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Deceleration time

P103

(deceleration time)

0 ... 320.00 s

Deceleration time the time corresponding to the linear frequency reduction from the set maximum

frequency to 0 Hz (P105). If a prevailing setpoint of <100% is used, the deceleration time

{ 2.00 }

decreases accordingly.

Deceleration time can be extended by certain circumstances such as the selected >Switch-off

mode< (P108) or >Ramp rounding-off< (P106).

NOTE:

Make sure parameter values are realistic. A setting of P103 = 0 is not permissible for drive units!

Notes on ramp gradient: see parameter (P102)

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Minimum frequency

P104

(minimum frequency)

0.0 ... 400.0 Hz

The minimum frequency is the frequency supplied by the VFD as soon as it is enabled and no

additional setpoint is set.

{ 0.0 }

These are added to the set minimum frequency in combination with other setpoints (e.g. analog

setpoint or fixed frequencies).

This frequency is not reached when

This frequency can be continuously not reached if the "Maintain Frequency" function (digital input

function = 9) is executed during acceleration or braking.

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Maximum frequency

P105

(maximum frequency)

0.1 ... 400.0 Hz

The frequency supplied by the VFD after being enabled and once the maximum setpoint is

present, e.g. analog setpoint corresponding to P403, an appropriate fixed frequency or maximum

via the Simple Box/Parameter Unit.

This frequency can only be exceeded through slip compensation (P212), the "Maintain

Frequency" function (digital input function = 9) or switching to another parameter set with a lower

maximum frequency.

Maximum frequencies are subject to certain restrictions, e.g.

•

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{ 50.0 } DIP7 = off

{ 60.0 } DIP7 = on

(chapter 4.3.2.2)

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140

a. the drive is accelerated from standstill.

b. the VFD is blocked. The frequency then decreases to the absolute minimum frequency

(P505) before it is blocked.

c. the VFD reverses. The rotating field reverses at the absolute minimum frequency (P505).

restrictions in the field weakening mode,

compliance with mechanically permissible speeds,

PMSM: maximum frequency restricted to a value that is slightly above the rated frequency.