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Automation and Drives - SCE

T I A Training Document Page 12 of 64 Module

2.4 Step Function for Examining Controlled Systems

To examine the behavior of controlled systems, controllers and control loops, a uniform function is

used for the input signal: the step function. Depending on whether a control loop element or the

entire control loop is examined, the step function can be assigned to the following: the controlled

variable x(t), the manipulated variable y(t), the reference variable w(t) or the disturbance variable

z(t). For that reason, the input signal, the step function, is often designated as xe(t), and the output

signal as xa(t).

for

Preface Fundamentals Discontinuous Action Controller Controller Block (S)FB41 Setting the System Appendix

Issued: 02/2008 Control Engineering with STEP 7