5 Parameter
BU 0800 en-4521 61
P103 Deceleration time P
{ 2.00 }
The deceleration time is the time corresponding to the linear frequency reduction from
the set maximum frequency P105 to 0 Hz. If an actual setpoint <100 % is being used,
the deceleration time reduces accordingly.
The deceleration time can be extended by certain circumstances, e.g. by the selected
“Disconnection mode” P108 or “Ramp smoothing” P106.
Care must be taken that the parameter values are realistic. The setting P103 = 0 is
not permissible for the drive units!
Notes on ramp gradient: see P102
P104 Minimum frequency P
The minimum frequency is the frequency supplied by the FI as soon as it is enabled
and no additional setpoint is set.
In combination with other setpoints (e.g. fixed frequencies), these are added to the set
minimum frequency.
This frequency is undershot when
• The drive is accelerated from standstill.
• The FI is blocked. The frequency then reduces to the absolute minimum frequency
P505 before it is blocked.
• The FI reverses. Reversal of the rotation field takes place at the absolute minimum
frequency P505.
This frequency can be continuously undershot if the function "Maintain the freq.” (Digit
inputs function = 9) was executed during acceleration or deceleration.
P105 Maximum frequency P
{ 50.0 }
The frequency supplied by the FI after being enabled and once the maximum setpoint
is present, (e.g. a correspondingly fixed frequency or maximum via a ParameterBox).
This frequency can only be exceeded by the slip compensation P212, the function
“Maintain the freq.” (Digit inputs function = 9) and the switch to another parameter set
with lower maximum frequency.
Maximum frequencies are subject to certain restrictions, e.g.
• Restrictions in weak field operation,
• Compliance with mechanically permissible speeds,
• PMSM: Restriction of the maximum frequency to a value which is slightly above
the nominal frequency. This value is calculated from the motor data and the input
voltage.
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