Siemens SIMATIC Manual page 12

Introduction
Function Blocks
The "Standard Library PID Control" contains two temperature controllers:
1. FB 58 "TCONT_CP":
Temperature controller for actuators with a continuous or pulsed input signal.
This controller block also includes a self-tuning function for the PI/PID
parameters.
2. FB 59 "TCONT_S":
Temperature step controller for actuators with an integral component such as a
positioning motor.
The control blocks are purely software controllers in which a block includes the
entire functionality of the controller. The data required for cyclic calculation are
stored in the corresponding instance data blocks.
Parameter Assignment User Interface
You set the parameters for the controller and tune it using the parameter
assignment user interface. The parameter settings are stored in the relevant
instance DB. You can start the parameter assignment user interface by double-
clicking on the relevant instance data block.
Online Help
You will find a description of the parameter assignment user interface and the
function blocks in the online help systems.
Opening the Readme File
The readme file contains the latest information on the software you have received.
You will find this file in the Windows Start menu.
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PID Temperature Control
A5E00125039-02