Communication C3F_T40354 192-121102 N04 June 20086.4 ProfibusIn this chapter you can read about:Typical application with fieldbus and IEC61131 ...............................................................354Profibus configuration.......................................................................................................354Cyclic process data channel.............................................................................................356Acyclic parameter channel ...............................................................................................357Simatic S7 -300/400 - modules ........................................................................................366The Profibus option is available with the Compax3 devices C3I20Txx!Notes on the configuration of the Profibus masterBefore configuring the Profibus master (e.g. S7), you will have to configure theCompax3 axis.In the Profibus window (see page 354)of the configuration wizard you will receivethe status message ”Profibus Telegram” with the information on the telegram whichcan be set in the master (PPO type).6.4.1. Typical application with fieldbus and IEC61131We recommend the following procedure to control the IEC61131-3 program viaProfibus: Use the control word (DeviceControl_Controlword_1) to control the PLCopenfunction modules (Execute, Enable) to activate the modules via Profibus. The logical module outputs can be placed on the status word(DeviceState_Statusword_1). Place the control word and the status word on the cyclic process data channel. Connect variable module outputs of your IEC61131-3 program with the recipearray. For rapid access, the values from the first 5 rows of the recipe array can beplaced in the cyclic channel. Additional values of the recipe array can be written acyclically.Now you can use the bus to assign values, to activate function modules with thecontrol word and to read the current status with the control word.6.4.2. Profibus configurationIn this chapter you can read about:Configuration of the process-data channel.......................................................................355PKW parameter channel ..................................................................................................356Error reaction to a bus failure ...........................................................................................356Following are described the input windows of the Profibus configuration wizard.Can be called up in the tree (Compax3 ServoManager, left window) under"configure configuration".I20 Function
