Siemens SIMATIC Mobile Panel 277 IWLAN User guide

Applications & Tools
Answers for industry.
Deckblatt
Evaluate Through which Access Point
the Mobile Panel Communicates
Mobile Panel 277 IWLAN V2 / 277F IWLAN V2
Application Description May 2011

2 Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495
Copyright Siemens AG 2011 All rights reserved
Industry Automation and Drive Technologies Service & Support Portal
This article is taken from the Service Portal of Siemens AG, Industry Automation
and Drives Technologies. The following link takes you directly to the download
page of this document.
http://support.automation.siemens.com/WW/view/en/48946495
If you have any questions about this document, please contact us at the following
e-mail address:
[e-mail]

Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495 3
Copyright Siemens AG 2011 All rights reserved
s
SIMATIC
Evaluating An Access Point Clients
List
Mobile Panel 277 IWLAN / 277F IWLAN
Automation Task
1
Automation Solution
2
Basics
3
Functional Mechanisms
of this Application
4
Configuration
5
Startup of the Application
6
Notes, Tips and Tricks
7
Links & Literature
8
History
9

Table of contents
4 Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495
Copyright Siemens AG 2011 All rights reserved
Warranty and Liability
Note The application examples are not binding and do not claim to be complete
regarding configuration, equipment and any eventuality. The application
examples do not represent customer-specific solutions. They are only intended
to provide support for typical applications. You are responsible for ensuring that
the described products are used correctly. These application examples do not
relieve you of the responsibility to use sound practices in application, installation,
operation and maintenance. When using these Application Examples, you
recognize that we cannot be made liable for any damage/claims beyond the
liability clause described. We reserve the right to make changes to these
Application Examples at any time without prior notice. If there are any deviations
between the recommendations provided in this application example and other
Siemens publications – e.g. Catalogs – the contents of the other documents
have priority.
We accept no liability for information contained in this document.
Any claims against us – based on whatever legal reason – resulting from the use of
the examples, information, programs, engineering and performance data etc.,
described in this Application Example shall be excluded. Such an exclusion shall
not apply in the case of mandatory liability, e.g. under the German Product Liability
Act (“Produkthaftungsgesetz”), in case of intent, gross negligence, or injury of life,
body or health, guarantee for the quality of a product, fraudulent concealment of a
deficiency or breach of a condition which goes to the root of the contract
(“wesentliche Vertragspflichten”). However, claims arising from a breach of a
condition which goes to the root of the contract shall be limited to the foreseeable
damage which is intrinsic to the contract, unless caused by intent or gross
negligence or based on mandatory liability for injury of life, body or health. The
above provisions do not imply a change in the burden of proof to your detriment.
It is not permissible to transfer or copy these Application Examples or excerpts
thereof without express authorization from Siemens Industry Sector.

Table of contents
Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495 5
Copyright Siemens AG 2011 All rights reserved
Table of contents
Warranty and Liability ................................................................................................. 4
1Automation Task................................................................................................ 7
1.1 Introduction........................................................................................... 7
1.2 Overview of the automation task.......................................................... 7
1.3 Requirements of the automation task .................................................. 8
2Automation Solution ......................................................................................... 9
2.1 Overview of overall solution ................................................................. 9
2.2 Description of the core functionality ................................................... 10
2.3 Sequence of the core functionality ..................................................... 12
2.4 Overview and description of the user interface.................................. 13
2.4.1 STEP 7 configuration ......................................................................... 13
2.4.2 WinCC flexible configuration .............................................................. 16
2.5 Hardware and software components used......................................... 17
3Basics ............................................................................................................... 19
3.1 MIB browser ....................................................................................... 19
3.2 SNMP ................................................................................................. 19
3.3 MIB – Management Information Base................................................ 20
4Functional Mechanisms of this Application ................................................. 21
4.1 FB3 “GetRequest” functionality .......................................................... 21
4.2 FC220 functionality............................................................................. 24
4.3 Configuration explanations................................................................. 27
4.3.1 FB3 in connection with the DB15 ....................................................... 27
4.3.2 Resetting MIB variables ..................................................................... 28
4.3.3 DB20, MIB library ............................................................................... 29
5Configuration Process .................................................................................... 31
5.1 Preparatory measures for the configuration....................................... 31
5.1.1 IP addresses ...................................................................................... 31
5.1.2 Addresses, parameters and passwords used.................................... 31
5.2 STEP 7 configuration ......................................................................... 32
5.2.1 Hardware settings .............................................................................. 32
5.2.2 Configuring the network, UDP connection ......................................... 36
5.2.3 S7 program......................................................................................... 40
5.3 WinCC flexible configuration .............................................................. 52
5.3.1 Hardware configuration: ..................................................................... 52
5.3.2 WinCC flexible configuration .............................................................. 52
5.4 Access point configuration ................................................................. 54
6Startup of the Application............................................................................... 55
6.1 Preparing measures ........................................................................... 55
6.2 Commissioning................................................................................... 56
7Notes, Tips and Tricks .................................................................................... 57
7.1 Application Description....................................................................... 57
7.2 Downloading MIB library from the access point................................. 57
7.3 Hardware used ................................................................................... 58
7.3.1 Changing CPU ................................................................................... 58
7.3.2 Evaluating clients list .......................................................................... 58
7.4 MAC addresses are not detected....................................................... 58
8Links & Literature ............................................................................................ 59
8.1 Bibliographic references..................................................................... 59

Table of contents
6 Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495
Copyright Siemens AG 2011 All rights reserved
8.2 Internet link specifications .................................................................. 59
9History............................................................................................................... 59

1 Automation Task
1.1 Introduction
Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495 7
Copyright Siemens AG 2011 All rights reserved
1 Automation Task
1.1 Introduction
The application is especially tailored for the mobile panel 277F IWLAN. However,
the functionality can also be used for the Mobile Panel 277 IWLAN or for devices
that are displayed through the clients list of an access point.
The application is based on the “Configuration and Use of the Mobile Panel 277F
IWLAN” application description (link). This is where the individual configuration
steps for creating a Mobile Panel 277F IWLAN project have already been
described.
The aim of this application is to read the clients list from an access point, to detect
with what access point the mobile panel is connected.
Notes Whenever the mobile panel is mentioned in this document it relates to the Mobile
Panel 277F IWLAN V2.
Whenever the standard configuration for the mobile panel is discussed, it always
relates to the configuration from the
“Configuration and Use of the Mobile Panel 277F IWLAN” which you can download
under the following entry ID 25702331.
1.2 Overview of the automation task
The figure below provides an overview of the automation task.
The figure shows a part of the plant with various stations. Each station is assigned
an access point. The individual stations can be operated and monitored through
several Mobile Panel 277F IWLAN.
Figure 1-1
Reception area
Access Point 1“
Mobile Panel 277F IWLAN
Reception area
Access Point 2“
Reception area
Access Point 3“

1Automation Task
1.3 Requirements of the automation task
8 Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495
Copyright Siemens AG 2011 All rights reserved
Description of the automation task
A large plant consists of three stations via which the packets are transported on
conveyor belts.
Each station has its own access point.
Through one or several mobile panels the individual stations
can be operated and monitored.
Smooth and secure operation of the individual stations through the mobile panels
has to be guaranteed.
The control program is to evaluate with which
access point the mobile panel is currently connected.
1.3 Requirements of the automation task
Requirements of the automation task
Standard communication
PROFIsafe communication via WLAN
uninterrupted roaming to other access points (iPCF-MC)
Requirements for the HMI:
The complete operation of the plant is performed via the HMI operator panels.
Requirements for the communication:
communication via WLAN
uninterrupted roaming to other access points (iPCF-MC)

2 Automation Solution
2.1 Overview of overall solution
Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495 9
Copyright Siemens AG 2011 All rights reserved
2 Automation Solution
2.1 Overview of overall solution
Schematic layout
The following figure gives a schematic overview of the most important components
of the solution:
S7-319F-3PN/DP
CP343-1
Access Points W788-2RR
Switch X208
Mobile Panel 277F IWLAN V2
Figure 2-1
Mobile Panel 277F IWLAN V2
319F-3PN/DP
)
)
)
)
)
)
)
)
)
)
)
)
Industrial Ethernet
Industrial
Wireless LAN
SCALANCE
Switch X208
W788 -2RR
W788 -2RR
)
)
)
)
)
)
Access Point 1 Access Point x
W788 -2RR
)
)
)
)
)
)
Access Point 2
CP 343-1
Classification
For a better overview, the application will only give information necessary for the
reproduction of this application.
Where necessary, the document provides references to related links and manuals.
This application does not include information on the following topics:
–“Safety Notes and Standards”
–“Directives and Approvals”
–“Operational Safety”, etc.
For these topics, please refer to the “Operating Manual” for the Mobile Panel 277F
IWLAN V2 (Link).

2Automation Solution
2.2 Description of the core functionality
10 Evaluating An Access Point Clients List
V1.0, Entry ID: 48946495
Copyright Siemens AG 2011 All rights reserved
This application does not include a description of the SIMATIC WinCC flexible
engineering tool.
It only describes the settings of the used hardware and software components
that are necessary for the application.
Basic knowledge of the above-listed topics is assumed. For detailed information,
please refer to the associated manuals.
The application comes with a standard configuration for the mobile panel.
The “standard configuration” includes a minimum configuration. This enables you
to integrate the mobile panel into a secure IWLAN connection.
The standard configuration does not include an F program to evaluate the safety-
related functions, for example, the evaluation of the emergency stop button on the
mobile panel. If you need a sample configuration regarding this issue, please look
at the application configuration of the
Mobile Panel 277F IWLAN V2.
Required knowledge
Basic knowledge of the “Configuration and Use of the Mobile Panel 277F IWLAN”
application description is assumed.
2.2 Description of the core functionality
The core of this application is the evaluation of the “Clients list” of one or several
access points.
The screen below shows the “web interface” of “SCALANCE W788-2RR”. Under
the “Information > Clients list” parameter, all “Associated Stations” are listed. Each
“MAC address” of the connected device is shown.
Figure 2-2