Intab AirGate-Modbus Manuale utente
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 1/22
AirGate-Modbus
INSTRUCTIONS MANUAL
V1.1x C
INTRODUCTION .......................................................................................................................................................................................1
SPECIFICATIONS.......................................................................................................................................................................................2
CONNECTION AND INSTALLATION ..........................................................................................................................................................3
OPERATION..............................................................................................................................................................................................4
OPERATION MODES.................................................................................................................................................................................5
USING THE OPERATION MODES ..............................................................................................................................................................6
LONG REACH APPLICATION .....................................................................................................................................................................7
SETUP SOFTWARE....................................................................................................................................................................................8
CONFIGURATION MODES ........................................................................................................................................................................9
DETERMINATION AND SELECTION OF THE SERIAL PORT (COM) - WINDOWS.......................................................................................10
CONFIGURATIONS - AIRGATE-MODBUS ................................................................................................................................................12
DATA COMMUNICATION - SERIAL .........................................................................................................................................................13
DATA COMMUNICATION –WIRELESS ...................................................................................................................................................14
MODBUS COMMANDS ..........................................................................................................................................................................15
DESCRIPTION OF SOME REGISTERS .......................................................................................................................................................15
HOLDING REGISTERS TABLE...................................................................................................................................................................17
SUPPORTED MODBUS REGISTERS .........................................................................................................................................................17
ACCESSORIES .........................................................................................................................................................................................22
WARRANTY............................................................................................................................................................................................22
INTRODUCTION
AirGate-Modbus is an equipment with a link interface function between a network with Modbus RTU protocol about RS485 and a
wireless network with proprietary protocol about IEEE 802.15.4. Resulting from an advanced technological development, the
product stands out in many aspects, such as high performance, high connectivity and easy setup and operation. This technology is
presented as the ideal solution for applications which require flexibility and interoperability.
Its main characteristics are:
SMA connector for antenna;
2 dBi antenna;
Two connectors for one RS485 Modbus RTU interface;
USB Device (Mini-B);
Status indicator LEDs;
Button used to enter setup mode.
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 2/22
SPECIFICATIONS
COMMUNICATION CHARACTERISTICS:
Maximum transmission power: 100 mW;
Range: 1000 meters line-of-sight in open field.
Data rate: RF 250 Kbps;
Baud rate serial: 1.200 to 115.2 Kbps;
Receptor's sensibility - 92 dBm;
Setup via Software Windows®.
NETWORK AND SECURITY:
ISM Operation Band: 2.4 GHz;
DSSS Technology - Direct Sequence Spread Spectrum;
OQPSK Modulation - Offset Quadrature Phase Shift Keying;
Point-to-point, star, or tree network typologies;
15 operation channels;
Network Identifier: (PAN ID);
Data encryption: AES-CBC-128 (Advanced Encryption Standard).
CONNECTIONS:
Power source connector;
USB Device (Mini-B);
RP SMA Female connector (Plug);
Two connectors for RS485 Modbus RTU interface.
POWER SOURCE:
Voltage: from 10 to 35 Vdc;
Maximum energy consumption: 70 mA (in 24 V).
ENVIRONMENTAL CONDITIONS:
Operation Temperature: 0 to 70 °C;
Relative humidity: 80 % up to 30 ºC.
ELECTROMAGNETIC COMPATIBILITY:
EN61000-4-2, EN61000-4-3, EN61000-4-4, EN61000-4-5, EN61000-4-6, CISPR11.
PHYSICAL CHARACTERISTICS:
Weight: 110 g.
PA66 housing for DIN rail mount;
Dimensions: 99.5 x 114 x 17.5 mm.
Protection Degree: IP20
Internal protection against inversion of the power supply voltage polarity.
Wire gauge: 0.1 to 3 mm² (28 to 12 AWG). Recommended torque: 0.4 Nm
CERTIFICATES:
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 3/22
CONNECTION AND INSTALLATION
MECHANICAL INSTALLATION
AirGate-Modbus has its own enclosure, to be installed in a 35 mm trail.
For the installation in the trail, the metallic hook in the base must be located and pressed against the trail.
DIMENSIONS:
The dimensions of AirGate-Modbus are shown in Fig. 1.
Fig. 1 - Dimensions of AirGate-Modbus.
ELECTRICAL INSTALLATIONS
AirGate-Modbus has power supply connectors and serial communication interface RS485 according to Legend: Voltage supply Fig.
2.
Caution when connecting the power supply wires in AirGate-Modbus. If the positive
conductor of the power source is turned on, even if momentarily, to one of the
communication link terminals, the AirGate-Modbus may be damaged.
Fig. 2 - Power supply and communication connections of the AirGate-Modbus.
Fig. 3 shows the electrical connections needed. Terminals 1, 2 and 3 are destined for the communication with Modbus network.
These terminals are internally connected to terminals 4, 5 and 6. The terminals 7, 8 and 9 are used for AirGate-Modbus power
supply.
Fig. 2 –Electrical connections of AirGate-Modbus.
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 4/22
INSTALLATION RECOMMENDATIONS
Input conductors must go through the system plant separated from the output and power supply conductors, in grounded
conduits.
OPERATION
In the frontal panel are found an mini-B USB connector, a SMA connector for the antenna, a setup button and two LEDs for status
indication. See Fig. 4.
Fig. 3 - AirGate-Modbus frontal panel
USB
The USB interface of AirGate-Modbus is used for setup. Depending on the operation mode set, this interface can be connected to a
PC functioning as master of the Modbus RTU network.
SETUP BUTTON
When press the button, AirGate-Modbus enters setup mode and waits the configuration by the USB interface. If there is no
communication through the USB interface, after 1 minute, this will go back to normal functioning.
LEDS
When turning the equipment on, the Status LED starts to flash quickly until the AirGate-Modbus
connects to a wireless network. In the moment that the AirGate-Modbus is connected to a wireless
network, the Status LED remains turned on.
When the setup button is pressed, the Status LED flashes slowly until AirGate-Modbus quits
operation mode. There are 3 possible ways to quit setup mode:
Clicking in the setup button again;
Applying a configuration successfully;
Waiting 1 minute.
The Communication LED flashes to show that the device is receiving packages through any of its
interfaces and is forwarding correctly. The speed of the flashing is according to the communication
speed.
When the Firmware of the AirGate-Modbus is being updated, the Communication LED will start to
flash and the LED Status will be off.
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 5/22
OPERATION MODES
AirGate-Modbus can be configured with 4 different operation modes:
RS485-MASTER
Simple Forwarding between RS485 and IEEE 802.15.4
In this mode AirGate-Modbus uses the RS485 interface to communicate with a Modbus Network. And the wireless interface to
communicate with other AirGate-Modbus devices in RS485-SLAVES operation modes.
RS485-SLAVES
Simple forwarding between IEEE 802.15.4 and RS485
In this mode AirGate-Modbus has the objective of continuing the Modbus network. It uses the wireless interface to communicate
with another AirGate-Modbus, where the network master is located. The RS485 interface is used to communicate with Modbus
slaves.
As of firmware version V1.23, when operating in this mode of operation, the AirGate-Modbus can begin to automatically perform
the repeater function. This function does not require any special configuration. When configured in this mode of operation, after
the AirGate-Modbus finds a father (RS485-Master, USB-Master, Multi-Master, or even another RS485-Slaves) it then is able to offer
the option of having children, allowing other AirGates that are also operating with RS485-Slaves to automatically pair with it.
USB-MASTER
USB Routing for RS485 and IEEE 802.15.4
In this mode AirGate-Modbus uses the USB interface to communicate directly with a Modbus master and its RS485 interface to
communicate with a Modbus slave’s network. The wireless interface is used to communicate with other AirGate-Modbus devices in
RS485-SLAVES operation mode.
MULTI-MASTER
Multiplexing of the USB and RS485 for IEEE 802.15.4
In this mode AirGate-Modbus uses the RS485 and USB interfaces for the multiplexing of Modbus masters. The masters must be
directly linked to these interfaces. The wireless interface is used to communicate with other AirGate-Modbus devices in RS485-
SLAVES operation mode.
When this operation mode is used, a Timeout is needed to ensure that each of the masters have an usage time in the network. This
Timeout is automatically adjusted by DigiConfig software according to the baud rate used by the interfaces, as it can be seen in the
chapter “CONFIGURATIONS - AIRGATE-MODBUS” in the section “TIMEOUT”. Depending on the number of slaves and of the
response time of each slave, it may be necessary to adjust this Timeout to reduce possible communication errors.
It's important to emphasize that the Timeout configured for this operation mode refers to a time interval managed automatically
by the AirGate-Modbus. The network masters plugged in each one of the USB and RS485 interfaces must have their Timeouts
configured with double the time set in AirGate-Modbus Timeout.
COMPLEMENTARY MODES
Only devices with distinct functions form a wireless communication network. The operation form of some modes also imposes
connection restrictions. The modes compatible with the wireless connection may be seen in Table 1:
Mode
Connects with
RS485-MASTER
RS485-SLAVES
USB-MASTER
RS485-SLAVES
MULTI-MASTER
RS485-SLAVES
RS485-SLAVES *
RS485-SLAVES
Table 1 - Complementary modes
* The RS485-SLAVES operation mode only begins to offer the option of having children (behaving as a repeater) after having paired
with a father that is already operating on the network. This entire process is done automatically, without any intervention from the
operator.
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 6/22
USING THE OPERATION MODES
WIRELESS SEGMENTS IN ANY POINT OF AN MODBUS NETWORK
Division of a wired network in wired segments interconnected by wireless segments. The division occurs far from the Modbus
master. It uses the RS485 port AirGate-Modbus to communicate with the master and the slaves. Additional wireless segments can
be inserted. Fig. 5 illustrates this possible application.
Fig. 4 - Wireless segments in any point of a Modbus network
WIRELESS SEGMENTS CLOSE TO THE MODBUS MASTER
Division of a wired network in wired segments interconnected by wireless segments. Wireless segments located close to the
Modbus master which communicates by USB port. It allows the AirGate-Modbus using as a USB-RS485 convertor for the first wired
segment. Fig. 6 illustrates this possible application.
Fig. 5 - Wireless segments close to the Modbus master
WIRELESS SEGMENTS CLOSE TO MULTIPLEXED MODBUS MASTERS
Multiplexing of 2 masters, one connected to the USB interface and another to the RS485. Wireless section located close to the
Modbus masters. It also allows the usage of a single master in any of the 2 interfaces (USB or RS485).
Fig. 7 - Wireless segments close to the multiplexed Modbus masters
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 7/22
LONG REACH APPLICATION
In seeking to expand the network, in order to obtain a greater distance, it is possible to assemble a tree shaped topology. As
exemplified in Fig. 6, to expand the network, an AirGate-Modbus configured as a RS485-SLAVES (Firmware > 1.23) was inserted
with the same PAN ID (5670). In another segment, two AirGates were assembled using the RS485 interfaces, an AirGate-Modbus
operating the RS485-SLAVES mode, and an AirGate-Modbus operating in RS485-MASTER mode. In this segment a new PAN ID
(5671) was created, starting a new star network.
Fig. 6 - Topology in tree style
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 8/22
RESTRICTION
In case there is the need to implement a tree-shaped network, a restriction must be observed. Due to issues imposed by Modbus
standard, Modbus slaves must not be connected between AirGate-Modbus as signed in Fig. 7.
Fig. 7 - Restriction
SETUP SOFTWARE
The DigiConfig application is a Windows® program used for the configuration of the AirGate-Modbus. For its installation, execute
the file “DigiConfigSetup.exe” from the CD. When installing the setup software, the USB Serial Port driver of AirGate-Modbus may
be automatically installed according to Fig. 10.
Fig. 8 - Selection of components
DigiConfig has a complete help file, with all necessary information for its full usage. To consult the help, start the application and
select the “Help” menu or press the “F1” key.
In case you don't have the CD which accompanies the AirGate-Modbus, consult the www.novusautomation.com website to get
DigiConfig installer and the additional manuals.
To configure a AirGate-Modbus you must execute the Digiconfig and in the main screen access “configurations/communication”
and edit the configurations, according to Fig. 11:
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 9/22
Fig. 9 - Communication of DigiConfig
•Serial Port = USB Serial Port (COM X)
•Baud rate = 115200
•Parity = None
•Stop Bits = 2 bits
•Timeout (msec) = 1000
CONFIGURATION MODES
AirGate-Modbus is configurable through DigiConfig software via USB interface, being necessary to put the device in “setup mode”.
To enter this mode, simply press the SETUP BUTTON, checking that the STATUS LED now flashes slowly (approximately once per
second). In “setup mode” the device stops behaving as a gateway from a Modbus network and starts to accept the configurations.
In the main screen of the DigiConfig software (Fig. 12) the following configuration must be seen:
•Initial Address = 246
AirGate-Modbus
INTAB INTERFACE-TEKNK AB 10/22
Fig. 10 - DigiConfig main screen
To edit the configurations of the AirGate-Modbus, after clicking the Search button, you must select it in the tree to the left of the
main screen.
To quit “setup mode“, you must press the SETUP BUTTON again, “Cancel”, or “Apply” a configuration. In this moment, the device is
reset and starts to operate according to the last applied configuration.
DETERMINATION AND SELECTION OF THE SERIAL PORT (COM) - WINDOWS
DETERMINATION
The serial port associated to the AirGate-Modbus is automatically determined by the operational system a few instants after the
connection of the AirGate-Modbus. The user may easily identify or alter the COM port associated to the AirGate-Modbus accessing
the Windows® “Device Manager”:
Control Panel / System/ Hardware / Device Manager / COM & LPT Ports
It’s also possible to open the “Device Manager” executing the following command: “devmgmt.msc”.
After opening the “Device Manager” it's possible to verify which is the Serial Port (COM) associated to the AirGate-Modbus. As it
can be seen in Fig. 13 the AirGate-Modbus is associated to COM7.
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