M-system WL40EW2KR User manual

Modbus Transparent
920MHz Band Wireless Device
(Korea)
USERS MANUAL
http://www.m-system.co.jp/
5-2-55, Minamitsumor
i, Nishinari-ku, Osaka 557-0063 JAPA
N
Te l: [phone] Fax: [phone]
E-mail: [e-mail]

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
CONTENTS
1. INTRODUCTION ............................................................................................................. 5
1.1 FEATURES............................................................................................................................................5
1.1.1 BASIC CONFIGURATION ........................................................................................................................... 5
1.1.2 CONFIGURATION INCLUDING LOW-SPEED MOVING DEVICES............................................................ 5
1.2 SPECIFICATIONS.................................................................................................................................6
1.3 PRODUCT LINEUP...............................................................................................................................6
2. FLOW UNTIL START OF SYSTEM OPERATION........................................................... 7
3. EXAMINING WIRELESS NETWORK CONFIGURATION .............................................. 8
3.1 MULTIHOP NETWORK.........................................................................................................................8
3.1.1 NETWORK PARTICIPATION AND ROUTE CONFIGURATION .................................................................. 8
3.2 CONFIRMING COMPONENTS IN INSTALLATION ENVIRONMENT...................................................8
3.3 CONFIRMING WIRELESS SECTIONS ................................................................................................8
4. SELECTING DEVICES ................................................................................................... 9
4.1 WIRELESS DEVICE .............................................................................................................................9
4.2 ANTENNA ........................................................................................................................................... 11
4.3 COAXIAL CABLE ................................................................................................................................ 11
5. PREPARING MAINTENANCE CONSOLE ................................................................... 12
5.1 DOWNLOADING MAINTENANCE CONSOLE ................................................................................... 12
5.1.1 APPLICABLE VERSION............................................................................................................................ 12
5.2 INSTALLING & UNINSTALLING MAINTENANCE CONSOLE AND USB DRIVER............................. 12
5.2.1 INSTALLING MAINTENANCE CONSOLE ................................................................................................ 13
5.2.2 INSTALLING USB DRIVER ....................................................................................................................... 17
5.2.3 UNINSTALLING PROGRAM ..................................................................................................................... 22
5.3 STARTING MAINTENANCE CONSOLE.............................................................................................23
5.3.1 ENVIRONMENT SETUP ........................................................................................................................... 24
5.3.1.1 COM PORT ....................................................................................................................................... 24
5.3.1.2 PASSWORD ...................................................................................................................................... 25
5.3.1.3 OMITTING PASSWORD.................................................................................................................... 26
5.3.1.4 COUNTRY SETTING ........................................................................................................................ 28
5.4 OTHER SETTINGS.............................................................................................................................30
5.4.1 COORDINATOR CONFIGURATION ......................................................................................................... 30
5.4.2 ROUTER CONFIGURATION..................................................................................................................... 30
5.4.3 UPDATING FIRMWARE OF WIRELESS COMMUNICATION MODULE................................................... 30
6. PRELIMINARY MEASUREMENT OF RADIO WAVE ENVIRONMENT........................ 31
6.1 CHANNEL NOISE SCAN ....................................................................................................................32
6.1.1 STARTING CHANNEL NOISE SCAN........................................................................................................ 32
6.1.2 EXECUTING CHANNEL NOISE SCAN .................................................................................................... 36
6.2 COMMUNICATION TEST....................................................................................................................40
6.2.1 SETTING SENDER ................................................................................................................................... 40
6.2.2 SETTING RECEIVER................................................................................................................................ 45
6.2.3 MEASURING RSSI AND PER................................................................................................................... 48
6.3 TERMINATING MEASUREMENT TOOL.............................................................................................51

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
7. EXAMINING PARAMETERS OF WIRELESS DEVICES .............................................. 53
7.1 PARAMETERS ....................................................................................................................................54
7.1.1 NETWORK JOIN MODE ........................................................................................................................... 54
7.1.2 PAN ID (GROUP NUMBER)...................................................................................................................... 54
7.1.3 RADIO CHANNEL NUMBER .................................................................................................................... 54
7.1.4 NETWORK NAME..................................................................................................................................... 55
7.1.5 TRANSMITTER POWER OUTPUT........................................................................................................... 55
7.1.6 RETRY TIMES BEFORE ROUTE SWITCHING ........................................................................................ 55
7.1.7 SECURITY DESIGN.................................................................................................................................. 56
7.1.8 LOW-SPEED MOVING MODE .................................................................................................................. 56
7.1.9 IPV6 PREFIX............................................................................................................................................. 57
7.1.10 STATION NUMBER AND SHORT ADDRESS ........................................................................................... 58
7.1.11 EXAMINING PACKET FILTERING SETTINGS ......................................................................................... 59
7.1.12 EXAMINING FIXED ROUTE SETTINGS .................................................................................................. 59
7.1.13 NETWORK SCALE AND QUALITY SETTINGS ........................................................................................ 60
7.1.14 PASSWORD TO CONNECT DEVICE ....................................................................................................... 60
7.1.15 SIMPLE CALCULATION OF SAMPLING CYCLE...................................................................................... 61
8. SETTING WIRELESS DEVICES................................................................................... 62
8.1 PARENT DEVICE................................................................................................................................62
8.2 CHILD DEVICE ...................................................................................................................................62
9. INSTALLING WIRELESS DEVICES............................................................................. 63
9.1 RECOMMENDED INSTALLATION LOCATIONS.................................................................................63
9.2 INSTALLING ANTENNAS ...................................................................................................................63
9.3 DIRECTIONALITY AND POLIRIZATION PLANE OF ANTENNA........................................................64
9.4 FRESNEL ZONE.................................................................................................................................66
9.5 INTERFERENCE TO RADIO WAVES.................................................................................................67
10.MEASUREMENT OF RADIO WAVE ENVIRONMENT ................................................. 68

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
■TRADEMARKS
• Microsoft®, Windows® and Internet Explorer® are registered trademarks or trademarks of Microsoft® Corporation in the United
States and other countries.
• Modbus Protocol is a communication protocol published by Modicon for use with the programmable logic controllers.
• Windows® 7, Windows® 8.1 and Windows® 10 are operating systems.
• Screen shots in this manual are used in accordance with Microsoft Corporation’s guidelines.
• Other company names and product names mentioned in this manual are trademarks or registered trademarks of each company.
The symbols such like ™, ® and © are not described in this manual.
■Notes
• M-System is not responsible for any effect caused by the results of using the products and this manual.
• M-System is not responsible for any effect caused by operations not described in this manual.
• The specications of the products and the descriptions in this manual are subject to change without notice.
• A “module” or “wireless module” displayed on the maintenance console indicates a “wireless device”.
• “Maintenance console” in this manual indicates “MH920 Console International” manufactured by Oki Electric Industry Co., Ltd.
• Do not disconnect the mini USB cable or turn off the power supply of a wireless device while connecting the maintenance console
and the device, or the settings in writing (updating or setting rmware) may be destroyed.

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
1. INTRODUCTION
M-System’s wireless devices congure a large-scale and highly reliable wireless multihop network system, which operates in the
920 MHz frequency band and complies with IEEE802.15.4g. The system can be used for various services such as BEMS, Smart
Metering, and M2M. There are two types of wireless devices: parent devices and wireless devices.
1.1 FEATURES
The wireless network system allows to collect data wirelessly from data acquisition devices and remote I/Os using Modbus protocol.
A wireless device (parent) communicates with the data acquisition device using Modbus/TCP protocol and with wireless devices
(child) using Modbus-RTU protocol. The parent device converts between Modbus-RTU and Modbus/TCP protocols.
1.1.1 BASIC CONFIGURATION
“Figure 1.1 System conguration example” shows a system where a PC side as Modbus/Master communicates with a child device
via a 920 MHz band wireless device using Modbus/TCP and RTU protocol, and also communicates with slave devices in multi drop
connection (RS-485).
LAN cable
(STP cable)
PC
Modbus /Master
Wireless gateway
(model: WL40EW2KR)
Wireless gateway
(model: WL40MW1KR)
Slave Device Slave Device Slave Device
MAX. 31
RS-485
Figure 1.1 System conguration example
1.1.2 CONFIGURATION INCLUDING LOW-SPEED MOVING DEVICES
A data acquisition device can collect data wirelessly from remote I/Os moving at low speed (4 km/h or less). The congura-
tion consists of a parent device, repeaters and child devices. Only the child devices move and do not function as repeaters.
In this conguration, it is possible to manage the devices moving at low speed within a specic range and collect data from them
through radio communication.
LAN cable
Wireless gateway
(model: WL40MW1KR)
PC
Modbus /Master
Wireless gateway
(model: WL40EW2KR)
Wireless gateway
(model: WL40MW1KR)
Wireless gateway
(model: WL40MW1KR)
Wireless gateway
(model: WL40MW1KR)
Wireless gateway
(model: WL40MW1KR)
Figure 1.2 System conguration example including low-speed moving device

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
1.2 SPECIFICATIONS
The table below shows the specications of the wireless network system.
[Table 1.1] Specications of wireless network system
ITEM SPECIFICATIONS
Wireless system
Baud rate Max. 100 kbps
Effective rate 10 kbps
Number of child devices Max. 100 per parent device
Number of hops Max. 16
Number of child nodes 25 or 15
The table below shows the specications of the wireless communication module of the wireless devices.
[Table 1.2] Specications of wireless communication module
ITEM SPECIFICATIONS
Wireless interface
Agency certication KCC
Frequency 920 MHz band (920.5 – 923.5 MHz)
Bandwidth 400 kHz
Max. transmission power 12.5 mW
Baud rate Max. 100 kbps
Max. packet size 2048 bytes
Max. transmission distance
Approx. 1 km (line of sight)
Note 1: The distance may vary depending on the installation environment.
Note 2: Use of a coaxial cable for antenna extension shortens the distance due
to cable loss.
Modulation GFSK
Receive sensitivity -90 dBm or less (PER = 10%)
1.3 PRODUCT LINEUP
■PARENT DEVICE
[Table 1.3] Parent device
MODEL FEATURES
WL40EW2KR Works as a gateway, converting between Modbus-RTU and Modbus/TCP (Ethernet) protocols.
Selectable between sleeve and rooftop antennas
■CHILD DEVICE
[Table 1.4] Child device
MODEL FEATURES
WL40MW1KR Wireless gateway
Selectable between sleeve and rooftop antennas

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
2. FLOW UNTIL START OF SYSTEM OPERATION
Below is the ow until start of the system operation.
Conrm each step in the ow and take necessary actions such as designing the network conguration, setting wireless devices, etc.
1) EXAMINING WIRELESS NETWORK CONFIGURATION
2) SELECTING DEVICES
3) PREPARING MAINTENANCE CONSOLE
4) PRELIMINARY MEASUREMENT OF RADIO WAVE ENVIRONMENT
5) EXAMINING PARAMETERS OF WIRELESS DEVICES
6) SETTING WIRELESS DEVICES
7) INSTALLING WIRELESS DEVICES
8) MEASUREMENT OF RADIO WAVE ENVIRONMENT

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
3. EXAMINING WIRELESS NETWORK CONFIGURATION
3.1 MULTIHOP NETWORK
3.1.1 NETWORK PARTICIPATION AND ROUTE CONFIGURATION
A wireless multihop network can be congured with a parent device and multiple child devices.
Eachchilddeviceobtainsauthentication fromtheparentdevicetojoin thenetworkafterstartup,andcommunicatesusingitsIPv6address.
The IPv6 address is assigned automatically using the prex set to the parent device and short addresses set individually to the par-
ent device and each child device.
■UPSREAM ROUTE
1) A child device collects information on the number of hops and the network quality (packet error rate) from adjacent parent and
child devices, and decides a preferential parent as a connection destination from a list of parent candidates selected from the
adjacent devices.
2) Based on the information, the upstream network route of the child device is generated.
■DOWNSTREAM ROUTE
1) The parent device registers the route transmitted from the child device in its route information table.
2) With this table, the parent device automatically generates the downstream network route (source routing) to the child device.
a
a
Generating upwstream route Generating downstream route
Parent device Parent device
Adjacent/
preferred
parent
Adjacent/
parent candidate
Adjacent/
parent candidate
(1) Collecting network quality
(2) Upstream route
Child device
(1)
(1)
(2)
(1)
Hop=0
Hop=1
Hop=1
Hop=2
Hop=2
Hop=3
Hop=0
Hop=1
Hop=1
Hop=2
Hop=2
Hop=3
Hop=3
Hop=3
Hop=2
e
g
h
i
f
d
b
c
Adjacent/
parent candidate
Adjacent/
parent candidate
Child device
(1) Transmitting route
(2) Downstream route
Hop=2
Adjacent/
preferred
parent
(1)
(2)
e
g
h
i
f
c
d
b
Figure 3.1 Wireless network
3.2 CONFIRMING COMPONENTS IN INSTALLATION ENVIRONMENT
Conrm the installation locations and the wiring destinations of a data acquisition device and remote I/Os in the installation environ-
ment of wireless devices.
3.3 CONFIRMING WIRELESS SECTIONS
Determine sections to be used for wireless communications in the installation environment.
Since a parent device is always connected to a data acquisition device, conrm also the connection of the parent device and remote
I/O child devices.

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
4. SELECTING DEVICES
Select wireless devices and accessories necessary to congure the network based on the following criteria.
4.1 WIRELESS DEVICE
■PARENT DEVICE: WL40EW2KR
The wireless I/O WL40KR series WL40EW2KR connects with an upper device (e.g. data acquisition device) via TCP/IP to collect
data from remote I/Os connected to wireless child devices.
Figure 4.1 Parent device
[Table 4.1] Specications of parent device
ITEM SPECIFICATIONS
Power input 24V DC or 12V DC
Current consumption 24V DC: ≤ 90mA
12V DC: ≤ 170mA
Operating temperature -20 to +60°C (-4 to +140°F)
Mounting DIN rail
Dimensions 105 mm × 60 mm × 107 mm (4.13 × 2.36 × 4.21 inch)
(excluding antenna and protrusions)

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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
■CHILD DEVICE: WL40MW1KR
The wireless I/O WL40KR series WL40MW1KR works as a gateway to output data received wirelessly to devices connected by wire.
Figure 4.2 Child device
[Table 4.2] Specications of child device
ITEM SPECIFICATIONS
Power input 24V DC or 12V DC
Current consumption 24V DC: ≤ 70mA
12V DC: ≤ 130mA
Operating temperature -20 to +60°C (-4 to +140°F)
Mounting DIN rail
Dimensions 105 mm × 60 mm × 107 mm (4.13 × 2.36 × 4.21 inch)
(excluding antenna and protrusions)