1. Using FreeWave Wireless with EtherNet I/P for Rockwell Solutions
Curt Goldman- Business Development Manager
Randy Maes- Rockwell Specialist
October 4, 2011

2. FreeWave EtherNet for Rockwell Agenda
EtherNet I/P Basics
Radio Modem Basics – WiFi vs. FreeWave FHSS 900 MHz
FreeWave EtherNet Product Offering
Applications using Rockwell with EtherNet I/P Wireless
© 2011 FreeWave Technologies, Inc.
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3. Not all EtherNet is created equal
FreeWave Modems and EtherNet/IP

4. EtherNet/IP Basics

5. EtherNet IP Basics
EtherNet/IP was developed by Rockwell as their EtherNet communications protocol
Adopted and now managed by the ODVA (Open DeviceNet Vendors Association) as the standard for Industrial Automation EtherNet communications
Uses CIP (Common Industrial Protocol) in its upper layer
Two basic versions
UDP/IP
TCP/IP
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6. EtherNet IP Basics UDP/IP Implicit messaging
Also referred to as “Producer/Consumer”
Designed for I/O data exchange
Connection is “always on”
Data is always being exchanged
Depending on size of network, can be very “bandwidth” intensive
If four packets in a row are missed, the connection is broken and re- established
This will take upwards of eight seconds
No message instruction needed in ladder logic to move data from one point to another
Only available in Logix based processors (ControlLogix, CompactLogix)
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7. EtherNet IP Basics TCP/IP Explicit messaging
“Message Instruction” based communications
Only active when a message instruction is enabled
Requires ladder logic
Not bandwidth intensive
Available in all EtherNet enabled Allen Bradley processors
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8. Radio Modem Basics

9. Radio Modem Basics
In the Industrial Automation world, there are two basic types of radio modems used for EtherNet communications
DSSS
802.11(x) or WiFi
FHSS
900MHz Frequency Hopping Spread Spectrum
© 2011 FreeWave Technologies, Inc.
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10. Radio Modem Basics 802.11 compared to FHSS
2.4GHz and/or 5.8GHz frequency range
Can operate as a Peer to Peer network
Typically higher throughput speed
“Open” protocol
Any WiFi device can connect with any other WiFi device
Easily interfered with (when compared to FHSS)
Consumer based products
Chip sets, supporting components manufactured for consumer market
Usually means lower quality because of “mass production”
Sharing frequency bandwidth the all other “WiFi” products
Typically much lower transmit power
250mW considered high power
Much lower receiver sensitivity
-94 1Mbps*
-72d 54Mbps*
*Rated Mbps is “over the air” rating. Actual throughput is usually less than half rated speed
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11. Radio Modem Basics FHSS compared to 802.11
900MHz frequency range (typically)
Much more robust than DSSS
Operates as a “Master/Slave” network
“Proprietary” protocol
Only FreeWave modems will talk with FreeWave modems
Very difficult to interfere with
Very solid communications even in harsh RF environments
Industrial grade products
Chip sets, supporting components manufactured for industrial market
Typically much higher transmit power
1 watt output
Much higher receiver sensitivity
Kbps
Kbps
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12. Security

13. Security
Because “WiFi” is an “open” standard, security needs to be handled at the application layer
Any WiFi radio will connect with any other WiFi radio at the RF level
To make the application secure, encryption must be added to the application layer
Encryption adds data and processing to the data layer
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14. Security
FreeWave’s FHSS radios use a proprietary or “closed” RF protocol
Only a FreeWave Radio will connect to a FreeWave radio
Close protocol radios provide a level of security that cannot be matched with encryption
Because encryption is required by spec in many applications FreeWave does offer AES 128 bit encryption
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15. Product Offerings

16. FreeWave EtherNet Product Offering
“ Plus” stands for EtherNet(“packet radio”)
FGR2-PE Family
Long distance
HTplus Family
High throughput

17. Product Positioning Fast HTplus-RE FGR2-PE Far 1.2 Mbps 867 kbps
10 mi
20 mi
30 mi
40 mi
50 mi
60 mi
HTplus-RE
FGR2-PE
Far
DISCLAIMER: Actual results may vary and depend on individual RF conditions such as Antenna height, RF link, Interference etc.
The information contained herein is based on assumptions and tests which we believe to be reliable but is not guaranteed by us as being accurate and does not purport to be a complete statement or summary of the available data. The owner, publisher, editor and their associates are not responsible for errors and omissions. Any opinions expressed are subject to change without notice. We encourage customers to supplement the information in this graphic with independent research and other professional advice.

18. FGR2-PE LONG RANGE Industrial EtherNet data radio
Two serial ports(EIA-232/422/485)
Two EtherNet ports (10/100), switched
New rugged enclosure
Installation friendly, all connectors and lights on one side
Backwards compatible with FGRplus
115 kbps RF data rate
Din Rail Mount
Shoe Mount
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19. FGR2-PE Value Proposition
Superior RF Performance
Sensitivity & Selectivity
Multiple Protocol
Both serial & EtherNet
Maximum Flexibility
Single Radio Solution
Rugged & Reliable
-40° to +75° C Temperature range
Secure
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20. Security Multi-Layered Approach Frequency Hopping Spread Spectrum
Call Book (Point-to-Point)
Radius Authentication
SSL (Transport Layer Security)
Encryption (AES)
VLAN (Privacy)
MAC Address Filtering
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21. HTplus-RE High speed EtherNet radio 867 Kbps over-the-air data rate
Superior interference rejection
Range of 15 miles
-40° to +60° C Temperature range
Multiple protocol, serial & EtherNet
Gateway, Endpoint, or Repeater in one radio 21

22. HTplus-RE Value Proposition
Security
AES 128 bit
Radius Central Authentication
VLAN Tagging
SNMP
Mac filtering
Fast Hopping
Provides superior interference rejection
Current hop rate is x per second
Over the air data rate up to 867 Kbps
Data rate at ~
Data rate at 614
Range
15 mile link with LOS
Ability to extend further through repeaters
Error Free Communications
32 bit CRC with automatic retransmission
Receive sensitivity -102dBm (10-4 BER)

23. Applications

24. Applications
When creating an application that needs wireless EtherNet communications, the goals of the application needs to be looked at first
How robust must the application be?
How crowded is the RF environment?
How much data really needs to be moved from one processor to another?
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25. Applications UDP/IP With UDP/IP a connection:
A connection is established between the consuming processor and the producing processor
This connection uses missing packets to determine the health of the connection
There is no “flow control” in UDP/IP other than RPI (Requested Packet Interval)
RPI controls how frequently a packet will be “produced/consumed” but does not control when this takes place
With lack of flow control, it is possible to have any number of packets to be “in transit” at the same time
There is no “Master/Slave” relationship within a given network

26. Applications UDP/IP UDP/IP connection do’s: UDP/IP connection don’ts
Determine what data really needs to be moved from one processor to another and only move those tags and/or I/O points
Set the RPI to the highest number that the application will tolerate
Structure your application so that one processor is the network master (host) and connect that processor with the radio network gateway (master)
Use “Rack Optimization” whenever possible
UDP/IP connection don’ts
Don’t forget your radio network is a “master/slave” type network
Underestimate the amount of bandwidth that UDP/IP can consume

27. Applications TCP/IP With TCP/IP connection:
When a message instruction is enabled;
A connection is established
The data is sent and acknowledged
The connection is closed
It is very easy to provide “flow control”
While any processor in the network can initiate communications, best practice is to have a network master controlling all of the communications

28. Applications TCP/IP TCP/IP connection do’s: TCP/IP connection don’ts
Stagger message your message instructions
Structure you network so that one processor is the network master (host) and connect that processor with the radio network gateway (master)
Only move data that really needs to be moved from one processor to another
TCP/IP connection don’ts
Don’t forget that the radio network is a “master/slave” type network

29. Summary
Whether or not you are using UDP/IP or TCP/IP always remember to plan ahead. It’s common that the wireless aspect of an application is overlooked when in the planning stage. This can result in poor performance and a troublesome system. While “WiFi” type radios appear on the surface to “cover it all” the reality is they can’t compete with the robustness, reliability and security that is provided with FreeWave’s FHSS radios.
With a little upfront planning and remembering the wireless system when setting your goals it is possible to have not only all of the application needs met but also having them met with the highest level of security and reliability possible in today’s wireless world.
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