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Braking time

P103

(Braking time)

0 ... 320.00 sec

The braking time is the time corresponding to the linear frequency reduction from the set

maximum frequency to 0 Hz (P105). If an actual setpoint <100 % is being used, the deceleration

{ 2.00 }

time reduces accordingly.

The braking time can be extended by certain circumstances, e.g. by the selected >Switch-off

mode< (P108) or >Ramp smoothing< (P106).

NOTE:

Care must be taken that the parameter values are realistic. A setting of P103 = 0 is not

permissible for drive units!

Notes concerning ramp steepness: 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 FI as soon as it is enabled and no

additional setpoint is set.

{ 0.0 }

In combination with other setpoints (e.g. analog setpoint of fixed frequencies) these are added to

the set minimum frequency.

This frequency is undershot when

This frequency can be continuously undershot if, during acceleration or braking, the function

"Maintain frequency" (Function Digital input = 9) is executed.

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Maximum frequency

P105

(Maximum frequency)

0.1 ... 400.0 Hz

The frequency supplied by the FI after being enabled and once the maximum setpoint is present,

e.g. analogue setpoint corresponding to P403, a correspondingly fixed frequency or maximum via

the SimpleBox / ParameterBox.

This frequency can only be overshot by the slip compensation (P212), the function "Maintain

frequency" (function digital input = 9) or a change to another parameter set with 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 FI is blocked. The frequency then reduces to the absolute minimum (P505) before it is

blocked.

c. The FI reverses. The reverse in the rotation field takes place at the absolute minimum

frequency (P505).

Restrictions in weak field operation,

Compliance with mechanically permissible speeds,