Introduction to

1
Introduction to
What is a fieldbus ? What are the fieldbus
benefits? Fieldbuses and the IEC61158 standard
PROFIBUS - overview Profiles DP Distributed
Peripherals PA Process Automation FMS
Fieldbus Message Specification
2
What is a fieldbus ?
I/O - system
Digital, 2 way communication
4 20 mA
Fieldbus
3
What are the fieldbus benefits?

• reduced cabling
• less hardware
• simpler configuration
• simpler maintenance
• reliability
• flexibility
• more information from process to business level

4
Fieldbuses and the IEC61158 standard
Automation
Business
Ethernet
Control
Ethernet
Ethernet
Profibus FMS
FF HSE
OCTOBUS IEC61158
P-Net
WorldFIP
Profibus
Device
Interbus
FF H1
ModBus
ControlNet
SwiftNet
DeviceNet
SDS
Profibus DP
LONworks
CAN
Bit-level sensor
Seriplex
Sensor loop
AS-i
Discrete
Process
Application
5
PROFIBUS - overview
6
Profiles
Communication Profiles
Ethernet
TCP/IP
FMS
DP PROFIBUS EN 50170
7
DP Distributed Peripherals
Master
PLC
PLC
- RS 485 - 9.6 kBit/s to 12 MBit/s
DP
Slave
Slave
Slave
Slave
8
DP - Example
PLC
Valve Node
Modular I/O
Operator Panel
9
PA Process Automation
Process Device Manager
H2
9.6kBit/s ? 12 MBit/s
PROFIBUS-DP

H1
PROFIBUS-PA
31.25 kBit/s
Segment Coupler / Link
10
PA - Example
Flow Transmitter
Level Transmitter
DP/PA Coupler
DP
11
FMS Fieldbus Message Specification
Master
PLC
PLS
FMS
- RS 485 - 9.6 kBit/s to 12 MBit/s
Master
Master
Slave
Slave
12
FMS - Example
SCADA PC with CITECT and PROFIBOARD
SIEMENS S300 PLC
Moeller PLC