Emerson FXMP25 User Manual page 34

26
Coding
Range
Default
Update rate
Set the hysteresis from the level set in Pr 25 to eliminate relay bounce when the level is
reached. If the value is greater or equal to the threshold Pr 25 plus half the hysteresis
band Pr 26 the output becomes active, or if the value is less than the threshold minus
half the hysteresis the output becomes inactive.
27
Coding
Range
Update rate
When set to On (1) indicates the value of flux is above threshold levels set by Pr 25 and
Pr 26.
29
Coding
Range
Default
Update rate
See Pr 30 for description.
30
Coding
Range
Default
Update rate
When the motor is operating in the field weakening voltage loop region the relationship
between the field current and the level of flux can be non linear. The field controller can
include the effects of this non linearity by representing the field current to flux
characteristic as a series of three lines as shown in the figure overleaf.
34
FXMP25 OK hysteresis level
Bit FI Txt
0.0 to 25.0 %
0.0 %
16 ms
Flux threshold level exceeded
Bit FI Txt
1
OFF (0) or On (1)
16 ms
Motor saturation breakpoint 1
Bit FI Txt
0 to 100 % of rated flux
50
Background read
Motor saturation breakpoint 2
Bit FI Txt
0 to 100 % of rated flux
75
Background read
www.controltechniques.com
VM DP ND US
1
VM DP ND US
1
VM DP ND US
VM DP ND US
RW BU PS
1 1 1
RW BU PS
RW BU PS
1 1 1
RW BU PS
1 1 1
FXMP25 User Guide
Issue Number: 3