Self-Tuning Temperature Controller; Introduction - Siemens SIMATIC S5 Manual

Description of the Firmware

1.2 Self-Tuning Temperature Controller

1.2.1 Introduction

When correctly tuned, PID controllers achieve good control results with a wide variety of thermal
processes. However, the selection of the control parameters can be relatively time-consuming.
The self-tuning function implemented in the temperature controller module (EPROM) executes an
automatic process identification during the heating procedure and determines the optimum
controller parameters.
The self-tuning is suitable for slow changing processes with connected heating control loops as
found, for example, in plastic processing. The controller self-tuning function is particularly
advantageous when the controlled system reacts differently at different operating points in the
process, since the controller parameters for the particular operating point can be optimized.
Fig. 1.2.1/1 Structure of the temperature controller with self-tuning function
4–16
IP244
C79000–B8576–C860–02