PROFIBUS DP-Master

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Table of Contents
1 Introduction..................................................................................................................................12
1.1 Abstract .................................................................................................................................... 12
1.2 Functional Overview................................................................................................................. 12
1.3 System Requirements .............................................................................................................. 12
1.4 Intended Audience ................................................................................................................... 12
1.5 Specifications ........................................................................................................................... 13
1.5.1 Technical Data ............................................................................................................................... 13
1.6 Terms, Abbreviations and Definitions ...................................................................................... 15
1.7 References ............................................................................................................................... 15
1.8 Legal Notes .............................................................................................................................. 16
1.8.1 Copyright........................................................................................................................................ 16
1.8.2 Important Notes.............................................................................................................................. 16
1.8.3 Exclusion of Liability....................................................................................................................... 17
1.8.4 Export............................................................................................................................................. 17
2 Fundamentals ..............................................................................................................................18
2.1 General Access Mechanisms on netX Systems ...................................................................... 18
2.2 Accessing the Protocol Stack by Programming the AP Task’s Queue.................................... 19
2.2.1 Getting the Receiver Task Handle of the Process Queue.............................................................. 19
2.2.2 Meaning of Source- and Destination-related Parameters .............................................................. 19
2.3 Accessing the Protocol Stack via the Dual Port Memory Interface.......................................... 20
2.3.1 Communication via Mailboxes ....................................................................................................... 20
2.3.2 Using Source and Destination Variables correctly ......................................................................... 21
2.3.3 Obtaining useful Information about the Communication Channel .................................................. 24
2.4 Client/Server Mechanism ......................................................................................................... 26
2.4.1 Application as Client....................................................................................................................... 26
2.4.2 Application as Server ..................................................................................................................... 27
3 Dual-Port-Memory........................................................................................................................28
3.1 Cyclic Data (Input/Output Data) ............................................................................................... 28
3.1.1 Input Data Image............................................................................................................................ 29
3.1.2 Process Data Output...................................................................................................................... 29
3.2 Acyclic Data (Mailboxes).......................................................................................................... 30
3.2.1 General Structure of Messages or Packets for Non-Cyclic Data Exchange................................... 31
3.2.2 Status & Error Codes ..................................................................................................................... 33
3.2.3 Differences between System and Channel Mailboxes ................................................................... 33
3.2.4 Send Mailbox ................................................................................................................................. 33
3.2.5 Receive Mailbox............................................................................................................................. 34
3.2.6 Channel Mailboxes (Details of Send and Receive Mailboxes) ....................................................... 34
3.3 Status ....................................................................................................................................... 35
3.3.1 Common Status ............................................................................................................................. 35
3.3.2 Extended Status............................................................................................................................. 43
3.4 Control Block ............................................................................................................................ 53
4 Getting started / Configuration ..................................................................................................54
4.1 Overview about Essential Functionality ................................................................................... 54
4.2 Configuration of Bus and Slave Parameters............................................................................ 55
4.2.1 Write Access to the Dual-Port Memory .......................................................................................... 55
4.2.2 Using the configuration tool SYCON.net ........................................................................................ 55
4.2.3 Detailed Description of Bus and Master Parameters...................................................................... 56
4.2.4 Detailed Description of Slave Parameters...................................................................................... 62
4.3 Task Structure of the PROFIBUS DP-Master Stack ................................................................ 69
4.3.1 Obtaining Diagnostic Information from connected Slaves by sending an
RCX_GET_SLAVE_CONN_INFO_REQ Packet .............................................................................................. 71
5 Overview.......................................................................................................................................73
5.1 Profibus DP and the OSI/ISO Layer Model.............................................................................. 73
5.2 Profibus DP Operation Modes (States).................................................................................... 74
5.3 Functionality of the FSPMM-Task (Layer 7)............................................................................. 75
5.3.1 Cyclic Data Transfer....................................................................................................................... 75
5.3.2 Acyclic Data Transfer ..................................................................................................................... 77
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010