12 Chapter 2 - Introduction
User Manual
Standard functions
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Feed voltages generated from intermediate circuit voltage by switching technology.
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Reduced motor noise thanks to special PWM control technology.
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Output protected against short circuits between phases and to ground.
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Possibility of switching motors in and out of the drive output (see section 5.2.3).
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Protection against over-current, over-voltage and under-voltage.
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Ability to withstand mains power outages of up to 15 ms (see section 7.6 for automatic restart programming).
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Sinsoidal output current from sinusoidal PWM.
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Smooth, controlled motor rotation even at very low speeds.
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Programmable slip compensation to minimise load-related speed variation.
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Manual or automatic low speed voltage boost.
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Automatic voltage and frequency control in case of overload to avoid motor stalling.
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Keypad or RS 485 serial line parameter control.
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Linear or S acceleration/deceleration ramps.
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DC braking with the following control modes:
a - digital input control;
b - automatic braking below a set frequency;
c - pre-start braking for pumps and fans rotated by liquid or air movement prior to electrical start-up, to prevent switching
on a motor that is already rotating.
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Wide selection of V/f ratios.
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Overload level control.
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Non-volatile memory for the last 4 alarm event messages; messages not lost even if power is switched off.
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Set speed signalling via potential-free contacts or over a serial line for signalling e.g. zero speed.
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Digital parameter or serial line referencing.
Advanced functions available from the complete version
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Referencing with 0...10 V, -10...10 V, 0...20 mA, 4...20 mA analog signal.
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Choice of open loop or closed loop functioning.
Options
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RS 485 serial line control card (to be specified at time of order)
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E
2
PROM key for saving custom settings.
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Remote keyboard kit.
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Serial keyboard.
