Danfoss iC7 Series Application Manual page 116

Application Guide | iC7 Series Industry
The AMA must be conducted with the motor at standstill.
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Avoid generating external torque during AMA.
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The AMA cannot run with a sine-wave filter connected.
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Uncoupling the load from the motor is not needed.
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The duration of the AMA depends on the power rating of the motor.
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Changing the product label data in parameter group 4.2.2 Motor Nameplate Data also modifies the data in the parameter group
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4.2.3 Induction Motor or 4.2.4 Permanent Magnet Motor.
The parameter automatically switches back to Off after the AMA has been performed.
NOTE:
P 4.2.1.4 Rs Measurement at start
Determine when a Rs measurement is performed.
Default Value:
0 (Off)
Parameter 432
Number:
Data Type: UINT
The following are the selections for the parameter.
Selection Number Selection Name
0 Off
1 First start after power on
2 Every start
3 First start with store
Use Rs measurement at start to measure the resistance of the stator (Rs) before motor start, for induction and permanent magnet motors
running FVC+. For induction motors, the rotor resistance (Rr) is also provided.
Accurate motor parameters are important for optimum motor performance, and measuring resistances before starting the motor can
help compensate for variation caused by changes in motor operating temperature.
It is important that the shaft is not rotating when the measurement is made. If it cannot be guaranteed, use DC hold to stop the shaft
before start.
P 4.2.1.5 Motor Cable Length
Set the motor cable length.
Default Value: 100
Parameter
425
Number:
Data Type: REAL
116 | © 2024.05
Parameter Type:
Unit:
Access Type:
Selection Description
Select this setting to disable Rs measurement. To reset the
triggering, this setting must be selected in between the other
methods.
Select performing a Rs measurement at the first start after the
drive is powered on.
A Rs measurement is performed before every start.
Enable performing a Rs measurement at the first start. The
measurement is stored.
Parameter Type:
Unit:
Access Type:
Parameter Descriptions
Selection
–
Read/Write
Range (0 — 10000)
m
Read/Conditional Write
AB480436531518en-000601 / 136R0283