Field Flux Threshold; Flux Demand Invert; Speed Error Invert; Field Ir Compensation/Armature Ir Compensation - Emerson Mentor MP Advanced User's Manual

Parameter Keypad and
structure

Field Flux threshold

5.84
Bit SP
Coding
0 to 100 %
Range
75 %
Default
Background read
Update rate
Pr 5.84 sets the threshold at which the invert speed error flag is set. An internal lower limit of 50 % is applied.

Flux demand invert

5.85
Bit SP
Coding
1
0 to 1
Range
Background read
Update rate
When this parameter is set the flux demand is inverted.
5.86

Speed error invert

Bit SP
Coding
1
0 to 1
Range
Background read
Update rate
When this parameter is set the speed error is inverted.
Field IR compensation
5.87
Bit SP
Coding
0 to 100.0 %
Range
100.0 %
Default
Pr 21.36
Second motor
parameter
1 ms read
Update rate
This parameter is used to apply compensation for IR voltage drop in the field weakening voltage loop such that the EMF within the machine is
regulated rather than terminal voltage. The default value of 100.0 % provides full compensation. This parameter can be adjusted to apply less
compensation if required or not. If this parameter is adjusted then the set point for the field weakening voltage loop (Pr 5.59) may need adjusting also
to get the required armature voltage on the motor.
5.88 Armature IR compensation
Bit SP
Coding
±100.0 %
Range
100.0 %
Default
Pr 21.37
Second motor
parameter
1 ms read
Update rate
This parameter is used to apply compensation for IR voltage drop in the machine when the drive is being operated in estimated speed feedback. The
default value of 100 % provides full compensation. In some motors compensation windings are employed to correct for speed droop under load and
so 100 % compensation is not required. In these cases this parameter must be adjusted to apply the correct amount of compensation. Setting a
negative value will cause the speed to fall as load increases.
Mentor MP Advanced User Guide
Issue Number: 4
description format
Parameter
Parameter x.00
FI DE TE VM DP ND
1
FI DE TE VM DP ND
1
FI DE TE VM DP ND
1
FI DE TE VM DP ND
1
FI DE TE VM DP ND
1
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Advanced parameter
descriptions
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Serial comms
Performance
protocol
PS
1
PS
PS
PS
1
PS
Menu 5
95