PROFIBUS
Design and
Good Practices
Webpage
Agenda
PROFIBUS
Family
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
www.profibus.com.sg
PROFIBUS Family
3
ERP
MES
Ethernet
backbone
Agenda
PROFIBUS
Family
DCS
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
1
2
3
PROFIBUS PA
4
PROFIBUS DP
5
6
7
8
…
31
3
PROFIBUS PA
4
PA coupler
PA link
5
6
Author / Title of the presentation
1
2
7
8
…
31
PROFIBUS Family - Principle
4
Agenda
To create hierarchy in the network, PROFIBUS defines 2
types of stations: active (masters) and passive (slaves).
PROFIBUS
Family
Communication
Medias
Topologies
Cable length
master
0 1 0 1 0
commands
responses
slave
0 1 0 1 0
Devices Rules
Installation
Rules
network
Troubleshooting
Training
 At least 1 master is mandatory.
 PROFIBUS networks allow multiple masters.
 In total 127 stations can be addressed (masters +
slaves).
Dominique Chabauty / PROFIBUS Design and good practices
Communication Medias
5
PROFIBUS Supports 3 transmission media
Agenda
PROFIBUS
Family
Communication
Medias
RS 485
2-wire CU-cable for
general purposes
Topologies
Fiber Optic
Highest EMC protection
and wide distances
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Coupler
MBP-IS
2-wire CU-cable with the option for
power over the bus and Ex-protection
Dominique Chabauty / PROFIBUS Design and good practices
Coupler
Fiber optic cable
Total Overview of the Technology
6
Installation
Rules
Common Application Profiles (optional):
App.
Profiles I
PROFIsafe, Time Stamp, Redundancy, etc.
Training
Comm.
IEC
61158/61784
Physical
Layer
RS 485
RS 485-IS
NRZ
Intrinsic Safety
PROFIBUS DP
Fiber
Optics:
Glass Multi Mode
Glass Single Mode
PCF / Plastic Fiber
Dominique Chabauty / PROFIBUS Design and good practices
MBP
MBP-LP
MBP-IS
FDL + DPV0...V2
Manchester Bus Powered
Low Power
Intrinsic Safety
Descriptions (GSD, EDD)
Tools (DTM, Configurators)
Troubleshooting
Integration
Technologies
Devices Rules
Weighing & Dosage
Identification Systems
V2.0 and V3.0
Cable length
PROFIdrive
Topologies
SEMI
App.
Profiles II
RIO for PA
Communication
Medias
PA Devices
PROFIBUS
Family
Encoder
Agenda
PROFIBUS DP Topologies - General
7
PROFIBUS communicates over a two wire bus structure.
Agenda
PROFIBUS
Family
sending
listen,
taking over and
answering
listen
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
9
0 1 0 1 0
1
117
T
T
43
5
listen
listen
Devices are addressed through a network address (0..126).
Devices are coupled in parallel to the bus.
Devices can be hot swapped and position does not matter.
Each segment is terminated at both end with an active termination
Spurs should be avoided as length is very limited
Dominique Chabauty / PROFIBUS Design and good practices
PROFIBUS DP Topologies - Repeaters
8
Single Repeaters
PROFIBUS Hubs
Agenda
Communication
Medias
Topologies
Cable length
Segment 1
PROFIBUS
Family
Stations
Devices Rules
Backbone
Installation
Rules
Training
Segment 2
Troubleshooting
Stations
Segment 1
Segment 2
Benefit: Isolate part of your network from EMC/Noise
Dominique Chabauty / PROFIBUS Design and good practices
PROFIBUS DP Topologies – Fiber Optic
9
Classic Topology
Ring Topology
Agenda
PROFIBUS
Family
Communication
Medias
Fiber optic
cable
Coupler
Coupler
Topologies
Cable length
Devices Rules
Coupler
Installation
Rules
Coupler
Fiber optic cable
Troubleshooting
Training
Coupler
Coupler
Benefits: Long distances and EMC/Noise isolation
Dominique Chabauty / PROFIBUS Design and good practices
PROFIBUS DP Topologies - Wireless
10
Connect your slaves through wireless couplers
Agenda
PROFIBUS
Family
Communication
Medias
Wireless
gateway
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Wireless
gateway
Training
Wireless
gateway
Wireless
gateway
Segment
Dominique Chabauty / PROFIBUS Design and good practices
Wireless DP
Device
Wireless PN
Device
PROFIBUS DP Topologies - Redundancy
11
Agenda
PROFIBUS
Family
Communication
Medias
RS 485
Topologies
RS 485
Cable length
RS 485
coupler
coupler
Devices Rules
Installation
Rules
RS 485
Troubleshooting
RS 485
Training
glasvezel
coupler
coupler
glasvezel
RS 485
1.0
RS 485
PROFIBUS PA Topologies - Overview
12
Agenda
PROFIBUS
Family
Communication
Medias
+
εx
DCS/PLC
Topologies
Cable length
Devices Rules
Installation
Rules
PROFIBUS DP
Troubleshooting
Junction Box
DP/PA-Link
Training
Segment
24 V
PROFIBUS PA
Dominique Chabauty / PROFIBUS Design and good practices
“T“
PROFIBUS PA Topologies - Redundancy
13
Agenda
PROFIBUS
Family
Communication
Medias
PROFIBUS DP
Coupler Redundancy
 Coupler-Redundancy
DP/PA-coupler,
redundant (M = master)
M
IM 153, redundant
AFS
Topologies
PROFIBUS PA
Cable length
Bus termination
Devices Rules
Automatic bus termination
Troubleshooting
Training
PA Ring Redundancy
PROFIBUS DP
Installation
Rules
Active Field Splitter
 Coupler-Redundancy
M
M
DP/PA-coupler,
redundant (M = Master)
 Media redundancy based on a ring topology
AFD
AFD
Active Field Distributor
IM 153, redundant
PROFIBUS PA
AFD
Dominique Chabauty / PROFIBUS Design and good practices
AFD
Transmission speed (baudrate)
14
Agenda
PROFIBUS offers the user the possibility to choose
from 10 transmission speeds (RS 485).
PROFIBUS
Family
Communication
Medias
9,6
19,2
45,45
93,75
187,5
500
1500
3000
6000
12000 kbps
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Remarks:
The transmission speed determines the maximum cable
length and vice versa.
The transmission speed has to be set identically at all
the masters on the same bus.
Most slaves detect the baudrate automatically.
Because of economic and technical reasons some
products do not support all transmission speeds.
Some older products do not support 45,45 kbps.
2.1
PROFIBUS DP – Cable Length
15
Baudrate vs Cable Length
Agenda
Baudrate
(kbit/s)
9.6
19.2
45.45
93.75
187.5
500
1500
3000
6000
12000
Communication
Medias
Segment length
(m)
1200
1200
1200
1200
1000
400
200
100
100
100
Topologies
Segment length
(feet)
3940
3940
3940
3940
3280
1310
656
328
328
328
PROFIBUS
Family
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
3 baudrate transitions in which the cable
length reduces with more than 50 %.
These lengths are defined for 1 segment with
32 bus loads!
2.1
Device Rules - Network
16
PROFIBUS Address Map
Agenda
PROFIBUS
Family
Communication
Medias
0
Service-, diagnosis- and programming tool
1..2
Masters (class 1)
3..125
Slaves (total 123 or 124)
126
Address for: “Set Slave Address”
127
Broadcast address
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Most configuration tools block address 0 and 126 for slaves.
Address 126 is a default address for slaves with software
address settings.
Address 127 is a broadcast address (only visible with a
busmonitor).
Maximum 124 DP slaves per bus!!!!!!!
2.0
Device Rules - DP Segments
17
Maximum 32 loads per RS485 segments
Agenda
PROFIBUS
Family
Max 30 Stations
Max 31 Stations
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Segment 1
Segment 2
Devices that generate new segments:
Repeaters
Fiber Optic Couplers
Wireless gateways
After these devices, PROFIBUS segment
rules are the same.
Dominique Chabauty / PROFIBUS Design and good practices
Installation rules
18
Grounding & Shielding
Agenda
PROFIBUS
Family
PROFIBUS is digital communication, not 4-20mA
Ground at both end
Ungrounded shield has no effect
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Dominique Chabauty / PROFIBUS Design and good practices
Installation rules
19
Power Lines
Agenda
PROFIBUS
Family
Digital communication is sensitive to power lines
Watch out for cable runs in trays
Respect distances for air separation
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Power line too close
Power line are removed
Dominique Chabauty / PROFIBUS Design and good practices
Installation rules
20
Some examples with Power Lines
Agenda
PROFIBUS
Family
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Dominique Chabauty / PROFIBUS Design and good practices
Installation rules
21
Proper wiring and component selection
Agenda
PROFIBUS
Family
Wiring and cable termination is critical
Wrong component selection leads to bad installation
Take environment in account (humidity, sunlight…)
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Dominique Chabauty / PROFIBUS Design and good practices
Troubleshooting
22
Recognizing bad installations
Agenda
PROFIBUS
Family
You cannot use the multimeter, this is digital comm.
Specific tools are required
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Cable Tester
Oscilloscope
Troubleshooting
Training
Analyzer
Find wiring errors such as short circuit
Identify missing termination and EMC
Capture error messages and find the source of your
system shutdown
Cost and time saving by using the right tools!
Dominique Chabauty / PROFIBUS Design and good practices
Troubleshooting - Oscilloscope
23
Good signal
Agenda
PROFIBUS
Family
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Missing termination
Training
Dominique Chabauty / PROFIBUS Design and good practices
Troubleshooting - Analyzer
24
Capture all PROFIBUS messages
Agenda
PROFIBUS
Family
Useful for random errors
Shows underlying conditions
Device diagnostic
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Dominique Chabauty / PROFIBUS Design and good practices
Training
25
Certified Training by PROFIBUS International
Agenda
PROFIBUS
Family
Communication
Medias
Topologies
Cable length
Devices Rules
Installation
Rules
Troubleshooting
Training
Benefits
Avoid basic errors that cost time and money
Quality assurance for design and
commissioning
Faster project delivery
Better installation, longer operation
Various courses available
PROFIBUS Certified Engineer
PROFIBUS Certified PA Module
PROFIBUS Certified Installer
PROFINET Certified Engineer
Dominique Chabauty / PROFIBUS Design and good practices
Certified by
26
The end
Thank you for listening
Dominique Chabauty / PROFIBUS Design and good practices