Emerson FXMP25 - Page 38

38 FXMP25 User Guide
www.controltechniques.com Issue Number: 3
In standalone mode, if the field controller is to be used in flux mode Pr 64 = On (1), this
parameter would become the external flux reference of the field control loop.
When Pr 64 = 0FF (0), this is the reference selected when terminal
Ion is open.
Programmable value of the maximum flux demand of the field weakening voltage loop.
The maximum value of this parameter depends upon the setting of the rated current
Pr 70.
MAX_FIELD_FLUX = 100 x 25 / Pr 70. For values of Pr 70 less than 20.8 A the
MAX_FIELD_FLUX will be limited to 120 %.
Maximum voltage demand when field voltage mode is selected Pr 75 = On (1).
The minimum value of flux demand to prevent excessive field weakening, and hence
over speeding. Minimum voltage demand when field voltage mode is selected Pr 75 =
On (1).
This parameter will be set to the field current of the motor and will define the 100 % point
for the field controller.
67 Field economy level
Coding
Bit FI Txt VM DP ND US RW BU PS
1111
Range 0.0 to 100 %
Default 25.0 %
Update rate Background read
68 Maximum flux / voltage limit
Coding
Bit FI Txt VM DP ND US RW BU PS
11 11 1
Range 0 to MAX_FIELD_FLUX
Default 100.0 %
Update rate Background read
69 Minimum flux / voltage limit
Coding
Bit FI Txt VM DP ND US RW BU PS
11 11 1
Range 0.0 to MAX_FIELD_FLUX
Default 50.0 %
Update rate Background read
70 Rated field current
Coding
Bit FI Txt VM DP ND US RW BU PS
2111
Range 0.00 to 25.00A
Default Eur: 5.00, USA: 25.00
Update rate Background read