User's Manual

Automation and Drives - SCE
T I A Training Document Page 40 of 64 Module
Starting Up the Software PID Controller (S)FB41 "CONT_C" with STEP 7
A SIMATIC S7-300 is programmed as a PID controller with the software STEP 7. This provides the
user with a uniform configuring tool for central as well as distributed configurations. Here, only the
most essential aspects can be pointed out. (Additional information is provided in the STEP7
reference manuals.)
The PID controller is parameterized with a special application included in STEP7 -Assigning
parameters to a PID Control- by resetting values there in an instance DB associated with the (S)FB
41. This is done as follows:
4.3 Exercise Example
The user has to perform the steps below in order to configure the hardware as well as to generate an
S7 program with the functionality of a PID controller, and then load it to a PLC:
1. Call the SIMATIC Manager
Click on symbol
'SIMATIC Manager’
Preface Fundamentals Discontinuous Action Controllerr Controller Block (S)FB41 Setting the System Appendix
2. Set up new project ( → File → New)
Click on 'New'
B3
Issued: 02/2008 Control Engineering with STEP 7