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