Rockwell Automation SD3000 Drive Configuration, Programming - Manual (Page 86)

Appendix B
Continued
l FML_WCO% - Field Minor Loop Crossover Frequency
Default Current Value: 15
Low Limit: 0
High Limit: 75
Step: 1
The value in this variable selects the desired response of the field regulation loop. It is used by the field
current regulation algorithm running on the PMI Processor to keep the CEMF value constant when
operating above the base motor speed. It is scaled in radians per second. The higher the value, the more
quickly the drive responds to a change in field reference current. Also note that the higher the value, the
less stable the system response becomes
l FLD R% - Field Resistance
Default Current Value: 0
Low Limit: 0
High Limit: 32767
Step: 1
The value in this variable is the value of the shunt field resistance
(Rf.
It is scaled in ohms times 10. This
value can be generated automatically by commanding the field ID test in register 100/1 100.
l FLD TE% - Field Electrical Time Constant
Default Current Value: 0
Low Limit: 0
High Limit: 32767
Step:
1
The value in this variable is the electric time constant of the field. It is scaled in seconds times 1000 so that
a time constant of (Tf) of 0.1 seconds has a value of 100. The largest value that can be stored in this
variable is 32.767 seconds. This value can be generated automatically by commanding the field ID test in
register 100/1 100.
B-2