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M-system WL40EW2KR User Manual

920mhz band wireless device
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Modbus Transparent
920MHz Band Wireless Device
(Korea)
USERS MANUAL
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Tel: +81-6-6659-8201
Fax: +81-6-6659-8510
http://www.m-system.co.jp/
E-mail: info@m-system.co.jp

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  • Page 1 Modbus Transparent 920MHz Band Wireless Device (Korea) USERS MANUAL 5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN Tel: +81-6-6659-8201 Fax: +81-6-6659-8510 http://www.m-system.co.jp/ E-mail: info@m-system.co.jp...

  • Page 2: Table Of Contents

    C O NTENTS 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 ..............
  • Page 3 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 ..................
  • Page 4 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.

  • Page 5: Introduction

    INTRODUCTION M-System’s wireless devices configure 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.

  • Page 6: Specifications

    -90 dBm or less (PER = 10%) 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...

  • Page 7: Flow Until Start Of System Operation

    2. FLOW UNTIL START OF SYSTEM OPERATION Below is the flow until start of the system operation. Confirm each step in the flow and take necessary actions such as designing the network configuration, setting wireless devices, etc. 1) EXAMINING WIRELESS NETWORK CONFIGURATION 2) SELECTING DEVICES 3) PREPARING MAINTENANCE CONSOLE 4) PRELIMINARY MEASUREMENT OF RADIO WAVE ENVIRONMENT...

  • Page 8: Examining Wireless Network Configuration

    3. EXAMINING WIRELESS NETWORK CONFIGURATION 3.1 MULTIHOP NETWORK 3.1.1 NETWORK PARTICIPATION AND ROUTE CONFIGURATION A wireless multihop network can be configured with a parent device and multiple child devices. Each child device obtains authentication from the parent device to join the network after startup, and communicates using its IPv6 address. The IPv6 address is assigned automatically using the prefix set to the parent device and short addresses set individually to the par- ent device and each child device.

  • Page 9: Selecting Devices

    Select wireless devices and accessories necessary to configure 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] Specifications of parent device...
  • Page 10 ■ 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] Specifications of child device ITEM SPECIFICATIONS Power input 24V DC or 12V DC Current consumption 24V DC: ≤...

  • Page 11: Antenna

    4.2 ANTENNA ■ ANTENNAS FOR WL40KR SERIES Following two antennas are available for the wireless I/O WL40KR series. Select either antenna according to the usage scenes and their respective characteristics. WL40KR series do not use the diversity function. Figure 4.3 Sleeve antenna Figure 4.4 Rooftop antenna •...

  • Page 12: Preparing Maintenance Console

    To perform maintenance of wireless devices, please install the “MH920 Console International” (hereafter referred to as ‘maintenance console’) software in your PC. The maintenance console is downloadable at M-System’s web site (http:// www.m-system.co.jp/). Note: The maintenance console software of Oki Electric Industry Co., Ltd. is employed since the wireless devices incorporate the wireless communication modules manufactured by Oki.

  • Page 13: Installing Maintenance Console

    5.2.1 INSTALLING MAINTENANCE CONSOLE Install the maintenance console according to the following procedure. 1) Extract the downloaded files of the maintenance console. 2) Execute “mh920consoleInternational.msi” in the extracted files and start the setup wizard. When the “Setup Wizard” screen appears, click [Next]. Figure 5.1 Setup wizard Note: When “Microsoft .NET Framework 4”...
  • Page 14 4) When the “Destination Folder” dialog box appears, specify an installation folder and click [Next]. The default location of the installation folder is as follows depending on the operating systems of the PC. • For 32-bit OS C:\Program Files\OKI\MH920 Console International\ •...
  • Page 15 5) When the “Set Country” dialog box appears, select “Korea (KR),” and click [Next]. Figure 5.5 “Set Country” dialog box 6) When the “Ready to Install the Program” dialog box appears, select “Everyone,” and click [Install]. Figure 5.6 “Ready to Install the Program” dialog box Note: When “User Account Control”...
  • Page 16 7) After the “InstallShield Wizard Completed” message box appears, click [Finish] to finish the installation. Figure 5.7 “Installation Complete” message box P. 16 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1...

  • Page 17: Installing Usb Driver

    5.2.2 INSTALLING USB DRIVER A USB driver is required when connecting a wireless device to the PC. Install the USB driver according to the following procedure. 1) Connect the wireless device with the PC via a mini USB cable. 2) Turn on the power of the wireless device. 3) After a while, a message box appears on the PC stating that the driver of the wireless device cannot be found.
  • Page 18 • Windows 10 7) Right-click the start button and select “Control Panel” . 8) Select “Device Manager” from the list and expand “Ports (COM & LPT)” . 9) Right-click “USB Serial Device (COM x)” to display a menu and select “Update Driver Software” . Then proceed to step 11).
  • Page 19 10) When the “USB CDC Serial port Properties” dialog box appears, click [Update Driver] to activate the “Update Driver Software” wizard. Figure 5.10 USB CDC serial port properties 11) When the “Update Driver Software” dialog box appears, select “Browse my computer for driver software” . Figure 5.11 Search for driver software P.
  • Page 20 12) On the “Update Driver Software” dialog box, click [Browse], select the installation folder for the maintenance console, and click [Next]. The default location of the installation folder depends on the operating systems of the destination PC. • For 32-bit OS C:\Program Files\OKI\MH920 Console International\USB_Driver •...
  • Page 21 13) When a security warning appears, select “Install this driver software anyway” to continue the installation. Figure 5.14 Windows Security 14) “Installing driver” , then “Installation completed” messages appear in order. 15) Confirm that the driver has been successfully installed on the “Update Driver Software” dialog box, and click [Close]. Figure 5.15 “Update Driver Software”...

  • Page 22: Uninstalling Program

    16) Confirm that the port of “OKI USB CDC Serial port” is displayed in the “Ports (COM & LPT)” column on the Device Manager screen. Figure 5.16 Device Manager Note: Remember this COM port number to be used in COM port setting on the maintenance console. Figure 5.16 shows an example where the port of “OKI USB CDC Serial port”...

  • Page 23: Starting Maintenance Console

    5.3 STARTING MAINTENANCE CONSOLE Start the maintenance console according to the following procedure. 1) Double-click the shortcut “MH920 Console International” on the desktop to start the maintenance console. Figure 5.17 Shortcut of “MH920 Console International” 2) The following main screen appears. Figure 5.18 Maintenance Console Main Screen P.

  • Page 24: Environment Setup

    5.3.1 ENVIRONMENT SETUP This section explains items to be set from “Environment setup” on the main screen of the maintenance console. Before setting, make sure that the power of the wireless device is turned on and the device is correctly connected to the PC with the maintenance console via a mini USB cable.

  • Page 25: Password

    5.3.1.2 PASSWORD Set a password required for connecting to the wireless device. 1) Enter a password in the “New password” field and enter the same in the “New password (confirmation)” field. Refer to “7. EXAMINING PARAMETERS OF WIRELESS DEVICES” on page 53 for the details. Figure 5.21 Password setting 2) Click [Set] button.

  • Page 26: Omitting Password

    3) If “Omit password” is set to ‘No’ in “Environment setup” , the password is required to connect to a wireless device. Enter the password and click [Connect]. 4) When the following message appears, click [OK]. Figure 5.23 Password setting completion message 5.3.1.3 OMITTING PASSWORD Whether to omit password entry when connecting to a wireless device from the maintenance console can be set.
  • Page 27 2) Click [Set]. Figure 5.25 “Omit password” setting 3) A message box appears if the “Omit password” setting has been changed correctly. Click [OK]. P. 27 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1...

  • Page 28: Country Setting

    5.3.1.4 COUNTRY SETTING The country where the Maintenance Console is started and used is set. 1) Click the pull-down button in the “Country” column to show the country list. Figure 5.26 “Country” setting 2) Select [Korea (KR)] from the list, and click [Set]. Figure 5.27 “Country”...
  • Page 29 2) The country setting has been applied and setting completion messages appear. Click [OK] on each message. Figure 5.28 Country setting completion message Figure 5.29 Country setting completion message Figure 5.30 Country setting completion message P. 29 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1...

  • Page 30: Other Settings

    Not used. Figure 5.32 Maintenance Console Main screen 5.4.3 UPDATING FIRMWARE OF WIRELESS COMMUNICATION MODULE Do not update the firmware of a wireless communication module incorporated in a wireless device, or M-System will not warrant the device. P. 30 / 68...

  • Page 31: Preliminary Measurement Of Radio Wave Environment

    6. PRELIMINARY MEASUREMENT OF RADIO WAVE ENVIRONMENT In prior to building a wireless network, perform the following measurements to decide which channels to use and locations for install- ing respective wireless devices. • Channel noise scan • Communication test Execute a channel noise scan to measure RSSI values of respective channels. Check the channel numbers not used on the perimeter.

  • Page 32: Channel Noise Scan

    6.1 CHANNEL NOISE SCAN The maintenance console is equipped with the noise scan tool for measuring RSSI values of all the channels available or specific channels at regular time intervals. 6.1.1 STARTING CHANNEL NOISE SCAN 1) Connect a wireless device to the PC with the maintenance console via a mini USB cable, and turn on the power of the device. 2) Start the maintenance console and click [Environment setup] on the main screen to open the “Environment setup”...
  • Page 33 4) Close the “Environment setup” screen, and click [Measurement tool] on the main screen. Figure 6.3 Maintenance console main screen 5) When the following screen appears, check ‘Channel noise scan mode’ and click [Change mode]. Figure 6.4 Selecting channel noise scan P.
  • Page 34 6) When “Omit password” is set to ‘No’ on “Environment setup” screen, the password is required to connect with the wireless device. Enter the password and click [Connect]. Figure 6.5 Password entry 7) When the following message appears, click [OK]. Figure 6.6 Confirming channel noise scan startup 8) Turn off the power of the device and reboot it.
  • Page 35 10) “Channel Noise Scan” screen appears. Figure 6.8 Channel noise scan P. 35 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1...

  • Page 36: Executing Channel Noise Scan

    6.1.2 EXECUTING CHANNEL NOISE SCAN Perform the channel noise scan according to the following procedure. Do not turn off the power of the wireless device or remove the mini USB cable during the measurement, or an error message will appear and the channel noise scan tool will be forcibly terminated. 1) Click the pull-down button in the “COM port”...
  • Page 37 2) Specify ‘Scan interval’ and ‘Scan duration’'. When ‘Unlimited’ is checked, the measurement will infinitely continue. For example, set “Scan interval” to 500 µs and “Scan duration” to 100 msec., and 200 measurements will be carried out for 100 msec. at 500 µs interval per channel. [Number of times of channel noise scan per channel] = (scan duration [msec.] ×...
  • Page 38 4) Click [Save] button in the “Measurement result file” column to save measurement results in a specified folder with a specified file name. The default save location and file name are as follows unless they are specified. • Folder: ¥chnscan¥CH-Noise_Log¥ •...
  • Page 39 5) Click [Start] to start the measurement. Figure 6.13 Starting measurement 6) The measurement results are displayed as shown in the screen below. When determining which channels to use based on the results, choose ones whose RSSI values are lower than others and whose adjacent channels have low RSSI values.

  • Page 40: Communication Test

    6.2 COMMUNICATION TEST Perform the communication test between two wireless devices. Use a pair of a parent device and a child or two child devices, and set one device as a sender and the other as a receiver. Either device can be set to a sender or receiver. Set one device as a sender first and then the other one as a receiver. Take the following two steps to perform the communication test.
  • Page 41 5) Click the pull-down button in the “COM port” column, select the COM port to which the device is connected, and click [Set]. Figure 6.17 Environment setup 6) Close “Environment setup” screen, and click [Measurement tool] button on the main screen. Figure 6.18 Maintenance console main screen P.
  • Page 42 7) When the following screen appears, check ‘Communication test mode (Sender)’ and click [Change mode]. Figure 6.19 Selecting communication test (Sender) 8) When “Omit password” is set to ‘No’ on “Environment setup” screen, the password is required to connect to the wireless device. Enter the password and click [Connect].
  • Page 43 10) Turn off the power of the device and reboot it. 11) Check ‘Communication test mode (Sender)’ and click [Launch tool]. Figure 6.22 Starting communication test (Sender) 12) When the following screen appears, click the pull-down button in the “COM port” column, select the COM port to which the wire- less device to be set as a sender is connected, and click [Open].
  • Page 44 13) Specify the radio channel number. To use the channel already set in the device, click [Load from module]. To specify a new channel number, click the pull-down button in the “Radio channel number” column, select a channel, and click [Save to module].

  • Page 45: Setting Receiver

    6.2.2 SETTING RECEIVER Set the second wireless device as a receiver. Do not perform other operations than measurement of RSSI and PER after the receiver setting is complete. To perform other operations, terminate the measurement tool (refer to “6.3 TERMINATING MEASUREMENT TOOL” on page 51) and return to the normal mode.
  • Page 46 5) When “Omit password” is set to ‘No’ on “Environment setup” screen, the password is required to connect to the wireless device. Enter the password and click [Connect]. Figure 6.28 Password entry 6) When the following message appears, click [OK]. Figure 6.29 Confirming communication test (receiver) startup 7) Turn off the power of the device and reboot it.
  • Page 47 9) When the following screen appears, click the pull-down button in the “COM port” column, select the COM port to which the wire- less device to be set as a receiver is connected, and click [Open]. Figure 6.31 Selecting COM port 10) Specify a radio channel number.

  • Page 48: Measuring Rssi And Per

    6.2.3 MEASURING RSSI AND PER Execute the measurement with the wireless device set as a receiver. 1) Specify “Measurement duration” within the range of 1 to 600000 seconds on “Communication test (Receiver)” screen. Figure 6.33 Specifying measurement duration P. 48 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev.
  • Page 49 Click [Save] button in the “Measurement result file” column to save measurement results in a specified folder with a specified file name. The default save location and file name are as follows unless they are specified. • Folder: ¥PER_Log under the installation folder •...
  • Page 50 2) Click [Start] to start the measurement. When the measurement is complete, values are displayed in the respective columns of “Measurement result,” and the measure- ment result file is saved. Figure 6.35 Measurement result [Table 6.4] Measurement result contents ITEM EXPLANATIONS Maximum RSSI [dBm] Max.

  • Page 51: Terminating Measurement Tool

    6.3 TERMINATING MEASUREMENT TOOL Terminate the measurement tool (channel noise scan or communication test) according to the following procedure. 1) Click [Close] button in the “COM port” column on the channel noise scan or communication test (Sender or Receiver) screen and confirm that [x] button in the upper right corner is activated.
  • Page 52 3) Click [Change mode]. Figure 6.38 ‘Normal mode’ selected 4) When the following message appears, click [Yes]. Figure 6.39 Switching measurement mode 5) The wireless device reboots in the normal mode and the following message appears. Click [OK]. Figure 6.40 Successful mode switching message P.

  • Page 53: Examining Parameters Of Wireless Devices

    EXAMINING PARAMETERS OF WIRELESS DEVICES To configure a multihop network using wireless devices, decide each parameter as shown below. [Table 7.1] Parameters PARAMETER PARENT CHILD REMARKS Network join mode Identically set in both parent and child devices. ✓ ✓ PAN ID (group number) Identically set in both parent and child devices.

  • Page 54: Parameters

    PARAMETERS 7.1.1 NETWORK JOIN MODE The network join mode is selectable between ‘fast join mode’ and ‘v3-compatible mode’ for wireless devices in the network. ‘Fast join mode’ allows a faster connection to the network, in approximately 5 seconds at the fastest. Select ‘v3-compatible mode’...

  • Page 55: Network Name

    7.1.4 NETWORK NAME An identifier, called network name, can be given to a network so that child devices can connect to the correct parent device even when several parent devices are installed adjacently. Up to 16 English one-byte characters and some symbols (one-byte space, “-” , “_” , “ . ” and “@”) are usable. Register a network name to all the parent and child devices.

  • Page 56: Security Design

    7.1.7 SECURITY DESIGN Each child device needs to be authenticated by a parent device to join a wireless multihop network. There are two authentication methods as follows. • Encryption key authentication • MAC address authentication Refusal of specific child devices to join the network is possible by the following method. •...

  • Page 57: Ipv6 Prefix

    7.1.9 IPV6 PREFIX Child devices which are authenticated to join the multihop network obtain their IPv6 addresses and join the network. Set a network prefix (leading 64 bits of IPv6 address) to a parent device to configure the addresses. The IPv6 addresses for wireless devices are automatically set combining this prefix set to the parent device and short addresses set to individual parent and child devices.

  • Page 58: Station Number And Short Address

    7.1.10 STATION NUMBER AND SHORT ADDRESS To collect data from remote I/Os connected to wireless devices, it is necessary for a parent device to associate short addresses set to child devices with Modbus station numbers of the remote I/Os by either of following methods. •...

  • Page 59: Examining Packet Filtering Settings

    7.1.11 EXAMINING PACKET FILTERING SETTINGS Enable packet filtering to operate a system where an upper device polls transparent models and overlapped or delayed packets in the wireless network are discarded. [Table 7.14] Packet filtering settings ITEM PARENT CHILD EXPLANATIONS Packet filtering * Required Required Enable (Yes) or disable (None) the packet filtering function.

  • Page 60: Network Scale And Quality Settings

    7.1.13 NETWORK SCALE AND QUALITY SETTINGS The transmission frequency of control signals to maintain a wireless network is optimized according to the number of wireless de- vices connected to the network. Set the same device type and the number of devices to the wireless devices of the same PAN ID (group number). The default is child (fixed), 1 to 30 devices.

  • Page 61: Simple Calculation Of Sampling Cycle

    7.1.15 SIMPLE CALCULATION OF SAMPLING CYCLE This section describes how to calculate sampling cycle in using wireless devices. The values here are approximate, and may greatly vary depending on the radio wave environment. With the model configuration in Figure 7.2 as an example, the conditions and Equation to calculate the sampling cycle for a data acquisition device to collect data from sensors are shown below.

  • Page 62: Setting Wireless Devices

    Refer to the manual as shown in the table below for the configuration of the parent device. [Table 8.1] Configuration of parent device MODEL MANUAL WL40EW2KR WL40EW2x Operating Manual (EM-9115-B) 8.2 CHILD DEVICE Refer to the manual as shown in the table below for the configuration of the child devices.

  • Page 63: Installing Wireless Devices

    9. INSTALLING WIRELESS DEVICES Carefully read through the following notes before installing wireless devices. 9.1 RECOMMENDED INSTALLATION LOCATIONS In order to realize data communication in satisfactory radio wave conditions, wireless devices shall be installed under the following conditions. 1) Install devices as high as possible to avoid obstacles that interrupt radio wave. 2) When a metal plate is present behind a wireless device, the backward radio wave from the device may possibly become a noise reverberatively or hardly reach other devices installed behind.

  • Page 64: Directionality And Polirization Plane Of Antenna

    9.3 DIRECTIONALITY AND POLIRIZATION PLANE OF ANTENNA An antenna has a direction where it readily transmits or receives radio wave, which is called directionality. The directionality depends on antenna types. ■ SLEEVE ANTENNA FOR WIRELESS I/O WL40KR SERIES The following figures show the directionality of the sleeve antenna. The sleeve antenna is omnidirectional in a horizontal plane.
  • Page 65 ■ ROOFTOP ANTENNA FOR WIRELESS I/O WL40KR SERIES The following figures show directionality of the rooftop antenna. The Rooftop antenna is omnidirectional in a horizontal plane. Z-axis Y-axis XY plane X-axis XZ plane E_PLANE E_PLANE —— 863MHz —— 863MHz —— 890MHz ——...

  • Page 66: Fresnel Zone

    9.4 FRESNEL ZONE A constant space is necessary for optimum receiving sensitivity of radio wave. This space is called Fresnel zone. When the Fresnel zone is secured, the distance causes attenuation of radio wave (free space propagation loss). To secure the Fresnel zone, install antennas more highly than the Fresnel radius with no obstacles (actually at least 60% clear of obstacles) between them as shown in “Figure 9.4 Fresnel zone”...

  • Page 67: Interference To Radio Waves

    9.5 INTERFERENCE TO RADIO WAVES (1) NATURAL NOISES CAUSED BY LIGHTNING, STATIC ELECTRICITY, OR SOLAR RADIATION • Noise caused by lightning may affect radio communications. • Because of radio property, rain has little influence on radio communications. However, radio reachability can be affected when a water layer is formed by rainwater or snow accumulated on the metal plate surface to which the rooftop antenna is attached.

  • Page 68: Measurement Of Radio Wave Environment

    10. MEASUREMENT OF RADIO WAVE ENVIRONMENT Perform the measurements described in “6. PRELIMINARY MEASUREMENT OF RADIO WAVE ENVIRONMENT” again with the installed wireless devices. P. 68 / 68 920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1...

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