Rockwell Automation 1756-DMF30 ControlLogix Drive Module - Manual (Page 152)

Publication 1756-UM522B-EN-P - February 2003
B-72 1756-DMD30 Specific Information
350 Current Actl Ref
Displays the value of motor current reference that is present at
the output of the divide by flux calculation. Units:
Default:
Min:
Max:
Type:
File:
Group: P.U.
0
-8
8
Non-Linkable, Read Only, Floating Point
Torque Control
Current
351 Current Ref Trim
Provides an external source to command, trim or offset the
internal motor current reference. This value is summed with
parameter 351 [Current Actl Ref] before the current limit is
applied. Scaling is in per unit motor current. Units:
Default:
Min:
Max:
Type:
File:
Group: P.U.
0
-8
8
Linkable, Read-Write, Floating Point
Torque Control
Current
354 Curr Rate Limit
The maximum rate of change for Current Reference, in per unit
current/ sec. Parameter 90 [Spd Reg BW] will be limited to 2/3
of this value. Units:
Default:
Min:
Max:
Type:
File:
Group: /Sec
50
10
2000
Linkable, Read-Write, Floating Point
Torque Control
Current
355 Curr RateLimited
The current reference output of the rate limiter. Units:
Default:
Min:
Max:
Type:
File:
Group: P.U.
0
-8
8
Non-Linkable, Read Only, Floating Point
Torque Control
Current
360 Min Flux
Sets the smallest level of flux used to convert parameter 303
[Motor Torque Ref] to a current reference above base speed. Units:
Default:
Min:
Max:
Type:
File:
Group: P.U.
1
0.1
1
Linkable, Read-Write, Floating Point
Torque Control
Current
361 Flux LpassFlt BW
Sets bandwidth of filter which adjusts the response of the flux
estimate used in the torque to current conversion. Since the
field time constant varies between motors a better control
response may be obtained by adjusting the filter time constant.
Normally this parameter is not changed unless a significant
disturbance occurs as the motor enters field weakening AND
parameter 360 [Min Flux] is less than 1 per unit. Units:
Default:
Min:
Max:
Type:
File:
Group: R/S
20
0.5
100
Linkable, Read-Write, Floating Point
Torque Control
Current
362 Motor Flux
The motor flux value used to calculate motor current reference
from parameter 303 [Motor Torque Ref]. For operation above
base speed, this value should be linked to the output of a flux
curve in the ControlLogix controller. A value of 1.0 represents
rated motor flux. Units:
Default:
Min:
Max:
Type:
File:
Group: P.U.
1
-8
8
Linkable, Read-Write, Floating Point
Torque Control
Current
No. Name
Description Values