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AirGate-Modbus

NOVUS AUTOMATION 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 ........................................................................................................................................................... 9

CONFIGURATION MODES .............................................................................................................................................. 10

DETERMINATION AND SELECTION OF THE SERIAL PORT (COM) - WINDOWS ....................................................... 11

CONFIGURATIONS - AIRGATE-MODBUS ...................................................................................................................... 13

DATA COMMUNICATION - SERIAL ................................................................................................................................. 14

DATA COMMUNICATION – WIRELESS .......................................................................................................................... 14

MODBUS COMMANDS .................................................................................................................................................... 15

DESCRIPTION OF SOME REGISTERS ........................................................................................................................... 16

HOLDING REGISTERS TABLE ........................................................................................................................................ 18

SUPPORTED MODBUS REGISTERS.............................................................................................................................. 18

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.

Summary of content (22 pages)

PAGE 1
AirGate-Modbus AirGate-Modbus INSTRUCTIONS MANUAL V1.1x C INTRODUCTION ................................................................................................................................................................. 1 SPECIFICATIONS .............................................................................................................................................................. 2 CONNECTION AND INSTALLATION ........................................................................
PAGE 2
AirGate-Modbus 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.
PAGE 3
AirGate-Modbus 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.
PAGE 4
AirGate-Modbus 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.
PAGE 5
AirGate-Modbus 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.
PAGE 6
AirGate-Modbus 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.
PAGE 7
AirGate-Modbus 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. 8, 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 RS485MASTER mode.
PAGE 8
AirGate-Modbus 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. 9. Fig.
PAGE 9
AirGate-Modbus 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.
PAGE 10
AirGate-Modbus 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.
PAGE 11
AirGate-Modbus 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.
PAGE 12
AirGate-Modbus IMPORTANT RECOMMENDATION To improve the communication of the USB interface it is recommended the configuration of a Latency Timer. This parameter may be modified accessing “Advanced definitions for COMX” window according to Fig. 14. Later it's possible to verify, according to Fig. 15, the “Latency Timer (ms): which must be altered to 4. Fig.
PAGE 13
AirGate-Modbus CONFIGURATIONS - AIRGATE-MODBUS BASICS PAN ID Choose a common identifier for each wireless network. All of the AirGate-Modbus devices from a same network must be configured with the same PAN ID. MODBUS ADDRESS Each AirGate-Modbus must have a unique Modbus address. This address should be set before connecting the device to the network. Modbus communication frames addressed to AirGate-Modbus will be handled by itself. Frames with any other address will be forwarded.
PAGE 14
AirGate-Modbus DATA COMMUNICATION - SERIAL The AirGate-Modbus possesses two communication interfaces: • RS485, acting as communication interface with Modbus RTU protocol. • USB device, acting with the communication interface of Modbus RTU protocol. RS485 AND USB INTERFACE The RS485 and USB interfaces may be configured to operate in the following speeds (baud rates): 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200.
PAGE 15
AirGate-Modbus 35 RHT-Air up to the limit of 4 levels of depth, as illustrated in Fig. 16. This network topology is formed automatically at the moment the network begins. One only needs to configure at least one AirGate-Modbus as a Multi-Master operation mode, USB-Master or RS485-Master and the other equipment: (i) AirGate-Modbus, with the RS485-Slaves operation mode; and (ii) RHT-Air, all with the same PAN ID.
PAGE 16
AirGate-Modbus READ HOLDING REGISTERS – 0X03 This command can be used to read the value of one, or up to the maximum amount of consecutive holding registers, as shown in the “Holding Registers Table.” WRITE HOLDING REGISTERS – 0X06 This command can be used to write in a holding register, as shown in “Holding Registers Table.” DESCRIPTION OF SOME REGISTERS REGISTER 35 – OPERATION CHANNEL Shows the operation channel that the equipment is operating on the network.
PAGE 17
AirGate-Modbus LINK QUALITY INDICATOR To evaluate if the equipment was installed in an appropriate manner, it is recommended to verify the quality of the connection between each of the AirGate-Modbus and RHT-Air equipment units. This verification should be made by an analysis of registers 36 and 39, while the network is operating.
PAGE 18
AirGate-Modbus HOLDING REGISTERS TABLE SUPPORTED MODBUS REGISTERS ADDRESS DESCRIPTION MAXIMUM R/W 0 Used by the configuration software to place the equipment in firmware update mode. The equipment only accepts writing in this register if it is in configuration mode. If 1 is written on the register outside the configuration Software, the only was to return to the operation mode is turning off and turning back on the device.
PAGE 19
AirGate-Modbus 24 15th Byte of the SECURITY_KEY. When the cryptography is enabled, all of the devices of a single PAN ID should have the same value in this register. 0 255 R/W 25 16th Byte of the SECURITY_KEY. When the cryptography is enabled, all of the devices of a single PAN ID should have the same value in this register. 0 255 R/W Configures which Baud Rate will be used in the operation mode in the USB interface of the device.
PAGE 20
AirGate-Modbus 0 – 0 dBm, 1 – 2 dBm 2 – 4 dBm 3 – 6 dBm 4 – 8 dBm 5 – 10 dBm 6 – 12 dBm 7 – 14 dBm 8 – 20 dBm 34 Used to configure the transmission power of the Wireless interface. The larger the configured value, the greater the reach. 35 Indicates the operation channel which can vary from 11 to 25, According to Anatel guidelines, the device can operate in the frequencies of channels 11 to 25 for power levels of up to 20 dBm. 11 25 R 36 LQI RX Father Register Lists the LQI RX Father, i.e.
PAGE 21
AirGate-Modbus 49 Noise in channel 11 (frequency: 2405 MHz, band: 2 MHz) obtained when starting the network. The noise is measured with the power of the noise level of the channel measures in dBm, and can vary from -100 dBm (clean channel) to -15 dBm (dirty channel). -100 -15 R 50 Noise in channel 12 (frequency: 2410 MHz, band: 2 MHz) obtained when starting the network.
PAGE 22
AirGate-Modbus 67 Used so the user can identify the device. Each byte corresponds to an ASCII character. 0 65535 R/W 68 Used so the user can identify the device. Each byte corresponds to an ASCII character.