Control features PWM Sine-weighted PWM output voltage control with dead-time compensation.
Ultra-low acoustic noise realised by high-frequency carrier wave.
Torque Torque Vector control or manual torque boost with slip compensation.
Auto-tune Auto tuning function as standard. Enables automatic calculation of the
total load values of %R and %X.
Operation Key Pad RUN, STOP.
facilities External FWD, REV and coast-to-stop BX. External fault trip THR. Alarm/trip
signal inputs
reset RST. Two- or three-wire RUN/STOP control. External selection of
V/f ratio, Accel./Decel., Torque Boost and Thermal Overload for 2nd motor.
Preset speeds Seven preset speeds selection X1, X2, X3; 8 additional preset speeds, X4.
Speed Key Pad Raise and lower speed, ∧ and ∨ keys.
reference Potentiometer 1kΩ, 1W external control.
Analog I/P 0 to +5V DC, 0 to +10V DC and 4-20mA DC.
Digital I/P ‘Motorised pot.’, or 7 or 15 preset speeds.
Serial communications RS485 optional.
Voltage-dip ride-through VXS inverters can be operated continuously when the supply voltage is
≥165V (1-ph) or ≥310V (3-ph). Operating time if <165V (1-ph) or
<310V (3-ph) = 15ms. Smooth recovery selectable.
Run status Digital O/P RUN, FDT, FAR, LU, TL, IP
(1)
selectable outputs at terminal Y1E.
signals Analog O/P At terminal FMA, the following status signals are selectable:
O/P frequency, O/P current, O/P torque %, load factor %.
Pulse O/P At terminal FMP, O/P frequency multiplying factor adjustable from 10
to 100.
Accel/Decel Time 0.01 to 3600s. There are two independently-adjustable sets of accelera-
tion and deceleration times.
Characteristic Choice of linear or two types of S-curve accel/decel pattern.
Voltage/Frequency V/f Automatic AVR control of V/f characteristic at base frequency.
Output voltage at base frequency adjustable from 80V to 240V, 1-ph;
160V to 480V, 3-ph. Base frequency is selectable for two motors.
Frequency Limiter Output frequency can be held within selectable high and low limits.
Bias Analog frequency reference can be biased from -400Hz to +400Hz, in
steps of 1Hz.
Gain An adjustable gain can be applied to the analog frequency reference,
range to 250%.
Skip-frequency Three preset skip (jump) frequencies, 0 to 400Hz in steps of 1Hz.
Bandwidth (hysteresis) for jump frequencies, 0 to 30Hz in steps of 1Hz.
Slip compensation Selectable compensation to maintain speed when load torque changes.
Auto-restart Four selectable modes of operation.
Torque boost Auto Boost adjusts automatically according to the calculated load torque
value.
Manual 31 patterns selectable as follows:
Squared torque characteristic; Proportional torque characteristic;
Weak linear boost… adjustable in 28 steps to… strong linear boost.
4
3 Common Specifications
(1)
FDT = Frequency detected; FAR = ‘At speed’ window; LU = Undervoltage protection trip operated; TL =
Inverter at torque limit; IP = Inverter auto-restarted after restoration of I/P power following momentary loss.
3.1 Control
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