B&R ACOPOSinverter P84, User Manual

Page: 156 / 405

Programming guidelines
156 ACOPOSinverter P84 User's Manual 2.10
Motor parameters that can be accessed in the [expert] mode
This includes:
•
Parameters that are calculated by the inverter during autotuning in write-protected mode. For example,
R1r, calculated stator resistance in cold condition.
•
Some of these calculated parameters can be replaced by other values, if necessary. For example, R1w,
measured stator resistance in cold condition.
If a parameter Xyw is changed by the user, the inverter uses it instead of the calculated parameter Xyr.
Induction motor
If an autotuning is running or if a parameter of the motor that the autotuning depends on is amended,
the parameters (
[Rated mot. volt.]
(UnS) ,
[Rated motor frequency]
(FrS) ,
[Rated motor current]
(nCr) ,
[Rated motor speed]
(nSP) ,
[Rated motor power]
(nPr) ), put Xyw back to their factory settings.
Code Name/Description
rSM [R measured stator]
Stator resistance in cold condition, calculated by the inverter, in read-only mode. Value in milliohms (mΩ) to 75 kW (100 hp), in hundredths of
a milliohms (mΩ/100) over 75 kW (100 hp).
IdM [Calc. magnpower]
Magnetizing current in A, calculated by the inverter, in read-only mode.
LFM [Calculated stray field]
Leakage inductance in mH, calculated by the inverter, in read-only mode.
trM [T2r]
Rotor time constant in ms, calculated by the inverter, in read-only mode.
nSL [NSLr]
Nominal slip in Hz, calculated by the inverter, in read-only mode.
To change the nominal slip, change the [nominal motor speed] (nSP) ( see "Drive parameters (bFr - nSP)" on page 151 ).
PPn
[Number of pole pairs]
Number of pole pairs, calculated by the inverter, in read-only mode.
rSA
[Cust stator resist.]
Cold state stator resistance (per winding), modifiable value. In milliohms (mΩ) to 75 kW (100 hp), in hundredths of a milliohms (mΩ/100) over 75
kW (100 hp). On the integrated display terminal: 0 to 9999 then 10.00 to 65.53 (10000 to 65536).
IdA [Idw]
Magnetizing current in A, modifiable value.
LFA [LFw]
Leakage inductance in mH, modifiable value.
trA [Cust. rotor t const.]
Rotor time constant in ms, modifiable value.