Johnson Controls VFD66 Drive User Manual page 34

No Function
40
Number of motor poles
Auto: Automatically calculates the number of motor poles from the settings of Pr 07
and Pr 39
2P: Set for a 2 pole motor
4P: Set for a 4 pole motor
6P: Set for a 6 pole motor
8P: Set for an 8 pole motor
No Function
41
Voltage mode select
Ur S: Stator resistance is measured each time the drive is enabled and run
Ur: No measurement is taken
Fd: Fixed boost (V/Hz)
Ur A: Stator resistance is measured the first time the drive is enabled and run
Ur I: Stator resistance measured at each power up when the drive is enabled and run
SrE: Square law characteristic
In all Ur modes, the drive operates in open loop vector mode.
The drive default setting is Ur A mode, which means that the drive will carry out an
NOTE
autotune the first time the drive is powered up and enabled. If the load is not going to be
stationary when the drive is powered up and enabled the first time, then one of the other
modes should be selected. Not selecting another mode could result in poor motor
performance or OI.AC, It.AC or OV trips.
Once the autotune has been performed successfully in Ur A mode, Fixed boost mode
will then be used.
The Fixed boost mode should be used for multiple motor applications.
If the autotune fails i.e. trips on rS, due to no motor being connected, the voltage mode
NOTE
will then be Ur mode.
No Function
42
Low frequency voltage boost
Determines the boost level when Pr 41 is set to Fd or SrE.
The range is 0.0 to 50% of motor rated voltage.
No Function
45
Software version
No Function
55
Last trip
56 55
Trip before Pr
57 56
Trip before Pr
58 57
Trip before Pr
Indicates the last 4 trips of the drive.
34
Range
Auto, 2P, 4P, 6P, 8P
Range
Ur S, Ur, Fd, Ur A, Ur I, SrE
Range
0.0 to 50%
Range
1.00 to 99.99
Range
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Defaults Type
Auto RW
Defaults Type
Ur A RW
Defaults Type
3.0 RW
Defaults Type
RO
Defaults Type
0 RO
VFD66 User Guide
Issue Number: 2