Post on 06-Aug-2015
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Pepperl+Fuchs Introducing WirelessHART with EtherNet/IP Gateway and Add-On-Profile
Robert Schosker
Product Manager - Pepperl+Fuchs
June, 2015
www.pepperl-fuchs.com
WirelessHART EtherNet/IP Gateway
Robert Schosker - Product Manager
www.pepperl-fuchs.com
Your Presenter
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Content
HART – General Characteristics
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Superimposed HART signal
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Current
Time
1 0 0 0 1 1 1
4..20mA
1/1200s
1200Hz 2200Hz
-0.5mA
+0.5mA
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HART signal
HART communication uses BELL 202 telephone
communication standard
BELL 202 is a Frequency Shift Keying (FSK) technology
Superimposed sine wave on conventional 4..20 mA signal
Logic 1: 1200Hz
Logic 0: 2200Hz
Communication speed is 1200kbps (1kBaud)
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Connection Methods
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4..20mA with 1mApp
240Ω
240mVpp
Gerrit Lohmann / Thomas Klatt 20.03.2008
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Content
Wired to Wireless HART
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From HART to WirelessHART
Wireless
Commonly used in consumer and office world
Can be used in industry due to technological progress
Important: must be a standard
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HART
Used since 25 years
35% of all field devices use HART
Lot‘s of DCS and AMS have HART interface
Standard in Process Automation
WirelessHART
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From HART to WirelessHART
Wireless is a new enhancement to the HART Technology Idea
Keep the well known and proven protocol
Change the physical layer from the modulated sine on the 4..20 mA loop
to radios and create the first wireless standard for PA
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From HART to WirelessHART
Objectives
An open and interoperable standard
As easy as using wired HART
Enable wireless access to existing HART devices
Use the same configuration, maintenance, diagnostic tools and
procedures
Require little additional training
Worldwide usable
Hardware (radios) must be available from the shelf
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Elements of WirelessHART
As Radio Frequency the 2.4GHz ISM Band has been chosen
Advantages:
Worldwide usable without any permission (some restrictions apply)
Cheap and freely available hardware due to WLAN standard
IEC802.15.4
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Elements of WirelessHART
The Elements of WirelessHART are:
Flat mesh network
Network management
Frequency hopping
Time Division Multiple Access (TDMA)
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Mesh Network Topology
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Mesh Network
All network
participants
form a mesh
The range
Broken paths
Self healing
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Network Management
Network management
The Network is organized and controlled by a central component, the
Network Manager
The Network Manager
Forms the network
Determines the communication paths between all participants
Determines alternative paths and timings
Newly added participants are added to the network automatically
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Frequency Hopping
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Distance of Channel Center Frequencies: 5MHz
Bandwidth of Channel: 2MHz
2,405GHz 2,480GHz
Frequency Hopping
WirelessHART uses
15 Channels
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TDMA Time
10m
s
20m
s
30m
s
40m
s
50m
s
60m
s
70m
s
80m
s
90m
s
IEEE802.1
5.4
Channels
15
:
7
6
5
4
3 Blacklisted
2
1
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TDMA
All Synchronized
10ms time frame
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Building WirelessHART Networks
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NWID: OK
Join Key: OK
Join granted
NWID
Join Key
A unique Network
ID (user selectable)
Second
WirelessHART
Network in parallel
A “Join Key”
required
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Security and Integration of
WirelessHART
WirelessHART is as usable as conventional HART products
Therefore, also the layout of a communication structure does
not differ too much
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All messages are encrypted with a 128Bit AES encryption key
The encryption keys are distributed and changed in certain intervals by the Network Manager
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Layout of wired HART structure
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Zone 1
Control Maintenance
ERP
Interface Interface
Field Devices
Fieldbus
Network
SCADA
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Layout of WirelessHART structure
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Zone 1
Control Maintenance
ERP
WirelessHART
Gateway
Field Devices
Fieldbus
Network
SCADA
WirelessHART
Gateway
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Where can it be used?
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Where can it be used?
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Where can Wireless HART be used?
Oil & Gas Refineries
Continuous process Facilities
Offshore platforms
Pharmaceuticals
Mobility
Waste Water
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Wireless HART Products
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Content
WirelessHART Gateway
WirelessHART Adapter
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WirelessHART Gateway
Includes network management, Access Point and Interfaces to Bus System
Redundant Power Supply Serves up to 250
WirelessHART Devices Zone 2/Div 2 Mounting Radio Approvals R&TTE FCC Other countries*
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www.pepperl-fuchs.com
WirelessHART Gateway
Ethernet with 100MBit/s
EtherNet/IP
Hport IP
Modbus TCP
RS485 with daisy chain capability
HPort
Modbus RTU
Web Server Interface
AOP, DTM, and DD for HOST
Integration
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WirelessHART Adapter
Upgrades conventional field devices to be WirelessHART
Battery supplies Adapter and Field Device for autonomous measurements
Can serve up to 4 HART FDs General Purpose, Div 1, Zone 1,
and Div 2/Zone2 Radio Approvals R&TTE FCC Other Countries*
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WirelessHART Adapter
Intelligent Power Management allows for Battery Lifetimes up to up to 10 years User-settable burst interval FD is not powered in interval When interval is over, FD get’s powered,
value read out and send wirelessly FD the get’s unpowered again
Works with standard 4..20mA device (current conversion)
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Mounting of the Adaptor
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rotatable
Adaptor
rotatable
Antenna
Cable for
4 … 20mA
signal
(if required) Due to rotatable adaptor and antenna, the
antenna can be adjusted to the required
position (horizontal, regardless of mounting
position of field device)
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System Integration: Rockwell Automation
Studio 5000™
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System Integration
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System Integration: AOP
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System Integration: AOP
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System Integration: AOP
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System Integration: AOP
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Need more information?
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Robert Schosker: rschosker@us.pepperl-fuchs.com
Bernd Schuessler: bschuessler@us.pepperl-fuchs.com
Visit Pepperl+Fuchs at www.pepperl-fuch.us
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