to 500Hz. Default max. frequency is set to 0.01 to 60Hz.
Maximum frequency: adjustment (30 to 500Hz)
Minimum setting steps of frequency: 0.01Hz: operation panel input (60Hz base),
0.03Hz: analog input (60Hz base, 11 bit/0 to 10Vdc)
Frequency accuracy: Analog input: ±0.2% of the maximum output frequency (at 25±10°C)
Digital input: ±0.01%±0.022Hz of the output frequency
Voltage/frequency characteristics:
V/f constant, square reduction torque control, automatic torque boost, vector calculation control, base frequency adjustment 1, 2, 3, and 4 (25 to 500Hz), V/f 5-point arbitrary setting, torque boost adjustment (0 to 30%), start frequency adjustment (0 to 10Hz), stop frequency adjustment (0 to 30Hz)
Frequency setting signal: 3kΩ potentiometer (possible to connect to 1 to 10kΩ-rated potentiometer)
0 to 10Vdc (input impedance Zin: 30kΩ), 0 to ±10Vdc (Zin: 22kΩ), 4 to 20mAdc (Zin:242Ω)
Terminal board base frequency: The characteristic can be set arbitrarily by two-point setting. Compliant with 6 types of input; analog input (RR, VI/II, RX, AI1, AI2), and pulse input. (*AI1, AI2, pulse input: optional)
Frequency jump: 3 places. Setting of jump frequency and width.
Upper and lower limit frequencies: Upper limit frequency: 0 to max. frequency, lower limit frequency: 0 to upper limit frequency
PWM carrier frequency: 200V-45kW and below, 400V-75kW and below : Adjustable between 1.0 to 16kHz
200V-55kW and above, 400V-90kW and above: Adjustable between 2.5 to 8kHz
PID control: Adjustment of proportional gain, integral time, differential time and delay filter
Torque control: Voltage command input specification: DC 0 to ±10V
Acceleration/deceleration time: 0.01 to 6000 sec. Selectable from among acceleration/deceleration. times 1, 2, 3 and 4. Automatic acceleration/deceleration function. S-pattern acceleration/deceleration 1 and 2 pattern adjustable.
DC braking: Adjustment of braking start frequency (0 to 120Hz), braking (0 to 100%) and braking time (0 to 20 sec.).
With emergency stop braking function and motor shaft fix control function.
Forward run/reverse run: With F-CC closed to forward run, with R-CC closed to reverse run, with both closed to reverse run. With PWR-CC opened to coast stop. Emergency stop by panel operation or terminal board.
Jog run: Jog mode, if selected, allows jog operation from the operation panel
Jog run operation by terminal board is possible by setting the parameters.
Preset speed operation: By changing the combination of open/close between S1, S2, S3, RR/S4-CC, set frequency + 15-speed operation.
Selectable between acceleration/deceleration time, torque limit and V/f by set frequency.
Retry: Capable of restarting after a check of the main circuit elements in case the protective function is activated. Max. 10 times selectable arbitrarily. Waiting time adjustment (0 to 10 sec.)
Soft stall: Automatic load reduction control at overloading. (Default: OFF)
Cooling fan ON/OFF: The cooling fan will be stopped automatically to assure long life when unnecessary.
Operation panel key operation ON/OFF control: Key prohibition selectable between STOP key only, MODE key only, etc. All key operations can be prohibited.
Regenerative power ride-through control: Possible to keep the motor running using its regenerative energy in case of a momentary power failure. (Default: OFF)
Auto-restart operation: Possible to restart the motor in coasting in accordance with its speed and direction. (Default: OFF)
Simplified pattern operation: Possible to select each 8 patterns in 2 groups from 15-speed operation frequency. Max. 16 types of operation possible. Terminal board operation/repeat operation possible.
Commercial inverter switching: Possible to switch operation by commercial power source or inverter
Light-load high-speed operation: Increases the operating efficiency of the machine by increasing the rotational speed of the motor when it is operated under light load.
Drooping function: When two or more inverters are used to operate a single load, this function prevents load from
concentrating on one inverter due to unbalance.
Override function: External input signal adjustment is possible to the operation frequency command value.
Protective function: Stall prevention, current limit, overcurrent, overvoltage, short circuit on the load side, ground fault on the load side [Note 6], undervoltage, momentary power failure (15ms or more), non-stop control at momentary power failure, overload protection, arm overload at starting, overcurrent on the load side at starting, overcurrent and overload at dynamic braking resistance, overheat, emergency stop
Electronic thermal characteristic: Switchable between standard motor/constant torque VF motor, adjustment of overload protection and stall prevention level.
Alarms: Stall prevention during operation, overload limit, overload, undervoltage on power source side, DC circuit undervoltage, setting error, in retry, upper limit, lower limit.
Causes of failures: Overcurrent, overvoltage, overheat, short circuit on the load side, ground fault on the load side, inverter overload, arm overcurrent at starting, overcurrent on the load side at starting, CPU error, EEPROM error,
RAM error, ROM error, communication error, (dynamic braking resistor overcurrent/overload), (emergency stop), (undervoltage), (low current), (overtorque), (motor overload), (input phase failure), (output phase failure)
The items in the parentheses are selectable.
Monitoring function: Operation frequency, operation frequency command, forward run/reverse run, output current, DC voltage, output voltage, compensated frequency, terminal board input/output information, CPU version,
past trip history, cumulative operation time, speed feedback, torque, torque command, torque current, exiting current, PID feedback value, motor overload factor, inverter overload factor, PBR overload factor,
PBR load factor, input power, output power, peak output current, peak DC voltage, RR/S4 input, VI/II input, RX input, AI1 input, AI2 input, FM output, AM output, expansion I/O card option CPU version,
integral input power, integral output power, communication option reception counter, communication option abnormal counter
Free unit display: Display of optional units other than output frequency (motor speed, line speed, etc), current ampere/% switch, voltage volt/% switch
Automatic edit function: Searches automatically parameters that are different from the standard default setting parameters. Easy to find changed parameters.
