Estimates the electrical angle of the rotor and uses this as a starting point. Standard selection for
automation applications.
The parking function applies DC current across the stator winding and rotates the rotor to electrical
0 position (typically selected for HVAC applications). Parking current and time are configured in pa-
rameter 2-06 Parking Current and parameter 2-07 Parking Time.
Combining rotor detection with the parking function.
Parameter 1-71 Start Delay
Table 122: Parameter 1-71 Start Delay
Parameter type: Range, 0 - 25.5 s
Change during operation: True
This parameter refers to the start function selected in parameter 1-72 Start Function. Enter the time delay required before commenc-
ing acceleration.
Parameter 1-72 Start Function
Table 123: Parameter 1-72 Start Function
Default value: [2] Coast/delay time
Change during operation: True
Select the start function during start delay. This parameter is linked to parameter 1-71 Start Delay.
Energize the motor with a DC hold current (parameter 2-00 DC Hold Current) during the start delay time.
Energize the motor with a DC brake current (parameter 2-01 DC Brake Current) during the start delay time.
Motor coasted during the start delay time (inverter off).
Only possible with VVC+. Connect the function described in parameter 1-74 Start Speed [RPM] and param-
eter 1-76 Start Current in the start delay time. Regardless of the value applied by the reference signal, the
output speed applies the setting of the start speed in parameter 1-74 Start Speed [RPM] or parameter 1-75
Start Speed [Hz], and the output current corresponds to the setting of the start current in parameter 1-76
Start Current. This function is typically used in hoisting applications without counterweight and especial-
ly in applications with a cone-motor where the start is clockwise, followed by rotation in the reference
direction.
Only possible with VVC+. For obtaining the function described in parameter 1-74 Start Speed [RPM] and
parameter 1-76 Start Current during the start delay time. The motor rotates in the reference direction. If the
reference signal equals 0, parameter 1-74 Start Speed [RPM] is ignored and the output speed equals 0. The
output current corresponds to the setting of the start current in parameter 1-76 Start Current.
For the function described in parameter 1-74 Start Speed [RPM] only. The start current is calculated auto-
matically. This function uses the start speed in the start delay time only. Regardless of the value set by
the reference signal, the output speed equals the setting of the start speed in parameter 1-74 Start Speed
[RPM]. [3] Start speed/current clockwise and [5] VVC+/Flux clockwise are typically used in hoisting applica-
AU275636650261en-000101 / 130R033496 | Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide
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