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The PROFIBUS protocolspWiring Installation, DP- and PA-nodesInstallation, DP and PA nodes Data representation on the busExchange of data, master / slaveExchange of data, master / slaveCycle time, DP Mono-master-systemConfigurationConfigurationGSD : Electronic data sheet

Oslo University College

The PROFIBUS protocolsThe PROFIBUS protocols

DP PAFMS

ayer

DP PAFMS

User

La

DP-Functions

Application Profiles

Application(7)

Fieldbus MessageSpecification (FMS)

DP-Functions

(3)-(6)

Data Link(2)

not used

IEC Interface*Fieldbus Data Link (FDL)( )

Physical(1) IEC 61158-2

PROFIBUS guidelines

RS-485 / Fiberoptikk

EN 50 170 DIN E 19245 partl 4


WiringWiring

2 wiresshield


Pin assignementPin assignement

Pin no Signal DescriptionPin no Signal Description3 RxD/TxD-P Data line B + (red wire)

5 DGND Signal Ground

6 VP Power for termination (P5V)

8 RxD/TxD-N Data line A - (green wire)


Termination RS485Termination, RS485

Station 1 Station 2

390 Ω

VP (6)

RxD/TxD-P (3)

DGND (5)

(3) RxD/TxD-P

(5) DGND

390 ΩData line B

RxD/TxD-P (3)

( )

VP (6)

RxD/TxD-N (8)

( )

(6) VP

(8) RxD/TxD-NData line A

220 Ω

RxD/TxD-N (8)

Shield

DGND (5)

390 Ω


Installation DP-nodesInstallation, DP-nodes

VP

First stationBus termination

Last stationBus termination

VPVP

B390 Ω

VP

BData line B

390 Ω

A

220 Ω

390 ΩA

Data line A220 Ω

390 Ω

DGND DGND

B BA A

Station 2 Station 3

BA BA


Station 2 Station 3

Installation PA-nodesInstallation, PA-nodes

Bus BusBus termination

Bus termination

Power Supply

100Ω 100Ω

Supply1 μF1 μF

Max 32 ……PA-stations


Th ll t d t kThe smallest data package

The OCTET

2Idle

1. octet

LSB MSB

2. octet

LSB

Start 1 2 3 4 5 6 7 8 Parity Stop StartBit sequense:

LSB MSB LSB


D t t tiData representationIEC – 6 1158-2

1 0 1 01 1

I0+9mA

I0

I0-9mA

tbit 1 bit 2 bit 4 bit 6bit 3 bit 5


Stations repeaters andStations, repeaters and segments

Termination

Termination

RepeaterStation 1

2 3 30 311

Termination

Repeater

62 61 33 32


Token ringToken ring

Aktive stations, MASTERS

Logical token ring

PLCPLC PC

PROFIBUS

Passive stations , SLAVES


Exchange of data master/slaveExchange of data, master/slave

Slav

e

ster

Slave Master

DP-

S

DP-

MaSlave Master

ver

DP-

Slav

DP-

Mas

ter

Master SlaveD


The 3 most common PROFIBUS telegramsThe 3 most common PROFIBUS telegrams

1.) Token PassingSDx = Start Delimiter xDA = Destination Address) gSA = Source Address

FC = Function Code

SD4 DA SA

2 ) FDL Status Request Telegram

FC Function CodeFCS = Frame Check SequenceED = End Delimiter

2.) FDL Status Request TelegramLE = LengthLEr = Repeated LengthDSAP D ti ti S i A P i t

SD1 DA SA FC FCS ED

3.) Data Telegram

DSAP = Destination Service Access PointSSAP = Source Service Access PointDU = Data Unit3.) Data Telegram

SD2 LE LEr SD2 DA SA FC DSAP SSAP DU FCS ED

T lHead


TaleHead

Data transmission at 1.5 MBaudTbit t i i ti 1 bit 0 6667Tbit = transmission time, 1 bit = 0.6667μsOCTET : 11 Tbit = 7.3 μs

Token Passing : 33 Tbit = 22 μs

Status / Request : 66 Tbit = 44 μs

Data : Head (9 octets) + Tale (2 octets) + Data (n octets)2 bytes of data : 13 x 11 Tbit = 143 Tbit = 95.3 μs

” Idle time ” for master : typical 75 Tbit = 50 μs” Station delay time ” for slave : typical 11 Tbit = 7.3 μs

y μ

Total, 2 bytes of data : (33+66+143+75+11)Tbit = 0.219 ms


C l ti DP M t tCycle time, DP Mono-master-system

B l ti

Each Slave : 2 bytes in / 2 bytes out

Bus cycle time[ms]

00 kBi /500 kBit/s

1.5 MBit/s

12 MBit/s

Number of Slaves


ConfigurationConfigurationPROFIBUS

Configuration SoftwareConfiguration Software

Electronic Data Sheet (GSD - files)

PLC

GSD GSD

PLC

PROFIBUS

GSD GSD GSD GSD GSD GSD


GSD-file (WINblock station)GSD-file (WINblock station)

; WIWB0250 GSD; WIWB0250.GSD ; Geraetestammdatei fuer PROFIBUS DP WINbloc 8 DI P ; Art.No. 827516 ; Weidmueller GmbH + Co, Postfach 2807, 33058Paderborn ; Serviceline 05252 960-555, Fax 05252 960116 ; Mailbox GSD, Siemens Typdateien: 05231 141555; Name:Gast kein Password ; ; Version: 1 6 Stand: 10 6 97 Km; Version: 1.6 Stand: 10.6.97 Km ;================================;#Profibus_DPGSD_Revision = 1Vendor_Name = "Weidmueller Interface"Model_Name = "WINbloc 8DI"Revision = "V1 6"Revision V1.6Ident_Number = 0x250;


Protocol_Ident = 0Station Type = 0

GSD-filecont

Station_Type 0FMS_supp = 0Hardware_Release = "Ver.4"Software_Release = "00"cont. ;9.6_supp = 119.2_supp = 1O s vO.s.v12M_supp = 1;MaxTsdr_9.6 = 60MaxTsdr_19.2 = 60O.s.vMaxTsdr_12M = 800;;Redundancy = 0Repeater_Ctrl_Sig = 224V_Pins = 0;Implementation_Type = "LSPM2"Bitmap_Device = "winblocn"Bitmap Diag = "winblocs"


Bitmap_Diag winblocs;

GSD-file contGSD-file cont.; Slavespezifische Werte;;OrderNumber = "827516"Periphery = "WINbloc"Freeze_Mode_supp = 1_ _ ppSync_Mode_supp = 1Auto_Baud_supp = 1Set_Slave_Add_supp = 0Min Slave Intervall = 1Min_Slave_Intervall = 1Modular_Station = 0Modul_Offset = 0Fail_Safe = 0Slave_Family = 3@TdF@WINbloc;Max_Diag_Data_Len = 13User Prm Data Len = 0x05User_Prm_Data_Len = 0x05User_Prm_Data = 0x00,0x00,0x00,0x00,0x00Module = "DP-Kompaktgeraet 8 I" 0x00,0x10EndModule


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