5 Parameter
BU 0250 en-3021
87
P104
Minimum frequency
(Minimum frequency)
P
0.0 ... 400.0 Hz
{ 0.0 }
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. analog setpoint of fixed frequencies) these are added to
the set minimum frequency.
This frequency is undershot when
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).
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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P105
Maximum frequency
(Maximum frequency)
P
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.
•
Restrictions in weak field operation,
•
Compliance with mechanically permissible speeds,
•
PMSM: Maximum frequency restricted to a value that is slightly above the nominal frequency.
This value is calculated from the motor data and the input voltage.
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Summary of Contents for NORDAC LINK SK250E-FDS
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