4. Engineering principles and guidelines
Profibus in Process 2013
Profibus DP
RS 485
Profibus PA
MBP
Max. 1900 m
UBUS = 24 V
I BUS = < 400 mA
Profibus DP
RS 485
Profibus PA
MBP-IS
Max. 1000 m
UBUS = 13,5 V
I BUS = < 110 mA
for ia / ib IIC
5. Engineering principles and guidelines
Profibus in Process 2013
T
Profibus PA
Profibus DP (RS 485)
1-12 13-14 15-18 19-24 25-32
120 m 90 m 60 m 30 m 1 m
Line construction with spur
Trunk line
Spur
Max. spur length (each)
No. of nodes
9. Networking components – Profibus DP ProfiHub
Profibus in Process 2013
ProfiHub A5
ProfiHub B5
• 5 Galvanic isolated channels (segments).
• Suitable for RS 485 based networks (PROFIBUS DP, DP-V1,
DP-V2 and MPI).
• Transmission speeds: 9,6 Kbit/s …12 Mbit/s.
• Each channel complies to the DP - RS 485 specification.
• Integrated termination facility for each channel and trunk line.
• IP 65 classification.
• Each channel can serve 1 up to 31 devices.
• No limit in serial placement or cascading of ProfiHubs.
10. Networking components – Profibus DP ProfiHub
Profibus in Process 2013
RS485
• Large networks with star and tree topology
• No limit in the cascading of ProfiHubs
11. Networking components – DP connectors
Profibus in Process 2013
• Wide choice of Cable to suit each application.
• 9-pin DIN is standard way to connect Profibus DP devices together.
• Outdoor equipment generally cable-glanded and hard-wired.
• DP has 5 pin and PA 4 pin M12 plugs and sockets
18. Network test and verification
• Test & verification services ensure:
• The installed networks meet the network design criteria
• They are robust and reliable
• They meet the required industrial safety standards
• They are correctly documented to assist with future maintenance
• They form part of a functional asset management system
• Reliable networks contribute to:
• Higher plant availability
• Improved plant performance
• Contributes to final product quality – regulated industries
• Improvements in maintenance procedures and cost reduction
Profibus in Process 2013
19. Network test and verification
• Physical inspection
• Confirm that design documents have been followed.
• Checks for bus terminators.
• Check for correct cable installation
• Cable type
• Spur lengths
• Bend radius
• Cable separation
• Correct labels
• Correct number of devices per network.
• Consistent earthing concept.
• Compliance with intrinsically safe requirements.
• Junction boxes correctly installed and glanded.
Profibus in Process 2013
20. Network test and verification
• Communication test
• Confirm all master bus settings are correct
• Confirm all devices are in data exchange
• Ensure communication retries are within accepted tolerances
• Use industry standard analysis tools to confirm:
• all devices are in data exchange
• number of communication retries
• number of communication illegal responses
• Confirm devices recover after disconnection
• Confirm system recovers on start up
Profibus in Process 2013
21. Certified Profibus training in the UK
Profibus in process 2013
• Profibus Competence Centre
• Profibus Training Centre
• X.ji@mmu.ac.uk
• 0161 247 6273
• Profibus Training Centre
• andy@verwertraining.com
• 01625 871199
More information at www.uk.profibus.com