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1、Chapter 2 Date 11/04/99, page 1 PROFIBUS DP PROFIBUS DP the fastest field bus system Chapter 2 Date 11/04/99, page 2 DP Details ? class 1 master - ? central controller which exchanges data with the connected I/O devices (slaves) ? determines the baudrate ? handles the Token ? several class1 masters
2、are permitted, typical devices are PLC, PC ? class 2 master - ? diagnostic and startup tool, typically a configuration tool ? can control one slave at a time ? slave station - ? passive station which acknowledges messages or answers per request Chapter 2 Date 11/04/99, page 3 DP Details ? master- ma
3、ster, master- slave communication Class 1 MasterClass 2 Master Slave Reading Diagnosis Parameter Assignment Configuring Data Exchange Reading Diagnosis Parameter Assignment Configuring Address Change Reading Configuration Reading I/O Controlling of one Slave Reading Slave Diagnosis, Upload, Download
4、 Activating Bus Parameter. Download, Activating/,Deact. Slaves, Operating Mode a device can consist of multiple functions, e.g class1 and class2, class1 and slave Chapter 2 Date 11/04/99, page 4 DP Details ? A device can consist of multiple functions, e.g. class1 and class2, class1 and slave, which
5、allows: ? a simple master master communication via the master - slave combination ? whenever one master has the token the other PLC can be a slave to this master PLCPLC PLC1 - master and slave PLC2 - master and slave Chapter 2 Date 11/04/99, page 5 DP Details ? Master - Master communication by using
6、 a DP-DP gateway ? combination of two mono master systems ? simple data exchange between the two masters up to 244 byte PLCPLC Chapter 2 Date 11/04/99, page 6 Interoperability ? Open Configuration permits Plug and Play PROFIBUS configuration tool System configuration Electronic Device Data Sheets (G
7、SD-file) PLC PROFIBUS GSDGSDGSDGSDGSDGSD Chapter 2 Date 11/04/99, page 7 Device Description ? GSD file ? each slave or master class 1 device on PROFIBUS DP needs to have a device description file, the characteristic of each PROFIBUS-DP device is described in the GSD-File ? the GSD-file contains all
8、device specific parameters e.g.: ? Supported Baudrate ? Supported Message Length ? Number of input / output data ? Meaning of diagnostic messages ? Options for modular devices e.g. which are available ? text file (ASCII-format) ? each configuration tool relates to the GSD information Chapter 2 Date
9、11/04/99, page 8 Device Description ? GSD-Files are created by the device vendors ? the PROFIBUS Trade Organization provides an GSD-Editor which makes it very easy to create GSD-Files ? the GSD-Editor contains a GSD-Checker which guarantees the conformance of the GSD-Files to the PROFIBUS standard ?
10、 a library of GSD-Files is provided at the PROFIBUS web page: http:/ Chapter 2 Date 11/04/99, page 9 Device Description # P ro fib u s _ D P(M ) :(O ) P rm T e x t = E n d P rm T E x t ;(O ) E x tU s e rP rm D a ta = . E n d E x tU s e rP rm D a ta ;(M ) G S D _ R e v is io n = 1 V e n d o r_ N a m
11、e = . ;S la v e s p e c ific d a ta(M ) F re e z e _ m o d e _ s u p p o rte d = ;U s e r_ P rm _ d a ta . ;U n it_ d ia g n o s tic ; Extuserprmdata=1 “Diagnostics Alarm“ Bit(5) 1 0-1 Prm_Text_Ref=1 Endextuserprmdata ; Userprmdata: Length and Preset: Max_User_Prm_Data_Len=171 Ext_User_Prm_Data_Cons
12、t(0)= 0x40,0x20,0x00 Ext_User_Prm_Data_Ref(1)=1 Chapter 2 Date 11/04/99, page 29 Parameterization Chapter 2 Date 11/04/99, page 30 Parameterization GSD Information ?GSD file parameterization information ?only module related information PrmText=9 Text(0)=“Deactivated“ Text(34)=“Current020 mA“ Text(35
13、)=“Current420 mA“ EndPrmText ExtUserPrmData=207 “Out:type/range channel 0“ BitArea(0-7) 35 000-035 Prm_Text_Ref=9 EndExtUserPrmData Module=“6ES7 332-5RD00-0AB02AO“ 0x83,0x41,0x00,0x25,0xD8 Ext_Module_Prm_Data_Len=21 Ext_User_Prm_Data_Const(0)= 0x15,0x5F,0x04,0x00,0x10,0x00,0x00,0x00,0x00,0x23,0x23,0
14、x23,0x23,0xE5,0x00, 0x00,0x00,0x00,0x00,0x00,0x00 Ext_User_Prm_Data_Ref(9)=207 EndModule Chapter 2 Date 11/04/99, page 31 Parameterization Chapter 2 Date 11/04/99, page 32 Parameterization ? conventional way analog channels analog device DIP switches to determine the function per channel jsdfehrgihw
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