Siemens Module B3 ユーザーズマニュアル

 

 

 

 

 

 

 

   

 

 

 

 

T I A  Training Document 

Page 24 of 64 

  Module 

 

2.7.3.2 Integral Action Controllers (I- Controller) 
 

Integrating controllers are used to completely correct system deviations at every operating point.  As 

long as the system deviation is not equal to zero, the amount of the controller output changes. Only 

when the reference variable and the controlled variable are equal  -at the latest however, when the 

controller output reaches its system-dependent limit (Umax, Pmax etc.)- is the controller in a steady 

state. 

The mathematical formula for this integral action is: 

The controller output is proportional to the time integral of the system deviation: 

   with

 

 

How fast the controller output rises (or falls), depends on the system deviation and the integration 

time. 

 

 

 

 

 

 
Block Diagram 

 

 

 

 

 

 

 

 

 

 

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

B3 

Issued: 02/2008                                                                                                                                     Control Engineering with STEP 7