4.2.8 1-7* Start Adjustments
Parameter 1-70 Start Mode
Table 122: Parameter 1-70 Start Mode
1-70 Start Mode
Default value: [0] Rotor detection
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
Select the start-up mode. This is done to initialize the VVC
+
control core for previously free-running motor. Both selections estimate
the speed and angle. Active for PM and SynRM motors in VVC
+
only.
Option Name
Description
[0]*
Rotor detection
Estimates the electrical angle of the rotor and uses this as a starting point. Standard selection for
VLT® AutomationDrive applications.
[1]
Parking
The parking function applies DC current across the stator winding and rotates the rotor to electri-
cal 0 position (typically selected for HVAC applications). Parking current and time are configured in
parameter 2-06 Parking Current
and
parameter 2-07 Parking Time
.
[2]
Rotor det. w/
parking
Parameter 1-71 Start Delay
Table 123: Parameter 1-71 Start Delay
1-71 Start Delay
Default value: 0 s
Parameter type: Range, 0 - 25.5 s
Setup: All setups
Conversion index: -1
Data type: Uint8
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 124: Parameter 1-72 Start Function
1-72 Start Function
Default value: [2] Coast/delay time
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
Select the start function during start delay. This parameter is linked to
parameter 1-71 Start Delay
.
Op-
tion
Name
Description
[0]
DC hold/
delay time
Energize the motor with a DC hold current (
parameter 2-00 DC Hold Current
) during the start delay time.
[1]
DC brake/
delay time
Energize the motor with a DC brake current (
parameter 2-01 DC Brake Current
) during the start delay
time.
[2]*
Coast/delay
time
Motor coasted during the start delay time (inverter off).
[3]
Start speed
cw
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
AU373327181955en-000101 / 130R1208 | 83
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
