2. HEADLINES
• INTRODUCTION
• WHAT IS WIRELESS INSTRUMENTATION ?
• HISTORY OF WIRELESS INSTRUMENTS
• WIRELESS NETWORK ARCHITECTURE
• WIRELESS HART
• ISA 100.11a
• SECURITY
• COST SAVING
• RELIABLITY
• ADVANTAGES
• RISKS
• CONCLUSION
3. INTRODUCTION
• World’s oil giants are looking for improving their
costs in engineering, commissioning, installation and
operation.
• Wireless instrumentation represent major cost savings
• Wireless instrumentation provides flexibility to a
large degree compared to wired instruments.
4. • main contributions to weight savings for wireless
instrumentation also comes from the elimination of
cabling, cable trays, junction boxes, I/O cabinets.
5. WHAT IS WIRELESS
INSTRUMENTATION ?
• They are fast emerging as a complementary
technology to wired instrumentation in oil and gas
industry.
• Wireless instrumentation are simple, reliable, secure
and safe.
6. HISTORY OF WIRELESS INSTRUMENTS
• Wireless is not a new technology, it is only relatively
new to industrial applications.
• Until 2007, wireless instruments are mostly in the
form of small networks.
• with the commercialization sophisticated systems
and large scale networks, interoperability became a
reality with evolving new standards.
7. • This opened up the market for many vendors,
thus creating more options for users.
• The pervasive use of wireless technology in
industrial applications inevitable.
• Technology is maturing at an extremely rapid
place due to the industrial market explosion of
wireless products.
9. WIRELESS HART
• It enables wireless transmission of HART messages.
• The first standard to be released which specifically
targets industrial applications.
• Wireless HART devices are devices with wireless
HART built in or an existing installed HART enabled
device with a wireless HART adapter attached to it.
10. • Wireless HART device is a free standing device that
eliminate the analog connection to the control system.
• The device can be installed any where in the plant
without the cost of wires.
• It operates in the popular 2.4 GHz band, which allows
for global qavailability.
• It offers self configuring and self healing multi-hop
communication
11. ISA 100.11 a
• ISA100.11a is a wireless networking technology
standard developed by the International Society of
Automation (ISA).
• It offers sufficient performance to provide a secure,
stable and reliable network for non critical
monitoring and control applications.
• It operates in the popular 2.4 GHz band which allows
for global availability.
12. • ISA 100.11 a supports both routing and non routing
device.
• So, network topologies can be either star, star mesh or
full mesh depending on configuration of the device in
the network.
• ISA 100.11a network is able to carry multiple field
bus protocols such as foundation field bus.
13. • There is also integrated support for IPV6 traffic and
routing in the network layer.
• ISA 100.11 a application layer is object oriented, and
implements tunneling features.
14. SECURITY
• Security is always a concern in any network.
• Wireless network are considered to present distinctive
challenges.
• Because the wireless transmissions can travel for a
considerable distances.
• The wireless HART standard mandates that network
employ a multi layered approach to network security.
15. • Both transmitter and receiver must authenticate with
the network control system.
• Transmissions are encrypted used a 128-bit NIST-
certified algorithm and verified for completeness and
accuracy upon reception.
• Keys are managed by the gate way and rotated
automatically.
16. • The combinations of authentication, encryption,
verification and key management makes a wireless
network as secure as a wired system.
17. COST SAVINGS
• Wireless network requires none of the infrastructure
improvements like cost of a measurement loop in the
cable, conduit.
• Multiplexing hardware required to connect the sensor
to the facilities DCS (Distributed Control System)
and the resultant savings are substantial.
18. • Most attractive attribute of a wireless network is that
installation cost is significantly reduced when compared
with that of wired system.
• In addition of delivering significant labor and material
cost reductions, deploying wireless network can be done
much faster.
• One installed, wireless networks can be easily and
inexpensively expanded to include additional
measurement points for simply the cost of the transmitter.
19. • With an installed wireless network this investment
can be further leveraged by providing wireless
coverage in different parts of the facilities.
• Wireless networks now a days only requires minimal
maintenance as the advanced transmitters utilize time
synchronized mesh protocol to carefully control the
timing of each transmission
• Wireless instrumentation are self-organizing and
eliminates site surveys.
20. RELIABILITY
• The primary concern of reliability with wireless networks
is based on the assurance of data transmission.
• The wireless HART auto routing meshing capabilities are
spontaneously managed and resulting quick resumption of
service in data transmission links in the event of a
hindrance.
• Auto routing capabilities minimizes or eliminates data
transmission interruption.
21. • Data transmission is digital, the data measured or
transmitted to the field device.
• To ensure reliability digital wireless protocol such as
wireless HART have inherent error checking
functions to ensure signals don’t suffer from drift.
• Modern wireless network offer a reliable upgrade
path that even provides some surprising benefits.
22. • Wireless HART as part of the core design of the field
device network infrastructure creates inherent design
flexibility.
• Using wireless devices and networks as an additional
technology will enhance the overall robustness of the
field device network architecture.
23. ADVANTAGES
• Redundancy of wireless instruments s
• Remote monitoring of internet of tings.
– Monitoring field activities from anywhere in the
world.
– Cost effective.
– Performance improvements through in time
corrective actions.
24. Risks
• Security is an issue with wireless system
• Loss of PV(measuring data).
• Wireless connections are more affected by
noise and interference than a copper wire.
• Messages can get lost and may have to resend
this makes it hard for wireless links to meet
demands in real time.
25. CONCLUSION
• High speed applications may not be suitable for
wireless due to potential lags in communications or
asynchronous communications between wireless
device.
• Oil and gas operators to tighten process control,
increase performance and extend the time between
maintenance shutdown.
26. REFERENCE
[1] ISA100.11a - Wireless networking technology standard
developed by the International Society of Automation (ISA).
[2] IEC62591-1 - Industrial networks - Wireless communication
network and communication profiles - WirelessHART™.
[3] Robb Sparks Reduce Costs with Wireless Instrumentation
http://www2.emersonprocess.com/siteadmincenter/PM%20Rose
mount%20Analytical%20Documents/
Liq_Article_Wireless_Instrumentation_in_Power_200908.pdf.
27. [4] Moazzam Shamsi Wireless and Wired Network
Reliability and Maintenance.
http://www2.emersonprocess.com/siteadmincenter/PM
%20Articles/Wireless%20and%20Wired%
20Network%20Reliability%20and%20Maintenance.pdf
.
