Siemens Module B3 Manuale Utente
Automation and Drives - SCE
T I A Training Document
Page 15 of 64
Module
2.5.3 Proportional Controlled System with Two Time Delays
The controlled system is called P-T2 system for short.
Figure: Jump Response of the P-T2 system
Tu: Delay time Tg: Transition time
The system consists of the reaction-free series connection of two P-T1 systems that have the time
constants TS1 and TS2.
Controllability of P-Tn systems:
Can still be
controlled
controlled
Difficult to contro
l
Easy to
control
control
With the rising ratio Tu/Tg, controlling the system becomes more and more difficult.
Preface Fundamentals Discontinuous Action Controller Controller Block (S)FB41 Setting the System Appendix
B3
Issued: 02/2008 Control Engineering with STEP 7