Danfoss VLT AutomationDrive EZ FC 321 Programming Manual page 79

VLT® AutomationDrive EZ FC 321
Programming Guide
Enter the frequency points to form a U/f characteristic manually matching the motor. The voltage at each point is defined in param-
eter 1-55 U/f Characteristic - U. This parameter is an array parameter [0–5] and is only accessible when parameter 1-01 Motor Control
Principle is set to [0] U/f.
Motor Voltage
Par 1-55 [x]
1-55[5]
1-55[4]
1-55[3]
1-55[2]
1-55[1]
1-55[0]
1-56 1-56 1-56
[0] [1] [2]
Illustration 32: U/f Characteristic
Parameter 1-58 Flying Start Test Pulses Current
Table 110: Parameter 1-58 Flying Start Test Pulses Current
1-58 Flying Start Test Pulses Current
Default value: Size related
Conversion index: 0
This parameter is only available in VVC
This parameter has effect on PM motors only.
Sets the current level for the flying start test pulses that are used to detect the motor direction. 100% means I
be high enough to avoid noise influence, but low enough to avoid affecting the accuracy (current must be able to drop to 0 before
the next pulse). Reduce the value to reduce the generated torque. Default is 30% for asynchronous motors, but may vary for PM
motors. For adjusting PM motors, the value tunes for back EMF and d-axis inductance of the motor.
Parameter 1-59 Flying Start Test Pulses Frequency
Table 111: Parameter 1-59 Flying Start Test Pulses Frequency
1-59 Flying Start Test Pulses Frequency
Default value: Size related
Conversion index: 0
Asynchronous motor: Set the frequency of the flying start test pulses that are used to detect the motor direction. For asynchronous
motors, the value 100% means that the slip is doubled. Increase this value to reduce the generated torque. For synchronous motors,
this value is the percentage n
start mode is selected in parameter 1-70 Start Mode.
Danfoss A/S © 2021.08
1-56
1-56 1-56
[5]
[3] [4]
Output Frequency
Par 1-56 [x]
Parameter type: Range, 0 - 200%
Data type: Uint16
N O T I C E
+
.
N O T I C E
Parameter type: Range, 0 - 500%
Data type: Uint16
of the free-running motor. Above this value, flying start is always performed. Below this value, the
m,n
Parameter Descriptions
Setup: All setups
Change during operation: False
. Adjust the value to
m,n
Setup: All setups
Change during operation: False
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