Manual 758-916

Manual
WAGO-I/O-SYSTEM 758
WLAN ETHERNET Gateway 2.4 GHz
758-916
Version 1.0.1, applicable from HW/SW Version 01/01
2
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
© 2014 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone:
Fax:
+49 (0) 571/8 87 – 0
+49 (0) 571/8 87 – 1 69
E-Mail:
info@wago.com
Web:
http://www.wago.com
Technical Support
Phone:
Fax:
+49 (0) 571/8 87 – 5 55
+49 (0) 571/8 87 – 85 55
E-Mail:
support@wago.com
Every conceivable measure has been taken to ensure the accuracy and
completeness of this documentation. However, as errors can never be fully
excluded, we always appreciate any information or suggestions for improving the
documentation.
E-Mail:
documentation@wago.com
We wish to point out that the software and hardware terms as well as the
trademarks of companies used and/or mentioned in the present manual are
generally protected by trademark or patent.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Table of Contents
3
Table of Contents
1
1.1
1.2
1.3
1.4
1.5
1.6
Notes about this Documentation ................................................................. 5
Validity of this Documentation ................................................................. 5
Revision History........................................................................................ 5
Copyright................................................................................................... 5
Symbols ..................................................................................................... 6
Number Notation ....................................................................................... 8
Font Conventions ...................................................................................... 8
2
Important Notes ........................................................................................... 9
2.1
Legal Bases ............................................................................................... 9
2.1.1
Subject to Changes ............................................................................... 9
2.1.2
Personnel Qualification ........................................................................ 9
2.1.3
Use in Compliance with Underlying Provisions .................................. 9
2.2
Special Use Conditions for ETHERNET Devices .................................. 10
2.3
Technical Condition of Specified Devices .............................................. 10
2.4
Storage, Assembly and Transport ........................................................... 10
2.5
Safety Advice (Precautions) .................................................................... 11
3
Device Description ..................................................................................... 13
3.1
General Description ................................................................................ 13
3.1.1
WLAN Operating Modes ................................................................... 13
3.1.2
LAN Connection Types ...................................................................... 15
3.1.2.1
Bridge Connection ......................................................................... 15
3.1.2.2
Direct Connection .......................................................................... 15
3.2
View ........................................................................................................ 16
3.3
Labeling................................................................................................... 17
3.4
Connectors............................................................................................... 18
3.4.1
Pin Assignment for Power Supply ..................................................... 18
3.4.2
Pin Assignment for System Connection ............................................. 18
3.4.3
Antenna............................................................................................... 19
3.5
Display Elements .................................................................................... 21
3.6
Operating Elements ................................................................................. 23
3.7
Technical Data ........................................................................................ 24
3.7.1
General Device Data........................................................................... 24
3.7.2
ETHERNET Interface ........................................................................ 25
3.7.3
Radio Interface ................................................................................... 25
3.7.4
Supply ................................................................................................. 25
3.8
Approvals ................................................................................................ 26
4
4.1
4.2
Mounting..................................................................................................... 27
Selecting the Installation Location .......................................................... 27
Fixing ...................................................................................................... 29
5
5.1
Connect Devices ......................................................................................... 30
Connection .............................................................................................. 30
6
Commissioning ........................................................................................... 31
7
7.1
Configuration ............................................................................................. 32
Default Settings ....................................................................................... 32
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Version 1.0.1, applicable from HW/SW Version 01/01
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Table of Contents
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
7.2
Configuration Using the Mode Membrane Button ................................. 33
7.2.1
Selection and Activation of an Autoconfiguration Procedure ............ 33
7.2.2
Overview of Autoconfiguration Procedures ....................................... 36
7.3
Configuration Using the External Trigger Input ..................................... 38
7.4
Configuration using the Web-based Management System (WBM) ....... 39
7.4.1
Accessing the Web-based Management System ................................ 39
7.4.2
“Access Management” Section .......................................................... 42
7.4.3
“System Overview” Section ............................................................... 42
7.4.4
“Network Settings” Section................................................................ 43
7.4.5
“Wireless LAN Settings” Section ...................................................... 45
7.4.6
“Miscellaneous” Section .................................................................... 48
7.4.6.1
Execution of AT Commands ......................................................... 49
8
Appendix ..................................................................................................... 51
8.1
Sample Configurations ............................................................................ 51
8.1.1
Preparation .......................................................................................... 51
8.1.2
Bridge Connection, without Access Point .......................................... 51
8.1.2.1
Configuration of the 1st WEG Using the Mode Membrane
Button ............................................................................................ 52
8.1.2.2
Configuration of the 2nd WEG Using the Mode Membrane
Button ............................................................................................ 53
8.1.2.3
Configuration of the WEGs Using WBM ..................................... 53
8.1.3
Bridge Connection, with Access Point ............................................... 55
8.1.3.1
WEGs and Access Point wirelessly connected .............................. 55
8.1.3.2
Cable Connection between WEG and Access Point...................... 58
8.1.4
Direct Connection, without Access Point ........................................... 60
8.1.5
Direct Connection, with Access Point ................................................ 62
8.2
Time Response ........................................................................................ 64
8.3
Data Rate ................................................................................................. 66
8.4
Coexistence ............................................................................................. 67
8.4.1
Basics .................................................................................................. 67
8.4.2
Optimizing the Device Configuration ................................................ 68
8.5
Range in Open Field................................................................................ 69
8.6
Data Security for Radio Transmission .................................................... 71
List of Figures ...................................................................................................... 72
List of Tables ........................................................................................................ 73
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
1
Notes about this Documentation
Notes about this Documentation
Keep this documentation!
The operating instructions are part of the product and shall be kept for the entire
lifetime of the product. They shall be transferred to each subsequent user of the
product. Care must also be taken to ensure that any supplement to these
instructions are included, if applicable.
1.1
Validity of this Documentation
This documentation is only applicable to the WLAN ETHERNET Gateway
2.4 GHz 758-916.
The device shall only be installed and operated according to the instructions in
this manual.
1.2
Revision History
Table 1: Revision History
Document
Device version
Revision
version
Hardware Firmware
1.0.0
01
01
1.0.1
01
01
Editorial changes.
1.3
Copyright
This Manual, including all figures and illustrations, is copyright-protected. Any
further use of this Manual by third parties that violate pertinent copyright
provisions is prohibited. Reproduction, translation, electronic and phototechnical
filing/archiving (e.g., photocopying) as well as any amendments require the
written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.
Non-observance will involve the right to assert damage claims.
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6
1.4
Notes about this Documentation
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Symbols
Personal Injury!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Personal Injury Caused by Electric Current!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Personal Injury!
Indicates a moderate-risk, potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Personal Injury!
Indicates a low-risk, potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
Damage to Property!
Indicates a potentially hazardous situation which, if not avoided, may result in
damage to property.
Damage to Property Caused by Electrostatic Discharge (ESD)!
Indicates a potentially hazardous situation which, if not avoided, may result in
damage to property.
Important Note!
Indicates a potential malfunction which, if not avoided, however, will not result in
damage to property.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Notes about this Documentation
Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).
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8
1.5
Notes about this Documentation
Number Notation
Table 2: Number notation
Number code
Decimal
Hexadecimal
Binary
1.6
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Example
100
0x64
'100'
'0110.0100'
Note
Normal notation
C notation
In quotation marks, nibble separated with
dots (.)
Font Conventions
Table 3: Font conventions
Font type
italic
Menu
>
Input
“Value”
[Button]
[Key]
Indicates
Names of paths and data files are marked in italic-type.
e.g.: C:\Programme\WAGO-I/O-CHECK
Menu items are marked in bold letters.
e.g.: Save
A greater-than sign between two names means the selection of a
menu item from a menu.
e.g.: File > New
Designation of input or optional fields are marked in bold letters,
e.g.: Start of measurement range
Input or selective values are marked in inverted commas.
e.g.: Enter the value “4 mA” under Start of measurement range.
Pushbuttons in dialog boxes are marked with bold letters in square
brackets.
e.g.: [Input]
Keys are marked with bold letters in square brackets.
e.g.: [F5]
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
2
Important Notes
9
Important Notes
This section includes an overall summary of the most important safety
requirements and notes that are mentioned in each individual section. To protect
your health and prevent damage to devices as well, it is imperative to read and
carefully follow the safety guidelines.
2.1
Legal Bases
2.1.1
Subject to Changes
WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any
alterations or modifications that serve to increase the efficiency of technical
progress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from
the granting of patents or from the legal protection of utility patents. Third-party
products are always mentioned without any reference to patent rights. Thus, the
existence of such rights cannot be excluded.
2.1.2
Personnel Qualification
All sequences implemented on the device may only be carried out by electrical
specialists with sufficient knowledge in installation and handling of electrical
equipment. The electrical specialists must also be familiar with the current
standards and guidelines valid for the device.
2.1.3
Use in Compliance with Underlying Provisions
The device is used for wireless transmission of ETHERNET data packets per
IEEE 802.3. A radio link must be set up for this to another device, for example a
second WLAN ETHERNET Gateway 2.4 GHz 758-916, that also supports the
applicable radio protocol.
The device has been developed for use in an environment that meets the IP65
protection class criteria. This specifies dust-tightness and protection against water
jets (nozzle) from any angle. Operation in hazardous areas is prohibited.
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2.2
Important Notes
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Special Use Conditions for ETHERNET Devices
If not otherwise specified, ETHERNET devices are intended for use on local
networks. Please note the following when using ETHERNET devices in your
system:
2.3
•
Do not connect control components and control networks to an open
network such as the Internet or an office network. WAGO recommends
putting control components and control networks behind a firewall.
•
Limit physical and electronic access to all automation components to
authorized personnel only.
•
Change the default passwords before first use! This will reduce the risk of
unauthorized access to your system.
•
Regularly change the passwords used! This will reduce the risk of
unauthorized access to your system.
•
If remote access to control components and control networks is required,
use a Virtual Private Network (VPN).
•
Regularly perform threat analyses. You can check whether the measures
taken meet your security requirements.
•
Use “defense-in-depth” mechanisms in your system's security configuration
to restrict the access to and control of individual products and networks.
Technical Condition of Specified Devices
The components to be supplied Ex Works, are equipped with hardware and
software configurations, which meet the individual application requirements.
WAGO Kontakttechnik GmbH & Co. KG will be exempted from any liability in
case of changes in hardware or software as well as to non-compliant usage of
components.
Please send your request for modified and new hardware or software
configurations directly to WAGO Kontakttechnik GmbH & Co. KG.
2.4
Storage, Assembly and Transport
Whenever possible, the components are to be stored in their original packaging.
Likewise, the original packaging provides optimal protection during transport.
When assembling or repacking the components, the contacts must not be soiled or
damaged. The components must be stored and transported in appropriate
containers/packaging. Thereby, the ESD information is to be regarded.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
2.5
Important Notes
11
Safety Advice (Precautions)
For installing and operating purposes of the relevant device to your system the
following safety precautions shall be observed:
Always use voltage sources with current limitation/safety extra-low voltage!
Only use power supply sources based on IEC/EN60950 Section 2.5 “Power
sources with limited output” with the device. The output of the external power
supply must be short-circuit protected. The output voltage of the external power
supply shall not exceed 30 VDC.
Do not use device in hazardous environments!
The device is not designed for use in hazardous areas.
Maintenance/Repair only by authorized specialists!
The device contains no parts that can be serviced by users. Always have all
service, reconfiguration, maintenance or repair work performed by specialists
authorized by WAGO.
Do not work on components while energized!
All power sources to the device shall be switched off prior to performing any
installation, repair or maintenance work.
Keep a distance of 20 cm to persons!
Install the device such that it is located at least 20 cm away from all persons
during operation.
Replace defective or damaged devices!
Replace defective or damaged device (e.g., in the event of deformed contacts),
since the long-term functionality of fieldbus station involved can no longer be
ensured.
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Important Notes
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Protect the components against materials having seeping and insulating
properties!
The components are not resistant to materials having seeping and insulating
properties such as: aerosols, silicones and triglycerides (found in some hand
creams). If you cannot exclude that such materials will appear in the component
environment, then install the components in an enclosure being resistant to the
above-mentioned materials. Clean tools and materials are imperative for handling
devices/modules.
Cleaning only with permitted materials!
Clean soiled contacts using oil-free compressed air or with ethyl alcohol and
leather cloths.
Avoid electrostatic discharge!
The devices are equipped with electronic components that you may destroy by
electrostatic discharge when you touch. Pay attention while handling the devices
to good grounding of the environment (persons, job and packing).
Device uses radio waves!
Never use the device in areas where operation of radio equipment is prohibited.
Do not open the enclosure!
Never open the enclosure. Opening of the enclosure will nullify the guarantee,
legal warranty and authorization for use.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
3
Device Description
3.1
General Description
Device Description
13
As a wireless ETHERNET gateway (WEG), the 758-916 device makes it possible
to integrate conventional ETHERNET devices in a wireless network. For this
purpose, the device has a wired ETHERNET interface and another interface for
radio communication. The device uses the integrated radio technology to transmit
the data received on the ETHERNET interface. Conversely, the device uses the
ETHERNET interface to send data received on the radio interface. As data
transmission of ETHERNET packets occurs with a transparent protocol on Layer
2 of the OSI reference model, this provides for easy integration of all Ethernetbased fieldbuses, such as MODBUS/TCP, ETHERNET/IP, PROFINET or
PROFISAFE.
In combination with another function-related device, e.g., another WEG or Access
Point (AP) of the same radio technology, the WEG can serve as a wireless
replacement for ETHERNET cables. The WEG permits particularly robust, realtime radio connections over long distances. A suitable configuration can also
prevent any degradation to other radio networks.
Figure 1: Wireless transmission between two WEGs
An innovative operator control concept enables easy initiation of automatic
configuration processes using a Mode membrane key on the device. This can be
used to configure a substitute cable link between two WEGs in only a few
seconds, without using additional aids or hardware / software.
In addition to operation using the Mode membrane key and the 7 LED status
indicators, access to other status information and advanced device functions of the
WEG is also possible via a Web-based Management System (WBM).
Depending on the application, the unit can be operated in various modes.
3.1.1
WLAN Operating Modes
WLAN distinguishes between two fundamentally different network operating
modes: Infrastructure mode and ad-hoc mode.
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Device Description
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Figure 2: Infrastructure mode
In infrastructure mode, a distinction is made between two roles for devices in the
network. One of the WLAN devices must act as an access point and centrally
manage the network while all other WLAN devices act as clients.
Figure 3: Ad-hoc mode
In ad-hoc mode, the attached WLAN devices manage the network peripherally.
Due to the higher administrative effort, only lower data rates and limited security
mechanisms are available in contrast to the infrastructure mode.
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WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Device Description
15
The WEG can establish a connection with WLAN networks of both operating
modes, but cannot function as an access point itself. If an access point is available
and the WEGs can be configured via Web-based Management, the preferred
method of operation for the WLAN is in infrastructure mode. This permits higher
data rates and the use of better security mechanisms.
3.1.2
LAN Connection Types
Independent of the selected WLAN operating mode, the WEG can be configured
for two different LAN connection types: Bridge connection and direct connection.
3.1.2.1
Bridge Connection
Similar to using an ETHERNET switch, the bridge connection makes it possible
to connect two ETHERNET segments. To this end, exactly two WEGs must be
configured in the network, so that a connection transparent for LAN devices (a
bridge) is created between them. In this way, connected WEGs are functionally
comparable to two ports of an ETHERNET switch to which other ETHERNET
hubs or switches can also be connected.
Bridge connection between two ETHERNET segments only!
A WEG can use a bridge connection to connect exactly one locally connected
ETHERNET segment with exactly one ETHERNET segment connected to
another WEG. It is not possible, for example, to connect three ETHERNET
segments in this manner.
DHCP is not supported with bridge connections!
If a bridge connection is established, the IP addresses of the WEGs must be static.
Automatic reference of IP addresses via DHCP is not supported for this
connection type.
3.1.2.2
Direct Connection
In a direct connection, a WEG can be used as a wireless adapter for exactly one
wireless ETHERNET device. The WEG acts as a wireless extension of the wired
network interface of this reference device by cloning its ETHERNET MAC
address. Therefore, the reference device must be connected to the associated
WEG directly. If an ETHERNET segment is connected to several instead of a
single ETHERNET device, only the reference device can use the WEG as a
wireless adapter without restriction.
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3.2
Device Description
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
View
Figure 4: View
Table 4: Legend for the “View” figure
No.
1
2
3
4
5
6
7
8
Description
Status and diagnosis LEDs (front)
Internal circular polarized directional antenna 5 dB
Fixing hole 1
LEDs for link quality indication (bottom),
configuration and status indication
Mode membrane key for configuration
Network connection, M12 socket on device
Power supply, M12 connector on device
Fixing hole 2
Details see Section:
“Display Elements”
“Connectors”
“Mounting”
“Display Elements”
“Operating Elements”
“Connectors”
“Connectors”
“Mounting”
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758-916 WLAN ETHERNET Gateway 2.4 GHz
3.3
Device Description
17
Labeling
The status indicators for (POWER, (((.))), LAN) are marked on the front of the
device.
Figure 5: Marking on front of device
The connections (Power, LAN), link quality and configuration button (Mode) are
marked on the bottom of the device.
Figure 6: Marking on bottom
The device MAC address is included with other device data on the nameplate on
the back or side of the device.
Figure 7: Nameplate on back/side
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Device Description
3.4
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Connectors
The device is equipped with two connections at the bottom:
Figure 8: Connections at bottom of device
Table 5: Legend for the “Connections at bottom of device” figure
No. Description
1
Power supply and trigger input (“Power”)
2
Network connection (“LAN”)
3.4.1
Pin Assignment for Power Supply
Power is supplied to the device via a 5-pole, A-coded M12 connector.
Table 6: Power supply, M12 Connector on Device
Pin
1
2
3
4
5
3.4.2
Pin assignment
Vin + (9 V … 30 VDC)
Trigger input ground
Vin Ground (0 V)
Trigger-input + (9 V … 30 VDC)
Not in use
Pin Assignment for System Connection
The device is connected to the ETHERNET network via a 4-pole, D-coded socket
and supports autonegotiation for 10/100 Mbit and the duplex mode.
Table 7: System connection, M12 Socket on Device
Pin Pin assignment
1 Transmit +
2
Receive +
3
Transmit -
4
Receive -
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758-916 WLAN ETHERNET Gateway 2.4 GHz
3.4.3
Device Description
19
Antenna
The device is equipped with an internal antenna. Good reception conditions exist
when the front of the device is oriented centered to the remote device with which
the radio link is to be established.
Figure 9: Aligning the device
The alignment characteristic for the internal antenna is primarily relevant for links
in the open field and over long distances. When operating the device at short
distances, inside buildings or without line-of-sight links structural conditions are
the decisive factor for good reception.
As the device comes equipped with a circular polarized antenna, rotation of the
device around the link axis between the local and remote device does not have any
adverse impact on link quality.
The directional alignment (antenna) diagrams for the antenna are given in the
following figures for a frequency of 2.45 GHz.
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Device Description
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Figure 10: Antenna diagram 2.45 GHz – longitudinal axis
The diagram above illustrates the two-dimensional top view of the electromagnetic field of the antenna, with the antenna being the center point. At a beam
angle of around 60° the antenna provides excellent reception levels; reception
continues to be good up to an angle of 90°, whereas reception markedly
deteriorates at beam angles of 110° and greater.
Figure 11: Antenna diagram 2.45 GHz – transverse axis
The diagram above shows the side view of the antenna's electromagnetic field.
Manual
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758-916 WLAN ETHERNET Gateway 2.4 GHz
3.5
Device Description
21
Display Elements
The current device status is indicated by the three LEDs on the front of the WEG.
Four other LEDs at the bottom of the device indicate the link quality, or the
selected autoconfiguration procedure.
Figure 12: Display elements
Table 8: Legend for the “Display elements” figure
Nr. Designation
*
Color
1
Power
green
2
((( . )))
blue
purple
red
3
LAN
4
Link
Quality*
Status
On
Off
Blue
Blue flashing
Purple
Red
Off
On
yellow Blinking
Off
A on
A+B on
green A+B+C on
A on
A+B on
Meaning
Device ready for operation
Device not ready for operation
Wireless link active
Data transmission
Setting up link to other radio
device
Error
No wireless link available
ETHERNET link available
ETHERNET communication active
No ETHERNET link available
Acceptable link quality
Good link quality
Optimal link quality
Acceptable link quality
Good link quality
Status signals are also indicated via LEDs A to D during configuration. In this case, the indicators
will differ from the status information given here, see Section “Configuration using the Mode
membrane button”.
Observe the operating mode!
The indicators for wireless and ETHERNET link are only valid when the power
LED signals “Device ready for operation”. In special modes, such as device
initialization or firmware update, the LEDs mentioned previously may respond
differently than described above.
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Device Description
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Display of the link quality in conjunction with access point only!
LEDs A to D are only available for visualization of the link quality when the
WEG is connected to an access point (infrastructure mode). In an ad-hoc network,
this status indication is not available.
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758-916 WLAN ETHERNET Gateway 2.4 GHz
3.6
Device Description
23
Operating Elements
The “Mode” membrane button is located at the bottom of the device. This button
is used to initiate certain autoconfiguration procedures. LEDs A to D indicate
which procedure is active. For more information about this refer to the Section
“Configuration using the Mode membrane button”.
Figure 13: Operating element
Table 5: Legend for the “Operating element” figure
No.
1
Description
Mode membrane button
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Device Description
3.7
Technical Data
3.7.1
General Device Data
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Table 9: Technical Data – General Device Data
Function
Dimensions (mm)
WxHxD
Weight
Ports
Operating temperature
Storage temperature
Degree of protection
Relative humidity
(without condensation)
Connection to PE
Fitting position
Free from silicone
RoHS-compliant
Configuration
Immunity to interference
Emission of interference
Mechanical stability
Wireless ETHERNET Gateway (WEG)
66 x 91 x 36
120 g
Power connector:
M12 plug, A-coded
ETHERNET connector:
M12 socket, D-coded
-30 °C ... + 65 °C
-40 °C ... + 85 °C
IP65
95 %
Not required
On a level mounting surface
Yes
Yes
Via Web-based Management System
or using the Mode membrane button
Static discharge based on EN 61000-4-2:
Contact discharge ± 6 kV
Air discharge ± 8 kV
Electromagnetic fields based on IEC61000-4-3:
10 V/m, Criterion A
Mains borne disturbance based on IEC 61000-4-6:
10 V RMS, Criterion A
Rapid transients (burst) based on IEC 61000-4-4:
Data interface: 1 kV
Power supply: 2 kV
Surge voltage based on IEC 61000-4-5:
Data interface: ± 1 kV
Power supply: ± 0.5 kV
Per EN 55022 Class B (residential areas)
Shock test based on IEC 60068-2-27
Operation 25 g, duration 11 ms
Storage/Transport 50 g, duration 11 ms
Vibration test based on IEC 60068-2-6
Operation 5 g, 10-150 Hz, Criterion 3
Free fall based on IEC 60068-2-32
1m
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
3.7.2
Device Description
25
ETHERNET Interface
Table 10: Technical Data – ETHERNET Interface
Number of inputs
Medium
Transmission rate
Default IP address
Default subnet mask
3.7.3
1
Via M12, twisted pair wire, wire cross section
0.14 mm² ... 0.22 mm²
10/100 MBit/s, Autonegotiation
192.168.1.99
255.255.255.0
Radio Interface
Table 11: Technical Data – Radio Interface
Protocol
Antenna
Transmission range
Topology
Connection type
3.7.4
IEEE 802.11 b/g/n, max. 65 MBit/s
Internal directional antenna (non-exchangeable)
Up to 400 m (open field)
Infrastructure, Ad-hoc
Client
Supply
Table 12: Technical Data – Power Supply
Power supply connection
Nominal Voltage
Voltage range, permissible
Current consumption, typical
Current consumption, maximum
Via M12, max. wire cross section 2.5 mm²
24 VDC (SELV)
9 V to 30 VDC
80 mA at 24 VDC
120 mA at 24 V
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
26
3.8
Device Description
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Approvals
Conformity Marking
IC „Industry Canada“
IC: 5325A-0941
FCC “Federal Communications Commission”
FCC ID: PVH0941
/ CFR 47 Part 15, ETS 300328
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
With the exception of Andorra, Bulgaria, France and Latvia, the device may be
used without restrictions in all European countries and in Switzerland, the USA
and Canada.
The device may be used inside buildings in Bulgaria.
In France, the transmitting power must be limited to 10 dBm when used outside of
buildings. In Norway the device may not be used with a radius of 20 km of the
town center of Ny-Âlesund (Spitzbergen).
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
4
Mounting
4.1
Selecting the Installation Location
Mounting
27
In order to use all the functions of the WEG, a radio link must be established to a
device having similar functions, for example a second WEG of the same type. If
the two devices are relatively close to one another, that is, if the distance between
them is considerably less than the potential range, the installation location and
device alignment will have comparatively little impact on the radio link. If you
wish to set up and maintain a radio link over the longest distance possible,
however, certain requirements regarding the installation of the device and the
ambient conditions must be fulfilled.
The distance between devices may not be too great. The maximum range can only
be effective under optimal conditions. A lack of line-of-sight link, or misalignment of the devices will result in reduced range.
For a line-of-sight link, install the devices such that the antennas are aligned
toward one another, i.e., the marked front side of the devices face one another (see
also the figure and the antenna diagrams in the section “Connectors” >
“Antenna”).
If there is no line-of-sight link, but both devices have an unobstructed view of the
same metallic or concrete surface (such as a building ceiling), a good radio link
can be ensured through reflection.
If there is neither a line-of-sight link, nor a surface to use for reflection, for
example between devices in different rooms, align the devices as for a line-ofsight link. The magnitude of the reduction in range for the devices in this case
depends on the amount of material, e.g., brick walls, that the radio waves must
pass through. In some circumstances, it may not be possible for the radio waves to
penetrate certain obstacles, such as fire protection walls, at all.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
28
Mounting
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Table 13: Selection of Installation Location
Ambient Conditions, Installation Location
Radio link possible?
Distance between devices is more than 400 m.
Line-of-sight link between devices that are about
200 m apart. Devices have been optimally
installed and configured.
Two plaster or brick walls are located between
the devices; distance between devices is around
30 m.
No
Yes
Yes. Links are also possible
without line of sight, but the
range is substantially reduced,
depending on the obstacle (e.g.,
a wall).
A fire protection wall or a steel-reinforced
No. Reinforced concrete and
concrete ceiling is located between the devices. other similar materials cannot
be penetrated by radio waves
when they are too thick.
The devices are located less than 50 m apart in a Possible. Building ceilings or
plant building, with the line of sight being
other metallic or steelobstructed by numerous machines or vehicles.
reinforced large objects may
permit an indirect link by
reflecting the radio waves.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
4.2
Mounting
29
Fixing
Always maintain a minimum distance of 50 cm between two WEGs!
Always maintain a distance of at least 50 cm between WEGs when installing
them. Radio link quality can be degraded on failure to maintain this distance.
Do not install antenna directly in front of metallic surfaces!
The front of the WEG, and hence the internal antenna, shall not be located
directly in front of metallic surfaces, as this can permanently degrade the radio
capabilities of the antenna.
Use the drilled holes (see drawing below), for example, and the two M3 screws to
attach the WEG to any flat, level surface.
Figure 14: Drilled holes for attaching the WEG
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
30
Connect Devices
5
Connect Devices
5.1
Connection
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Before the device can be used, all cable connections must be established.
Ensure that wires are not live!
Power supply: Do not switch on the power supply until the device has been
properly connected.
LAN: Improperly routed ETHERNET cables can carry dangerous overvoltage.
Always ensure that these cables have been laid properly before connecting the
device to the network.
1.
Use a suitable cable, such as WAGO Item 756-1203/060-050, to connect the
WEG to your network or ETHERNET terminal.
2.
Use a suitable cable, such as WAGO Item 756-3101/040-020, to connect the
WEG to the external power supply unit.
Figure 15: Connecting the WEG
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
6
Commissioning
Commissioning
The device is not equipped with a power switch, meaning it is put into operation
simply by applying power.
Use the correct supply voltage!
The output of the power supply unit must provide 24 VDC with a maximum
current flow of 200 mA.
Switch on the external power supply unit to put the device into operation.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
31
32
7
Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration
After you have connected the WEG you can configure it in one of two ways:
•
•
using the Mode membrane button and by activating certain modes
by making settings via the Web-based Management System (WBM)
The various types of configuration are described in the following sections.
If the device has already been configured and you are not familiar with the current
configuration, we recommend resetting the device to its factory default settings
before making any further configuration settings. This can be done using the
Mode membrane button.
7.1
Default Settings
The following settings are active on initial startup of the WEG:
Table 14: Default Settings
Group
Access Management
Network Settings
Network Settings
Network Settings
Network Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Wireless LAN Settings
Parameter
Password
IP Address
Subnet Mask
Default Gateway
IP Assignment
Network Name (SSID)
Operating Mode
Channel
Channel List
Data Rate
Transmit Power
Security Mode
Mode
WLAN MAC Address
Miscellaneous
S Register 1216
SMART Modes
Action triggered by
event TRIGGER_PUSH
Action triggered by
“0”
event TRIGGER_HOLD
S Register 1217
Default value
“wago”
“192.168.1.99”
“255.255.255.0”
“192.168.1.99”
“Static”
(empty)
“Infrastructure”
“0 (Auto)”
“1-11”
“0 (Auto)”
“+17 dBm”
“None”
“Multi-Client”
(same as parameter
ETHERNET MAC
Address)
“4”
“0”
You can always restore the factory default settings at any time using the Mode
membrane button (see following section). This can be useful, for example, if you
have forgotten the IP address or the device AT password.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
7.2
Configuration
33
Configuration Using the Mode Membrane Button
The quickest and easiest method for configuring the device is using the Mode
membrane button located at the bottom of the device. LEDs A to D indicate the
status during configuration, based on the active operating mode. By repeatedly
pressing the Mode membrane button you can select and start an autoconfiguration
procedure in the device that then automatically carries out the device
configuration for the required scenario.
Figure 16: Mode membrane button and status LEDs
7.2.1
Selection and Activation of an Autoconfiguration
Procedure
General procedure:
1.
Switch off the power supply to the WEG and then re-activate power supply
to the device.
The Power LED lights up.
2.
Within the first 5 seconds after applying power, press the Mode membrane
button to switch to the operating mode “Configuration selection”.
LED A lights up and the operating mode “Configuration selection” is active.
If this is not the case, repeat steps 1 and 2.
3.
Select the autoconfiguration procedure:
Select the required autoconfiguration procedure by pressing the Mode
membrane button until the appropriate combination of LEDs lights up (see
previous section “Overview of Autoconfiguration Procedures”).
If you have switched through all the operating modes in order, you can
return to the first option in the order by pressing the button again.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
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Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration is halted if the Mode membrane button is not pressed for 20 s!
The mode “Configuration selection” is de-activated automatically if you do not
press the Mode membrane button for selecting the autoconfiguration procedure.
The WEG will then start up using the previous settings.
4.
Activate autoconfiguration procedure:
To execute the selected autoconfiguration procedure press the Mode
membrane button again and hold it in for at least 2 seconds until the LED
indicators A-D or the Power LED change.
The device performs a restart as soon as the procedure has been completed
successfully or canceled.
The behavior of the device up to this restart is based on the active
autoconfiguration procedure:
Procedures 2, 3:
Other procedures:
The device carries out the changes to the configuration and
ends the procedure directly after this.
This only takes a few seconds.
The LEDs A-D corresponding to the procedure will flash
until the procedure is concluded. All of these procedures
can also be manually terminated prematurely by pressing
the Mode membrane button again, or by briefly
disconnecting the power supply from the device. These
procedures end automatically on successful configuration of
a link, or after a timeout of 5 minutes.
The LEDs return to their normal status on conclusion of the autoconfiguration
procedure.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration
35
Figure 17: Flow chart
Enable de-activated WBM using the Mode membrane button!
If autoconfiguration is conducted with PROFINET optimization, the device deactivates the Web-based Management System to provide short cycle times.
Consequently, configuration can only be changed using the Mode membrane
button. Reset the device to the factory default settings to enable access to the Webbased Management System again.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
36
Configuration
7.2.2
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Overview of Autoconfiguration Procedures
The following autoconfiguration procedures can be selected in the order given:
Table 15: Autoconfiguration Procedures
Press
button Autoconfiguration Procedures
1
Automatically obtain temporary IP parameters
The device attempts to obtain temporary IP parameters
from a DHCP server. Parameters obtained in this manner
are only valid until the next reboot.
A
2
Reset device to factory default settings
Restore all settings to the factory default settings.
B
3
Reset IP parameters
Restore the IP parameters to the factory default settings.
All other settings are retained.
4
Wait for automatic configuration
The device will wait for configuration by a different WEG
that executes the Autoconfiguration procedure “Initiate
automatic configuration”. Although the device is
connectable, it will not initiate the setting up of a link.
C
Initiate automatic configuration
The device automatically sets up a link to a different WEG
that executes the Autoconfiguration procedure “Wait for
automatic configuration”. When a connection has been
established, both WEGs are automatically configured for a
bridge connection.
A+C
Wait for automatic configuration, with PROFINET/PROFISAFE optimization
The device will wait for configuration by a different WEG
that executes the Autoconfiguration procedure “Initiate
automatic configuration, with PROFINET-/PROFISAFE
optimization”. Although the device is connectable, it will
not initiate the setting up of a link.
B+C
1x
2x
3x
4x
5
5x
6
6x
7
7x
LED
A
B C
D
A+B
Initiate automatic configuration, with PROFINET/PROFISAFE optimization
The device automatically sets up a link to a different WEG
that executes the Autoconfiguration procedure “Wait for
A+B+C
automatic configuration, with PROFINET-/PROFISAFE
optimization”. When a connection has been established,
both WEGs are automatically configured for a bridge
connection and PROFINET/PROFISAFE optimization
activated.
On configuration using the Mode membrane button, only those parameters
required for the particular autoconfiguration will be overwritten.
You can use the Web-based Management to make changes to the settings not
affected by the respective autoconfiguration. These changes also remain effective
after a configuration using the Mode membrane button.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration
37
Autoconfiguration procedures 1 to 3 always become effective; procedures 2 and 3
change the device configuration immediately.
Autoconfiguration procedures 4 to 7 only change the device configuration when a
radio link has been successfully established. If the WEG loses power before the
autoconfiguration has been completed, or if no other WEG can be contacted via
the radio link within 5 minutes for automatic configuration, the device will retain
its previous configuration settings when it is restarted.
The following settings are overwritten in the course of the various
autoconfiguration procedures:
Table 16: Overwriting of Configuration
Autoconfigurati Changes to Configuration on Successful Setup of Link
on procedure
The following settings are temporarily modified:
1
• Network Settings > IP-Address: “192.168.1.99”
• Network Settings > Subnet Mask: “255.255.255.0”
• Network Settings > Default Gateway: “192.168.1.99”
• Network Settings > IP Assignment: “Static & DHCP Server”
The saved configuration is restored after rebooting the device.
All settings are changed.
2
• Network Settings > IP-Address: “192.168.1.99”
3
• Network Settings > Subnet Mask: “255.255.255.0”
• Network Settings > Gateway: “192.168.1.99”
• Network Settings > IP Assignment: “Static”
• Network Settings > IP-Address: “192.168.1.99”
4
• Network Settings > Subnet Mask: “255.255.255.0”
• Network Settings > Gateway: “192.168.1.99”
• Network Settings > IP Assignment: “Static”
• Wireless LAN Settings > Network Name (SSID): (as partnered device)
• Wireless LAN Settings > Operating Mode: “Ad-Hoc”
• Wireless LAN Settings > Security Mode: “WEP128”
• Wireless LAN Settings > Passkey: (as partnered device)
• Wireless LAN Settings > IP Address: “192.168.1.100”
• Wireless LAN Settings > UDP Port: “7”
• Network Settings > IP-Address: “192.168.1.100”
5
• Network Settings > Subnet Mask: “255.255.255.0”
• Network Settings > Gateway: “192.168.1.99”
• Network Settings > IP Assignment: “Static”
• Wireless LAN Settings > Network Name (SSID): (as partnered device)
• Wireless LAN Settings > Operating Mode: “Ad-Hoc”
• Wireless LAN Settings > Security Mode: “WEP128”
• Wireless LAN Settings > Passkey: (as partnered device)
• Wireless LAN Settings > IP Address: “192.168.1.99”
• Wireless LAN Settings > UDP Port: “7”
As autoconfiguration procedure 4, but also:
6
• De-activate the Web-based Management System
• Activate PROFINET optimization
As autoconfiguration procedure 5, but also:
7
• De-activate the Web-based Management System
• Activate PROFINET optimization
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
38
7.3
Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration Using the External Trigger Input
The external trigger input can be used to signal the device of one of two events.
Which process is triggered can be configured for each event (see Section
“Configuration Using Web-based Management”).
Before the trigger input can be used in this manner, the power supply to the
trigger input must be switched off.
•
To signal the TRIGGER_PUSH event, apply a voltage to the trigger input
for a period of less than 2 seconds. The signal is triggered when the power
supply to the trigger input is switched off again.
•
To signal the TRIGGER_HOLD event, apply a voltage to the trigger input
for a period of more than 2 seconds. The signal is triggered after approx. 2
seconds.
Switch off the power supply to the trigger input again!
The device ignores when the Mode Membrane button is pressed when the external
trigger input has power. Therefore, always switch off the power supply to the
trigger input after signaling TRIGGER_HOLD.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
7.4
Configuration
39
Configuration using the Web-based Management
System (WBM)
A Web-based Management System (WBM) is available on an integrated Web
server for configuring the WEG.
You can go the WBM by entering the IP address of the device in the browser
URL line.
Device configuration is password protected. On initial commissioning, the device
uses the static IP address and the default settings password (see section “Default
Settings”). If you have forgotten the IP address or password you can reset the
device to its factory default settings.
The IP address of the PC used to access the WBM must be in the same subnet as
the WEG. You may have to modify the IP configuration of the PC from which
you are accessing the WBM before a link can be set up. If the PC is configured to
get the IP address via DHCP automatically, you can connect the WEG and PC
directly and temporarily activate the integrated DHCP server of the WEG via
autoconfiguration procedure 1 (see section “Configuration Using the Mode
Membrane Button”).
7.4.1
Accessing the Web-based Management System
1.
To open the WBM, launch a Web browser (e.g., Microsoft Internet Explorer
or Mozilla Firefox).
2.
Enter the IP address of the WEG on the URL line and confirm by pressing
[Enter].
For WBM access; check the IP/firewall settings and the connection!
If you are not granted access to the WBM check the IP configuration for the PC
from which you wish to access the WBM and the settings for the firewalls being
used. Ensure that the WEG is properly connected and ready for operation and that
the specified IP address is correct. Should you still not be able to set up a
connection to the WBM after ruling out any error at the PC, or if you have
forgotten the IP address of the WEG, reset the device to its factory default
settings.
When access has been made to the WBM the WEG will display an overview page
showing status information and operating elements for changing the device
configuration (see figure below).
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
40
Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Figure 18: WBM main page before login
Before taking any further steps you should log on to the system using a valid
password:
3.
Enter your password in the field System Overview > Password.
4.
Send the password by clicking on [Login].
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Figure 19: WBM main page after login
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
Configuration
41
42
Configuration
7.4.2
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
“Access Management” Section
You can enter or change the access password for protected device settings in this
section.
Figure 20: WBM section “Access Management”
Change password
7.4.3
1.
Enter the new password in the box New Password.
2.
Enter the password again in the box Confirm Password.
3.
Save the new password by clicking on [Change Password].
“System Overview” Section
General information about the device and the device status is displayed in this
section.
Figure 21: WBM section “System Overview”
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Configuration
43
Table 17: WBM section “System Overview”
Parameter
General
Firmware
Wireless LAN
Status
Operating Mode
MAC Address
Status
LAN Network
IP Address
Subnet Mask
Default Gateway
IP Assignment
Ethernet MAC
address
LAN Status
Value
(example)
Description
(“2.3.5”)
Display of the WEG firmware version
(“Infrastructure”)
Display of the network type
(“00:12:F3:12:FE:76”) Display of the WLAN MAC address
(“Not Connected”)
Display of the WLAN link status
(“192.168.1.99”)
(“255.255.255.0”)
(“192.168.1.99”)
(“Static”)
(“00:12:F3:0F:D6:1C”)
(“Link up”)
Display of the WEG IP address
Display of the network mask
Display of the gateway
Display of the IP assignment method
Display of the ETHERNET MAC
address
Display of the LAN link status
Clicking the [Stop Automatic Update] or [Start Automatic Update] button
respectively stops or starts automatic update of the information displayed.
7.4.4
“Network Settings” Section
You can perform network configuration in this section.
Figure 22: WBM section “Network Settings”
Please note the interaction with other devices in the network!
Changes to the network settings of a device can affect other devices in the same
network. An improper configuration, e.g., duplicate assignment of the same IP
address, can cause devices to not work as intended. Therefore, always make sure
that the configuration is correct especially when devices are configured to
function as DHCP servers.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
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Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Table 18: WBM section “Network Settings > IP configuration”
Parameter
IP configuration
IP address
Subnet Mask
Default gateway
IP Assignment
Value
(example)
Description
(“192.168.1.99”)
(“255.255.255.0”)
(“192.168.1.99”)
“Static”
“DHCP Client”
“Static & DHCP
Server”
“Static & DHCP
Relay”
“DHCP Client &
DHCP Relay”
Input IP address for WEG
Input the network mask
Input the standard gateway
Deactivate DHCP, use static IP parameters
Obtain IP parameters from DHCP server
Use own static IP address and activate
DHCP server
Use own static IP address, forward DHCP
queries to other devices
Obtain IP parameters from DHCP server,
forward DHCP queries to other devices
Clicking the [Write Network Settings] button saves all settings of the Network
Settings section.
Use different IP addresses in network!
To rule out any IP address conflicts, all devices must use different IP addresses.
Reset IP parameters without changing settings!
If you no longer know the IP address for your WEG you can reset the IP address
for the WEG using the Mode membrane button without having to change other
settings (see section “Configuration using the Mode Membrane Button” >
“Overview of Autoconfiguration Procedures” > “3 – Resetting IP Parameters”).
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
7.4.5
Configuration
45
“Wireless LAN Settings” Section
You can make changes in this section which affect the radio communications
interface.
Figure 23: WBM section “Wireless LAN Settings”
Table 19: WBM section “Wireless LAN Settings > Network”
Parameter
Value
Description
(example)
Wireless LAN
Network
Network Name (SSID) (“MySSID“) Input of the network SSID to which a connection is to be
established.
Clicking the [Scan for Networks] button scans for available WLAN networks.
The SSIDs of any networks found appear in the dropdown menu above the button.
Left-clicking on the SSID of any network found moves it from the list of the
dropdown menu to the Network Name (SSID) field.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
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Configuration
WAGO-I/O-SYSTEM 758
758-916 WLAN ETHERNET Gateway 2.4 GHz
Table 20: WBM section “Wireless LAN Settings > General”
Parameter
Value
Description
(example)
General
“Infrastructure” A link to an infrastructure network managed by an
Operating Mode
access point can be established.
“Ad-Hoc”
A link to an ad-hoc network can be established.
“0 (Auto)”
The radio channel is automatically selected.
Channel
1 to 11
The radio channel set manually is used.
Reserved for future use.
Channel List
Data Rate
Transmit Power
“0 (Auto)”
Data is transferred automatically at the highest possible
data rate.
1 to 58.5 Mbit/s The data transfer rate cannot exceed the value set
manually.
-17 to +17 dBm The transmit power cannot exceed the value set
manually.
Table 21: WBM section “Wireless LAN Settings > Security”
Parameter
Value
Description
(example)
Security
“WPA2-PSK
Use WPA2-PSK (AES) security mode. The same
Security Mode
(AES)”
passkey must be used for all devices in the radio
network.
“WPA-PSK
Use WPA-PSK (TKIP) security mode. The same
(TKIP)”
passkey must be used for all devices in the radio
network.
“WPA2-PEAP” Use WPA2-PEAP security mode. Valid entries for User
Name, Domain, Certificate Fingerprint and Password
must be entered.
“None”
Use unsecured radio connection.
“Other”
Use user-defined security settings.
Entering special characters using a leading "\".
In individual cases, a passkey can also include special characters not available on
the keyboard used. To enter such characters, use a backslash ("\") followed by the
hexadecimal ASCII numerical code of the required character.
Example: The character string "123" corresponds to the ASCII numerical code
0x31, 0x32, 0x33. "\31\32\33" could also be entered instead of "123".
Manual
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Configuration
47
Table 22: WBM section “Wireless LAN Settings > Client Mode”
Parameter
Value
Description
(example)
Client Mode
“Ethernet Bridge”
The device is set up for a bridge connection. Multiple
Mode
subscribers of the connected LAN can use the radio
link.
“Multi-Client”
The device is set up for a direct connection. Only one
subscriber of the connected LAN can use the radio link
for transmitting any ETHERNET telegrams. A limited
number of other LAN subscribers can use the radio
link to transmit IP telegrams.
“Client”
The device is set up for a direct connection. Only one
subscriber of the connected LAN can use the radio
link.
(“00:24:73:9E:A3:C8”) (only when Mode setting equals “Multi-Client” or
Found MAC
“Client”)
Addresses
Dropdown menu that lists ETHERNET MAC
addresses of subscribers recognized in the connected
LAN. By left-clicking on a list entry, it is applied as
the WLAN MAC Address setting.
(“00:24:73:9E:A3:C8”) (only when Mode setting equals “Multi-Client” or
WLAN MAC
“Client”)
Address
ETHERNET MAC address of the subscriber of the
connected LAN that can use the radio link without
restriction.
(“192.168.1.100”)
(only when Mode setting equals “Ethernet Bridge”)
IP Address
IP address of the device that forms the other endpoint
of the ETHERNET bridge.
“0”
(only when Mode setting equals “Ethernet Bridge”)
UDP Port
UDP port used to exchange administrative data with
the device that forms the other endpoint of the
ETHERNET bridge. This setting must be identical on
both endpoints.
The [Scan MAC Addresses] button only appears when the Mode setting equals “MultiClient” or “Client”. Click this button to scan for ETHERNET devices in the connected
LAN. The MAC addresses of any ETHERNET devices found are listed in the Found
MAC Addresses dropdown menu.
Clicking the [Write Wireless LAN Settings] button saves all settings of the Wireless
LAN Settings section.
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Configuration
7.4.6
WAGO-I/O-SYSTEM 758
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“Miscellaneous” Section
You can define special settings in this section.
Figure 24: WBM section “Miscellaneous”
By clicking the [Read all Settings] button, the WEG reads all parameters displayed on
the WBM page again. Any changes made in the WBM that have not been saved are lost.
By clicking the [Write all Settings] button, all parameters displayed on the WBM page
are written to the WEG. Some changes to parameters only take effect after the WEG is
rebooted.
By clicking the [Execute] button, the autoconfiguration procedure selected in the
dropdown menu under the SMART Modes section is started (see also section
“Configuration Using the Mode Membrane Button”).
The device is rebooted by clicking the [Reboot Device] button. Any settings not
saved are lost. After completing the reboot, the password must be entered again
before continuing with the configuration.
The device is reset to factory settings by clicking the [Restore Device] button.
Any settings not saved are lost. After completing the reboot, the password must be
entered again before continuing with the configuration.
The Configuration and Firmware Update sections are reserved for later use.
The use of AT commands is described in the section “Execution of AT
Commands” in detail.
Manual
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7.4.6.1
Configuration
49
Execution of AT Commands
Reading or writing of parameters for the WBM is mapped internally by execution
of AT commands. These commands are automatically sent to the WEG by
pressing buttons in the WBM. The command last sent via the WBM and the
response from the device appear in the “AT Commands” text box on the left side.
In addition, a longer history of any AT commands sent and responses received can
also be displayed. Click [Show AT Commands] to display an “AT Commands:”
text box on the right side or click [Hide AT Commands] to hide the text box.
WBM control elements are available for configuring all common device settings.
However, certain advanced settings can only be made by manually executing AT
commands.
Figure 25: Text area “AT Commands”
To define an AT command, enter the AT command in the Send AT Command
field. Writing commands are concluded with "=<v>", with "<v>" indicating the
value to be written. Read commands end with "?".
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An example of write access could be “ATS1216=0”, an example of read access
“ATS1217?”.
When the command has been executed, the WEG replies with "OK", followed by
data (for read-only access). If the command fails, "ERROR" is signaled.
Table 23: AT Commands
AT Command
Description
AT&F
Reset the WEG to the factory default settings. There is no distinction
drawn between read and write access for this command, nor does it
possess any parameters.
ATS<n>?
Query or write the current value from the S register <n>.
ATS<n>=<v>
<n> = 1216: TRIGGER_PUSH procedure:
Defines which procedure is triggered for the TRIGGER_PUSH event.
Possible settings:
0: Shut down and reestablish radio link
1: Switch ON/OFF all LEDs
2: Reboot device
<n> = 1217: TRIGGER_HOLD procedure:
Defines which procedure is triggered for the TRIGGER_HOLD event.
Possible settings:
0: Shut down and reestablish radio link
1: Switch ON/OFF all LEDs
2: Reboot device
AT*AMGD?
AT*AMGD=<data>
Up to 31 bytes of any user-specific data <data> can be stored in the
WEG. This data is permanently stored and is also available after a
restart.
Manual
Version 1.0.1, applicable from HW/SW Version 01/01
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8
Appendix
8.1
Sample Configurations
8.1.1
Preparation
Appendix
51
Reset the WEG prior to the sample configuration!
Always perform the following steps for the sample configuration for all WEGs
involved to reset the WEGs to the factory default settings.
1.
Connect the WEG to the power supply. If power is already applied,
disconnect it briefly and then re-activate power supply to the device.
2.
Within 5 seconds after connecting power pressure Mode membrane
button.
The “A” LED lights up and the Configuration mode is active.
3.
Press the Mode membrane button 1 x to select autoconfiguration procedure
2 (“Reset to Factory Default Settings”).
LED “B” lights up.
4.
Press and hold the Mode membrane button for at least 2 seconds until LED
“B” goes out.
The WEG has now been reset to the factory default settings.
8.1.2
Bridge Connection, without Access Point
Two WEGs make it easy to link two LAN segments, which each contain one or
more LAN devices. The WEGs must be configured, so that they form a bridge
connection in the ad-hoc operating mode.
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Figure 26: Bridge Connection, without Access Point
Every ETHERNET device of both LAN segments can communicate with every
other ETHERNET device in this scenario. The easiest way to conduct this
configuration is to activate the associated autoconfiguration procedure using the
Mode membrane button.
Configuration changes the IP settings!
Please note that the configuration described below will also change the IP
configuration of the devices (see Section “Configuration using the Mode
Membrane Button”).
Upon conclusion of the autoconfiguration, the Web-based Management System of
each WEG can be accessed under the new IP configuration.
8.1.2.1
Configuration of the 1st WEG Using the Mode Membrane Button
1.
Activate the Configuration mode by pressing the Mode membrane button
1 x within 5 s after restarting the device.
(If an extended period of time has passed since the last restart, disconnect
the power from the device, reconnect it and then press the Mode membrane
button.)
The “A” LED lights up and the Configuration mode is active.
2.
Press the Mode membrane button 3 x.
LED “C” lights up.
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3.
Appendix
53
Press and hold the Mode membrane button for at least 2 seconds until
LED “C” begins flashing.
This WEG is now in the operating mode “Wait for automatic configuration”,
which remains active for about 5 minutes.
8.1.2.2
Configuration of the 2nd WEG Using the Mode Membrane Button
1.
Activate the Configuration mode by pressing the Mode membrane button
1 x within 5 s after restarting the device.
(If an extended period of time has passed since the last restart, disconnect
the power from the device, reconnect it and then press the Mode membrane
button.)
The “A” LED lights up and the Configuration mode is active.
2.
In the Configuration mode press the Mode membrane button 4 x.
The “A” and “C” LEDs light up.
3.
Press and hold the Mode membrane button for at least 2 seconds until LED
“A” and “C” begin flashing.
The WEG now attempts to set up a link to the 1st WEG.
Once this link has been established successfully, the 2nd WEG will configure the
1st WEG.
Both devices then carry out a restart and re-establish a wireless link automatically.
Successful autoconfiguration and establishing of a wireless link is indicated by the
permanently lit blue link LED “(((.)))” on the top of both devices.
8.1.2.3
Configuration of the WEGs Using WBM
As an alternative to using the Mode membrane button, the WBM can also be used
to configure a bridge connection without access point. However, it typically takes
longer to adjust settings as required. For example, it may be necessary to select
the IP addresses of the WEG manually to avoid IP address conflicts.
Configure the 1st WEG by logging into the WBM and choosing your settings
according to the table below.
Table 24: Bridge connection, settings for 1st WEG
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.110”
Any subnet mask, e.g., “255.255.255.0”
“Static”
Any SSID. This setting must be identical for both
WEGs.
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Table 24: Bridge connection, settings for 1st WEG
Parameter
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Value
“Ad-Hoc”
Any channel. This setting must be identical for both
WEGs.
Any settings identical for both WEGs. Additional
Wireless LAN Settings > parameter may need to be configured depending on
the Security Mode settings. Security Mode
Security
“WEP128” and selection of a secure passkey is
(multiple parameters)
recommended.
Wireless LAN Settings >
“ETHERNET Bridge”
Mode
Wireless LAN Settings >
IP address of the 2nd WEG
IP Address
Wireless LAN Settings >
Any setting identical for both WEGs, e.g., “7”
UDP Port
Configure the 2nd WEG by logging into the WBM and choosing your settings
according to the table below.
Table 25: Bridge connection, settings for 2nd WEG
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
IP Address
Wireless LAN Settings >
UDP Port
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.111”
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
IP address of the 1st WEG
Same as the setting for the 1st WEG
Manual
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8.1.3
Appendix
55
Bridge Connection, with Access Point
An access point can also be used to establish a bridge connection between WEGs.
A distinction should be made between two cases:
8.1.3.1
1.
WEGs and access point are only connected to each other wirelessly.
2.
There is a cable connection between a WEG and the access point.
WEGs and Access Point wirelessly connected
This scenario is similar to a bridge connection without access point. Both
ETHERNET segments, in which the WEGs are located, are connected to each
other by the bridge connection. If the access point is in a third ETHERNET
segment, then this is not included here, i.e. ETHERNET devices connected to the
access point by cable cannot communicate with devices of the two ETHERNET
segments connected by the bridge connection.
Figure 27: Bridge connection, connected wirelessly with access point
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Configure the 1st WEG by logging into the WBM and choosing your settings
according to the table below.
Table 26: Bridge connection via access point, settings for 1st WEG
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
IP Address
Wireless LAN Settings >
UDP Port
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.110”
Any subnet mask, e.g., “255.255.255.0”
“Static”
SSID of the access point.
“Infrastructure”
“0 = Auto (Default)”
Security settings of the access point
“ETHERNET Bridge”
IP address of the 2nd WEG
Any setting identical for both WEGs, e.g., “7”
Manual
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Appendix
57
Configure the 2nd WEG by logging into the WBM and choosing your settings
according to the table below.
Table 27: Bridge connection via access point, settings for 2nd WEG
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
IP Address
Wireless LAN Settings >
UDP Port
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.111”
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
IP address of the 1st WEG
Same as the setting for the 1st WEG
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Appendix
8.1.3.2
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Cable Connection between WEG and Access Point
In this scenario, a WEG is in the same ETHERNET segment as the access point
and can communicate with it via cable connection. Therefore, the other WEG only
needs to be configured to establish a radio link.
Figure 28: Bridge connection, cable connection with access point
Configure the WEG in the ETHERNET segment of the access point by logging
into the WBM and choosing your settings according to the table below.
Table 28: Bridge connection, settings for wired WEG
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
IP Address
Wireless LAN Settings >
UDP Port
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.110”
Any subnet mask, e.g., “255.255.255.0”
“Static”
(empty)
(any)
(any)
(any)
“ETHERNET Bridge”
IP address of the 2nd WEG
Any setting identical for both WEGs, e.g., “7”
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Appendix
59
Configure the other WEG by logging into the WBM and choosing your settings
according to the table below.
Table 29: Bridge connection, settings for the WEG without cable connection
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
IP Address
Wireless LAN Settings >
UDP Port
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.111”
Same as the setting for the 1st WEG
Same as the setting for the 1st WEG
SSID of the access point.
“Infrastructure”
“0 = Auto (Default)”
Security settings of the access point
Same as the setting for the 1st WEG
IP address of the 1st WEG
Same as the setting for the 1st WEG
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Appendix
8.1.4
WAGO-I/O-SYSTEM 758
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Direct Connection, without Access Point
WEGs can be used to connect several LAN devices in an ad-hoc WLAN. If one
WEG is connected per LAN device, the WEGs can be configured for direct
connection. In this scenario, all LAN devices integrated in the WLAN via WEG
can communicate with each other and with any other WLAN subscribers.
Figure 29: Direct Connection, without Access Point
Manual
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Appendix
61
To implement this configuration, use the WBM to enter the settings described
below for all WEGs.
Table 30: Direct connection, without access point, configuration
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.110”. This parameter is only required
when IP Assignment is set to “Static”.
Any subnet mask that covers the range of IP
addresses of all devices in the planned network, e.g.,
“255.255.255.0”
“Static” when the IP address is to be set manually. If
a DHCP server is active in the network, “DHCP
Client” or “DHCP Client & DHCP Relay” can be set
instead.
Any SSID identical for all WEGs
“Ad-Hoc”
Any channel. This setting must be identical for all
WEGs.
Any settings identical for all WEGs. Additional
Wireless LAN Settings > parameters may need to be configured depending on
the Security Mode settings. Security Mode
Security
“WEP128” and selection of a secure passkey is
(multiple parameters)
recommended.
Wireless LAN Settings >
“Client Mode”
Mode
Wireless LAN Settings > ETHERNET MAC address of the LAN device
connected to the WEG directly
WLAN MAC Address
Additional devices can be easily added to the resulting WLAN. However, the
more WLAN subscribers, the less bandwidth is available to each individual
subscriber. This effect is less pronounced when the WLAN is managed by an
access point.
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8.1.5
WAGO-I/O-SYSTEM 758
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Direct Connection, with Access Point
WEGs can be used to integrate LAN devices in a WLAN managed by an access
point. If one WEG is connected per LAN device, the WEGs can be configured for
direct connection. In this case, the WEG acts as a wireless adapter. When there is
a radio link, the respective LAN device can communicate with all other LAN or
WLAN devices in the network of the access point.
Figure 30: Direct Connection, with Access Point
Manual
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Appendix
63
To implement this configuration, use the WBM to enter the settings described
below for each WEG used as a wireless adapter.
Table 31: Direct connection, with access point, configuration
Parameter
Network Settings >
IP Address
Network Settings >
Subnet Mask
Network Settings >
IP Assignment
Wireless LAN Settings >
Network Name (SSID)
Wireless LAN Settings >
Operating Mode
Wireless LAN Settings >
Channel
Wireless LAN Settings >
Security
(multiple parameters)
Wireless LAN Settings >
Mode
Wireless LAN Settings >
WLAN MAC Address
Value
Any unique IP address in the planned network, e.g.,
“192.168.1.110”. This parameter is only required
when IP Assignment is set to “Static”.
Any subnet mask that covers the range of IP
addresses of all devices in the planned network, e.g.,
“255.255.255.0”.
“Static” when the IP address is to be set manually. If
a DHCP server is active in the network, “DHCP
Client” or “DHCP Client & DHCP Relay” can be set
instead.
SSID of the access point
“Infrastructure”
“0 = Auto (Default)”
Security settings of the access point
“Client Mode”
ETHERNET MAC address of the LAN device
connected to the WEG directly
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8.2
Appendix
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Time Response
In automation applications, there may be data transmission time response
requirements. If automation devices are not connected to each other directly by
cable but indirectly via a communication system, it should first be checked if the
transmission properties of the communication system are suitable for the
application.
The time response can be characterized with the following parameters:
Table 32: Time Response Parameters
Parameter Description
Latency
Property of the communication system:
Time that the communication system needs to deliver a message
from device A to device B.
Response
time
Application requirement:
Time it can take to transmit a message from A to B.
Property of the communication system:
Time that the communication system needs to deliver a message
from device A to device B and to return a response message
immediately generated by device B to device A.
Application requirement:
Time permitted between sending a message and receiving a
response.
Cycle time Property of the communication system:
Time that the communication system needs after receiving a
message from device A before it can accept another message for
transmission.
Application requirement:
Time after sending a message at which the next message can be
sent.
The transmission of data by radio changes the time response to the effect that
latency, response and cycle time are higher compared to a direct cable connection.
A communication system is then suitable for an application without limitation
when lower latency, response and cycle times than required by the application are
guaranteed.
A communication system is conditionally suitable for an application when lower
latency, response and cycle times than required by the application are normally
possible.
The following table shows typical and maximum values for the time response that
can be expected when using WEGs.
Manual
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Appendix
Table 33: Time Responses of the WEG
Parameter
Latency, typical1)
Response time, typical1)
Cycle time, typical1)
Latency, maximum2)
Response time, maximum2)
Cycle time, maximum2)
1)
2)
Value
2 ms
3 ms
2 ms
20 ms
40 ms
20 ms
Typical: The specified time values are not exceeded in 99% of all messages sent.
Maximum: The specified time values are not exceeded in 99.9% of all messages sent.
Interference from other radio systems can worsen time responses!
Other radio systems that transmit data at the same time and frequency can
significantly affect the time response. The time response described cannot be
achieved when the frequency range used experiences interference over a longer
period of time. Therefore, take suitable measures to optimize coexistence.
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8.3
Appendix
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Data Rate
In general, communication systems can only communicate with limited
bandwidth. Depending on the technology used, the configuration of the devices
involved and external circumstances, the data rates for transmission are limited to
specific values.
When using wireless communication systems, the following factors contribute to
reducing the achievable data rate:
Table 34: Factors That Impact Data Rates
Factor
No. of
subscribers
Signal quality
Protocol
efficiency
Description
The more communicating devices, the lower the bandwidth
available for the individual device.
If the signal is week or poor, modulation methods must be
used that permit slow data rates, but a more stable
connection.
Depending on the protocol, administrative data must be
transmitted in addition to user data. The proportion of user
data in regards to the total volume of data to be transmitted is
a measure for protocol efficiency.
The following table shows example values for the data rate to be expected when
using WEGs in the configuration concerned.
Table 35: Maximum data rate, example values
Operating mode
LAN
Direct Connection
Direct Connection
Direct Connection
Bridge Connection
Direct Connection
Direct Connection
Bridge Connection
WLAN
Infrastructure
Infrastructure
Ad-hoc
Ad-hoc
Infrastructure
Ad-hoc
Ad-hoc
Subscriber
(Qty)
1
2
2
2
2
2
2
Signal quality
Good
Good
Good
Good
Poor
Poor
Poor
User data rate
[Mbit/s]
20
10
5
3
1
1
0.5
Manual
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8.4
Appendix
67
Coexistence
A basic understanding of the significant influencing factors is required to optimize
coexistence between different wireless technologies and/or devices. A brief
description of the essential basics is therefore given below. These are followed by
specific instructions for appropriate configuration of the WEG to conduct
optimization of coexistence tailored to your particular application.
8.4.1
Basics
Interference occurs when signals of different transmitters collide in regards to
frequency, location and time. This can cause one or all interfering radio
transmissions to be interrupted. To minimize the risk of mutual interference,
suitable coexistence measures must be taken. The following basic multiplex
techniques are employed to ensure interference-free coexistence.
1.
Time-Division Multiplex
Different devices must transmit simultaneously in order for a disturbance of
two or more transmission signals to occur. At low traffic volumes,
considerably more devices located near one another can be operated before
a disturbance occurs.
2.
Code Multiplex
Even if radio signals are transmitted at the same time at the same location
and in the same frequency range, the signals can be differentiated and sorted
out at the receiving device on the basis of the codes (or frequency splitting
techniques) that are used.
3.
Space-Division Multiplex
As wireless technologies may only operated with limited transmitting power
in the ISM band, the transmitted signals become so weak at a certain
distance that they no longer interfere with other devices.
4.
Frequency-Division Multiplex
Radio signals that use clearly isolated frequencies do not interfere with one
another.
Availability of the multiplexing techniques presented here to the user does,
however, vary to substantially different degrees.
1, for example, is essentially determined by the communicating applications.
Although consideration can be given in the development of the application to
ensuring that only important data is transmitted and that there is no steep increase
in data traffic under critical conditions in particular, the stipulated process-based
limits are nevertheless always tight.
The method explained under 2 is employed automatically by the wireless
technologies involved; options for adaptation by the user are not given and would
not be practical in any event.
The techniques described under 3 and 4 can, on the other hand, be easily
integrated in a frequence utilization plan. Spatial distribution of devices taking
part in wireless communication can easily be planned. Taking into consideration
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the structural conditions, in particular of fire protection walls or other “absorber”
obstacles, mutual interference can be completely ruled out. Frequency-division
multiplexing can be employed when clear, spatial separation is not possible. Some
technologies even enable the user to specify set frequency ranges to allow them to
be reserved exclusively for certain devices. Other technologies monitor the
frequency band being used and automatically avoid ranges already experience
intensive use.
8.4.2
Optimizing the Device Configuration
To minimize the risk of mutual interference between radio systems, make the
following adjustments to the device configuration:
•
If only a short distances has to be bridged within a radio system, limit the
maximum transmit power.
•
There should be as many walls or ceilings between the subscribers of
different radio systems as possible while subscribers of the same radio
system should be separated by as few structures as possible.
•
Neighboring radio systems should use different frequency ranges when
possible.
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Range in Open Field
The maximum distance that can be overcome by a radio link is defined by the
following factors:
1.
Input Sensitivity
This denotes the capability of the device hardware to detect the radio signal
transmitted by the remote device. The greater the sensitivity, the more
weaker signals that can be received.
 This is a permanent device property.
2.
Transmitting Power
This denotes the signal strength which the device hardware outputs/can
output for transmitting.
 The maximum transmitting power for the WEG can be set as a
parameter. Transmitting power should be set to the highest level for the
maximum range.
3.
Antenna Gain
This factor denotes the focusing or bundling properties of the antenna. An
antenna with high antenna gain exhibits a strong alignment characteristic,
i.e., depending on the antenna alignment, only highly amplified or
extremely attenuated signals can be received.
 The internal antenna of the WEG possesses an antenna gain of 5 dBi,
meaning that the reception properties can be greatly influenced by
correct alignment. Best results are achieved when the antenna (front
side of device) is facing exactly in the direction from which the radio
signals are being received.
4.
Ambient Conditions
This factor deals with the physical environment/area around the wireless
system. To achieve the maximum range a line-of-sight link should exist
between the devices and there should be no objects present along the direct
line-of-sight link within a specified radius (the so-called 1st Fresnel zone see figure below). If this zone is even only partially blocked by any objects
the achievable range can quickly be cut in half.
Figure 31: Fresnel zone
The shape of the 1st Fresnel zone is roughly an ellipse whose largest diameter
(twice the radius of the 1st Fresnel zone) is at precisely half the distance.
The table below lists the radii that are to be kept clear:
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Table 36: Radii to be kept clear
Distance
100 m
200 m
300 m
400 m
Radius for 1st Fresnel zone
1.7 m
2.5 m
3.0 m
3.5 m
Range can be affected by other wireless systems!
Other range-influencing factors that are difficult to detect and rule out exist in the
spurious irradiation from other wireless systems and/or in a temporal change of
the radio channel, for example when the subscriber moves (swaying of the mast in
strong wind), or other changes in ambient conditions (vehicles, movement of
stored goods, pedestrians). These factors can make a precise prediction of the
maximum range extremely difficult.
Effective path of radio waves is more significant than the actual distance!
Overcoming of maximum distances for a line-of-sight link is a scenario
completely different from use inside rooms or in the direct vicinity to competing
wireless technologies. In these types of scenarios the decisive factor is frequently
not the actual distance between the devices, but, rather, the effective path taken by
the radio waves for multipath propagation, along with the actual interference
present at the exact installation location. Under some circumstances, signal
quality may even be enhanced by increasing the distance between the devices.
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Data Security for Radio Transmission
It is often assumed that wireless communication systems are less secure than lineconnected systems. When used and operated correctly, wireless systems offer at
least an equivalent level of security.
The following conditions must apply before an unauthorized user can obtain
access to data exchanged via wireless communication:
1. The attacker must be familiar with the communication system in use and be
within the operating range of the system.
2. Radio transmission must take place without the use of any security
mechanisms offered by this technology or the attacker must have adequate
means to determine the security code.
To minimize security risks, choose the best security mechanisms available in the
respective configuration such as:
•
In an ad-hoc network, use “WEP128” encryption and choose the strongest
passkey possible.
•
In an infrastructure network in which various WLAN devices are used, use
the “WPA2-PSK (AES)” security setting and choose the strongest passkey
possible.
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List of Figures
Figure 1: Wireless transmission between two WEGs ........................................... 13
Figure 2: Infrastructure mode ................................................................................ 14
Figure 3: Ad-hoc mode.......................................................................................... 14
Figure 4: View ....................................................................................................... 16
Figure 5: Marking on front of device .................................................................... 17
Figure 6: Marking on bottom ................................................................................ 17
Figure 7: Nameplate on back/side ......................................................................... 17
Figure 8: Connections at bottom of device ........................................................... 18
Figure 9: Aligning the device ................................................................................ 19
Figure 10: Antenna diagram 2.45 GHz – longitudinal axis .................................. 20
Figure 11: Antenna diagram 2.45 GHz – transverse axis...................................... 20
Figure 12: Display elements .................................................................................. 21
Figure 13: Operating element ................................................................................ 23
Figure 14: Drilled holes for attaching the WEG ................................................... 29
Figure 15: Connecting the WEG ........................................................................... 30
Figure 16: Mode membrane button and status LEDs ............................................ 33
Figure 17: Flow chart ............................................................................................ 35
Figure 18: WBM main page before login ............................................................. 40
Figure 19: WBM main page after login ................................................................ 41
Figure 20: WBM section “Access Management” ................................................. 42
Figure 21: WBM section “System Overview” ...................................................... 42
Figure 22: WBM section “Network Settings” ....................................................... 43
Figure 23: WBM section “Wireless LAN Settings” ............................................. 45
Figure 24: WBM section “Miscellaneous” ........................................................... 48
Figure 25: Text area “AT Commands” ................................................................. 49
Figure 26: Bridge Connection, without Access Point ........................................... 52
Figure 27: Bridge connection, connected wirelessly with access point ................ 55
Figure 28: Bridge connection, cable connection with access point ...................... 58
Figure 29: Direct Connection, without Access Point ............................................ 60
Figure 30: Direct Connection, with Access Point ................................................. 62
Figure 31: Fresnel zone ......................................................................................... 69
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List of Tables
Table 1: Revision History........................................................................................ 5
Table 2: Number notation........................................................................................ 8
Table 3: Font conventions ....................................................................................... 8
Table 4: Legend for the “View” figure ................................................................. 16
Table 5: Legend for the “Connections at bottom of device” figure ...................... 18
Table 6: Power supply, M12 Connector on Device .............................................. 18
Table 7: System connection, M12 Socket on Device ............................................ 18
Table 8: Legend for the “Display elements” figure .............................................. 21
Table 9: Technical Data – General Device Data ................................................... 24
Table 10: Technical Data – ETHERNET Interface............................................... 25
Table 11: Technical Data – Radio Interface .......................................................... 25
Table 12: Technical Data – Power Supply ............................................................ 25
Table 13: Selection of Installation Location ......................................................... 28
Table 14: Default Settings ..................................................................................... 32
Table 15: Autoconfiguration Procedures .............................................................. 36
Table 16: Overwriting of Configuration ............................................................... 37
Table 17: WBM section “System Overview” ....................................................... 43
Table 18: WBM section “Network Settings > IP configuration” .......................... 44
Table 19: WBM section “Wireless LAN Settings > Network”............................. 45
Table 20: WBM section “Wireless LAN Settings > General” .............................. 46
Table 21: WBM section “Wireless LAN Settings > Security” ............................. 46
Table 22: WBM section “Wireless LAN Settings > Client Mode” ...................... 47
Table 23: AT Commands ...................................................................................... 50
Table 24: Bridge connection, settings for 1st WEG .............................................. 53
Table 25: Bridge connection, settings for 2nd WEG ............................................ 54
Table 26: Bridge connection via access point, settings for 1st WEG ................... 56
Table 27: Bridge connection via access point, settings for 2nd WEG .................. 57
Table 28: Bridge connection, settings for wired WEG ......................................... 58
Table 29: Bridge connection, settings for the WEG without cable connection .... 59
Table 30: Direct connection, without access point, configuration ........................ 61
Table 31: Direct connection, with access point, configuration ............................. 63
Table 32: Time Response Parameters ................................................................... 64
Table 33: Time Responses of the WEG ................................................................ 65
Table 34: Factors That Impact Data Rates ............................................................ 66
Table 35: Maximum data rate, example values ..................................................... 66
Table 36: Radii to be kept clear............................................................................. 70
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