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K-3
4) Common specifications
Item Description
Control method
Sinusoidal PWM control
Output voltage
adjustment
Main circuit voltage feedback control (Automatic regulation, "fixed" and "control off"
selections possible)
Output frequency range
0.01 to 400Hz, set to 0.01 to 80Hz by default, max. frequency adjustable from 30 to 400Hz
Frequency setting
resolution
0.01Hz: operation panel input (60Hz base), 0.015Hz: analog input (60Hz base, 12/16
bit/0-10Vdc)
Frequency
precision
+/-0.2% of the max. output frequency (25+/-10°C): analog input, +/-0.01% (25+/-
10°C): digital input
Voltage/
frequency
characteristic
Constant V/f, variable torque, automatic torque boost, vector control and automatic energy-saving
control, base frequency 1
2 3 4 adjustment (25 to 400Hz) arbitrary V/f 5-point settings, torque boost
adjustment (0 to 30%), start-up frequency adjustment (0 to 10Hz), end frequency adjustment (0 to 30Hz)
Frequency setting
signal
3kΩ potentiometer (1 to 10kΩ-potentiometer connection also possible), 0 to 10Vdc
(input impedance Zin: 33kΩ ), 0 to +/-10Vdc (Zin: 67kΩ), 4 to 20mAdc (Zin: 500Ω)
Terminal board reference
frequency input
2 sources can be set from a total of seven types, including analog input (RR, VI, II,
RX, RX2), pulse and binary/BCD (*RX2 and binary/BCD: optional)
Frequency jump
Can be set in three places, jump frequency and band setting
Upper/lower limit
frequencies
Upper limit frequency: 0 to maximum frequency, lower limit frequency: 0 to upper
limit frequency
PWM carrier
frequency selections
Adjustable within a range of 0.5 to 15kHz
(0.5 to 8kHz for 200V 55kW model and 400V 75kW model,
0.5 to 5kHz for 200V 75-90kW models and 400V 110-280kW models)
PID control
Proportional gain, integral time, anti-hunting gain, filter delay adjustments
Control specifications
Torque control
Voltage control reference: DC0 to +/-10V
Acceleration/
deceleration time
0.01 to 6000 sec., acceleration/deceleration time selectable from among 1, 2, 3 and 4, automatic
acceleration/deceleration function, S-pattern acceleration/deceleration patterns 1 and 2 adjustment
DC injection
braking
Braking start frequency: adjustment (0 to 120Hz), braking current adjustment: ( 0 to 100%), braking time
adjustment: (0 to 10 sec.), emergency stop braking function, motor shaft stationary control function
Forward/reverse
run (*1)
Forward run F-CC "closed", reverse when R-CC "closed", reverse when both "closed"
coast stop when ST-CC "opened", Emergency stop from panel or terminal block
Jog run (*1)
Jog run from panel with JOG mode selection. Terminal block operation possible with
parameter settings.
Preset-speed
operation (*1)
Set frequency +15-speed preset speeds possible with open/close combinations. S1,
S2,S3, S4 and CC Acceleration/deceleration time, torque limit and V/f selectable on
a frequency.
Retry
When a protective function activities, after main circuit devices are checked, running
restarts. Settable to a max. of 10times. wait time adjustment (0 to 10sec)
Soft-stall
Automatic load reduction control during overload (Default setting: OFF)
Cooling fan ON/OFF
Fan is automatically stopped, When not necessary to ensure to extended life time.
Panel key
operation ON/OFF
switching
Prohibit functions such as reset only or monitor only etc., can be selected. All key
operations can be also prohibited. A protection reset function which requires special
operation to enable it is available.
Regenerative power
ride-through control
Operation is continued even during momentary power failure using regenerative
energy from the motor. (Default setting: OFF)
Auto-restart in
The motor can be restarted at the same speed in the same direction it run under no-
load conditions before stop. (Default setting: OFF)
Simple pattern
run
32 patterns in 4 groups (8 pattern in each group) can be set according to 15-speed
operation frequency. Up to 32 patterns of operation, control from terminal
board/repeated operation possible.
Commercial power/
inverter switching
Power supply to motor, switchable between commercial power and inverter
High-speed run at
low-load
With this function, the load applied to the motor can be monitored. Its rotating speed
is increased to improve the operation efficiency when the load applied to it is low.
Drooping function
This function prevent a load from being imposed to a single inverter because of
imbalance, when more than one inverter is used in combination to drive the load.
Operation specifications
Override function
Preset frequency control value adjustable by signals from an external control unit
Protective
function
Stall prevention, current limit, over-current, over-voltage, load-side short-circuit, load-side ground
fault(*7), undervoltage, momentary power failure (15ms or longer), regeneration power ride-through
control, electronic thermal overload protection, armature over-current during start-up, load-side
over-current during start-up, dynamic braking resistor overload, heat sink overheat, emergency stop
Electronic thermal
characteristic
Standard motor/constant-torque VF motor switching, electronic thermal stall
prevention operational level adjustment
Protection
Reset
Reset triggered by closing 1a-contact (or opening 1b-contact), by control panel operation, or
by turning on the power after turning off temporarily. Tripped state retention and clear settings
(Continued on the following page)