Description
Priority is assigned to PROFINET real-time messages in accordance with standard IEEE 802.1Q. The VLAN ID=0 with VLAN priority 6 is used for this. The general procedure for assigning priority is described in the standard IEEE 802.1P.

Fig. 01

In order for the PROFINET real-time communication to be possible also in a Virtual Local Area Network (VLAN) and thus also over switches that can evaluate the VLAN tag, the switches must support the following:

1. PROFINET real-time messages with Ethernet type = 0x8892 must be accepted and forwarded. 
2. PROFINET real-time messages with VLAN ID=0 must be accepted by the switch and tagged with the prioritization by the configuration in the switch in a separate VLAN x.

Fig. 02

The VLAN ID=0 of the PROFINET real-time message must be set by Switch 1 to any VLAN ID (tagged VLAN), for example VLAN ID=2. This permits the priority still to be taken into account. In this way the switches can continue to recognize the PROFINET real-time messages as prioritized.

The last switch that forwards the PROFINET real-time message to a terminal node or other IO device can remove the VLAN tag from the PROFINET real-time message before forwarding to the target port (untagged VLAN). All these settings have to be configured in each switch.

Note
In this example the VLAN ID=2 is used for PROFINET real-time communication. Any VLAN ID can be used for your own VLAN for PROFINET real-time communication.
The priority is set with the VLAN so that the PROFINET real-time message is handled with priority.

The SCALANCE products below can evaluate the VLAN tag so that it can be used in a VLAN with PROFINET real-time communication:

• Industrial Ethernet switches SCALANCE X-300 and SCALANCE X-400
  More information about configuring the VLANs in SCALANCE X-300 and SCALANCE X-400 is available in the manual in Entry ID: 19625108.
• SCALANCE W Access Points and Client Modules
  More information about configuring the VLAN in SCALANCE W is available in the manual in Entry ID: 42784493.

Additional Keywords
Virtual Local Area Network, SCALANCE

Description
The IWLAN/PB Link PN IO and the SCALANCE W Client Modules are operated as clients at the SCALANCE W Access Point.

The SCALANCE W Access Points and Client Modules are configured via the Web Based Management or the Command Line Interface (CLI).
The configuration wizards below are available in the Web Based Management of a SCALANCE W Access Point and Client Module :

• Basic Wizard
• Security Wizard

In the Web Based Management of the SCALANCE W Client Module the iPCF Wizard is also available for configuring.

If you do not use a PRESET PLUG for parameterizing the IWLAN/PB Link PN IO, then log on to the IWLAN/PB Link via Telnet. Parameterize the IWLAN/PB Link PN IO via the Command Line Interface (CLI) so that the device can be commissioned in the operational environment in which the configuration was also downloaded.

The table below shows the commands that you enter in the Command Line Interface (CLI) for parameterizing the IWLAN/PB Link PN IO compared with the settings that you make in the Web Based Management for parameterizing a SCALANCE W Client Module.

NET_ParameterCorrelatio_IWLAN_PB_Link_SCALANCE_W_en.pdf ( 108 KB )

The table below gives you an example of how to parameterize the IWLAN/BP Link PN IO the Command Line Interface (CLI) using the Telnet protocol.

NET_configuration_example_en.pdf ( 14 KB )

Additional information

• More information about configuring the IWLAN/PB Link PN IO without PRESET PLUG is available in the manual in Entry ID: 21379908.
• More information about configuring the SCALANCE W Access Points is available in the manual in Entry ID: 42784493.

Description:
The SIMATIC NET Quick Start Collection provides simple sample programs designed to help when starting to configure plants with SIMATIC NET products.

The following links take you to the SIMATIC NET Quick Start Collection. There you find sample programs and documentation for PROFINET IO, i.e. for communication between an IO controller and an IO device or DP slave IWLAN components.

• IWLAN wireless data communication
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/iwlan/drahtlos_daten.htm
  IWLAN SNMP diagnostics
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/iwlan/snmp_diagnose.htm

Here you will find sample S7 programs and documentation for the following SIMATIC NET products:

• IE CPs for S7-300 and S7-400
• SCALANCE W, e.g. SCALANCE W788-1PRO, SCALANCE W744-1PRO
• Gateway like IWLAN/PB Link PN IO

Keywords:
PROFINET IO device, PROFINET IO controller, CP343-1, CP443-1

Description:
The SIMATIC NET Quick Start Collection provides simple sample programs designed to help when starting to configure plants with SIMATIC NET products.

The following links take you to the SIMATIC NET Quick Start Collection. There you will find sample programs and documentation for communication via Industrial Ethernet using the following protocols:

• ISO protocol:
  Communication via ISO protocol with SIMATIC components
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/ethernet/ie_iso.htm
• TCP/IP protocol:
  Secure communication via TCP/IP with RFC1006 and TCP native with SIMATIC components
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/ethernet/ie_tcp.htm
• UDP protocol:
  Non-secure communication via UDP with SIMATIC components
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/ethernet/ie_udp.htm
• HTML (Hypertext Markup Language) and FTP (File Transfer Protocol):
  Process control and file transfer
  http://www.automation.siemens.com/net-static/Quickstart2009/quickstart012003/html_76/ethernet/ie_html_ftp.htm

Here you will find sample S7 programs and documentation for the following SIMATIC NET products:

• IE CP for S7-300, S7-400 and S7-200
• IE PC CPs, e.g. CP1512, CP1612, CP1613
• IWLAN with SCALANCE W products like SCALANCE W788-1PRO and SCALANCE W744-1 PRO

Keywords:
S7 Communication, Send/Receive, Connection configuration, ISO-on-TCP, TCP, ISO Transport, PUT, GET, BSEND, BRECV, USEND, URECV, AG_SEND, AG_RECV

Description:
The document below contains an overview and description of the options for using a C-PLUG and PRESET-PLUG with the Industrial Wireless LAN products:

• SCALANCE W
• IWLAN/PB Link PNIO

Usage_of_CPLUG_e.pdf ( 673 KB )

Keywords:
Access point, Client module

Configuration note:
The C-PLUG (configuration plug) is an interchangeable medium on which the configuration data of a device is automatically saved. This enables you to exchange a defective module simply by replugging the C-PLUG to a new module.

The following devices support the use of a C-PLUG:
 

Module	WBM	PRESET PLUG	Manual	Product-specific
IE/PB Link PN IO			19299692	Only the device name is saved permanently in the C-PLUG when it is used as a PROFINET IO device. The configuration data is transferred from the PROFINET IO controller at every new power-up and temporarily stored in the memory. The formatting of the C-PLUG takes place via the NCM Diagnostics.
IWLAN/PB Link PN IO		X	21379908	Only the device name is saved permanently in the C-PLUG when it is used as a PROFINET IO device. The configuration data is transferred from the PROFINET IO controller at every new power-up and temporarily stored in the memory. The formatting of the C-PLUG takes place via the NCM Diagnostics.
IE/AS Interface Link PN IO	X		22712154	Backup of the configuration data of the basic device (for instance device name) and the AS Interface Slaves.
DP/AS Interface Link Adv.	X		22710305	Backup of the configuration data of the basic device (for instance device name) and the AS Interface Slaves.
SCALANCE W	X	X	25442852 27094182 28529396	More information on configuring a SCALANCE W is available in the following entry: 29823212.
SCALANCE X	X		19625108 25508728	The SCALANCE X of the product range 200, 300 and 400 can be run with a C-PLUG.
SCALANCE S			21718449	If a C-PLUG is plugged during resetting to default settings (RESET taster), then the C-PLUG is deleted. The formatting of the C-PLUG takes place via the RESET taster.
CP343-1 (6GK7 343-1EX21-0XE0)			22259495	C-PLUG is required for PROFINET CBA The formatting of the C-PLUG takes place via the NCM Diagnostics.
CP343-1 Adv*) (CP343-1GX21)			22261695	Storage of application data The formatting of the C-PLUG takes place via the NCM Diagnostics.
CP443-1 Adv*) (CP443-1EX40,  CP443-1EX41)			19308980 23643789	Storage of application data The formatting of the C-PLUG takes place via the NCM Diagnostics.

^*) C-PLUG is an absolute requirement

Note:
If the following modules are run with a C-PLUG, then you use the configuration data that is saved on the C-PLUG. In this case, changes to the configuration data is only saved on the C-PLUG. That means the changes to the configuration data are not included in the internal memory of the device. The configuration data in the internal memory of the module and on the plugged in C-PLUG are different.

• SCALANCE W
• IE/PB Link PN IO
• IWLAN/PB Link PN IO
• IE/AS Interface Link PN IO
• DP/AS-Interface Link PN IO
• SCALANCE S
• SCALANCE X of the product series 200

If a SCALANCE X of the product series 300 or 400 is run with a C-PLUG, then the changes to the configuration data on the C-PLUG and in the internal memory of the device are included. The configuration data in the internal memory of the SCALANCE X and on the plugged in C-PLUG are always kept the same.

In the manuals for the modules mentioned above, information is available in the section "C-PLUG (configuration plug)" on the behavior of the module for different applications, such as:

• Module is run without C-PLUG
• Module is equipped with C-PLUG in the as-delivered status
• Module is equipped with C-PLUG in the operating state.

Example of configuring a SCALANCE X-200 with a C-PLUG:

1. Plug the C-PLUG into the SCALANCE X-200.

Fig. 01

2. After switching on the module, the fault LED on the SCALANCE X-200 lights up. Assign an IP address to the SCALANCE X-200 with the Primary Setup Tool (PST) and open the Web Based Management (WBM) by entering the assigned IP address in the Web Browser.

Fig. 02

3. Select the required option in the WBM. In this example, the option "Format C-PLUG and copy internal Configuration on it" is selected, so the current configuration is saved on the C-PLUG in the internal memory of the module.

Fig. 03

4. The SCALANCE X-200 formats the C-PLUG and is restarted automatically. The error LED goes out, and the WBM appears.

Fig. 04

5. Any changes can be made now.

Note:
From now on, any settings/changes are only saved on the C-PLUG.

If the C-PLUG is disconnected, the following message appears in the WBM:

Fig. 05

Select the "Use 'SCALANCE X' without C-PLUG" function to load the configuration which is saved in the internal memory

In the following entry there are examples of configuring a SCALANCE W or IWLAN/PB LINK PN IO with a C-PLUG: 29823212.

PRESET PLUG
The PRESET−PLUG is for easily giving an IWLAN/PB Link PN IO and SCALANCE W devices a defined presetting. Using the PRESET PLUG, an existing configuration can be transferred to any number of other devices. This approach is particularly advantageous for commissioning a large number of WLAN clients which are assigned identical parameters as it saves the user having to parameterize each client manually.

You will find information on creating a PRESET-PLUG in the manual for the IWLAN/PB Link PN IO or in the SCALANCE W handbook.

Instructions:
There is a way of monitoring the signal quality of the Industrial Wireless LAN connection of the IWLAN/PB Link PN IO. The quality of these signals is particularly important for the PROFINET IO applications. The IWLAN/PB Link PN IO can record its radio signal level. Here we describe how to make this recording.
 

No.	Procedure
1	The PG/PC that is to control signal recording is to have a wireless connection to the IWLAN/PB PN IO Link or be connected to the relevant access point with an Industrial Ethernet cable. Use the DOS command "telnet <IP address of the IWLAN PB Link PN IO>" to set up a connection from the PG/PC to the IWLAN/PB Link PN/IO. Enter "inform" and then"signal" and you get to the "Record Menu" (the menu from which you can start/stop recording).
2	The following DOS commands are used to start/stop recording. "recstart <Int> [Num]" - Start recording "recstop" - Stop recording ( 16 KB ) Fig. 01: Start/stop data recording
3	When recording has finished, you have the option of downloading a text file via the DOS directory, which contains the most important measurements like signal % and signal to noise ratio RSSI. The FTP protocol is used for downloading. You use the following DOS commands for downloading: Set up connection to the FTP server: "ftp <IP address of the IWLAN/PB Link PN IO>" Enter "admin" for user and password Download text file: "get signal.txt" ( 16 KB ) Fig. 02: Save recording data in text file "signal.txt"
4	This text file can be used in the "csv" format to display the recording graphically in Excel. The following figure shows an example of a saved text file. ( 37 KB ) Fig. 03: Text file "signal.txt"
5	You import the text file "signal.txt" into Excel via the menu Data -> Import external data -> Import data. Below are possible tabular and graphical presentations in Excel of the text file "signal.txt" shown in Fig. 03. ( 13 KB ) Fig. 04: Tabular presentation in Excel  ( 5 KB ) Fig. 05: Graphical presentation in Excel

 
Description of a WDS:
WDS stands for "Wireless Distribution System" and is the wireless connection of multiple access points (APs) with each other in order to extend the range of a radio network without having to connect the extension access points via Ethernet.
See the following example:

( 93 KB )
Fig. 01

The APs are connected with the previous access point and possibly with the following access point and permit additional wireless access for clients located in their radio cells.
A fundamental disadvantage here is that the usable bandwidth is halved by each additional AP, because each data package has to be transferred double. If the usable bandwidth shrinks too much, you can use a Dual Access Point (e.g. SCALANCE W 788-2) to help out. The type of Dual Access Point mentioned has two WLAN interfaces that can operate on different radio bandwidths. In this way you can use one interface for WDS and the second interface for connecting clients.

Requirements and restrictions
The following conditions must be met:

• All APs connected via WDS must use the same frequency channel (menu item "Interfaces > WLAN"). "Auto Channel Select" cannot be used with WDS.
  
  ( 104 KB )
  Fig. 02
• WDS can only be configured when the SCALANCE W788 is being operated in Access Point mode. If the SCALANCE W788 is configured as client, you cannot set up a WDS.
  
  ( 104 KB )
  Fig. 03
• You cannot configure WDS if the Access Point is using iPCF ("industrial Point Coordination Function") for controlling data traffic in its radio cell (this only applies to SCALANCE W788-1RR and SCALANCE W788-2RR).
• You can also connect other manufacturers' access points as long as they support WDS. However, this connection only works using the MAC address. In this case a WDS connection via the "System Name" is not possible.
• It is not permitted to use IEEE 802.11h for WDS segments.
• Both APs have a unique IP address and can be reached separately without a network connection (in order to avoid any loop formation).

Configuration instructions
WDS can be implemented both unencrypted and encrypted with WEP (40 or 104 bits) or AES (128 bits) encryption. We recommend using one of the two security settings described below.
In order to meet current security directives we will consider only the encrypted options in the following.

Proceed as follows to configure a WDS.
 

Step no.	Procedure
1	Select the "Security > Keys" menu item of the AP concerned and create a Private Key with 128 bits (for this you need 16 ASCII or 32 HEX characters). Press "Set Values" and the key appears with its length as Private Key in the key list. ( 87 KB ) Fig. 04 Then you must restart the AP.
2	Switch to the "Security > Basic WLAN" menu item. Version "WEP" Select the "Shared Key" authentication type and from the public keys you select a "Default WEP Key" corresponding to the encryption depth. Version "WPA" Select the "WPA PSK" authentication type and the "AES" cipher. Specify the key to be used twice identically under Pass phrase and Pass phrase confirmation. ( 97 KB ) Fig. 05 Then you must restart the AP.
3	Switch to the "Bridge > WDS" item of the SCALANCE W concerned. Here you must select a line for each AP connected. Click the "Sel" selection box in each case. Under MAC / sysName you enter the "System > System name" of the WDS partner to be connected. In the case of an AP that is not from the SCALANCE series you must enter the MAC address here. Click the "Enc" selection box in each case. Finally you use the drop-down menu to select the key to be used as defined in Step 2. The keys must be identical on both communication partners. Acknowledge the settings with "Set Values".
4	If both stations are configured correctly, a green light appears under the Link display after "Set Values". ( 87 KB ) Fig. 06

More information:

• To implement PROFINET IO with WDS you must use Dual Access Points. This is the only way to ensure adequate bandwidth for the PN IO communication. Note here the conditions described for Scenario 7 in the FAQ: More Areas of Operation for Industrial Wireless LANs in a PROFINET IO Environment 22547902.
• Use the C-PLUG. This saves reconfiguration if there are hardware defects. However, if there is WDS connection via MAC addresses here, you have to reconfigure the APs connected.
• An alternative to the C-PLUG is to save the configuration via HTTP or TFTP via the menu item "System > Load&Save" on a PC.
• For this please refer to the notes on WDS given for the Firmware Update V3.0.37 for SCALANCE W-700 (Download: 23522136)