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WAGO 750-921 User manual

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Manual
WAGO-I/O-SYSTEM 750
Bluetooth
®
Adapter
750-921
Accessories
Version 2.0.1, applicable from FW Version 02
2 WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
© 2014 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: +49 (0) 571/8 87 – 0
Fax: +49 (0) 571/8 87 – 1 69
E-Mail: [email protected]
Web: http://www.wago.com
Technical Support
Phone: +49 (0) 571/8 87 – 5 55
Fax: +49 (0) 571/8 87 – 85 55
E-Mail: [email protected]
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: [email protected]
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.
WAGO-I/O-SYSTEM 750 Table of Contents 3
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
Table of Contents
1 Notes about this Documentation ................................................................. 6
1.1 Validity of this Documentation ................................................................. 6
1.2 Copyright ................................................................................................... 6
1.3 Symbols ..................................................................................................... 7
1.4 Number Notation ....................................................................................... 9
1.5 Font Conventions ...................................................................................... 9
2 Important Notes ......................................................................................... 10
2.1 Legal Bases ............................................................................................. 10
2.1.1 Subject to Changes ............................................................................. 10
2.1.2 Personnel Qualifications ..................................................................... 10
2.1.3 Use of the 750 Series in Compliance with Underlying Provisions .... 10
2.1.4 Technical Condition of Specified Devices ......................................... 10
2.2 Safety Advice (Precautions) .................................................................... 11
3 Device Description ..................................................................................... 13
3.1 View ........................................................................................................ 14
3.2 Display Elements .................................................................................... 15
3.3 Technical Data ........................................................................................ 16
3.3.1 Device ................................................................................................. 16
3.3.2 Bluetooth
®
Communication ................................................................ 16
3.4 Approvals ................................................................................................ 17
4 Function Description ................................................................................. 18
4.1 Radio Interface ........................................................................................ 19
4.1.1 SPP Service “DATA” ......................................................................... 19
4.1.2 SPP Service “CONFIG” ..................................................................... 20
4.2 AT Command Interface ........................................................................... 20
4.3 Factory Settings ....................................................................................... 22
4.4 Operating Modes ..................................................................................... 23
4.5 Security Settings for the Radio Communications Interface .................... 24
4.5.1 Visibility and Connectivity................................................................. 24
4.5.2 Encryption .......................................................................................... 25
4.5.3 Authentication .................................................................................... 25
4.6 Special Coexistence Properties ............................................................... 28
5 Connect Devices ......................................................................................... 30
5.1 Plug in WSA ........................................................................................... 30
5.2 Unplug WSA ........................................................................................... 31
6 Configuration ............................................................................................. 32
6.1 AT Command Interface ........................................................................... 32
6.1.1 Using the AT Command Interface ..................................................... 32
6.1.2 Opening the Command Interface........................................................ 33
6.1.3 Basic Structure of an AT Command .................................................. 34
6.1.4 Basic Structure of Replies to AT Commands..................................... 34
6.1.5 Effectiveness of AT Commands ......................................................... 35
7 Commissioning ........................................................................................... 37
4 Table of Contents WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
7.1 Set Up Bluetooth
®
Connection ................................................................ 37
7.1.1 Example: Connect PC to a WSA ........................................................ 37
7.1.2 Example: Set up a Connection between 2 WSAs ............................... 43
7.2 Use Established Connection on the PC ................................................... 43
7.2.1 Example: Set up a Configuration Connection using HTerm .............. 43
7.2.2 Example: Set Up a Data Connection Using WAGO-I/O-CHECK ..... 45
7.3 Example: Establish a Connection between 2 WSAs ............................... 46
8 Reference AT Commands ......................................................................... 47
8.1 AT ........................................................................................................... 47
8.2 Group “AT BTID”: Identifiers ................................................................ 47
8.2.1 AT BTID ? .......................................................................................... 47
8.2.2 AT BTID ADR ? ................................................................................ 47
8.2.3 AT BTID COD ................................................................................... 47
8.2.4 AT BTID HELP ................................................................................. 48
8.2.5 AT BTID NAME ................................................................................ 48
8.3 Group “AT BTSEC”: Security ................................................................ 49
8.3.1 AT BTSEC ADEV ............................................................................. 49
8.3.1.1 AT BTSEC ADEV ADD = <Device> ........................................... 49
8.3.1.2 AT BTSEC ADEV DEL = <Index> .............................................. 50
8.3.1.3 AT BTSEC ADEV CLEAR .......................................................... 50
8.3.2 AT BTSEC AUTH ............................................................................. 50
8.3.3 AT BTSEC HELP .............................................................................. 50
8.3.4 AT BTSEC INQ ................................................................................. 51
8.3.5 AT BTSEC PAG ................................................................................ 51
8.3.6 AT BTSEC PIN .................................................................................. 51
8.3.7 Subgroup “AT BTSEC TRUSTED" .................................................. 52
8.3.7.1 AT BTSEC TRUSTED ? ............................................................... 52
8.3.7.2 AT BTSEC TRUSTED DEL = <Index> ....................................... 52
8.3.7.3 AT BTSEC TRUSTED CLEAR ................................................... 52
8.4 Group “AT CON”: Configuration of Outbound Connections ................ 52
8.4.1 AT CON AUTO ................................................................................. 52
8.4.2 AT CON CLOSE ................................................................................ 53
8.4.3 AT CON HELP .................................................................................. 53
8.4.4 AT CON OPEN .................................................................................. 53
8.4.5 Subgroup “AT CON RETRY” ........................................................... 53
8.4.5.1 AT CON RETRY = <Reconnect Cycle> ...................................... 53
8.4.5.2 AT CON RETRY ? ........................................................................ 53
8.4.5.3 AT CON RETRY CYCLE ............................................................ 53
8.4.5.4 AT CON RETRY ENA ................................................................. 54
8.4.6 AT CON TAR .................................................................................... 54
8.4.6.1 AT CON TAR ADR ...................................................................... 54
8.4.6.2 AT CON TAR CLEAR ................................................................. 55
8.4.6.3 AT CON TAR PIN ........................................................................ 55
8.4.6.4 AT CON TAR PORT .................................................................... 55
8.5 Group “AT ECO”: Coexistence Settings ................................................ 55
8.5.1 Subgroup “AT ECO BLK” ................................................................. 55
8.5.1.1 AT ECO BLK ................................................................................ 55
8.5.1.2 AT ECO BLK 15.4 = <Channels> ................................................ 56
8.5.1.3 AT ECO BLK BT <Channels> ..................................................... 56
8.5.1.4 AT ECO BLK WIFI = <Channels> ............................................... 56
WAGO-I/O-SYSTEM 750 Table of Contents 5
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
8.5.1.5 AT ECO BLK CLEAR .................................................................. 56
8.5.2 AT ECO ENA..................................................................................... 56
8.5.3 AT ECO HELP ................................................................................... 57
8.5.4 AT ECO INQ ...................................................................................... 57
8.5.5 AT ECO TXPWR ? ............................................................................ 57
8.5.5.1 AT ECO TXPWR DEF ................................................................. 57
8.5.5.2 AT ECO TXPWR MAX ................................................................ 57
8.6 AT HELP ................................................................................................ 58
8.7 AT INFO ................................................................................................. 58
8.8 Group “AT INQ”: Search for SPP Devices within Range ...................... 58
8.8.1 AT INQ ............................................................................................... 58
8.8.2 AT INQ COD ..................................................................................... 59
8.8.3 AT INQ COUNT ................................................................................ 59
8.8.4 AT INQ START ................................................................................. 59
8.9 AT LOGOUT .......................................................................................... 59
8.10 AT RESET .............................................................................................. 60
8.11 Group “AT RDEV": Devices within Range ........................................... 60
8.11.1 AT RDEV FOUND ? ......................................................................... 60
8.11.2 AT RDEV FOUND NAMES ? .......................................................... 60
8.11.3 AT RDEV HELP ................................................................................ 60
8.11.4 AT RDEV NAME <Device> ............................................................. 60
8.11.5 Subgroup “AT RDEV PORT”............................................................ 61
8.11.5.1 AT RDEV PORT INDEX <Target Device> ................................. 61
8.11.5.2 AT RDEV PORT NAME <Device> ............................................. 61
8.12 Group “AT STATUS”: Version and Status Information ........................ 61
8.12.1 AT STATUS CON ? .......................................................................... 61
8.12.2 AT STATUS HWVERS ? .................................................................. 62
8.12.3 AT STATUS SERIAL ? ..................................................................... 62
8.12.4 AT STATUS STATS ? ....................................................................... 62
8.12.5 AT STATUS SWVERS ? ................................................................... 63
8.12.6 AT STATUS UPTIME ? .................................................................... 63
8.13 Group “AT SYS”: Output Format, Factory Default Settings ................. 63
8.13.1 AT SYS CFG CLEAR........................................................................ 63
8.13.2 AT SYS ECHO................................................................................... 63
8.13.3 AT SYS HELP ................................................................................... 64
8.13.4 AT SYS OUTPUT .............................................................................. 64
8.13.5 AT SYS USRSTR .............................................................................. 64
8.14 Group “AT UART": Serial Interface Parameters.................................... 65
8.14.1 AT UART ........................................................................................... 65
8.14.2 AT UART BAUD............................................................................... 65
8.14.3 AT UART HELP ................................................................................ 65
8.14.4 AT UART PAR .................................................................................. 65
8.14.5 AT UART STOPB ............................................................................. 66
Glossary ................................................................................................................ 67
List of Figures ...................................................................................................... 72
List of Tables ........................................................................................................ 73
6 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
1 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 accessory 750-921 Bluetooth
®
Adapter for the WAGO-I/O-SYSTEM 750 series.
This documentation is only applicable from FW Version 02.
This documentation applies to firmware version 02 and higher!
This documentation applies to Bluetooth
®
Adapter 750-921 firmware version 02
and higher. If you are using an older version of the Bluetooth
®
Adapter, please
contact WAGO Support.
The product Bluetooth
®
Adapter 750-921 shall only be installed and operated
according to the instructions in this manual and the system description for the
WAGO-I/O-SYSTEM 750.
Consider power layout of the WAGO-I/O-SYSTEM 750!
In addition to these operating instructions, you will also need the system
description for the WAGO-I/O-SYSTEM 750, which can be downloaded at
www.wago.com. There, you can obtain important information including
information on electrical isolation, system power and supply specifications.
1.2 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.
WAGO-I/O-SYSTEM 750 Notes about this Documentation 7
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
1.3 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.
8 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
Additional Information:
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).
WAGO-I/O-SYSTEM 750 Notes about this Documentation 9
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
1.4 Number Notation
Table 1: Number Notation
Number code
Example
Note
Decimal
100
Normal notation
Hexadecimal
0x64
C notation
Binary
'100'
'0110.0100'
In quotation marks, nibble separated with
dots (.)
1.5 Font Conventions
Table 2: Font Conventions
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]
10 Important Notes WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
2 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 Qualifications
All sequences implemented on WAGO-I/O-SYSTEM 750 devices may only be
carried out by electrical specialists with sufficient knowledge in automation. The
specialists must be familiar with the current norms and guidelines for the devices
and automated environments.
All changes to the coupler or controller should always be carried out by qualified
personnel with sufficient skills in PLC programming.
2.1.3 Use of the 750 Series in Compliance with Underlying
Provisions
The component has been developed for use in an environment that meets the IP20
protection class criteria. Protection against finger injury and solid impurities up to
12.5 mm diameter is assured; protection against water damage is not ensured.
Unless otherwise specified, operation of the components in wet and dusty
environments is prohibited.
2.1.4 Technical Condition of Specified Devices
The devices 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 devices.
Please send your request for modified and new hardware or software
configurations directly to WAGO Kontakttechnik GmbH & Co. KG.
WAGO-I/O-SYSTEM 750 Important Notes 11
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
2.2 Safety Advice (Precautions)
For installing and operating purposes of the relevant device to your system the
following safety precautions shall be observed:
Do not work on devices while energized!
All power sources to the device shall be switched off prior to performing any
installation, repair or maintenance work.
Installation only in appropriate housings, cabinets or in electrical operation
rooms!
The WAGO-I/O-SYSTEM 750 and its components are an open system. As such,
install the system and its components exclusively in appropriate housings,
cabinets or in electrical operation rooms. Allow access to such equipment and
fixtures to authorized, qualified staff only by means of specific keys or tools.
Replace defective or damaged devices!
Replace defective or damaged device/module (e.g., in the event of deformed
contacts), since the long-term functionality of device/module involved can no
longer be ensured.
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.
Clean only with permitted materials!
Clean soiled contacts using oil-free compressed air or with ethyl alcohol and
leather cloths.
12 Important Notes WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
Do not use any contact spray!
Do not use any contact spray. The spray may impair contact area functionality in
connection with contamination.
Do not reverse the polarity of connection lines!
Avoid reverse polarity of data and power supply lines, as this may damage the
devices involved.
Avoid electrostatic discharge!
The devices are equipped with electronic components that may be destroyed by
electrostatic discharge when touched. Please observe the safety precautions
against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the
devices, please ensure that environmental factors (personnel, work space and
packaging) are properly grounded.
WAGO-I/O-SYSTEM 750 Device Description 13
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
3 Device Description
The Bluetooth
®
Adapter (750-921) is a serial Bluetooth
®
adapter. As a wireless
serial adapter (WSA), the device establishes a wireless connection between
WAGO-I/O-SYSTEM 750 Fieldbus Couplers/Programmable Logic Controllers
(PLCs) or 857 Series Transducers and external Bluetooth
®
devices (e.g., tablet
PCs, smartphones or standard PCs with a Bluetooth
®
interface).
As a cable replacement, the WSA simplifies communication with WAGO
software (WAGO-I/O-CHECK, WAGO-I/O-PRO, etc.).
The WSA is plugged into the service interface of the fieldbus coupler/WAGO
PLC or transducer for the entire configuration period. The WSA is powered by the
service interface, i.e., via the power supply of the fieldbus coupler/WAGO PLC or
transducer.
If required, the adapter may be configured via AT commands.
A blue LED indicates the WSA's operating and connection status.
A label with item and serial number is mounted on the back of the WSA.
14 Device Description WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
3.1 View
Figure 1: View
Table 3: Legend for the “View” Figure
Nr.
Description
1
Status LED
2
Label with item- and serial-number (backside)
3
Female connector for configuration interface
WAGO-I/O-SYSTEM 750 Device Description 15
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
3.2 Display Elements
Table 4: Display Element
LED
Status*
Description
Blue
Static OFF
No power supply, not ready for operation
Single flash, approx. 0.3 Hz
Ready for use, no existing wireless
connection
Rapid alternating flash,
approx. 4 Hz
Connect or device discovery
Static ON
Existing wireless connection and connection
to a (terminal) program established
Flicker
Data exchange
Single flash, approx. 1 Hz
Ready for use, no existing wireless
connection. Can switch modes.
Double flash, approx. 1 Hz
Selected “AutoConnect” operating mode is
prepared. Can switch modes.
Triple flash, approx. 1 Hz
Selected “Reset to factory settings”
operating mode is prepared. Can switch
modes.
Slow alternating flash,
approx. 0.5 Hz
“AutoConnect” operating mode enabled
*Key
Flash Types
LED Flashing Patterns
Single/double/triple flash
1/2/3 x short bright, long dim
Rapid/slow alternating flash
Bright, dark
Flicker
Short dim, otherwise bright
16 Device Description WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
3.3 Technical Data
3.3.1 Device
Table 5: Technical Data – Device
Dimensions (W x H x L) mm
15 x 50 x 19
Weight
Approx. 7 g
Connections
4-pin connection for the service interface for
WAGO fieldbus couplers and PLCs of the
WAGO-I/O-SYSTEM 750
Baud rates
9600, 19200, 38400, 57600, 115200
Configuration
AT commands (e.g. via HyperTerminal)
Indicators
Blue LED for operating connection status
Operating temperature
-20 °C ... 60 °C
Current consumption (internal)
Max. 60 mA
3.3.2 Bluetooth
®
Communication
Table 6: Technical Data – Bluetooth
®
Communication
Bluetooth
®
Version
2.1
Radio class / range of transmission
Class 2 / max. 20 m
Antenna
Integrated
RF output power
Max. +4 dBm
RF input sensitivity
Typ. -82 dBm
Frequency range
2.402 … 2.483 GHz (ISM band)
Type of communication
Point-to-point connection
Profiles supported
Serial Port Profile (SPP)
Coexistence properties
Adaptive Frequency Hopping (AFH)
Adaptive transmit power with configurable
upper limits for data exchange and device
discovery
Configurable channel blacklist for
“Frequency Hopping Spread Spectrum”
(FHSS)
Coexistence optimized device discovery
supported (media allocation < 5 %,
allocation duration < 100 ms)
Security
Bluetooth
®
security mode 4
“Secure Simple Pairing”
Encryption 128 bit
WAGO-I/O-SYSTEM 750 Device Description 17
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
3.4 Approvals
Conformity Marking
Bluetooth
®
FCC “Federal Communications Commission”
FCC ID: POOWML-C46
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.
18 Function Description WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
4 Function Description
The WSA provides wireless access to the service interface of WAGO-I/O-
SYSTEM 750 fieldbus couplers and PLCs via Bluetooth
®
Serial Port Profile
(SPP). The SPP employs two communication services “CONFIG” and “DATA”,
which use the WSA as a configuration and data connection.
If the WSA is operated in conjunction with a 750 Series WAGO PLC, a
WAGO-I/O-PRO program saved on the PLC can establish a wireless connection
or query diagnostic information.
Figure 2: WSA applications
The WSA can be configured via an AT command interface. This AT command
interface can be used to define settings that enable a radio link to be set up by
external devices. You can also define via this AT command interface that the
WSA is to actively set up a radio link to an external device.
WAGO-I/O-SYSTEM 750 Function Description 19
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
The WSA can be used without previously being configured via the AT command
interface. For this, the WSA can be switched to other special operating modes by
targeted interruption of power supply at specific intervals. In these operating
modes, processes are initiated which adapt the configuration automatically as
required. This includes discovering a further WSA automatically within the
defined range and configuring and establishing a link. A detailed description of
this “AutoConnect” function is given in the section “Operating Modes.”
4.1 Radio Interface
Most of the functions of the WSA require that a radio link exist between it and
other devices in accordance with the Bluetooth
®
SPP standard.
Refer to the documentation for the external device concerned to learn how a radio
link to the WSA is established from an external device.
You can set up a radio link from the WSA to an SPP-compatible external device
using the AT command interface, or by switching the operating mode.
The WSA offers two SPP services at the Bluetooth
®
interface:
Table 7: SPP Services
SPP Port Index
Designation
Function
1
DATA
Data exchange
2
CONFIG
Configuration
Simultaneous use of both SPP services is supported, meaning two radio links to
one external device, or one radio link each to two different external devices can
exist at the same time.
The “DATA” SPP service is the standard when links are established!
Devices compliant with the Bluetooth
®
SPP standard can select the service to
which a link is to be set up while the link is being established. Not all devices,
however, offer the user the option of selecting the SPP service. Devices which do
not offer this selection option frequently select the SPP service with the lowest
port index automatically. If a link to the WSA is set up using such a device, the
SPP service “DATA” is used.
4.1.1 SPP Service “DATA”
This feature enables access to the service interface, allowing the WSA to function
as a protocol converter.
Links set up by the WSA to an external device always utilize the “DATA” SPP
service.
20 Function Description WAGO-I/O-SYSTEM 750
750-921 Bluetooth
®
Adapter
Manual
Version 2.0.1, applicable from FW Version 02
4.1.2 SPP Service “CONFIG”
This service enables access to the AT command interface and, thus, to device
configuration. For a detailed description of this, refer to the Section “AT
Command Interface”.
4.2 AT Command Interface
Access to the AT command interface of the WSA is gained via either the service
or radio interface, but not both simultaneously.
Figure 3: Access to the AT command interface via the radio interface (SPP “CONFIG” service)
Figure 4: Access to the AT command interface via the service interface
As two simultaneous links are possible using the radio interface, the WSA's AT
command interface can be accessed via one link. At the same time, the second
link can be used to access data on fieldbus couplers/controllers or transducers.
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