Siemens SIMATIC NET SCALANCE W780 Series Instruction sheet

SCALANCE W780/W740 to IEEE
802.11n Web Based Management
___________________
___________________
___________________
___________________
___________________
___________________
___________________
___________________
___________________
___________________
___________________
SIMATIC NET
Industrial Wireless LAN
SCALANCE W780/W740 to IEEE
802.11n Web Based Management
Configuration Manual
03/2015
C79000
-G8976-C267-08
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
Global Services Information Technology
80200 MÜNCHEN
GERMANY
C79000-G8976-C267-08
Ⓟ
03/2015 Subject to change
Copyright © Siemens AG 2011 - 2015.
All rights reserved
Legal information
Warning notice system
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 W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 3
Table of contents
1 Introduction................................................................................................................................................ 9
1.1 Information on the Configuration Manual .................................................................................9
1.2 Type designations...................................................................................................................13
1.3 Structure of the type designation............................................................................................14
2 Description............................................................................................................................................... 15
2.1 Network structures..................................................................................................................15
2.2 Possible applications of SCALANCE W700 devices ..............................................................19
2.3 Product characteristics ...........................................................................................................21
2.4 IEEE 802.11n..........................................................................................................................24
2.5 Requirements for installation and operation of SCALANCE W700 devices...........................28
2.6 C-PLUG and KEY-PLUG ........................................................................................................29
2.7 Digital input / output ................................................................................................................31
2.8 Power over Ethernet (PoE).....................................................................................................33
3 Technical basics ...................................................................................................................................... 37
3.1 VLAN.......................................................................................................................................37
3.2 MAC-based communication....................................................................................................38
3.3 iPCF / iPCF-MC ......................................................................................................................39
3.4 iREF ........................................................................................................................................42
3.5 AeroScout ...............................................................................................................................44
3.6 NAT/NAPT ..............................................................................................................................46
3.7 SNMP......................................................................................................................................47
3.8 Spanning Tree ........................................................................................................................49
3.8.1 RSTP, MSTP, CIST ................................................................................................................50
4 Assignment of an IP address................................................................................................................... 53
4.1 Structure of an IP address ......................................................................................................53
4.2 Initial assignment of an IP address.........................................................................................55
4.3 Address assignment with DHCP.............................................................................................56
4.4 Address assignment with the Primary Setup Tool..................................................................57
4.5 Address assignment with STEP 7 ..........................................................................................58

Table of contents
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
4Configuration Manual, 03/2015, C79000-G8976-C267-08
5 Configuring with Web Based Management.............................................................................................. 59
5.1 Web Based Management ...................................................................................................... 59
5.2 Login ...................................................................................................................................... 61
5.3 "Wizard" menu ....................................................................................................................... 64
5.3.1 Basic Wizard .......................................................................................................................... 64
5.3.1.1 System Settings ..................................................................................................................... 65
5.3.1.2 Country Settings..................................................................................................................... 67
5.3.1.3 IP Address Settings ............................................................................................................... 68
5.3.1.4 Management Interfaces ......................................................................................................... 69
5.3.1.5 Antenna Settings.................................................................................................................... 70
5.3.1.6 Radio Settings........................................................................................................................ 72
5.3.1.7 Access Point Settings ............................................................................................................ 74
5.3.1.8 Client Settings........................................................................................................................ 76
5.3.1.9 Client Allowed Channel Settings............................................................................................ 78
5.3.1.10 Security Settings .................................................................................................................... 80
5.3.1.11 Dot1x Supplicant Settings...................................................................................................... 83
5.3.1.12 Dot1x RADIUS Server Settings ............................................................................................. 84
5.3.1.13 Summary of Settings.............................................................................................................. 85
5.4 "Information" menu................................................................................................................. 86
5.4.1 Start Page .............................................................................................................................. 86
5.4.2 Versions ................................................................................................................................. 91
5.4.3 I&M......................................................................................................................................... 92
5.4.4 ARP Table.............................................................................................................................. 94
5.4.5 Log Tables ............................................................................................................................. 95
5.4.5.1 Events .................................................................................................................................... 95
5.4.5.2 WLAN Authentication Log...................................................................................................... 97
5.4.6 Faults ..................................................................................................................................... 99
5.4.7 Redundancy......................................................................................................................... 100
5.4.8 Ethernet Statistics ................................................................................................................ 104
5.4.8.1 Interface statistics ................................................................................................................ 104
5.4.8.2 Packet Size .......................................................................................................................... 105
5.4.8.3 Packet Type ......................................................................................................................... 106
5.4.8.4 Packet Error ......................................................................................................................... 107
5.4.9 Learning Table ..................................................................................................................... 108
5.4.10 DHCP Server ....................................................................................................................... 110
5.4.11 WLAN................................................................................................................................... 111
5.4.11.1 Overview AP ........................................................................................................................ 111
5.4.11.2 Client List ............................................................................................................................. 113
5.4.11.3 WDS List .............................................................................................................................. 115
5.4.11.4 Overlap AP........................................................................................................................... 116
5.4.11.5 Overview Client.................................................................................................................... 118
5.4.11.6 Available AP......................................................................................................................... 120
5.4.11.7 IP Mapping Table................................................................................................................. 121
5.4.12 WLAN Statistics ................................................................................................................... 123
5.4.12.1 Errors ................................................................................................................................... 123
5.4.12.2 Management Sent................................................................................................................ 125
5.4.12.3 Management Received ........................................................................................................ 127
5.4.12.4 Data Sent ............................................................................................................................. 129
5.4.12.5 Data Received...................................................................................................................... 131
5.4.13 WLAN iFeatures................................................................................................................... 132

Table of contents
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 5
5.4.13.1 iREF Client List .....................................................................................................................132
5.4.13.2 iREF WDS List......................................................................................................................134
5.4.13.3 AeroScout .............................................................................................................................135
5.4.14 Security .................................................................................................................................137
5.4.14.1 Inter AP blocking...................................................................................................................137
5.5 "System" menu .....................................................................................................................138
5.5.1 System Configuration............................................................................................................138
5.5.2 General .................................................................................................................................141
5.5.2.1 Device ...................................................................................................................................141
5.5.2.2 Coordinates...........................................................................................................................142
5.5.3 Agent IP ................................................................................................................................144
5.5.4 DNS Client ............................................................................................................................146
5.5.5 Restart ..................................................................................................................................148
5.5.6 Commit Control.....................................................................................................................150
5.5.7 Load&Save ...........................................................................................................................151
5.5.7.1 HTTP.....................................................................................................................................153
5.5.7.2 TFTP .....................................................................................................................................156
5.5.7.3 Passwords ............................................................................................................................158
5.5.8 Events ...................................................................................................................................160
5.5.8.1 Configuration.........................................................................................................................160
5.5.8.2 Severity Filter ........................................................................................................................163
5.5.9 SMTP Client..........................................................................................................................164
5.5.10 DHCP....................................................................................................................................
166
5.5.10.1 DHCP Client..........................................................................................................................166
5.5.10.2 DHCP Server ........................................................................................................................168
5.5.10.3 DHCP Options ......................................................................................................................170
5.5.10.4 Static Leases ........................................................................................................................172
5.5.11 SNMP....................................................................................................................................173
5.5.11.1 General .................................................................................................................................173
5.5.11.2 Traps.....................................................................................................................................175
5.5.11.3 v3 Groups .............................................................................................................................176
5.5.11.4 v3 Users................................................................................................................................179
5.5.12 System Time .........................................................................................................................181
5.5.12.1 Manual Setting......................................................................................................................181
5.5.12.2 DST Overview.......................................................................................................................183
5.5.12.3 DST Configuration ................................................................................................................185
5.5.12.4 SNTP Client ..........................................................................................................................189
5.5.12.5 NTP Client.............................................................................................................................192
5.5.12.6 SIMATIC Time Client ............................................................................................................194
5.5.13 Auto Logout...........................................................................................................................195
5.5.14 Syslog Client.........................................................................................................................196
5.5.15 Fault Monitoring ....................................................................................................................198
5.5.15.1 Power Supply........................................................................................................................198
5.5.15.2 Link Change..........................................................................................................................200
5.5.16 PNIO .....................................................................................................................................201
5.5.17 PLUG ....................................................................................................................................203
5.5.17.1 Configuration.........................................................................................................................203
5.5.17.2 License..................................................................................................................................206
5.5.18 Ping.......................................................................................................................................209
5.6 "Interfaces" menu..................................................................................................................210
5.6.1 Ethernet ................................................................................................................................210

Table of contents
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
6Configuration Manual, 03/2015, C79000-G8976-C267-08
5.6.1.1 Overview .............................................................................................................................. 210
5.6.1.2 Configuration........................................................................................................................ 211
5.6.2 WLAN................................................................................................................................... 214
5.6.2.1 Basic .................................................................................................................................... 214
5.6.2.2 Advanced ............................................................................................................................. 218
5.6.2.3 Antennas.............................................................................................................................. 220
5.6.2.4 Allowed Channels ................................................................................................................ 223
5.6.2.5 802.11n ................................................................................................................................ 225
5.6.2.6 AP ........................................................................................................................................ 227
5.6.2.7 AP WDS ............................................................................................................................... 230
5.6.2.8 AP 802.11a/b/g Rates.......................................................................................................... 232
5.6.2.9 AP 802.11n Rates................................................................................................................ 235
5.6.2.10 Client.................................................................................................................................... 237
5.6.2.11 Signal Recorder ................................................................................................................... 240
5.7 "Layer 2" menu..................................................................................................................... 245
5.7.1 VLAN.................................................................................................................................... 245
5.7.1.1 General ................................................................................................................................ 245
5.7.1.2 Port-based VLAN ................................................................................................................. 248
5.7.2 Dynamic MAC Aging............................................................................................................ 250
5.7.3 Spanning Tree...................................................................................................................... 251
5.7.3.1 General ................................................................................................................................ 251
5.7.3.2 CIST general........................................................................................................................ 253
5.7.3.3 CIST port.............................................................................................................................. 255
5.7.3.4 MST general......................................................................................................................... 259
5.7.3.5 MST Port .............................................................................................................................. 260
5.7.4 DCP Forwarding................................................................................................................... 263
5.7.5 LLDP .................................................................................................................................... 264
5.8 "Layer 3" menu..................................................................................................................... 266
5.8.1 NAT ...................................................................................................................................... 266
5.8.1.1 Basic .................................................................................................................................... 266
5.8.1.2 NAPT.................................................................................................................................... 268
5.9 "Security" menu.................................................................................................................... 270
5.9.1 Passwords............................................................................................................................ 270
5.9.2 WLAN................................................................................................................................... 271
5.9.2.1 Basic .................................................................................................................................... 271
5.9.2.2 AP Communication .............................................................................................................. 275
5.9.2.3 AP Radius Authenticator...................................................................................................... 277
5.9.2.4 Client Radius Supplicant...................................................................................................... 279
5.9.2.5 Keys ..................................................................................................................................... 280
5.9.3 Management ACL ................................................................................................................ 281
5.9.4 Inter AP blocking.................................................................................................................. 284
5.9.4.1 Basic .................................................................................................................................... 284
5.9.4.2 Allowed addresses............................................................................................................... 285
5.10 "iFeatures" menu.................................................................................................................. 287
5.10.1 iPCF ..................................................................................................................................... 287
5.10.2 iPCF-MC .............................................................................................................................. 290
5.10.3 iREF ..................................................................................................................................... 292
5.10.4 AeroScout ............................................................................................................................ 294

Table of contents
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 7
6 Upkeep and maintenance...................................................................................................................... 295
6.1 Firmware update - via WBM .................................................................................................295
6.2 Restoring the default parameter settings..............................................................................296
7 Troubleshooting/FAQ............................................................................................................................. 297
7.1 Firmware update via WBM or CLI not possible ....................................................................297
7.2 Disrupted data transmission due to the received power being too high...............................299
7.3 Compatibility with predecessor products ..............................................................................300
7.4 Instructions for secure network design .................................................................................301
A Appendix A ............................................................................................................................................ 303
A.1 MIB files supported by SCALANCE W700 ...........................................................................303
B Appendix B ............................................................................................................................................ 305
B.1 Private MIB variables of the SCALANCE W700...................................................................305
C Appendix C............................................................................................................................................ 307
C.1 Underlying standards............................................................................................................307
D Appendix D............................................................................................................................................ 309
D.1 Messages in the event log ....................................................................................................309
D.2 Messages in the WLAN authentication log...........................................................................314
Index...................................................................................................................................................... 315

Table of contents
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
8Configuration Manual, 03/2015, C79000-G8976-C267-08

SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 9
Introduction
1
1.1
Information on the Configuration Manual
Validity of the configuration manual
This Configuration Manual covers the following products:
●SCALANCE W748-1 M12
●SCALANCE W748-1 RJ-45
●SCALANCE W788-1 M12
●SCALANCE W788-2 M12
●SCALANCE W788-2 M12 EEC
●SCALANCE W788-1 RJ-45
●SCALANCE W788-2 RJ-45
●SCALANCE W786-1 RJ-45
●SCALANCE W786-2 RJ-45
●SCALANCE W786-2IA RJ-45
●SCALANCE W786-2 SFP
This Configuration Manual applies to the following software version:
●SCALANCE W700 firmware as of version V 5.1
Note
This configuration manual does not apply to the SCALANCE W7xC
-2.
Purpose of the Configuration Manual
This Configuration Manual is intended to provide you with the information you require to
install, commission and operate devices correctly. It explains how to configure the devices
and how to integrate them in a WLAN network.
How you install and connect up the device correctly is described in the operating instructions
of the device.

Introduction
1.1 Information on the Configuration Manual
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
10 Configuration Manual, 03/2015, C79000-G8976-C267-08
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 W780/W740 Command Line Interface
This document contains the CLI commands that are supported by SCALANCE W700
devices.
●Performance data 802.11abgn PCIe Minicard MPCIE-R1-ABGN-U3
This document contains information about the frequency, modulation, transmit power and
receiver sensitivity of the wireless card.
●SCALANCE W788-x / W748-1 Operating Instructions
This document contains information on installing and connecting up the following
products and their approvals:
–SCALANCE W788-1 RJ-45
–SCALANCE W788-1 M12
–SCALANCE W788-2 RJ-45
–SCALANCE W788-2 M12
–SCALANCE W788-2 M12 EEC
–SCALANCE W748-1 RJ-45
–SCALANCE W748-1 M12
●SCALANCE W786 Operating Instructions
This document contains information on installing and connecting up the following
products and their approvals:
–SCALANCE W786-1 RJ-45
–SCALANCE W786-2 RJ-45
–SCALANCE W786-2IA RJ-45
–SCALANCE W786-2 SFP
●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).

Introduction
1.1 Information on the Configuration Manual
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 11
●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
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)

Introduction
1.1 Information on the Configuration Manual
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
12 Configuration Manual, 03/2015, C79000-G8976-C267-08
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"
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 communications 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)
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. For more information about industrial security, visit
http://www.siemens.com/industrialsecurity.
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. For more information, visit http://support.automation.siemens.com.

Introduction
1.2 Type designations
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 13
1.2
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
Clients (IP30 and IP65) W748-1 SCALANCE W748-1 RJ-45
SCALANCE W748-1 M12
Access points (IP30 and IP65) W788-x SCALANCE W788-1 M12
SCALANCE W788-2 M12
SCALANCE W788-2 M12 EEC
SCALANCE W788-1 RJ-45
SCALANCE W788-2 RJ-45
Access points (IP65) W786-x SCALANCE W786-1 RJ-45
SCALANCE W786-2 RJ-45
SCALANCE W786-2IA RJ-45
SCALANCE W786-2 SFP
All SCALANCE W access points W78x SCALANCE W788-1 M12
SCALANCE W788-2 M12
SCALANCE W788-2 M12 EEC
SCALANCE W788-1 RJ-45
SCALANCE W788-2 RJ-45
SCALANCE W786-1 RJ-45
SCALANCE W786-2 RJ-45
SCALANCE W786-2IA RJ-45
SCALANCE W786-2 SFP
SCALANCE W without W786-x W7x8 SCALANCE W788-1 RJ-45
SCALANCE W788-1 M12
SCALANCE W788-2 RJ-45
SCALANCE W788-2 M12
SCALANCE W748-1 RJ-45
SCALANCE W748-1 M12
All SCALANCE W devices W700 SCALANCE W748-1 M12
SCALANCE W748-1 M12
SCALANCE W788-1 M12
SCALANCE W788-2 M12
SCALANCE W788-2 M12 EEC
SCALANCE W788-1 RJ-45
SCALANCE W788-2 RJ-45
SCALANCE W786-1 RJ-45
SCALANCE W786-2 RJ-45
SCALANCE W786-2IA RJ-45
SCALANCE W786-2 SFP

Introduction
1.3 Structure of the type designation
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
14 Configuration Manual, 03/2015, C79000-G8976-C267-08
1.3
Structure of the type designation
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 W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 15
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
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
16 Configuration Manual, 03/2015, C79000-G8976-C267-08
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
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 17
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
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.

Description
2.1 Network structures
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
18 Configuration Manual, 03/2015, C79000-G8976-C267-08
Figure 2-4 Implementation of WDS with four access points
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.

Description
2.2 Possible applications of SCALANCE W700 devices
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08 19
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 W788
The SCALANCE W788 is equipped with an Ethernet interface and one or two WLAN
interfaces. This makes the device suitable for the following applications:
●The SCALANCE W788 forwards data within its transmission range from one node to
another without a connection to wired Ethernet being necessary.
●The SCALANCE W788 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W788 can be used as a wireless bridge between two networks.
●The SCALANCE W788 can be used as a bridge between two different frequencies.
●The SCALANCE W788 supports the protection class IP65 and the protection class IP30.
The access points are available in two versions:
–M12 for degree of protection IP65
–RJ-45 for the degree of protection IP30
With a SCALANCE W788 with two WLAN interfaces, you can also implement a redundant
wireless connection to a SCALANCE W78x with two WLAN interfaces.
Possible applications of the SCALANCE W786
The SCALANCE W786 is equipped with up to two Ethernet interfaces and up to two WLAN
interfaces. This makes the device suitable for the following applications:
●Due to its extended temperature range, the SCALANCE W786 can be recommended in
particular for outdoor applications.
●The SCALANCE W786 forwards data within its transmission range from one node to
another without a connection to wired Ethernet being necessary.
●The SCALANCE W786 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W786 can be used as a wireless bridge between two networks.
●The SCALANCE W786 can be used as a bridge between two cells operating at different
frequencies.
With a SCALANCE W786 with more than one WLAN interface, you can also implement a
redundant wireless connection to a SCALANCE W78x with a maximum of two WLAN
interfaces.

Description
2.2 Possible applications of SCALANCE W700 devices
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
20 Configuration Manual, 03/2015, C79000-G8976-C267-08
Possible applications of the SCALANCE W748
The SCALANCE W748 is equipped with an Ethernet interface and a WLAN interface. This
makes the device suitable for the following applications:
●The SCALANCE W748 forwards data within its transmission range from one node to
another without a connection to wired Ethernet being necessary.
●The SCALANCE W748 can be used as a gateway from a wired to a wireless network.
●The SCALANCE W748 can be used as a wireless bridge between two networks.
The device can also connect up to 8 stations with IP communication on the Ethernet port to a
wireless cell.