Industrial Automation Magazine India

Sinusoidal PWM control

Adjustable within the range of 50 to 330V (240V class) and 50 to 660V (500V class) by correcting the supply voltage

0.1 to 500.0Hz, default setting: 0.5 to 80Hz, maximum frequency: 30 to 500Hz

0.1Hz: analog input (when the max. frequency is 100Hz), 0.01Hz: Operation panel setting and communication setting.

Digital setting: within +/-0.01% of the max. frequency (-10 to +60 degreeC)
Analog setting: within +/-0.5% of the max. frequency (25 degreeC +/-10 degreeC)

V/f constant, variable torque, automatic torque boost, vector control, automatic energy-saving. dynamic automatic energy-saving control, PM motor control, V/F 5-point setting, Auto-tuning. Base frequency (20-500Hz) adjusting to 1 & 2, torque boost (0-30%) adjusting to 1 & 2, adjusting frequency at start (0.1-10Hz)

Setting dial on the front panel, external frequency potentiometer (connectable to a potentiometer with a rated impedance of 1k-10k ohm), 0-10Vdc / -10-+10Vdc (input impedance: 30k ohm), 4-20mAdc (Input impedance: 250 ohm).

The characteristic can be set arbitrarily by two-point setting. Possible to set: analog input (VIA, VIB, VIC).

Three frequencies can be set. Setting of the jump frequency and the range.

Upper-limit frequency: 0 to max. frequency, lower-limit frequency: 0 to upper-limit frequency

Adjustable range of 2.0k to 16.0kHz (default: 4.0kHz).

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.

Selectable from among acceleration/deceleration times 1 & 2 & 3 (0.0 to 3600 sec.). Automatic acceleration/deceleration function. S-pattern acceleration/ deceleration 1 & 2 and S-pattern adjustable. Control of forced rapid deceleration and dynamic rapid deceleration.

Braking start-up frequency: 0 to maximum frequency, braking rate: 0 to 100%, braking time: 0 to 25.5 seconds, emergency DC braking, motor shaft fi xing control.

Control and drive circuit is built in the inverter with the braking resistor outside (optional).

Possible to select from among about 110 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.

Possible to select from among about 150 functions, such as upper/lower limit frequency signal output, low speed detection signal output, specifi ed speed reach signal output and failure signal output, to assign to FL relay output, open collector output terminal, and RY output terminals.

The RUN and STOP keys on the operation panel are used to start and stop operation, respectively. Forward/reverse run possible through communication and logic inputs from the terminal block.

Jog mode, if selected, allows jog operation from the terminal board and also from remote keypad.

Base frequency + 15-speed operation possible by changing the combination of 4 contacts on the terminal board.

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)

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. Possible to write-protect parameters by setting 4 digits password and terminal input.

Possible to keep the motor running using its regenerative energy in case of a momentary power failure (default: OFF).

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.

Increases the operating effi ciency of the machine by increasing the rotational speed of the motor when it is operated under light load.

When two or more inverters are used to operate a single load, this function prevents load from concentrating on one inverter due to unbalance.

External input signal adjustment is possible to the operation frequency command value.

1c- contact output and 1a- contact output: Note2)
Maximum switching capacity : 250Vac-2A (At resistive load cos=1), 30Vdc-1A, 250Vac-1A (cos=0.4)
Minimum permissible load : 5Vdc-100mA, 24Vdc-5mA

Stall prevention, current limitation, over-current, output short circuit, over-voltage, over-voltage limitation, undervoltage, ground fault, detection, input 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, various pre-alarms

Switching between standard motor and constant-torque VF motor, switching between motors 1 & 2, setting of overload trip time, adjustment of stall prevention levels 1 & 2, selection of overload stall

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.

Over-current, overvoltage, overload, overheat, communication error, under-voltage, setting error, retry in process, upper/lower limits

Over-current, overvoltage, overheat, output short-circuit, ground fault, overload on inverter, arm overcurrent at start-up, overcurrent on the load side at start-up, CPU fault, EEPROM fault, RAM fault, ROM fault, communication error. (Selectable: dynamic braking resistor overload, emergency stop, under-voltage, small current, over-torque, motor overload, input phase failure, output phase failure)

Operation frequency, operation frequency command, forward/reverse run, output current, input voltage (DC detection), output voltage, torque, load factor of inverter, input power, output power, information on input terminals, information on output terminals, version of CPU1, version of CPU2, PID feedback value, frequency command (after compensation), causes of past trips 1to 8, parts replacement alarm, cumulative operation time, overload and region setting

Stores data on the past eight trips: number of trips that occurred in succession, operation frequency, opreation frequency command, forward/reverse run, output current, input voltage (DC detection), output voltage, information on input terminals, information on output terminals, and cumulative operation time when each trip occurred.

Analog output for meter: 1mA dc full-scale dc ammeter
0 - 20mA (4 to 20mA) output: DC ammeter (allowable load resistance: Less than 750 ohm)
0 - 10V output: DC voltmeter (allowable load resistance: Over 1k ohm)
Resolution: Maximum of 1/1000

Frequency: inverter output frequency.
Alarm: stall alarm "C", overvoltage alarm "P", overload alarm "L", overheat alarm "H". communication alarm "T"
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.

Lamps indicating the inverter status by lighting, such as RUN lamp, MON lamp, PRG lamp, % lamp, Hz lamp, EASY lamp, CANopen lamp, NET lamp. The charge lamp indicates that the main circuit capacitors are electrically charged.

Indoors; not exposed to direct sunlight, corrosive gas, explosive gas, fl ammable gas, oil mist, or dust; and vibration of less than 5.9m/s2 (10 to 55Hz).

3000 m or less (current reduction required over 1000 m) Note 3)

-10 to +60 degreeC Note 4)

-25 to +70 degreeC

5 to 95% (free from condensation and vapor).