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 Active Stations

Passive Stations (Field Devices)

PLCPC

PROFIBUS

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 All PROFIBUS services

High Speed Data Exchange

Peer to Peer 

Hazardous Area

  can be used together in one network

Therefore Communication is Transparent for

the User 

Same Cable and Components for High Speed

Data Exchange and Peer to Peer 

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High-Speed Data Exchange Features

Same priority for all field devices

Communication is permanent & cyclic

 Amount of data specified during configuration

Only one master can write to outputs (safety

aspect)

 Acyclic communication to field devices possible by

using extended functions (DP Extended/DPV1)

 Alarm acknowledgment

Up to 244 bytes input AND 244 bytes output data

per field device

Fastest fieldbus system (up to 12Mbaud)

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High-Speed Data Exchange - Startup Sequence

Power ON/Reset

Power ON/Reset of Master or Slave

Parameterization

Download of Parameters into the Field

Device (selected during Configurationby the User)

I/O Configuration

Download of I/O Configuration into the

Field Device (selected duringConfiguration by the User)

Data ExchangeCyclic Data Exchange (I/O Data)

and Field Device reports Diagnostics

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High-Speed Data Exchange - Parameterization

Master   Slave

Features Implemented in Device

Described in GSD File Processed by Configuration Tool

Selected at Configuration

Examples:

Enable Channel Diagnostic

Operation Range for Analog Channels

  (e.g. ±10V or 0..10V) Fail Safe Behavior (e.g. Hold Last

  Value)

Parameter Download (up to 244 bytes)

= Parameterization Data = Confirmation (Data Received)

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Parameterization (continued)

Parameter selection with Configuration Tool

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Fewer DIP Switches - NO Handheld - NO Extensive Addit ional Documentation

User defines every Function in ONE Tool.

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High-Speed Data Exchange - Configuration

Master

Configuration Download (up to 244 bytes)

= Configuration Data = Confirmation (Data Received)

Possible I/O Selections described in GSD File

Processed by Configuration Tool

Selected at Configuration

Examples

8DI (1 Byte), 8DO (1 Byte)

2AI (2 Words), 2AO (2 Words)

RS232 Interface, Counter Module

Slave

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Configuration Tool (continued)

I/O selection with Configuration Tool

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PROFIBUS Demo

  P a r a

 m e  t e r

  &   I / O  S

 e  l e c  t  i

 o n

  P a r a m

 e  t e r  &

   I / O  S e  l e c

  t  i o n

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High-Speed I/O - Data Exchange & Diagnostics

Master   Slave

= Output Data = Input Data

Master   Slave

Slave indicates diagnostics to report

Data Exchange (up to 244 bytes)

= Diagnostic Indicator 

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Data Exchange & Diagnostics (continued)

Master   Slave

= Diagnostic Request = Diagnostic Response

Master   Slave

Data Exchange (up to 244 bytes)

Diagnostic Request and Response (up to 244 bytes)

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Diagnostic Response (continued)

6 Bytes

Mandatory

Header  Header  Header 

Device

Related

(Optional)

Identifier

Related

(Optional)

Channel

Related

(Optional)

Up to 244 Bytes

 e. g.  w r o n g

 c o n f i g u r a t i o n

 e. g.  n o  l o a d

 p o w e r

 e. g.  m o d u l e  # 4

 h a s  d i a g n o s t i c

 e. g.  w i r e  b r e a k  o r

 s h o r t  c i r c u i t

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High-Speed Data Exchange - Fail Safe

What happens if my bus fails:

valve open, valve closed,

valve 1/2 open…???

 O p t i o n a l  f e a t u r e  F a i l  S a f e  s p e c i f i e s  b e h a v i o r  o f 

 O u t p u t s  i n  c a s e  o f  C o m m u n i c a t i o n  L o s s

 O p t i o n a l  f e a t u r e  F a i l  S a f e  s p e c i f i e s  b e h a v i o r  o f 

 O u t p u t s  i n  c a

 s e  o f  C o m m u n i c a t i o n  L o s s

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Fail Safe (continued)

Optional Feature for Field Devices

Defined in Electronic Device Data Sheet

Manufacturer has the capabili ty to allow the End

User to specify the action on loss of communication

Hold outputs at the last value received (e.g. valve 1/2 open)

Set outputs to a specified value (e.g. open or close valve

completely)

User defines action during Parameterization

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Fail Safe (continued)

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PROFIBUS Demo

  D  i a g

 n o s  t  i

 c s  &   F a  i  l

  S a  f e

  D  i a g

 n o s  t  i

 c s  &   F a

  i  l  S a  f e

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High-Speed Data Exchange Timing

10 Stations With 2 Byte I/O (160 In/Output Signals)

Bus Cycle Time 0.8ms

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High-Speed Data Exchange Timing

10 Stations With 128 byte I/O (10,240 In/ Output Signals)

Bus Cycle Time 2.0ms

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High-Speed Data Exchange Timing

Typical Cycle Time - Each Station With 2 Byte I/O

0.3   0.5

2.1

8.8

2.0

20.5

1.50.8

3.3

2.00.9

6.14.6

7.7

14.1

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

1 5 10 20 30   [Number of 

Slaves]

     [    m    s     ]

12MBaud

1.5MBaud

500kBaud

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PROFIBUS Summary

Extensive Parameterization Features

Extensive Diagnostic Features

Fail-Safe Behavior

Deterministic

Fast (Up to 12 MBaud)

Safe and Reliable

Easy Configuration

Capabilities for Complete Plant Solution from

Cell to Bit Level