Siemens SIMATIC NET SCALANCE W760 Series Instruction sheet

SCALANCE W760/W720 to IEEE
802.11n Web Based Management
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SIMATIC NET
Industrial Wireless LAN
SCALANCE W760/W720 to IEEE
802.11n Web Based Management
Configuration Manual
11/2014
C79000
-G8976-C350-03
Introduction
1
Description
2
Technical basics
3
Assignment of an IP address
4
Configuring with Web Based
Management
5
Upkeep and maintenance
6
Troubleshooting/FAQ
7
Appendix A
A
Appendix B
B
Appendix C
C
Appendix D
D

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
C79000-G8976-C350-03
Ⓟ
12/2014 Subject to change
Copyright © Siemens AG 2013 - 2014.
All rights reserved
Legal information
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This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03 3
Table of contents
1 Introduction............................................................................................................................................. 7
1.1 Information on the Configuration Manual..................................................................................7
1.2 Security information ..................................................................................................................9
1.3 Type designations.....................................................................................................................9
2 Description............................................................................................................................................ 11
2.1 Network structures ..................................................................................................................11
2.2 Possible applications of SCALANCE W700 devices ..............................................................15
2.3 Product characteristics............................................................................................................16
2.4 IEEE 802.11n..........................................................................................................................18
2.5 Requirements for installation and operation ...........................................................................21
3 Technical basics ................................................................................................................................... 23
3.1 VLAN.......................................................................................................................................23
3.2 MAC-based communication....................................................................................................23
3.3 iPCF / iPCF-MC ......................................................................................................................25
3.4 NAT/NAPT ..............................................................................................................................27
3.5 SNMP......................................................................................................................................28
3.6 Spanning Tree ........................................................................................................................30
3.6.1 RSTP, MSTP, CIST ................................................................................................................31
4 Assignment of an IP address................................................................................................................. 33
4.1 Structure of an IP address ......................................................................................................33
4.2 Initial assignment of an IP address.........................................................................................34
4.3 Address assignment with DHCP.............................................................................................34
4.4 Address assignment with the Primary Setup Tool..................................................................35
4.5 Address assignment with STEP 7 ..........................................................................................36
5 Configuring with Web Based Management............................................................................................ 37
5.1 Web Based Management .......................................................................................................37
5.2 Login .......................................................................................................................................38
5.3 "Wizard" menu ........................................................................................................................41
5.3.1 Basic Wizard ...........................................................................................................................41
5.3.1.1 System Settings ......................................................................................................................42
5.3.1.2 Country Settings .....................................................................................................................44
5.3.1.3 IP Address Settings ................................................................................................................45
5.3.1.4 Management Interfaces ..........................................................................................................46

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5.3.1.5 Antenna Settings.................................................................................................................... 47
5.3.1.6 Radio Settings........................................................................................................................ 48
5.3.1.7 Access Point Settings ............................................................................................................ 50
5.3.1.8 Client Settings........................................................................................................................ 51
5.3.1.9 Client Allowed Channel Settings............................................................................................ 53
5.3.1.10 Security Settings .................................................................................................................... 55
5.3.1.11 Dot1x Supplicant Settings...................................................................................................... 57
5.3.1.12 Dot1x Radius Server Settings................................................................................................ 58
5.3.1.13 Summary of Settings.............................................................................................................. 59
5.4 "Information" menu................................................................................................................. 60
5.4.1 I&M......................................................................................................................................... 60
5.4.2 Start Page .............................................................................................................................. 61
5.4.3 Versions ................................................................................................................................. 66
5.4.4 ARP Table.............................................................................................................................. 67
5.4.5 Log Tables ............................................................................................................................. 68
5.4.5.1 Event Log ............................................................................................................................... 68
5.4.5.2 WLAN Authentication Log...................................................................................................... 71
5.4.6 Faults ..................................................................................................................................... 72
5.4.7 Redundancy........................................................................................................................... 73
5.4.8 Ethernet Statistics .................................................................................................................. 77
5.4.8.1 Interface statistics .................................................................................................................. 77
5.4.8.2 Packet Size ............................................................................................................................ 78
5.4.8.3 Packet Type ........................................................................................................................... 79
5.4.8.4 Packet Error ........................................................................................................................... 80
5.4.9 Learning Table ....................................................................................................................... 81
5.4.10 DHCP Server ......................................................................................................................... 82
5.4.11 WLAN..................................................................................................................................... 84
5.4.11.1 Overview AP .......................................................................................................................... 84
5.4.11.2 Client List ............................................................................................................................... 86
5.4.11.3 WDS List ................................................................................................................................ 87
5.4.11.4 Overlap AP............................................................................................................................. 89
5.4.11.5 Overview Client ...................................................................................................................... 90
5.4.11.6 Available AP........................................................................................................................... 92
5.4.11.7 IP Mapping Table................................................................................................................... 94
5.4.12 WLAN Statistics ..................................................................................................................... 96
5.4.12.1 Errors ..................................................................................................................................... 96
5.4.12.2 Management Sent.................................................................................................................. 98
5.4.12.3 Management Received ........................................................................................................ 100
5.4.12.4 Data Sent ............................................................................................................................. 102
5.4.12.5 Data Received...................................................................................................................... 104
5.5 "System" menu..................................................................................................................... 106
5.5.1 Configuration........................................................................................................................ 106
5.5.2 General ................................................................................................................................ 109
5.5.2.1 Device .................................................................................................................................. 109
5.5.2.2 Coordinates.......................................................................................................................... 110
5.5.3 Agent IP ............................................................................................................................... 112
5.5.4 DNS Client ........................................................................................................................... 114
5.5.5 Restart.................................................................................................................................. 116
5.5.6 Commit Control .................................................................................................................... 118
5.5.7 Load&Save........................................................................................................................... 119
5.5.7.1 HTTP.................................................................................................................................... 121

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Configuration Manual, 11/2014, C79000-G8976-C350-03 5
5.5.7.2 TFTP .....................................................................................................................................123
5.5.7.3 Passwords ............................................................................................................................125
5.5.8 Events ...................................................................................................................................127
5.5.8.1 Configuration.........................................................................................................................127
5.5.8.2 Severity .................................................................................................................................129
5.5.9 SMTP Client..........................................................................................................................130
5.5.10 DHCP....................................................................................................................................132
5.5.10.1 DHCP Client..........................................................................................................................132
5.5.10.2 DHCP server.........................................................................................................................134
5.5.10.3 DHCP Options ......................................................................................................................136
5.5.10.4 Static Leases ........................................................................................................................138
5.5.11 SNMP....................................................................................................................................139
5.5.11.1 General .................................................................................................................................139
5.5.11.2 Traps.....................................................................................................................................141
5.5.11.3 v3 Groups .............................................................................................................................142
5.5.11.4 v3 Users................................................................................................................................145
5.5.12 System Time .........................................................................................................................147
5.5.12.1 Manual Setting ......................................................................................................................147
5.5.12.2 DST Overview.......................................................................................................................149
5.5.12.3 DST Configuration ................................................................................................................150
5.5.12.4 SNTP Client ..........................................................................................................................154
5.5.12.5 NTP Client.............................................................................................................................157
5.5.12.6 SIMATIC Time Client ............................................................................................................159
5.5.13 Auto Logout...........................................................................................................................160
5.5.14 Syslog Client .........................................................................................................................160
5.5.15 Fault Monitoring ....................................................................................................................162
5.5.15.1 Power Supply........................................................................................................................162
5.5.15.2 Link Change..........................................................................................................................163
5.5.16 PNIO .....................................................................................................................................164
5.5.17 Ping.......................................................................................................................................166
5.6 "Interfaces" menu..................................................................................................................167
5.6.1 Ethernet ................................................................................................................................167
5.6.1.1 Ports Overview......................................................................................................................167
5.6.1.2 Configuration.........................................................................................................................168
5.6.2 WLAN....................................................................................................................................170
5.6.2.1 Basic .....................................................................................................................................170
5.6.2.2 Advanced ..............................................................................................................................174
5.6.2.3 Antennas ...............................................................................................................................175
5.6.2.4 Allowed Channels .................................................................................................................178
5.6.2.5 802.11n .................................................................................................................................179
5.6.2.6 AP .........................................................................................................................................181
5.6.2.7 AP WDS................................................................................................................................184
5.6.2.8 AP 802.11a/b/g Rates...........................................................................................................185
5.6.2.9 AP 802.11n Rates.................................................................................................................188
5.6.2.10 Client .....................................................................................................................................190
5.6.2.11 Signal Recorder ....................................................................................................................193
5.7 "Layer 2" menu .....................................................................................................................198
5.7.1 VLAN.....................................................................................................................................198
5.7.1.1 General .................................................................................................................................198
5.7.1.2 Port Based ............................................................................................................................200
5.7.2 Dynamic MAC Aging.............................................................................................................202

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5.7.3 Spanning Tree...................................................................................................................... 203
5.7.3.1 General ................................................................................................................................ 203
5.7.3.2 CIST General ....................................................................................................................... 204
5.7.3.3 CIST Port ............................................................................................................................. 207
5.7.3.4 MST general......................................................................................................................... 210
5.7.3.5 MST Port .............................................................................................................................. 212
5.7.4 DCP Forwarding................................................................................................................... 214
5.7.5 LLDP .................................................................................................................................... 215
5.8 "Layer 3" menu..................................................................................................................... 216
5.8.1 NAT ...................................................................................................................................... 216
5.8.1.1 Basic .................................................................................................................................... 216
5.8.1.2 NAPT.................................................................................................................................... 218
5.9 "Security" menu.................................................................................................................... 220
5.9.1 Passwords............................................................................................................................ 220
5.9.2 WLAN................................................................................................................................... 221
5.9.2.1 Basic .................................................................................................................................... 221
5.9.2.2 AP Communication .............................................................................................................. 224
5.9.2.3 AP RADIUS Authenticator ................................................................................................... 225
5.9.2.4 Client RADIUS Supplicant ................................................................................................... 227
5.9.2.5 Keys ..................................................................................................................................... 228
5.9.3 Management ACL ................................................................................................................ 229
5.10 "iFeatures" menu.................................................................................................................. 232
5.10.1 iPCF ..................................................................................................................................... 232
5.10.2 iPCF-MC .............................................................................................................................. 233
6 Upkeep and maintenance ....................................................................................................................235
6.1 Firmware update - via WBM ................................................................................................ 235
6.2 Restoring the default parameter settings............................................................................. 236
7 Troubleshooting/FAQ...........................................................................................................................237
7.1 Firmware update via WBM or CLI not possible ................................................................... 237
7.2 Disrupted data transmission due to the received power being too high.............................. 238
7.3 Compatibility with predecessor products ............................................................................. 239
7.4 Instructions for secure network design ................................................................................ 239
A Appendix A ..........................................................................................................................................241
A.1 Supported MIB files.............................................................................................................. 241
B Appendix B ..........................................................................................................................................243
B.1 Private MIB variables ........................................................................................................... 243
C Appendix C..........................................................................................................................................245
C.1 Underlying standards ........................................................................................................... 245
D Appendix D..........................................................................................................................................247
D.1 Messages in the event log ................................................................................................... 247
D.2 Messages in the WLAN authentication log .......................................................................... 251
Index ...................................................................................................................................................253

SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03 7
Introduction
1
1.1
Information on the Configuration Manual
Validity of the configuration manual
This Configuration Manual covers the following products:
●SCALANCE W721-1 RJ-45
●SCALANCE W722-1 RJ-45
●SCALANCE W761-1 RJ-45
This Configuration Manual applies to the following software version:
●SCALANCE W700 firmware as of Version V 5.00
Purpose of the Configuration Manual
This Configuration Manual is intended to provide you with the information you require to
commission and operate devices correctly. It explains how to configure the devices and how
to integrate them in a WLAN network.
The operating instructions for the corresponding device describe how to install and connect
up the devices correctly.
Orientation in the documentation
Apart from the Configuration Manual you are currently reading, the following documentation
is also available from SIMATIC NET on the topic of Industrial Wireless LANs:
●Configuration Manual: SCALANCE W760 / W720 Command Line Interface
This document contains the CLI commands that are supported by SCALANCE W700
devices.
●Performance data 802.11 abgn SCALANCE W760/W720
This document contains information about the frequency, modulation, transmit power and
receiver sensitivity.
●Operating Instructions SCALANCE W721-1 / W722-1 / W761-1
This document contains information on installing and connecting up the following
products and their approvals.
–SCALANCE W721-1 RJ-45
–SCALANCE W722-1 RJ-45
–SCALANCE W761-1 RJ-45

Introduction
1.1 Information on the Configuration Manual
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
8Configuration Manual, 11/2014, C79000-G8976-C350-03
●System Manual Structure of an Industrial Wireless LAN
Apart from the description of the physical basics and a presentation of the main IEEE
standards, this also contains information on data security and a description of the
industrial applications of wireless LAN.
You should read this manual if you want to set up WLAN networks with a more complex
structure (not simply a connection between two devices).
●System manual RCoax
This system manual contains both an explanation of the fundamental technical aspects
as well as a description of the individual RCoax components and their functionality.
Installation/commissioning and connection of RCoax components and their operating
principle are explained. The possible applications of the various SIMATIC NET
components are described.
●System manual - Passive Network Components IWLAN
This system manual explains the entire IWLAN cabling that you require for your IWLAN
application. For a flexible combination and installation of the individual IWLAN
components both indoors and outdoors, a wide ranging selection of compatible coaxial
accessories are available. The system manual also covers connecting cables as well as a
variety of plug-in connectors, lightning protectors, a power splitter and an attenuator.
SIMATIC NET manuals
You will find SIMATIC NET manuals on the Internet pages of Siemens Industry Online
Support:
●Using the search function:
support.automation.siemens.com
(http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo2&aktprim=99&la
ng=en)
Enter the entry ID of the relevant manual as the search item.
●In the navigation panel on the left-hand side in the area "Industrial Communication":
Industrial communication
(http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=de&siteid=
csius&aktprim=0&extranet=standard&viewreg=WW&objid=10805878&treeLang=en)
Go to the required product group and make the following settings:
tab "Entry list", Entry type "Manuals"
You will find the documentation for the SIMATIC NET products relevant here on the data
storage medium that ships with some products:
●Product CD / product DVD
●SIMATIC NET Manual Collection
●SIMATIC NET IWLAN CD

Introduction
1.2 Security information
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03 9
Further documentation
The "SIMATIC NET Industrial Ethernet Network Manual" contains information on other
SIMATIC NET products that you can operate along with the devices of this product line in an
Industrial Ethernet network. There, you will find among other things optical performance data
of the communication partners that you require for the installation.
The "SIMATIC NET Industrial Ethernet Network Manual" can be found on the Internet pages
of Siemens Industry Online Support under the following entry ID:
27069465 (http://support.automation.siemens.com/WW/view/en/27069465)
1.2
Security information
Siemens provides automation and drive products with industrial security functions that
support the secure operation of plants or machines. They are an important component in a
holistic industrial security concept. With this in mind, our products undergo continuous
development. We therefore recommend that you keep yourself informed with respect to our
product updates. Please find further information and newsletters on this subject at:
http://support.automation.siemens.com.
To ensure the secure operation of a plant or machine it is also necessary to take suitable
preventive action (e.g. cell protection concept) and to integrate the automation and drive
components into a state-of-the-art holistic industrial security concept for the entire plant or
machine. Any third-party products that may be in use must also be taken into account.
Please find further information at: http://www.siemens.com/industrialsecurity
1.3
Type designations
Abbreviations used
The information in the manuals for the SCALANCE W700 product family often applies to
more than one product variant. In such situations, the designations of the products are
shortened to avoid having to list all the type designations. The following table shows how the
abbreviations relate to the product variants.
Product group
The designation . . .
stands for . . .
Product name
Access point
W761-1
SCALANCE W761-1 RJ-45
Client
W721-1
SCALANCE W721-1 RJ-45
Client with iFeatures
W722-1
SCALANCE W722-1 RJ-45
All SCALANCE W devices W700 SCALANCE W761-1 RJ-45
SCALANCE W721-1 RJ-45
SCALANCE W722-1 RJ-45

Introduction
1.3 Type designations
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
10 Configuration Manual, 11/2014, C79000-G8976-C350-03
The type designation of a SCALANCE W700 is made up of several parts that have the
following meaning:
SIMATIC NET glossary
Explanations of many of the specialist terms used in this documentation can be found in the
SIMATIC NET glossary.
You will find the SIMATIC NET glossary here:
●SIMATIC NET Manual Collection or product DVD
The DVD ships with certain SIMATIC NET products.
●On the Internet under the following entry ID:
50305045 (http://support.automation.siemens.com/WW/view/en/50305045)

SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03 11
Description
2
2.1
Network structures
The following article deals with the setting up of various network structures using access
points and clients. A client is also an access point in client mode.
Standalone configuration with access point
This configuration does not require a server and the access point does not have a
connection to a wired Ethernet. Within its transmission range, the access point forwards data
from one WLAN node to another.
The wireless network has a unique name. All the devices exchanging data within this
network must be configured with this name.
Figure 2-1 Standalone configuration of an access point. The gray area symbolizes the wireless
range of the access point.

Description
2.1 Network structures
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12 Configuration Manual, 11/2014, C79000-G8976-C350-03
Wireless access to a wired Ethernet network
If one (or more) access points have access to wired Ethernet, the following applications are
possible:
●A single device as gateway:
A wireless network can be connected to a wired network via an access point.
●Span of wireless coverage for the wireless network with several access points:
The access points are all configured with the same unique SSID (network name). All
nodes that want to communicate over this network must also be configured with this
SSID.
If a mobile station moves from the area covered by one access point to the area covered
by another access point, the wireless link is maintained (roaming).
Figure 2-2 Wireless connection of a mobile station over two cells (roaming)

Description
2.1 Network structures
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Configuration Manual, 11/2014, C79000-G8976-C350-03 13
Multichannel configuration
If neighboring access points use the same frequency channel, this can lead to longer
response times due to any collisions that may occur. If the configuration shown in the figure
is implemented as a single-channel system, computers A and B cannot communicate at the
same time with the access points in their wireless cells.
If neighboring access points are set up for different frequencies, this leads to a considerable
improvement in performance. As a result, neighboring wireless cells each have their own
medium available and the delays resulting from time-offset transmission no longer occur.
The channel spacing should be as large as possible; a practical value is 25 MHz. Even in a
multichannel configuration, all access points can be configured with the same network name.
Figure 2-3 Multichannel configuration on channels 1 and 2 with four access points

Description
2.1 Network structures
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14 Configuration Manual, 11/2014, C79000-G8976-C350-03
Wireless Distribution System (WDS)
WDS allows direct links between access points and or between access points and other
WDS-compliant devices. These are used to create a wireless backbone or to connect an
individual access point to a network that cannot be connected directly to the cable
infrastructure due to its location.
Two alternative configurations are possible. The WDS partner can be configured using the
WDS ID or using its MAC address.
Figure 2-4 Implementation of WDS with four access points

Description
2.2 Possible applications of SCALANCE W700 devices
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Configuration Manual, 11/2014, C79000-G8976-C350-03 15
Network access with a client or an access point in client mode
The device can be used to integrate wired Ethernet devices (for example SIMATIC S7 PLC)
in a wireless network.
Figure 2-5 Connecting a SIMATIC S7 PLC to a wireless LAN.
2.2
Possible applications of SCALANCE W700 devices
Note
The SIMATIC NET WLAN products use OpenSSL.
This is open source code with license conditions
(BSD).
Please refer to the current license conditions.
Since the driver includes encryption software, you should also adhere to the appropriate
regulations for your specific country.
Possible applications of the SCALANCE W761
The SCALANCE W761 is equipped with an Ethernet interface and a WLAN interface. This
makes the device suitable for the following applications:
●The SCALANCE W761 forwards data within its transmission range from one node to
another without a connection to wired Ethernet being necessary.
●The SCALANCE W761 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W761 supports protection class IP20.

Description
2.3 Product characteristics
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16 Configuration Manual, 11/2014, C79000-G8976-C350-03
Possible applications of the SCALANCE W722
The SCALANCE W722 is equipped with an Ethernet interface and a WLAN interface. This
makes the device suitable for the following applications:
●The SCALANCE W722 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W722 can be used with iPCF as a client.
●The SCALANCE W722 supports protection class IP20.
Possible applications of the SCALANCE W721
The SCALANCE W721 is equipped with two Ethernet interfaces and a WLAN interface. This
makes the device suitable for the following applications:
●The SCALANCE W721 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W721 supports protection class IP20.
2.3
Product characteristics
Properties of the SCALANCE W700 devices
●The Ethernet interface supports the following:
–10 Mbps and 100 Mbps both in full and half duplex
–Autocrossing
–Autopolarity
●Operating the WLAN interface in the frequency bands 2.4 GHz and 5 GHz.
●The WLAN interface is compatible with the standards IEEE 802.11a , IEEE 802.11b , and
IEEE 802.11g. In the 802.11a and 802.11g mode, the gross transmission rate is up to 54
Mbps.
●IEEE 802.11n
High-speed WLAN standard (wireless LAN) and can operate in the 2.4 GHz and in the 5
GHz range.
●IEEE 802.11h - Supplement to IEEE 802.11a
In the 802.11h mode, the methods "Transmit Power Control (TPC)" as well as "Dynamic
Frequency Selection (DFS)" are used in the range 5.25 - 5.35 and 5.47 - 5.75 GHz. In
some countries, this allows the frequency subband of 5.47 - 5.725 GHz to be used in the
outdoor area even with higher transmit powers.
TPC is a method of adapting the transmit power.
With DFS, the access point searches for primary users for 60 seconds before starting
communication on the selected channel. During this time the access point does not send
beacons. If signals are found on the channel, the channel is blocked for 30 minutes, the
access point changes channel and repeats the check. Primary users are also searched
for during operation.

Description
2.3 Product characteristics
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Configuration Manual, 11/2014, C79000-G8976-C350-03 17
●Support of the authentication standards WPA, WPA-PSK, WPA2, WPA2-PSK and
IEEE 802.1x and the encryption methods WEP, AES and TKIP.
Note
The transmission standard IEEE 802.11n
with the setting "802.11n" or "802.11n only"
supports only WPA2/WPA2
-PSK with AES in the security settings.
●For better transmission via WLAN, the function WMM (wireless multimedia) is enabled.
The frames are evaluated according to their priority and sent prioritized via the WLAN
interface.
●Suitable for inclusion of a RADIUS server for authentication.
●Device-related and application-related monitoring of the wireless connection.
●The interoperability of the devices with Wi-Fi devices of other vendors was tested
thoroughly.
●Before commissioning the SCALANCE W700, check the wireless conditions on site. If
you intend to use Industrial Wireless LAN systems and WirelessHART systems in the 2.4
GHz band, you will need to plan the use of the channels. At all costs, avoid parallel use of
overlapping frequency ranges. The following overlaps exist with Industrial Wireless LAN
and WirelessHART:
IWLAN channel
IEEE 802.11 b/g/n
WHART channel
IEEE 802.15.4
1 11 - 16
6
15 - 20
7
16 - 21
11
20 - 25
13
21 - 25
Note
All SCALANCE W700 access points can be reconfigured for client mode.

Description
2.4 IEEE 802.11n
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
18 Configuration Manual, 11/2014, C79000-G8976-C350-03
Features of the SCALANCE W700
Type
Number of
WLAN
ports
Antennas
Number and
type of Ethernet
interface
Degree of
protection
Order no.
SCALANCE W761-1 RJ-45 1 external 1 x 10/100 Mbps
Ethernet (cop-
per)
IP20 6GK5761-1FC00-0AA0
6GK5761-1FC00-0AB0 (1)
SCALANCE W722-1 RJ-45 1 external 1 x 10/100 Mbps
Ethernet (cop-
per)
IP20 6GK5722-1FC00-0AA0
6GK5722-1FC00-0AB0 (1)
SCALANCE W721-1 RJ-45 1 external 1 x 10/100 Mbps
Ethernet (cop-
per)
IP20 6GK5721-1FC00-0AA0
6GK5721-1FC00-0AB0 (1)
(1) US variant
2.4
IEEE 802.11n
Overview
The standard IEEE 802.11n is an expansion of the 802.11 standard and was approved in
2009.
Previous standards worked either in the 2.4 GHz frequency band (IEEE 802.11g /b) or in the
5 GHz frequency band (IEEE 802.11a). IEEE 802.11n can operate in both frequency band.
In the IEEE 802.11n standard, there are mechanisms implemented in PHY and MAC layers
that increase the data throughput and improve the wireless coverage.
●MIMO antenna technology
●Maximum ratio combining (MRC)
●Spatial multiplexing
●Channel bonding
●Frame aggregation
●Accelerated guard interval
●Modulation and coding scheme
●Data throughput rates up to 450 Mbps (gross)
This is not possible on all devices.

Description
2.4 IEEE 802.11n
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03 19
MIMO antenna technology
MIMO (Multiple Input - Multiple Output) is based on an intelligent multiple antenna system.
The transmitter and the receiver have several spatially separate antennas. The spatially
separate antennas transmit the data streams at the same time. Up to four data streams are
possible. The data streams are transmitted over spatially separate paths and return over
different paths due to diffraction, refraction, fading and reflection (multipath propagation).
The multipath propagation means that at the point of reception a complex, space- and time-
dependent pattern results as a total signal made up of the individual signals sent. MIMO
uses this unique pattern by detecting the spatial position of characteristic signals. Here, each
spatial position is different from the neighboring position. By characterizing the individual
senders, the recipient is capable of separating several signals from each other.
Maximum ratio combining (MRC)
In a multiple antenna system, the wireless signals are received by the individual antennas
and combined to form one signal. The MRC method is used to combine the wireless signals.
The MRC method weights the wireless signals according to their signal-to-noise ratio and
combines the wireless signals to form one signal. The signal-to-noise ratio is improved and
the error rate is reduced.
Spatial mutliplexing
With spatial multiplexing, different information is sent using the same frequency. The data
stream is distributed over n transmitting antennas; in other words, each antenna sends only
1/n of the data stream. The division of the data stream is restricted by the number of
antennas. At the receiver end, the signal is reconstructed.
Due to the spatial multiplexing, there is a higher signal-to-noise ratio and a higher data
throughput.

Description
2.4 IEEE 802.11n
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
20 Configuration Manual, 11/2014, C79000-G8976-C350-03
Channel bonding
With IEEE 802.11n, data can be transferred via two directly neighboring channels. The two
20 MHz channels are put together to form one channel with 40 MHz. This allows the channel
bandwidth to be doubled and the data throughput to be increased.
To be able to use channel bonding, the recipient must support 40 MHz transmissions. If the
recipient does not support 40 MHz transmissions, the band is automatically reduced to 20
MHz. This means that IEEE 802.11n can also communicate with IEEE 802.11a/b/g devices.
The channel bonding is set on the "AP" WBM page with the "HT Channel Width [MHz]"
parameter.
Frame aggregation
With IEEE 802.11n, it is possible to group together individual data packets to form a single
larger packet; this is known as frame aggregation. There are two types of frame aggregation:
Aggregated MAC Protocol Data Unit (A-MPDU) and Aggregated MAC Service Data Unit (A-
MSDU).
The frame aggregation reduces the packet overheads. Frame aggregation can only be used
if the individual data packets are intended for the same receiving station (client).
The W700 devices support both types of frame aggregation. You specify the settings for the
A-MPDU data packet on the "AP 802.11n" WBM page.
Accelerated guard interval
The guard interval prevents different transmissions being mixed together. In
telecommunications, this mixing is also known as intersymbol interference (ISI).
When the send time has elapsed, a send pause (guard interval) must be kept to before the
next transmission begins.
The guard interval of IEEE 802.11a /b/g is 800 ns. IEEE 802.11n can use the reduced guard
interval of 400 ns. You specify the guard interval on the "AP 802.11n" WBM page.