Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 57)

Configuring the Current Major Outer Control Loop 10-1
C
HAPTER
10
Configuring the Current
Major Outer Control Loop
The current major outer control loop uses the same RATELIM and PI control blocks as
the tension outer control loop.
The current major outer control loop includes the following sections:
• Gain profiler
• Tension-to-current scaling
• Tension PI input
• Tension PI limits
• Tension PI output
þ
To select the current major outer control loop ( OCL ):
▲
Set OCL SELECT (P.817) to CURRENT .
10.1 Gain Profiler for the Current Major Outer Control
Loop
The profiler block uses equations that are based on the dynamic physical properties of
the connected load to maximize system response and stability. Refer to figure A.19 in
Appendix A of the software manual (D2-3444).
Four inputs to the profiler block are calculated internally:
•
NORM FIELD REF (P.130) is the output of the field current regulator task.
•
NORM ROLL DIAMETER (P.131) is the output of the diameter calculator task.
•
INSTANTANEOUS INERTIA (P.230) is the calculated value of the dynamic load inertia as
provided by the inertia compensation task.
Use This Chapter for These Applications:
• Constant Diameter Current Regulator
• Variable Diameter Current Regulator
• Generic
Range: NONE , TENSION , CURRENT , POSITION P.817 =
&855(17