Item Specification
Control system Sinusoidal PWM control
Rated output voltage Adjustable within the range of 50 to
600V by correcting the supply voltage (not adjustable above the input voltage)
Output frequency range 0.5 to 500.0Hz, default setting: 0.5 to 80Hz, maximum
frequency: 30 to 500Hz
Minimum setting steps of frequency
0.1Hz: operation panel setting, 0.2Hz: analog input (when the max. frequency is 100Hz).
Frequency accuracy Digital setting: within ±0.01% of the max. frequency (-10 to +60°C)
Analog setting: within ±0.5% of the max. frequency (25 C ±10°C)
Voltage/frequency characteristics
V/f constant, variable torque, automatic torque boost, vector control, automatic energy-saving, dynamic automatic energy-
saving control. Auto-tuning. Base frequency (25 - 500Hz) adjusting to 1 or 2, torque boost (0 - 30%) adjusting to 1 or 2,
adjusting frequency at start (0.5 - 10Hz)
Frequency setting signal Potentiometer on
the front panel, external frequency potentiometer (connectable to a potentiometer with a rated impedance
of 1 - 10k ), 0 - 10Vdc (input impedance: VRF/VRF2=30k:),
4 - 20mAdc (Input impedance: 250 ).
Terminal board base frequency
The characteristic can be set arbitrarily by two-point setting. Possible to set individually for three functions: analog input
(VRF and VRF2) and communication command.
Frequency jump Three frequencies can be set. Setting of the jump frequency
and the range.
Upper- and lower-limit frequencies
Upper-limit frequency: 0 to max. frequency, lower-limit frequency: 0 to upper-limit frequency
PWM carrier frequency Adjustable within a range of 2.0 to 16.0Hz
(default: 4kHz).
PID control Setting of proportional gain, integral gain, differential gain and control wait time. Checking whether the amount of processing
amount and the amount of feedback agree.
Acceleration/deceleration time
Selectable from among acceleration/deceleration times 1, 2 or 3 (0.0 to 3200 sec.). Automatic acceleration/deceleration function.
S-pattern 1 or 2, and S-pattern value adjustable. Forced
rapid deceleration and dynamic rapid deceleration function.
DC braking Braking start-up frequency: 0 to maximum frequency, braking rate: 0 to 100%, braking time: 0 to 20 seconds, emergency DC
braking, motor shaft fixing control
Dynamic braking Control and drive circuit is built in the inverter with
the braking resistor outside (optional).
Input terminal function Possible to select from among 65 functions, such as forward/reverse run signal input, jog run signal input, operation base
signal input and reset signal input, to assign to 8 input terminals.
Logic selectable between sink and source.
Output terminal functions
Possible to select from among 58 functions, such as upper/lower limit frequency signal output, low speed detection signal
output, specified speed reach signal output and failure signal output, to assign to FL relay output, open collector output and
RY output terminals.
Forward/reverse run
The RUN and STOP/RESET keys on the operation panel are used to start and stop operation, respectively. The switching between
forward run and reverse run can be done from one of the three control units: operation panel, terminal board and external control unit.
Jog run Jog mode, if selected, allows jog operation from the operation p
anel or the terminal board.
Preset speed operation Base frequency + 15-speed operation possible by changing the
combination of 4 contacts on the terminal board.
Retry operation Capable of restarting automatically after a check of the main circuit elements in case the protective function is activated. 10
times (Max.) (selectable with a parameter)
Various prohibition settings
Possible to write-protect parameters and to prohibit the change of panel frequency settings and the use of operation panel
for operation, emergency stop or resetting.
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 In the event of a momentary power failure, the inverter reads the rotational speed of the coasting motor and outputs a
frequency appropriate to the rotational speed in order to restart the motor smoothly. This function can also be used when
switching to commercial power.
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 The sum of two analog signals (VRF/VRF2) can be used as a frequency command value.
Failure detection signal 1c-contact output: (250Vac-0.5A-cos I= 0.4)
Protective function Stall prevention, current limitation, over-current, output short circuit, over-voltage, over-voltage limitation, undervoltage,
ground fault, power supply phase failure, output phase failure, overload protection by electronic thermal function, armature
over-current at start-up, load side over-current at start-up, over-torque, undercurrent, overheating, cumulative operation time,
life alarm, emergency stop, braking resistor over-current/overload, various pre-alarms
Electronic thermal characteristic
Switching between standard motor and constant-torque AF motor, switching between motors 1 and 2, setting of overload trip
time, adjustment of stall prevention levels 1 and 2, selection of overload stall
Reset function Function of resetting by closing contact 1a or by turning off power or the operation panel. This function is also used to save
and clear trip records.
Alarms Stall prevention, overvoltage, overload, under-voltage, setting error, retry in process, upper/lower limits
Causes of failures Over-current, overvoltage, overheating, short-circuit in load, ground fault, overload on inverter, over-current through arm at
start-up, over-current through load at start-up, CPU fault, EEPROM fault, RAM fault, ROM fault, communication error.
(Selectable: Over-current through braking resistor/overload, emergency stop, under-voltage, low voltage, over-torque, motor
overload, output open-phase)
Monitoring function Operation frequency, operation frequency command, forward/reverse run, output current, voltage in DC section, output
voltage, torque, torque current, load factor of inverter, integral load factor of PBR, input power, output power, information on
input terminals, information on output terminals, version of CPU1, version of CPU2, version of memory, PID feedback
amount, frequency command (after PID), integral input power, integral output power, rated current, causes of past trips 1
through 4, information on life alarm, cumulative operation time
Past trip monitoring function
Stores data on the past four trips: number of trips that occurred in succession, operation frequency, direction of rotation, load
current, input voltage, output voltage, information on input terminals, information on output terminals, and cumulative
operation time when each trip occurred.
Output for frequency meter
Analog output (1mAdc full-scale DC ammeter or 7.5Vdc full-scale DC voltmeter/rectifier type AC voltmeter, 4 to 20mA/0 to
20mA output)
4-digit 7-segments LED Frequency: inverter output frequency.
Alarm: stall alarm "C", overvoltage alarm "P", overload alarm "L", overheat alarm "H".
Status: inverter status (frequency, cause of activation of protective function, input/output voltage, output current, etc.) and
parameter settings.
Free-unit display: arbitrary unit (e.g. rotating speed) corresponding to output frequency.
Indicator Lamps indicating the inverter status by lighting, such as RUN lamp, MON lamp, PRG lamp, % lamp, Hz lamp, frequency
setting potentiometer lamp, UP/DOWN key lamp and RUN key lamp. The charge lamp indicates that the main circuit
capacitors are electrically charged.
Use environments
Indoor, altitude: 1000m (Max.), not exposed to direct sunlight, corrosive gas, explosive gas / vibration (less than 5.9m/s2) (10 to 55Hz)
Ambient temperature -10 to +50°C
Note 1
Storage temperature -25 to +65°C
Relative humidity 20 to 93% (free from condensation and vapor).
Note 1. Above 40°C : Remove the protective seal from the top of the inverter.
Environments
Display function Protective function Operation specifications Principal control functions
(programmable)
(programmable)
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