Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 69)

Configuring the Tension Outer Control Loop 12-1
C
HAPTER
12
Configuring the Tension
Outer Control Loop
The tension outer control loop regulator uses the same RATELIM and PI control blocks
as the current major outer control loop.
The tension output control loop includes:
• Tension PI input
• Tension PI limits
• Tension PI output
þ
To select the tension outer control loop:
▲ Set OCL SELECT (P.817) to TENSION .
12.1 The Tension PI Input
Refer to figure A.18 in Appendix A of the software manual (D2-3444) as you configure
the tension
PI input.
The input to the PI block is the rate-limited value of TENSION DEMAND (P.844), which is
the input to RATELIM block. The output is TEN RAMP OUTPUT (P.842).
þ
To configure the PI block input:
▲ Set TEN RAMP TIME (P.833) to specify the reference rate of change.
▲ Connect the analog tension feedback signal to terminals 52(+) and 53(-) on
the I/O Expansion board.
The standard PI block feedback is an analog signal proportional to tension;
therefore, it is assumed that the tension transducer output has been amplified
(if necessary) and conditioned to provide a 0 to 10 volt
DC signal linear from 0
to maximum tension.
Use This Chapter for These Applications:
• Constant Diameter Tension Regulator
• Variable Diameter Tension Regulator
• Generic
Range: NONE , TENSION , CURRENT , POSITION P.817 =
7(16,21
Range: 0.1 to 60.0 SECONDS P.833 = SECONDS