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Automation and Drives - SCE 
 
 
 
 
 
T I A  Training Document 
Page 8 of 129 
  Module 
 
 
 
      F6 
Issued: 02/2008 
Operator Control with WinCC flexible 2005 
Preface Installation Project Description Step7 Project HMI Station WinCC flexible Project Messages Recipes User Management 
2. 
OPERATOR CONTROL WITH WINCC FLEXIBLE 
2.1 System 
Description 
Since processes are becoming more and more multi-layered and the demands on the functionality of 
machines and plants are increasing, the operator needs a high-performance tool for controlling and 
monitoring production plants. An HMI system (Human Machine Interface) represents the interface 
between a human being (the operator) and the process (machine/plant). The controller actually 
controls the process. That is, there are two interfaces: one between the operator and WinCC flexible 
(at the operator panel), and another interface between WinCC flexible and the controller.    
The WinCC flexible Engineering System is the software that is used to handle all required 
configuring tasks.  The WinCC flexible Edition determines which operator panels of the SIMATIC 
HMI spectrum can be configured. 
WinCC flexible Runtime is the software for process visualization. In runtime, the project is executed 
in the process mode. 
 
WinCC flexible performs the following tasks: 
 
• Displaying the process 
The process is mapped to the operator panel. If a status changes in the process, for example, the 
display at the operator panel is updated.  
• Operating the process 
The operator can operate the process by means of the graphic operator interface. For example, the 
operator can specify a setpoint for the controller, or start a motor. 
• Reading out messages 
If critical process states occur in the process, a message is triggered automatically; for example, if 
the specified limit is exceeded. 
• Archiving process values and messages 
The HMI system can archive messages and process values. In this way, you can document the 
process characteristics, and you can also access older production data later. 
• Documenting process values and messages  
The HMI system can read out messages and process values as protocol. Thus, you can have 
production data read out after the end of a shift, for example.   
• Managing process parameters and machine parameters 
The HMI system can store parameters for processes and machines in recipes. With one operational 
step, you can transfer these parameters from the operator panel to the controller, in order to change 
production to another product variant.