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Proportional-plus-integral (pi) action – Rockwell Automation T6200 Compressor Anti-Surge and Capacity Controller User Manual

Page 111

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Control Primer

7-9

Proportional-Plus-Integral (PI) Action


Adding proportional and integral action in the same controller eliminates the offset of the
proportional action and improves the response time compared to just the integral action along.

Figure 7-5

Derivative (D)
Control Action