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User Manual 240U-E Industrial WiFi Wireless

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1. man_240E_v1 13 doc Chapter Three Operation 3 12 Wireless Message Filtering When configured as a Bridge the 240U E will transmit all broadcast messages appearing at its wired Ethernet port When the 240U E is configured as a Router this does not occur In many cases the intended recipient of the broadcast traffic does not lie at the opposite end of a proposed radio link Reducing unnecessary broadcast traffic sent over the radio link will increase available bandwidth for data The 240U E has a filtering feature to help reduce unnecessary wireless transmissions and enhance security The 240U E may be configured to reject or accept messages to and from certain Addresses To accept wireless messages from particular devices a Whitelist of Addresses must be made Alternatively to reject messages from particular devices a Blacklist of Addresses must be made Filtering applies only to messages appearing at the wired Ethernet port of the configured 240U E The Filter comprises of two lists one of MAC Addresses and another listing IP protocol details Each list may be set as either a blacklist to block traffic for listed devices and protocols or as a whitelist to allow traffic for listed devices and protocols The Filter operates on two rules listed below 1 A Blacklist has priority over a whitelist Traffic matching detail in a blacklist will be discarded if it also appears in a whitelist 2 When one or both l
2. remote devices This is the least efficient mode in terms of data transfer however may be suitable for point to point or small multipoint systems or in cases where the amount of data being transferred is small Settings The 240U E can route data between up to 10 separate groups of remote devices using any of the 3 modes described above for any group These Routing Servers can be configured on the Network Settings configuration web page The current module firmware can support a maximum of 50 remote devices connected to the 240U E in total If at least one master and one slave device are connected to a Routing Server in Master Slave mode or at least two devices are connected to a Routing Server in broadcast mode the Link LED will be illuminated otherwise the link LED will be off The link status for each Routing Server is also available in onboard Modbus status registers see Modbus I O Transfer section and comprehensive connection statistics are available online via the Statistics configuration web page TCP IP Configuration Keepidle This is the time in seconds before the first keep alive probe is sent on a given TCP IP connection if keep alive probes are enabled for that connection Keepintvl This sets the interval in seconds between keep alive probes on a given TCP IP connection If eight successive keep alive probes are sent with no response then the connection is dropped Routing Servers Config
3. Modes of operation As mentioned earlier there are 3 modes of operation that the 240U E can use to route data between the connected devices Protocol Aware Routing If the 240U E is aware of the protocol used by the remote devices then it can efficiently route data only to the required location based on the addressing inherent in that protocol The 240U E currently supports the Modbus RTU protocol When this mode is used the 240U E initially has to learn the location of slave devices by broadcasting requests to unknown slave devices However once the slave device responds its location is learnt and an entry is made in the internal routing table so that subsequent data directed at that slave device is sent only on the desired remote device connection Master Slave Routing If the protocol used by the remote devices is a Master Slave type protocol i e a single master device requests data transfers with slave devices but is a protocol other than Modbus RTU then data being sent by the master device is broadcast to all connected slave devices since the router can not know the required destination without knowledge of the protocol However data being sent by any slave device is always routed only to the master device Broadcast Mode If the protocol being used by the remote devices is not a master slave type protocol then data being sent by any remote device can be broadcast to all other connected Page 61 240U E Wireless Ethernet
4. Conditions of Acceptability 1 Equipment must be powered by a suitable certified Class II power supply 2 When being installed in a Class I Division 2 hazardous area the equipment must be installed in a suitable enclosure such that a tool is required to gain access to the connectors external to the certified equipment 3 Final acceptability of the equipment is subject to the authority having local jurisdiction man_240E_v1 13 doc Chapter One Introduction CONTENTS CHAPTER ONE INTRODUCTION siii ip cereales 7 1 1 NETWORK TOPOLOGY an E ia 7 1 2 GETING STARTED OQUICREY A E E seams A 10 CHAPTER TWO INSTALLATION cccisisceccescessecatavesecosscenscagavescssedesencusavece sonneepeeucioencees 11 2 1 GENERAL ri A 11 2 2 ANTENNA INSTALLATION iii li lts Ena 11 2 2 1 Dipole and Collinear antennas constata oil diarias 13 2 2 2 Direc n l antennas rn ES AA AA AA A A 14 2 3 POWER SUPPLY ici di td 15 2 4 SERIAL CONNECTIONS henner naa a a aia a aati 15 2 4 1 RSZ32 Serial PO Ae ks ee e e O AN RO eae 15 2 4 2 RS485 Serial Portas danna nidad ii 16 2 5 DISCRETE DIGITAL INPUN OUTPUT a 18 CHAPTER THREE OPERATION iia 19 3 1 START UP iia aad 19 3 2 SELECTING A CANNES intro did Da do 21 3 3 DEFAULT CONFIGURATION 7 E A A i Sn 22 3 4 CONFIGURING THE UNIT FOR THE FIRST TIME ccccsssssececsesececessseceesssneeeeeesesseeeenees 22 3 4 1 Set PC to same network as 240U E onooocccononococonoconnconnnnnnnnnonanonononnonnnnccnnnn
5. Chapter Three Operation a WDS Configuration Microsoft Internet Explorer File Edit View Favorites Tools Help Q O x E PN JO search S 7 Favorites ela w JE 3 Address http 192 168 5 3 webjwds24 asp Ec Links gt Wireless Mode Layer 3 bridge 3 address mode WDS IEEE802 11 4 address mode Bridge Spanning Tree Protocol F Bridge Priority 32768 AP to AP Connections Inherit default encryption E Auto connect to WDS enabled APs O Only connect to APs in list below ol Maximum WDS connections to this device 37 Allow WDS Connections with the following Access Points Add Entry Delete Entry MAC Address Encryption Passphrase Router IP Router Subnet None y 169 254 0 3 255 255 255 0 None 169 254 5 3 255 255 255 0 i lo N a eel y A consequence of using a different network address for the WDS link between unit A and B is that we now need to configure a routing rule at units A and B so that the 240U E can determine where to send traffic destined for the respective network addresses of A and B For example if unit B receives traffic destined for network 192 168 0 x i e somewhere on unit A s network the routing rule specifies that the traffic must be forwarded to the end point of the WDS link to unit A The routing rules for unit B are shown below for more information on routing rules refer to the section 3 11 Routing Rul
6. There are some standard spanning tree protocol timers that can be adjusted that may help with managing spanning tree Protocol See section 3 10 Multiple AP Repeater Mesh Network WDS Configuration below for details There is some overhead in maintaining a network utilizing the Spanning Tree Algorithm Users wishing to increase their throughput at the expense of redundancy should disable Spanning Tree The Spanning Tree Protocol can be configured on the Repeaters configuration page note that 4 address mode must be enabled if the bridge Spanning Tree Protocol is to be used refer section 3 7 Normal Operation for details Page 33 240U E Wireless Ethernet 3 10 Multiple AP Repeater Mesh Network Access Point__ Re Access p El NWDS Links Point Access AA gt O E ee Point 7 rl FA T a Pis Access Client soe lol gt Client Bridge 5 Bridge 7 gni a g The range of a wireless network can be extended by allowing Access Points to behave as repeaters and forward traffic to other Access Points Access Point to Access Point communications is also known as Wireless Distribution System WDS The 240U E offers very powerful WDS configuration allowing for a mesh network with self healing and automatic node discovery Alternatively fixed AP to AP links can be configured for optimized throughput WDS Access Points require IEEE802 11 4 address mode 4 address mode may also be used by 240U E clients when
7. User Manual 240U E Industrial WiFi Wireless Ethernet amp Device Server ELPRO Technologies Pty Ltd 9 12 Billabong Street Stafford O 4053 Australia Tel 61 7 33528600 Fax 61 7 33528677 Email sales O elprotech com Web www elprotech com ELPRO 24 hour Support Help line America 866 7134409 Rest of the world 617 3352 8624 240U E Wireless Ethernet Thank you for your selection of the 240U E Wireless Ethernet Modem We trust it will give you many years of valuable service ATTENTION Incorrect termination of supply wires may cause internal damage and will void warranty To ensure your 240U E enjoys a long life double check ALL your connections with the user s manual before turning the power on Caution For continued protection against risk of fire replace the internal module fuse only with the same type and rating CAUTION Antennas used with this device must be installed to provide a separation distance of at least 20 cm from all persons to satisfy RF exposure compliance DO NOT operate the transmitter when someone is within 20 cm of the antenna operate the transmitter unless all RF connectors are secure and any open connectors are properly terminated operate the equipment near electrical blasting caps or in an explosive atmosphere All equipment must be properly grounded for safe operations All equipment should be serviced only by a qualified technician man_240E_v1 13 doc
8. d Power up 240U E Basic network settings will be displayed on the terminal as illustrated below When prompted hit enter key to stop automatic boot process You have 3 seconds to abort the boot process Page 25 240U E Wireless Ethernet My Right Boot 2 1 Copyright 1999 2004 Cybertec Pty Ltd All rights reserved Product Variant Serial No Release Released date Build date Build host This software is provided by Cybertec http www cybertec com au 256KB Oxffe00000 8192KB 0x00000000 Configuration table address pattern check address bus check ED Released host Tue Mar Anxosity as is and with NO WARRANTY 143KB 0x00023d8c PASSED PASSED E24g E2400 100 07050012 03061081212 epm mrb elpro E24g 1 63 March 2006 Anxosity 7 08 50 31 2006 Boot Flags no RAM test no ROM test bus timer on wdog on static IP auto boot net boot reset on local file no binary load Boot delay sO Boot Filename memory 0xffe40000 0x80000 Boot Address 192 168 0 112 Boot Netmask 255 255 255 0 Boot Gateway 192 168 0 1 Boot Host 92 168 0 220 Boot Mac 0 00 12 af 00 03 05 Boot Mac 1 00 12 af 00 03 05 RTE data store Setting bus timer no error on and watchdog on PASSED 802 11 Interface Power ON Reset 802 11 Interface Checking 802 11 NIC Base Address Register Read Write Test OK Initialising Successful Getting Serial Number Reading B
9. 255 255 255 255 255 in milli seconds Average Bms Approximate round trip times Minimum Bms Maximum 5ms Contro1 C AC Cz gt This t command is used to repeatedly ping the specified node in the network to cancel use Ctrl C A good test for the network once it is first set up is to use PING repeatedly from one PC s IP address to the other PC s IP address This gives a good example of the networks reliability and how responsive it is from point to point When you enter Ctrl C the program reports a packet sent received lost percentage man_240E_v1 13 doc Chapter Four Diagnostics from 192 168 123 from 192 168 123 from 192 168 123 from 192 168 123 from 192 168 123 from 192 168 123 from 192 168 123 2 bytes 32 time 54ms TTL 128 2 bytes 32 time 66ms TTL 128 2 bytes 32 time 54ms TTL 128 2 bytes 32 time 922ms TTL 128 2 bytes 32 time 242ms TTL 128 2 bytes 32 time 384ms TTL 128 2 hbytes 32 time 54ms TTL 128 from 192 168 123 2 bytes 32 time 53ms TTL 128 from 192 168 123 2 bytes 32 time 54ms TTL 128 from 192 168 123 2 bytes 32 time 8ims TTL 128 2 e or e 2 2 2 2 ae from 192 168 123 bytes 32 time 54ms TTL 128 from 192 168 123 bytes 32 time 55ms TTL 128 from 192 168 123 bytes 32 time 355ms TTL 128 from 192 168 123 bytes 32 time 54ms TTL 128 from 192 168 123 bytes 32 time 1ms TTL 128 from 192 168 123 bytes 32 time 54ms TTL 128 from 192 168 12
10. you can view or change the configuration of a remote module via the wireless link provided the remote module is already linked to the local 240U E To perform remote configuration connect a PC to the local module run Internet Explorer and enter the IP address of the remote unit the configuration page of the remote module will be shown and changes can be made If the remote module is configured as a Router enter the wireless IP address of the router not the Ethernet address Care must be taken if modifying the configuration of a module remotely If the Radio Configuration is changed some changes made may cause loss of the radio link and therefore the network connection It is advisable to determine path of the links to the modules you wish to modify and draw a tree diagram if necessary Modify the modules at the leaves of your tree diagram These will be the furthest away from your connection point in terms of the number of radio or Ethernet links In a simple system this usually means modifying the Client modules first and the Access Point last Page 65 240U E Wireless Ethernet 3 19 Configuration Examples Setting a 240U E to Factory Default Settings Access configuration web pages of 240U E Refer section Accessing Configuration inside a module for the first time or Modifying an existing configuration 1 Click on System Tools Menu Item 2 Enter username user and password user when prompted fo
11. 128 Client units linked to any one Access Point Page 9 240U E Wireless Ethernet 192 168 0 34 192 168 0 72 a No es 7 Es gt San 192 168 0 34 N a aN ge Led 192 168 0 72 LAN A E sa Access Point N Saua Bridge EA 192 168 0 73 192 168 0 74 q Ld 169 254 102 17 l en an c 169 254 109 40 ie oe ds LAN B Client Router 1 2 Getting Started Quickly Most applications for the 240U E require little configuration The 240U E has many sophisticated features however if you don t require these features this section will allow you to configure the units quickly First read Section 2 Installation The 240U E requires an antenna and a power supply Q Power the 240U E and make an Ethernet connection to your PC for further information on how to do this refer to section 3 4 o Set the 240U E address settings as per section 3 4 a Save the configuration the 240U E is now ready to use Before installing the 240U E bench test the system It is a lot easier to locate problems when the equipment is all together There are other configuration settings which may or may not improve the operation of the system For details on these settings refer to section 3 man_240E_v1 13 doc Chapter Two Installation Chapter Two INSTALLATION 2 1 General The 240U E module is housed in a rugged aluminium case suitable for DIN rail mounting Terminals will accept wires up to 2 5 sqmm 12 gauge in siz
12. 168 5 3 192 168 5 5 _WDS Bridae__ Access Point 192 168 0 2 gt dl 5 E RE 2 Pe A Rg l lige 2 Aiea Migs Access Point 192 168 6 4 As mentioned previously configuration of the WDS router example is more complex than the bridged example given earlier In this case all Access Points have different SSID s and none of Page 37 240U E Wireless Ethernet them have SSID broadcast disabled so that WDS configurations can be made without knowledge of Access Point MAC addresses If SSID broadcasts were disabled each configuration entry would require an SSID and a MAC address this is because both SSID and MAC addresses are required to establish a link but the MAC address is always broadcast in beacons whereas the SSID broadcast is configurable Unit B in the WDS router example above has three WDS links to units A C and D we show unit B s configuration below It can be seen that there are 3 entries in the WDS Connections list The first entry specifies a connection to the Access Point whose SSID is A and that it is to be a WDS router interface with Router IP address 169 254 0 3 this is the address that unit B adopts for the router interface link to unit A Note that this IP Address specifies a different network than that of the default interface for unit B i e default interface network 192 168 0 x compared to WDS interface network 169 254 0 x It is a requirement that the interfaces at each en
13. AES secret phrase Page 35 240U E Wireless Ethernet The WDS configuration for unit B is shown above this page is accessible via the Repeaters link from the configuration web pages WDS mode has been enabled and Only connect to APs in list has been selected so that the repeater path is fixed Since this example is a bridged network i e all devices on the same IP network and there is no possibility of loops i e multiple paths to the same location we do not need to incur the overhead of enabling bridge spanning tree protocol It can be seen that there are 2 entries in the WDS connections list for unit B We specify the Access Points at the other end of the WDS links by SSID only though MAC addresses could also have been specified if there are multiple Access Points with the same SSID Finally in this example we demonstrate the flexibility of the 240U E by specifying different Encryption on only one of the WDS links In the example below 4 Access Points A B C and D form a mesh network using only WDS bridge interfaces Each of the Access Points may also have its own clients associated Each Access Point also has the same SSID meaning the clients can roam freely throughout the mesh network and also that WPA encryption may easily be used A B C and D can all exchange data with each other as can all of their clients as if they were all on the same wired segment It can bee seen that there are redu
14. Allowed values are 0 to 255 Enable Modbus TCP Client Master Check this box to enable the onboard Modbus TCP Client I O to be transferred via the Modbus TCP client is specified with Modbus TCP Client Mappings Modbus Client Scan Rate Enter the delay in milliseconds between execution of consecutive Modbus TCP Client Mappings to the same Server Reset Registers on Comm s Fail When Enabled the value in any onboard I O register will be reset to zero if a valid Modbus transaction directed to from the given register has not been completed for longer than the Comms Fail Timeout Comms Fail Timeout The period of time after which onboard I O registers will be reset if a valid Modbus transaction directed at that register has not completed Modbus TCP Client Mappings Page 59 240U E Wireless Ethernet Local Register Enter the starting onboard I O register number that the specified Modbus Master transaction will transfer I O to from VO Count Specify the number of consecutive I O register to be transferred for the specified transaction Function Code Specify the Modbus Function Code for the transaction Destination Register Enter the starting I O register number in the destination device that the specified Modbus Master transaction will transfer I O to from Device ID Enter the Modbus Device ID of the destination Modbus device Server IP Address Specify the IP Addres
15. Apply Changes Update settings Apply Changes and Save Update settings and save to non volatile memory NOTE When configuring a TCP filter it is often desirable to also configure both an ARP and an ICMP filter for the same IP Address range The ARP filter is required whenever the sending device does not have a fixed IP to MAC Address translation table entry i e whenever the device may need to send an ARP request to determine the MAC address of a device with a known IP Address An ICMP filter is needed to allow disallow pings 3 13 Serial Port Configuration The 240U E has an RS 232 and RS 485 port for serial communications These ports may be used for different purposes The 240U E offers three different serial functions which are PPP server Serial Gateway and Modbus TCP to RTU Gateway 3 13 1 RS 232 PPP Server The 240U E can be used as a PPP Server to connect the wireless Ethernet system to serial devices via the RS232 or RS485 serial ports PPP Server enables a network connection to the 240U E over a serial cable This is much like dial up internet The maximum serial data rate is 115 200bps Hardware or Software flow control may be selected With minimal configuration on the PC you may use Dial up networking in Windows XP to connect to the network via the serial port For the 240U E users must configure the local IP address for the 240U E and the remote device IP address Some care must be taken
16. Beacon messages This is particularly useful in unencrypted radio networks Disallow Probe Requests without correct SSID This should be used to prevent unwanted users from detecting the radio network System Address SSID actively by sending a probe request to the Access Point When Disallowed if the correct System Address is not supplied in the probe request the Access Point will not respond This is particularly useful in unencrypted radio networks Save Changes Save changes to non volatile memory Changes will not take effect until module is reset Save Changes and Reset Save changes to non volatile memory and reset module man_240E_v1 13 doc Chapter Three Operation 3 9 Spaming Tree Algorithm Redundancy The bridge Spanning Tree Protocol function was introduced to handle network loops and provide redundant paths in networks To enable the STP requires that WDS mode also be enabled on the Repeaters configuration page When enabling WDS mode on a client station you should ensure that WDS mode is also enabled at the corresponding Access Point refer section 3 10 for more information For example consider this network with a redundant wireless link If the bridge Spanning Tree Protocol is enabled one of the two wireless links will be disabled that is all wireless data will be transferred by one link only If the active link fails the other link will automatically start trans
17. Explorer and ensure that settings will allow you to connect to the IP address selected If the PC uses a proxy server ensure that Internet Explorer will bypass the Proxy Server for local addresses This option may be modified by opening Tools gt Internet Options gt Connections Tab gt LAN Settings gt Proxy Server gt bypass proxy for local addresses l Enter the webpage http xxx xxx xxx xxx where xxx xxx xxx xxx is the IP address selected for the module A welcome webpage should be displayed as illustrated m Clicking on any of the menu items and entering the username user and password user may open Configuration and Diagnostics If the password has previously been configured other than the default password then enter this instead 3 5 Network Configuration You can view or modify Ethernet network parameters by selecting the Network menu When prompted for username and password enter user as the username and user as the password in the password field If IP address or password has been forgotten the Factory Default switch may be used to access the existing configuration Refer to section 3 3 above The Network Configuration page allows configuration of parameters related to the wired and wireless Ethernet interfaces In general IP address selection will be dependant upon the connected wired Ethernet device s before connecting to an existing LAN consult the network administrator A system o
18. IP Address 192 168 0 200 is the IP address of unit C which is the Modbus TCP Server we are reading from Page 57 240U E Wireless Ethernet Response Timeout 1000 ms specifies that unit C must respond to this message within 1000ms Comm Fail Register 0 specifies the local register where the communications status for this mapping will be stored 3 Digital Input Output Configuration Microsoft Internet Explorer File Edit View Favorites Tools Help Q se 7 x a PN PO search S 2 Favorites E 3 jw LJ a bp 3 Address fa http 192 168 0 196 web digio asp Go Links bt Modbus TCP Configuration Enable Modbus TCP Server Slave 7 Modbus Server Device Id fi Enable Modbus TCP Client Master IV Modbus Client Scan Rate msec 500 Reset Registers on Comms Fail v Comms Fail Timeout sec 60 Modbus TCP Client Mappings Add Entry Delete Entry Local IO Function Code Destination Device Server IP Response Comm Register Count Register Id Address Timeout Fail ms Register 4320 2 Read Discretes 4300 192 168 0 200 1000 n4 Read Inputs 1 192 168 0 200 1000 16 Write Registers 1 192 168 0 196 1000 The second mapping reads 8 registers from serial unit D into onboard registers in unit B Note that in this case the specified Device ID 6 is the Modbus Address of the serial device D while the Server IP Address 192 168 0 200 is the IP Addr
19. address and subnet mask may also be accessed via the RS 232 serial port Accessing Configuration for the first time There are two methods for accessing the configuration inside a 240U E The first method requires changing your computer settings so that the configuring PC is on the same network as the 240U E with factory default settings This is the preferred method and is much less complicated than the second method You will need a straight through Ethernet cable between the PC Ethernet port and the 240U E The factory default Ethernet address for the 240U E is 192 168 0 1XX where XX are the last two digits of the serial number check the label on the back of the module The second method requires setting an IP address in the 240U E such that it is accessible on your network without having to change your network settings 3 4 1 Set PC to same network as 240U E Connect the Ethernet cable between unit and the PC configuring the module e Set the Factory Default Switch to the SETUP position This will always start the 240U E with Ethernet IP address 192 168 0 1XX subnet mask 255 255 255 0 gateway IP 192 168 0 1 and the radio disabled Do not forget to set the switch back to the RUN position and cycle power at the conclusion of configuration for resumption of normal operation man_240E_v1 13 doc Chapter Three e Power up the 240U E module e Open Network Settings on your PC under Control Panel The following description
20. and 240U E e Ensure configuration PC and 240U E are setup to communicate on the same network e Set dipswitch to SETUP e Power up unit and wait for LINK led to cease flashing e Adjust PC network settings Page 67 240U E Wireless Ethernet Set Configuration PC network card with network setting of IP address 192 168 0 1 netmask 255 255 255 0 e Open configuration webpage with Internet Explorer at address http 192 168 0 1XX When prompted for password enter default username user and password user Enter Network and select Operating Mode as Access Point Device Mode should be set to Router Set the Gateway IP address to 192 168 0 1 Set the Ethernet IP address to 192 168 0 200 network mask 255 255 255 0 Set the Wireless IP address to 169 254 102 54 network mask 255 255 255 0 Select the Radio Encryption required and enter encryption keys if necessary Set dipswitch to RUN Click on button Save to Flash and Reset Webpage will display that message indicating details are being written to flash Wait for 240U E to reboot before removing power Enter a System Generator String Client Configuration Perform the same configuration steps as the Access Point configuration with the following differences Enter Network and select Operating Mode as Client Device Mode should be set to Bridge Set the Gateway IP address to 169 254 102 54 Set the Ethernet IP address to 169 254 102 53 network mask 255 255 2
21. and final entry in the example above configures a Routing Server to operate in broadcast mode Only a Slave Port is configured in this case and this is the TCP Port number of the 240U E that all remote devices must connect to Data arriving from any remote device will then be broadcast to all other devices that are connected to this port man 240E vl 13 doc Chapter Three Operation Module Information Configuration Module Information Webpage Fields This configuration page is primarily for information purposes With the exception of the password the information entered here is displayed on the root webpage of the 240U E Password When changing the password on this screen it will be sent unencrypted over any wired network If encryption is enabled on the 240U E any radio communications are encrypted and therefore hidden from radio eavesdroppers Caution must only be taken 1f there are potential eavesdroppers on the wired network Configuration password Device Name A text field 1f you wish to label the particular 240U E Owner A text field for owner name Contact A text field for owner phone number email address etc Description A text field used for a description of the purpose of the unit Location A text field used to describe the location of the 240U E 3 18 Remote Configuration Because a module configuration is viewed and changed in a web format which is an Ethernet application
22. as a master unit and will control the flow of data to the Clients linked to it Clients can only transmit data to the AP to which they are connected When a Client transfers data to another Client it first transmits the data to the AP which then forwards the data to the destined Client Presence of a link does not mean that the connected unit is authorized to communicate over radio If the encryption keys are incorrect between units in the same system or a dissimilar encryption scheme is configured the LINK led will light however data may not be passed over the wireless network A maximum of 255 Clients may be linked to an Access Point How a Link connection is lost The Access Point refreshes the link status with a Client every time a message is received from that Client If nothing is received from a Client for a period of 120 seconds the Access Point sends a link check message If there is no response to the link check a De authenticate message is sent and the link is dropped Page 19 240U E Wireless Ethernet A Client monitors beacons from an Access Point to determine whether the link is still present If the Client can no longer receive beacons from the AP the AP is considered to be out of range and the link is dropped Whenever a Client is not connected to an AP it will cyclically scan all available channels for a suitable AP Roaming Clients may also roam between Access Points If a Client receives a beacon f
23. creating New Connection Wizard Select a Device This is the device that will be used to make the connection 6 Set Computer Name Select a device Communica 7 Select a COM port New Connection Wizard Connection Availability You can make the new connection available to any user or only to yourself connection that is created for your use only is saved in your user account and is not available unless you are logged on Create this connection for 8 Select availability a as ee Completing the New Connection Wizard You have successfully completed the steps needed to create the following connection Ethernet Modem Share with all users of this computer 9 Click Finish The connection will be saved in the Network Connections folder To create the connection and close this wizard click Finish lt Back Cancel man_240E_v1 13 doc Chapter Three Operation 2 xl 10 Select properties of this new connection by right General Options Security Networking Advanced clicking on connection Ames aten 11 General Tab click on Configure button Communic a M Configure AAA 12 Ensure maximum speed is 115200bps click OK B Communications cable between two computers COM1 Mesones z 2x Modem protocol z General Options Security Networking Advanced Hardware features Type of dial up server am calling IV Enable hardware flow control Enable mod
24. e On the General tab enter IP address 192 168 0 1 Subnet mask 255 255 255 0 and default gateway 192 168 0 1 Internet Protocol TCP IP Properties General You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Obtain an IP address automatically Use the following IP address IP address 192 168 0 1 Subnet mask 255 255 255 Default gateway 192 168 0 1 Use the following DNS server addresses Preferred DNS server i Alternate DNS server e Open Internet Explorer and ensure that settings will allow you to connect to the IP address selected If the PC uses a proxy server ensure that Internet Explorer will bypass the Proxy Server for local addresses This option may be modified by opening Tools gt Internet Options gt Connections Tab gt LAN Settings gt Proxy Server gt bypass proxy for local addresses e Enter the default IP address for the 240U E http 192 168 0 1XX where XX is the last two digits of the serial number e A welcome webpage should be displayed as illustrated below e Configuration and Diagnostics may be opened by clicking on any of the menu items and entering the username user and default password user Configure the unit to your requirements refer later sections of this manual When Configuration is complete switch Fac
25. encryption After changes are made to Network Configuration it is important to save the configuration by selecting Save and Reset Page 27 240U E Wireless Ethernet Network Settings Webpage Fields Operating Mode Used to select Access Point Infrastructure Client Infrastructure IBSS Ad Hoc or MONITOR mode By default this is set to Client Device Mode Used to select Bridge or Router mode By default this is set to Bridge FTP Enabled This enables access to volatile memory storage on the 240U E By default this is disabled MAC Address This is the unique hardware address of the 240U E assigned in the Factory For the majority of systems this item should not be changed If the device is to be connected to equipment that will only communicate with a set MAC Address the 240U E may clone that MAC address Gateway IP Address This is only required if the wired LAN has a Gateway unit which connects to devices beyond the LAN for example Internet access If there is no Gateway on the LAN set to the same address as the Access Point that is the Ethernet IP Address below Ethernet IP Address The IP address of the 240U E on its wired Ethernet port This should be set to the IP address you require Ethernet IP Subnet Mask The IP network mask of the 240U E on its Ethernet port This should be set to the IP address you require Wireless IP Address The IP addr
26. from from from from from from from from Reply Reply Reply Reply Reply Reply Reply Reply 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 bytes 32 bytes 32 bytes 32 bytes 32 192 168 123 123 4 Received 4 Approximate round trip times Minimum dms bytes 32 bytes 32 hytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 bytes 32 hytes 32 Ping statistics for 192 168 123 123 Packets Sent 19 Received 19 t ime 4ms time lt ims time lt ims time lt ims Lost time 3ms time lt ims time lt ims time ims time lt ims time lt ims time lt ims time lt ims time ES time lt ims time lt ims time lt ims time 5ms time lt ims time lt ims time lt ims time lt ims time lt ims time lt ims in milli seconds Average Lost TTL TTL TTL TTL COz ims TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL TTL 8 Az loss 255 255 255 255 loss gt 255 255 255 255 255 255 255 255 255 255 255 255 255 255
27. further information on regulations 2 Operation is authorized by the radio frequency regulatory authority in your country on a non protection basis Although all care is taken in the design of these units there is no responsibility taken for sources of external interference Systems should be designed to be tolerant of these operational delays 3 To avoid the risk of electrocution the aerial aerial cable serial cables and all terminals of the 240U E module should be electrically protected To provide maximum surge and lightning protection the module should be connected to a suitable earth and the aerial aerial cable serial cables and the module should be installed as recommended in the Installation Guide 4 To avoid accidents during maintenance or adjustment of remotely controlled equipment all equipment should be first disconnected from the 240U E module during these adjustments Equipment should carry clear markings to indicate remote or automatic operation E g This equipment is remotely controlled and may start without warning Isolate at the switchboard before attempting adjustments 5 The 240U E module is not suitable for use in explosive environments without additional protection Page 3 240U E Wireless Ethernet Limited Lifetime Warranty Disclaimer and Limitation of Remedies ELPRO products are warranted to be free from manufacturing defects for the serviceable lifetime of the product The serviceable
28. mounted on moving equipment or if there is moving equipment in the area then the solution is to use two antennas Because the two connectors are separated the RF signal at each connector will be different in the presence of multi path fading The 240U E unit will automatically select the higher RF signal Note that directional antennas are not normally used in plant and factory installations Line of sight installations In longer line of sight installations the range may be increased by using a high gain antenna on the TX RX connector However the gain should not cause the effective radiated power ERP to exceed the permitted value A second higher gain antenna can be connected to the RX connector without affecting ERP this will increase the operating range provided the background noise in the area is low Antennas Antennas can be either connected directly to the module connectors or connected via 50 ohm coaxial cable e g RG58 Cellfoil or RG213 terminated with a male SMA coaxial connector The higher the antenna is mounted the greater the transmission range will be however as the length of coaxial cable increases so do cable losses The net gain of an antenna cable configuration is the gain of the antenna in dBi less the loss in the coaxial cable in dB The maximum net gain of the antenna cable configuration connected to the TX RX connector is OdB in Europe 100mW ERP In USA Canada and Australia 4W ERP the maximum gain is 12
29. of a register may be accessed as a discrete value The main use for the general purpose I O registers is for intermediate storage i e when transferring I O from one Modbus Slave device to another Also provided is the status of the onboard digital I O as well as the status of the wireless link The 16 bit status register contains the value FFFF hex for ON and 0000 hex for OFF Inverted status registers are also provided where the registers contain 0000 hex for ON and FFFF hex for OFF Page 55 240U E Wireless Ethernet Registers Purpose 1 4299 General purpose I O registers read write 4300 On board Digital Input value read only 4301 Link Status read only 4320 On board Digital Output value read write 4370 On board Digital Input inverted value read only 4371 Link Status inverted read only 4372 4999 Reserved for future use Modbus TCP Client Master enables the 240U E to connect to one or more Modbus TCP Servers Slaves All Modbus Master messages are directed either to from the onboard I O registers depending on configuration described below The Modbus TCP Client may also poll Modbus RTU i e serial devices connected to either the local serial port or a remote 240U E serial port by enabling the Modbus TCP to RTU gateway at the corresponding serial port see section 3 13 3 Modbus TCP to RTU Gateway Modbus TCP Client functionality allows connections to a maximum
30. startup diagnostics the unit shuts down and remains in shutdown until the fault is rectified Boot Loader LED Indication during Startup Serial LAN LINK ACTIVE Comment Orange Orange Orange RED Initial Power Up amp bootload Initialisation RED Orange Orange RED Check Config amp Print Sign on message If boot delay not zero Orange Orange Orange RED Print Configuration Table to terminal If boot delay not zero Green LAN Off RED Initialise Networking and Start Auto Boot sequence Orange LAN Off GREEN Wait for lt ENTER gt to abort Auto boot If boot delay not zero Sequence LAN Sequence GREEN Boot loader active auto boot aborted or no application SERIAL LAN LINK GREEN Normal Operation Application Running Page 69 240U E Wireless Ethernet 4 2 Diagnostic Information Available 4 2 1 Connectivity The Connectivity webpage at an Access Point lists all Clients with which it is associated The page also indicates whether the encryption scheme has been authorized at the Access Point A 240U E will fail to be authorized if the encryption keys are incorrect The received signal strength background noise and radio data rate is listed for each Client or Access Point by their MAC Address The readings shown are based upon the last received data message from the Access Point or Client Generating radio traffic to the device will update values for signal strength backgr
31. to 11 may be configured at the Access Point Refer Section 3 2 By default radio channel is set to 3 Beacon Interval This interval is the period between beacon transmissions sent by an Access Point The default value is 100 milliseconds and it may be adjusted from 50 to 4095 milliseconds RTS Threshold RTS frames can be used to help avoid radio collisions between two stations that cannot directly hear each other Any frame larger than RTS Threshold bytes will be preceded by an RTS message Fragmentation Threshold STA only The maximum transmission unit MTU of data over the radio If more than this number of bytes is input into the module it will be transmitted in more than one message or fragment Fallback Probation Counter When one of the fallback data rates is selected the radio data rate may be upgraded to the next highest rate after this many consecutive successful transmissions The default value is 10 Fallback Probation Timer When one of the fallback data rates is selected the radio data rate may be upgraded to the next highest rate after this amount of time is spent at a lower rate The default value is 20 seconds Disable SSID broadcast This should be used to prevent unwanted eavesdroppers from detecting the radio network System Address SSID by passively listening to beacon transmissions from the Access Point When disabled Access Points will not transmit the System Address openly in
32. will delete the unwanted routing table E e LS sega ae Access i route CHANGE modifies an existing route Point Client Bridge An example of a routing table is shown for the Router j configuration below man_240E_v1 13 doc Chapter Four Network A Settings IP Address 192 168 0 17 Subnet Mask 255 255 255 0 Gateway IP 192 168 0 1 Access Point Router Settings Gateway IP 192 168 0 1 Ethernet IP 192 168 0 191 Subnet Mask 255 255 255 0 Wireless IP 192 168 2 051 Subnet Mask 255 255 255 0 Diagnostics Client Bridge Settings Gateway IP 192 168 2 51 Ethernet IP 192 168 2 50 Subnet Mask 255 255 255 0 Wireless IP 192 168 2 50 Subnet Mask 255 255 255 0 Network B Settings IP Address 192 168 2 201 Subnet Mask 255 255 255 0 Gateway IP 192 168 2 51 In the Network A PC a routing rule is to be set This will allow Network A amp B to have access to each other This is entered under cmd prompt Route ADD 192 168 2 0 MASK 255 255 255 0 192 168 0 191 This says access everything on network B 192 168 2 0 with the Mask of 255 255 255 0 on Network A via the Ethernet IP Interface 192 168 0 191 IP Address 192 168 2 0 will allow everything on this network to be shared by the router When adding a routing table you will need to enter this in Once entered in the Router will determine whether to pass information over the router if it is addressed to do so or not For added security MAC address filtering could be added as mentioned earlier i
33. 0U E client must act as a proxy for devices lying on its wired Ethernet port and use its own MAC address on their behalf To do this it analyzes the IP addresses within the Ethernet frame body and builds a lookup table so that when radio traffic is received it can lookup the device MAC address based on its IP address This functionality is referred to as Layer 3 Bridge Note that because the layer 3 bridge relies on IP it is only suitable for bridging Ethernet frames from devices that communicate using IP For this reason the bridge Spanning Tree Protocol can not be used with 3 address mode When a man_240E_v1 13 doc Chapter Three Operation 240U E client station uses 3 address mode any Access Point that it is to communicate with may be configured for either 3 or 4 address mode i e Access Point mode does not matter 4 address mode allows a 240U E client station to bridge traffic from devices connected to its wired Ethernet port without acting as a proxy for their MAC address This means that a 240U E client station in 4 address mode can bridge any Ethernet traffic not just IP based traffic as with 3 address mode 4 address mode should also be used if the bridge Spanning Tree Protocol is required When a 240U E client station uses 4 address mode any Access Point that it is to communicate with must also be configured for 4 address mode Router Operation A router joins separate Ethernet networks together The router has different IP
34. 12MHz to 2462MHz Each channel is 22MHz wide and has a channel separation of 5 MHz to the adjacent channel Only one of these channels is used for a connection The desired channel is selected and configured at the Access Point and is then used for all beacon transmissions and connections Clients scan all 11 channels for a suitable Access Point and then adopt the same channel as the AP when a connection is established Although the channel separation is only SMHz wide the radio transmissions are a lot wider Hence the channels overlap The following diagram shows the RF energy distribution for a WiFi transmission f 33 f 22 f 11 f f 11 f 22 33 RF power distribution in a WiFi transmission with channel central frequency f Most of the energy is in a central 22 MHz wide lobe centered around the channel frequency however there are also side lobes extending either side If we ignore the side lobes and consider each WiFi message as a 22MHz wide transmission then the following diagram represents how transmissions in each channel overlaps If there is more than one WiFi AP within the same wireless range then it is important that the AP s are on channels as far apart as possible If there are only two AP s then set them to 1 and 11 If there are three set them to 1 6 and 11 It is also important that correct channel is selected for region Channels 1 to 11 are approved for North America FCC Europe ETSI Canada IC and Austral
35. 200mA E com 240U E at 24V for the 100mW RF unit 7 E Dio and 500mA at 12V 350mA at 24V for the 300mW RF unit A Ground Terminal is provided on the back of the module This Terminal should be connected to the Main Ground point of the installation in order to provide efficient surge protection for the module refer to the Installation Diagram 2 4 Serial Connections 2 4 1 RS232 Serial Port The serial port is a 9 pin DB9 female and provides for connection to a host device as well as a PC terminal for configuration field testing and for factory testing Communication is via standard RS232 signals The 240U E is configured as DCE equipment with the pinouts detailed below DCE HOST MODEM DCE HOST DB9 DB9 DB9 FEMALE MALE MALE Hardware handshaking using the CTS RTS lines is provided The CTS RTS lines may be used to reflect the status of the local unit s input buffer The 240U E does not support XON XOFF Page 15 240U E Wireless Ethernet Example cable drawings for connection to a DTE host a PC or another DCE hosts or modem are detailed above DB9 Connector Pinouts Pin Name Direction Function E o mim os ou ome amei fers ou Tomem ooo ou fume SSS 2 4 2 RS485 Serial Port The RS485 port provides for communication between the 240U E unit and its host device using a multi drop cable Up to 32 devices may be connected in each multi drop network As the RS485 communication medium is shar
36. 3 bytes 32 time 165ms TTL 128 from 192 168 123 bytes 32 time 54ms TTL 128 from 192 168 123 bytes 32 time 54ms TTL 128 from 192 168 123 2 bytes 32 time 54ms TTL 128 Ping statistics for 192 168 123 2 Packets Sent 1586 Received 1573 Lost 13 z loss gt Approximate round trip times in milli seconds Minimum 53ms Maximum 145ims Average ES 4 4 2 IPCONFIG IPCONFIG can be used to show your current TCP IP information including your address DNS server addresses adapter type and so on E Command Pro 5 x Microsoft Windows 2000 Version 5 00 2195 lt C Copyright 1985 2666 Microsoft Corp C Documents and Settings Support gt cd C Documents and Settings gt cd C gt ipconf ig Windows 2666 IP Configuration Ethernet adapter Local Area Connection Connection specific DNS Suffix LP Addresa ss cial teja sui dei pa 192 168 80 17 Subnet Mask ar 255 255 255 0 Default Gateway 192 168 8 1 In the above example ipconfig was entered in the command prompt The reply back shows the PC s IP address Subnet mask and the gateway it is connected to Other ipconfig commands will return back more information The hardware or MAC address of the computer may be discovered using the command ipconfig all Ipconfig will list all of the commands and their usages available for use 4 4 3 ARP Page 75 240U E Wireless Ethernet Displays and modifies the IP to Physical address tr
37. 55 0 Set the Wireless IP address to 169 254 102 53 network mask 255 255 255 0 Click on button Save to Flash and Reset Webpage will display that message indicating details are being written to flash Wait for 240U E to reboot before removing power Extending range of a network with a Repeater hop 192 168 0 0 i s Ci 255 255 255 0 a ee bp Point A zi Client 2 LAN Client 1 Configure units as described in Section Extending a wired network Place the Access Point at the remote intermediate repeater location Additional repeaters can be added using Wireless Distribution System WDS refer section 3 10 Repeater Configuration for further details man_240E_v1 13 doc Chapter Four Chapter Four 4 1 Diagnostics DIAGNOSTICS Diagnostics Chart GREEN Normal Operation RED Supply voltage too low Radio RX GREEN flash Radio receiving data Radio TX Radio Transmitting Radio LINK On On when a radio communications link is established Radio LINK LAN LAN Off Communications failure or radio link not established Link Established on Ethernet port Activity on Ethernet port Rs232 Serial Port Activity Rs485 Serial Port Activity Digital Output OFF and Input is open circuit The green OK LED on the front panel indicates correct operation of the unit This LED turns red on failure as described above When the OK LED turns red shutdown state is indicated On processor failure or on failure during
38. Chapter One Introduction Important Notice ELPRO products are designed to be used in industrial environments by experienced industrial engineering personnel with adequate knowledge of safety design considerations ELPRO radio products are used on unprotected license free radio bands with radio noise and interference The products are designed to operate in the presence of noise and interference however in an extreme case radio noise and interference could cause product operation delays or operation failure Like all industrial electronic products ELPRO products can fail in a variety of modes due to misuse age or malfunction We recommend that users and designers design systems using design techniques intended to prevent personal injury or damage during product operation and provide failure tolerant systems to prevent personal injury or damage in the event of product failure Designers must warn users of the equipment or systems if adequate protection against failure has not been included in the system design Designers must include this Important Notice in operating procedures and system manuals These products should not be used in non industrial applications or life support systems without consulting ELPRO Technologies first 1 A radio license is not required in some countries provided the module is installed using the aerial and equipment configuration described in the 240U E Installation Guide Check with your local distributor for
39. Edit View Favorites Tools Help a sox X gt Y x B A DO Search Se Favorites par w LJ rel 2 Address E http 192 168 0 212 webfdigio asp Go Links Shared Digital I O Status Digital Input is OFF Digital Output is OFF Switch DOT ON Communications Failure Digital Output on Communications Failure No Action The Digital I O channel can be transferred to from another device using Modbus see section 3 15 Modbus I O Transfer below or it can be configured to provide status of the module communications If the 240U E disassociates from another unit that is there is no wireless link you can configure the digital output to turn ON set or OFF drop 3 15 Modbus I O Transfer The 240U E provides Modbus TCP Client and Modbus TCP Server functionality for I O transfer 5000 x 16bit general purpose registers are provided for Modbus including the onboard Digital Input Output and are shared for both Client and Server Modbus TCP Client Master and Modbus TCP Server Slave are both supported simultaneously and when combined with the built in Modbus TCP to RTU Gateway the 240U E can transfer I O to from almost any combination of Modbus TCP or RTU devices The layout of the 240U E I O Registers is summarized in the table below Each register is internally saved as a 16 bit value A Modbus transaction may access the entire 16 bit value of any register or alternatively the most significant bit
40. Ethernet protocols other than IP are to be used see section 3 7 Normal Operation for more details Each 240U E Access Point supports up to 6 separate interfaces for WDS links to other Access Points Each WDS interface can be either a bridge or router interface refer section 1 1 Network Topology for more information on bridge vs router If you need a simple repeater network use a bridge interface A WDS bridge interface allows traffic to be bridged to another Access Point on the same IP network WDS bridge interfaces do not require additional IP Address configuration as they are bridged with the standard wireless interface that is used for connections to associated clients All 6 WDS interfaces on the one Access Point may be bridged if required WDS bridge interfaces have the advantage that redundant paths are permitted when using the bridge Spanning Tree Protocol see section 3 9 Spanning Tree Protocol thus behaving as a self healing mesh network Bridged networks are also not as configuration intensive as routed networks Since WDS bridge interfaces generally do not require IP address configuration they inherit the IP address of the standard wireless interface they can be configured to automatically connect to other WDS enabled Access Points A WDS router interface allows traffic to be routed to an Access Point on a different network and therefore requires configuration of an IP address to reflect the network address o
41. ISO that consists of seven different levels or layers By standardizing these layers and the interfaces in between different portions of a given protocol can be modified or changed as technologies advance or systems requirements are altered The seven layers are Physical Data Link Network Transport Session Presentation Application LAN A system of connecting PCs and other devices within the same physical proximity for sharing resources such as an Internet connections printers files Page 87 240U E Wireless Ethernet and drives Receive The minimum signal strength required to pick up a signal Higher bandwidth Sensitivity connections have less receive sensitivity than lower bandwidth connections Router A device that forwards data from one WLAN or wired local area network to another SNR Signal to Noise Ratio The number of decibels difference between the signal strength and background noise Transmit Power The power usually expressed in mW or db that the wireless device transmits at MAC Address A MAC address short for Media Access Control address is a unique code assigned to most forms of networking hardware The address is permanently assigned to the hardware so limiting a wireless network s access to hardware such as wireless cards 1s a security feature employed by closed wireless networks But an experienced hacker armed with the proper tools can still figure ou
42. JO search Sie Favorites e A E 7 K Ly a 3 http 192 168 123 204 goform formComms v g Go Use of this feature together with the Connectivity webpage will reveal the variability of communications over a link and other systems that may be in the area Page 71 240U E Wireless Ethernet 4 2 3 Statistics The Statistics webpage is used for advanced debugging of 240U E This webpage details the state of the 240U E and its performance in the system 2 Statistics Microsoft Internet Explorer File Edit View Favorites Tools Help O e Er O x a JO search SP Favorites e B a vr E LJ Fel 3 Address l http 192 168 123 204 webfstats asp ELPRO Technologies Statistics Up Time Module Up Time 0 hours 47 minutes 28 seconds Distributed System Up Time 0 hours 47 minutes 28 seconds Routes Destination Gatevay Mask Hw Flags Refs Use Expire Interface default 192 168 123 1 UGS 0 0 fecO 127 0 0 1 127 0 0 1 UH D lo0 192 168 123 0 255 255 255 0 U D fecO 192 168 123 1 UHL 1 fecoO 192 168 123 217 00 40 F6 D4 43 F1 UHL 1 fecoO D D o 4 TP Statistics l http 192 168 123 204 webfinfoset asp __ O Internet 4 2 4 Network Traffic Analysis There are many devices and PC programs that will analyse performance of an Ethernet network Freely available programs such as Ethereal provide a simple cost effective means for more advanced analysis By monitoring traff
43. Section 3 7 A 240U E Client will act as a MAC Address translator as it acts as a MAC address proxy on behalf of devices connected to its wired Ethernet port Addition of 240U E Client MAC addresses into intermediate 240U E units whitelist filters may be required for correct operation It is advisable to use the Apply Changes button to test the configuration entered Once the configuration is determined to be correct the Apply Changes and Save button should be used In the event that the configuration is incorrect a power reset will revert the unit to previously saved configuration If an erroneous configuration has prevented all access to the module SETUP mode may be used to analyze what is wrong with the configuration Simply switch the dipswitch to SETUP and cycle power The 240U E will retain its configuration however will load with the IP address 192 168 0 1XX netmask 255 255 255 0 with the radio and filter disabled The XX in the IP address is the last two digits of the serial number Configuration web pages will still show the original configuration No changes are made to configuration until the user saves changes To resume normal operation set the dipswitch to RUN and cycle power MAC Address Filter Configuration Add Entries Enter the MAC addresses of devices to be added to the list Multiple entries must be separated by a semi colon Delete Entries Check the box alongside entries selected for removal from the lis
44. TIC INFORMATION AVAILABLE ccscsssscsccccccccssssscsccccceccesssscsscsccessesuensusesees 70 4 2 1 COME as 70 4 2 2 Monitor COMMUNICATIONS sesir i N N 71 4 2 3 SAUS e ee eens T2 4 2 4 Network Trac Analysis 12 4 3 TESTING RADIO PATAS E E TAA E E E E OEE 73 4 4 LITE SS lo dt dat E EER e 73 AM PING a dd ia Bea ee 73 Ad JIPCONE Guri rd ria 75 JAA ROUTE AR E RA TIT ARE Ses EO SR O 76 CHAPTER FIVE SPECIFICATIONS e eoeoeoeoeoeoeoeoeoeoececeseoeoeseoeoeseseseseoeseoeseoeoesssesso 78 APPENDIX A FIRMWARE UPGRADE ccccccccococononononononononononononononononononononocanenenanenenes 80 APPENDIX B GLOSSARY cissceticsstscsicsccciscecccccaicccocedasscescsncscecdacecacscosascocsdasseesesaassocdaaacacecs 85 APPENDIX C EUROPEAN COMPLIANCE cccccscscssssssssssscssscscccccccscccscscccscsesesssees 91 man_240E_v1 13 doc Chapter One Introduction Chapter One INTRODUCTION The 240U E Industrial WiFi Wireless Ethernet module provides wireless connections between Ethernet devices or Ethernet wired networks LAN s It complies with the IEEE 802 11b standard The 240U E has an internal 2 4GHz direct sequence spread spectrum DSSS wireless transceiver which can be used without a radio license in most countries Users can select one of 11 x 5 MHz wide channels with the first channel centered at 2 412 GHz Note that regulations in North America and part of Europe permit all 11 channels to be used in these countries Please che
45. a time Enable RS 485 Modbus Check this box to enable the Modbus TCP to RTU Gateway on the RS TCP to RTU Gateway 485 port Only a single serial port is allowed at a time Data Rate The serial data rate desired Serial data rates available range from 110bps to a maximum of 115 200bps The data format desired Data formats of 8N1 7E1 701 7E2 702 are supported Data Bits Parity Stop Bits Pause Between Requests Enter the delay between serial request retries in milliseconds Response Timeout Enter the serial response timeout in milliseconds a serial retry will be sent if a response is not received within this timeout Connection Timeout Enter the TCP connection timeout in seconds if no Modbus TCP data 1s received within this timeout then the TCP connection will be dropped Set this field to zero for no timeout Maximum Request Retries Enter the maximum number of request retries performed serially Maximum Connections Enter the maximum number of simultaneous TCP connections to the server allowed man_240E_v1 13 doc Chapter Three Operation 3 14 Digital Input Output The functionality of the shared Digital Input Output pin may be configured via the I O Transfer internal webpage As this pin is shared the Digital Input status will be ON when the Digital Output 1s set ON A Digital Input Output Configuration Microsoft Internet Explorer Bel x File
46. address on a different network it checks if the network address matches the network address of one of its own interfaces 1 e hard wired Ethernet or wireless Ethernet or WDS and forwards the frame appropriately However if the IP network address does not match any of its interfaces the 240U E will forward the frame to its default gateway In this case it is assumed that the default gateway has a valid route to the destination In some cases it is not practical to have just one default gateway i e routed wireless networks with more than two 240U E routers and in some cases when WDS router interfaces are used If more than one next hop router is required the 240U E allows for up to 30 routing rules to be configured A routing rule specifies a destination network or host IP address and the corresponding next hop router that messages for the specified destination will be forwarded to It is assumed that the next hop router or gateway will then deliver the data to the required destination or forward it on to another router that will 192 168 0 34 192 168 0 72 MS Client fig Y bier ient PE x Sa D 192 168 0 34 aa Bridge SE 192 168 0 72 LAN A NG ni ON Access Point Bridge E e 78 192 168 0 74 q LEL i 169 254 102 17 E gui it tan c s 169 254 109 40 Alice oe aon LAN B Client Router The above network diagram illustrates a situation where routing rules may need to be configured In this e
47. addresses on its wired and wireless ports reflecting the different IP addresses of the separate Ethernet networks All the devices in the separate networks identify the router by IP address as their gateway to the other network When devices on one network wish to communicate with devices on the other network they direct their packets at the router for forwarding As the router has an IP address on each of the networks it joins 1t inherently knows the packet identity If the traffic directed at the router can not be identified for any of the networks to which it is connected the router must consult its routing rules as to where to direct the traffic to For details on configuring routing rules see section 3 11 Routing Rules 3 8 Radio Configuration The 240U E can be configured for different radio transmission rates A reduction in rate increases the reliable range transmission distance The factory default data rate settings are suitable for the majority of applications and should only be modified by experienced users The 240U E allows for configurable fixed or fallback radio transmission Data Rates When a fixed rate is configured the radio transmission rate is never altered even under extremely poor conditions The fallback rates allow a maximum rate to be configured whilst enabling the unit to automatically reduce the rate when transmit errors occur When a radio transmission is unsuccessful the 240U E will automatically drop to the n
48. an ACK packet is not received the transmitting station will wait for a subsequent opportunity to retry transmission CSMA CD A method of managing traffic and reducing noise on an Ethernet network A network device transmits data after detecting that a channel is available However if two devices transmit data simultaneously the sending devices detect a collision and retransmit after a random time delay DHCP A utility that enables a server to dynamically assign IP addresses from a Page 85 240U E Wireless Ethernet predefined list and limit their time of use so that they can be reassigned Without DHCP an IT Manager would have to manually enter in all the IP addresses of all the computers on the network When DHCP is used whenever a computer logs onto the network it automatically gets an IP address assigned to it Dial up A communication connection via the standard telephone network or Plain Old Telephone Service POTS DNS A program that translates URLs to IP addresses by accessing a database maintained on a collection of Internet servers The program works behind the scenes to facilitate surfing the Web with alpha versus numeric addresses A DNS server converts a name like mywebsite com to a series of numbers like 107 22 55 26 Every website has its own specific IP address on the Internet DSL Various technology protocols for high speed data voice and video transmission over ordi
49. an operating ethernet port 4 Ensure your PC network settings have a Subnet Mask of 255 255 255 0 This can be easily checked using DOS command IPCONFIG amp Command Prompt Microsoft Windows XP Version 5 1 2600 lt C Copyright 1985 2661 Microsoft Corp C Documents and Settings andrew sinclair gt ipconf ig Windows IP Configuration Ethernet adapter Local Area Connection 2 Connection specific DNS Suffix IP Address 192 168 123 217 Subnet Mask 255 255 255 0 IP Address fe80 240 f6ff fed4 43f1z4 Default Gateway 2 5 Extract FlashUpdate program and start the program man_240E_v1 13 doc Appendix A Firmware Upgrade 6 If you are running Windows firewall you may be prompted with the following message Select Unblock so that FlashUpdate program may operate If any other firewall software is operating disable it Windows Security Alert some features of this program Y To help protect your computer Windows Firewall has blocked Do you want to keep blocking this program 1 Name FlashUpdate_1 0 Publisher Unknown Keep Blocking Unblock Ask Me Later Windows Firewall has blocked this program from accepting connections from the Internet or a network If you recognize the program or trust the publisher you can unblock it When should unblock a program 7 Copy new firmware files to a known location on the hard drive of your PC Do not unzip these files 8 Speci
50. aning that a total of 10 remote TCP IP clients may connect to this Routing Server Modbus Mode is selected so that the 240U E can route Modbus frames directly to their intended destination Max Poll Fails is set to 5 meaning that if 5 consecutive Modbus requests directed to a particular Modbus Slave fail to get a response then the routing table entry for that slave device will be deleted Inactivity Timeout is set to 0 so that Inactivity Timeouts will not apply for this Routing Server Similarly Keep alive messages are not sent on inactivity Finally a password has not been specified meaning that any remote TCP IP client may connect to this Routing Server The second entry in the example has been configured to operate in the generic Master Slave protocol mode The main difference between the configuration of this entry and that of the Modbus aware server configuration is that the Modbus Mode option is not selected Consequently the Max Poll Fail parameter cannot apply when the specific protocol is unknown and is therefore set to zero Finally since the protocol is some sort of a generic Master Slave type we specify the Master Port as the port that the remote Master must connect to and the Slave Port as the port that all remote slave devices must connect to Data arriving at the Master Port will then be broadcast to all devices connected to the Slave Port whereas data arriving at the Slave port will be forwarded to the Master Port only The third
51. anslation tables used by Address Resolution Protocol ARP Once a remote computer has been pinged this can be used to see the IP address MAC address of the remote computer It will also show any other devices on the network that it may be connected to 4 Command Prompt Civdarp a Interface 192 168 0 17 on Interface Bx1000003 Internet Address Physical Address pe y 192 168 6 266 66 Ge Gc 3e 14 68 dynamic CIN gt Command used for above screen shot is Arp a It shows the PC s direct IP address of 192 168 0 17 as also shown before with IPCONFIG command The other IP address shown with its associated MAC address is another device with a connection to the PC In this example it is the IP address of a PLC connected to the PC also Arp n lists all the commands available for this function 4 4 4 ROUTE Route is used for the Router function This is where you are joining 2 different networks together via the 240U E refer to Section 1 1 The 240U E can only accept 1 Routing table That is it can only accept one router per network of radios On the Router radio network PC a routing rule needs to entered to allow access between Network A and Network B This is entered in the command prompt as per all other instruction above Route PRINT will show all active routes on PC Route ADD will add a routing table to network Network A 7 J Network B route DELETE lt destination netmask gateway q q interface gt
52. ccess Points are all at fixed locations each of the Access Points could of course have one or more client stations connected Since the locations are fixed we can avoid the overhead of using the Bridge Spanning Tree protocol here by configuring fixed WDS links to ensure that each Access Point will only connect to the next Access Point in the chain Any number of additional intermediate repeaters could be added to the chain in a similar way Access Point Access Point Access Point 192 168 0 10 192 168 0 20 192 168 0 30 g _ WDS Bridae__ E __WDS Bridae __ 1 No Encryption gi WPA AES Encryption B WDS Configuration Windows Internet Explorer G Gy le http 192 168 0 100 web wds24 asp File Edit View Favorites Tools Help w k wos Configuration Wireless Mode Layer 3 bridge 3 address mode O WDS IEEE802 11 4 address mode Bridge Spanning Tree Protocol O Bridge Priority 32768 Bridge Hello Time 32 xx 125msec Bridge Forward Delay 80 Lx 125msec Bridge Maximum Age 160 x 125msec AP to AP Connections Auto connect to WDS enabled APs O Only connect to APs in list below Maximum WDS connections to this device 2 0 AP to AP Connection Threshold os dBm AP to AP Disconnection Threshold os dBm Allow WDS Connections with the following Access Points Add Entry Delete Entry SSID MAC Address Encryption Passphrase Router IP Router Subnet 1 JA None he 2 B WPA PSK
53. channel is suitable for voltage free contacts such as mechanical switches or NPN transistor devices such as electronic proximity switches PNP transistor devices are not suitable Contact wetting current of approximately 5mA is provided to maintain reliable operation of driving relays The digital input is connected between the DIO terminal and common COM The I O circuit includes a LED indicator which is lit when the digital input is active that is when the input circuit is closed Provided the resistance of the switching device is less than 200 ohms the device will be able to activate the digital input Voltage free contact input The I O channel may also be used as a discrete output The digital outputs are transistor switched DC signals FET output to common rated at 30VDC 500 mA The output circuit is connected to the DIO terminal The digital output circuit includes a LED indicator which is lit when the digital output is active Max 30VDC ol 0 5A E 240U E man 240E vl 13 doc Chapter Three Operation Chapter Three OPERATION 3 1 Start up Access Point Start up An Access Point AP unit starts and immediately begins transmitting periodic messages called beacons on the configured channel Beacons include capability information that a Client may examine in order to identify if the Access Point is suitable for link establishment Clients will only attempt to establish a link with an Access Point whose beacon
54. ck with your ELPRO representative for the permitted channel usage in your country The 240U E unit also provides two serial connections as well as the Ethernet connections It is possible to use all three data connections concurrently allowing the 240U E to act as a Device Server Wireless connections can be made between serial devices and Ethernet devices however appropriate driver applications are required in the host devices to handle the different data format The 240U E does provide connection functionality between serial Modbus RTU devices and Ethernet Modbus TCP devices The 240U E is available in two models with different RF power 240U E 100 100mW of RF power 240U E 300 300mW of RF power Note that European regulations do not permit more than 100mW of RF power to be used Operation in France Italy Luxembourg Norway and the Russian Federation is limited to indoor use only Refer to Appendix C for clarification In USA Canada and Australia up to IW of RF power may be generated In other countries please check with your ELPRO representative The 240U E has a standard RJ45 Ethernet connection which will operate at up to 100Mbit sec The module will transmit the Ethernet messages on the wireless band at rates between 1 and 11 Mbit sec 1 1 Network Topology The 240U E is an Ethernet device and must be configured as part of an Ethernet network Each 240U E must be configured as lt o 439 pa Ether
55. configuration with the following differences e set the Ethernet and Wireless IP addresses of 240U E to 192 168 0 201 e set the Operating Mode to Client Ensure the same System Generator String is used and the same Radio Encryption method is selected Client 2 Configuration e As above however set the Ethernet and Wireless IP addresses as 192 168 0 202 Connecting two separate networks together 169 254 102 54 169 254 102 53 a al 192 168 0 200 4 L 169 254 102 53 255 255 255 0 255 255 255 0 LAN A a E ca LAN B Client Access Point l Router Bridge Internet Network A Configuration In this example network A is connected to the internet via a router at IP address 192 168 0 1 Devices on Network A that only require access to devices on Networks A and B should have their gateway IP address set to the 240U E Access Point as 192 168 0 200 Devices on Network A that must interact with devices on Networks A and B and the internet should set the internet router 192 168 0 1 as their gateway and must have a routing rule established for devices on Network B On PCs this may be achieved with the MS DOS command ROUTE For this example use ROUTE ADD 169 254 102 0 MASK 255 255 255 0 192 168 0 200 Network B Configuration All devices on Network B should be configured so their gateway IP address is that of the 240U E Access Point as 169 254 102 54 Access Point Configuration e Connect straight through Ethernet cable between PC
56. d point of a WDS link have the same network address so by using a different network address to that of the default interface we ensure that each end point has a different network address than its default interface This ensures that the WDS links at either end point are not bridged with their default interface since in this example we wish to eliminate the overhead associated with a bridged interface WDS Configuration Windows Internet Explorer 6 EY y E http 192 168 0 100 web wds24 asp File Edit View Favorites Tools Help ew wos Configuration gt Bl ae peace Pros Wireless Mode Layer 3 bridge 3 address mode O WDS IEEE802 11 4 address mode Bridge Spanning Tree Protocol O Bridge Priority 32768 Bridge Hello Time 32 x125msec Bridge Forward Delay 80 x125msec Bridge Maximum Age 160 x 125msec AP to AP Connections Auto connect to WDS enabled APs O Only connect to APs in list below Maximum WDS connections to this device 3 4 AP to AP Connection Threshold 105 dBm AP to AP Disconnection Threshold 105 dBm Allow WDS Connections with the following Access Points Add Entry Delete Entry MAC Address Encryption Passphrase Router IP Router Subnet STP 169 254 003 255 255 255 0 O 169 254 5 3 12552552550 O v 1 a Al internet amp 100 man_240E_v1 13 doc
57. dB for the 240U E 300 or 16dB for the 240U E 100 There is no gain restriction for antennas connected to the RX connector man_240E_y1 13 doc Chapter Two Installation The gains and losses of typical antennas are Antenna Gain dBi Dipole 2 Collinear 5 or 8 Directional 10 28 Cable type Loss dB per 10 m 30 ft RGS58 Cellfoil 6 RG213 5 LDF4 50 1 5 The net gain of the antenna cable configuration is determined by adding the antenna gain and the cable loss For example a 5dBi antenna with 10 meters of Cellfoil has a net gain of 1 dB SdB 6dB Installation tips Connections between the antenna and coaxial cable should be carefully taped to prevent ingress of moisture Moisture ingress in the coaxial cable is a common cause for problems with radio systems as it greatly increases the radio losses We recommend that the connection be taped firstly with a layer of PVC Tape then with a vulcanizing tape such as 3M 23 tape and finally with another layer of PVC UV Stabilized insulating tape The first layer of tape allows the joint to be easily inspected when trouble shooting as the vulcanizing seal can be easily removed Where antennas are mounted on elevated masts the masts should be effectively earthed to avoid lightning surges For high lightning risk areas surge suppression devices between the module and the antenna are recommended If the antenna is not already shielded from lightning strike by an adjacent ear
58. desired Data formats of 8N1 7E1 701 7E2 702 are supported Character Timeout Enter the maximum delay in msec between received serial characters before packet is sent via network Server When configured as Server the module will wait for a connection to be initiated by a remote client Listen Port Server Only Enter the TCP port number on which the server must listen for incoming connections The standard TELNET port is 23 Client When configured as Client the module will automatically attempt to connect to the specified remote server Remote Device Port Client only Enter the TCP port number of the remote server i e the remote port to automatically connect to Remote Device IP Address Client only Enter the IP Address of the remote server i e the remote IP Address to automatically connect to Multicast Group Port Enter the UDP port number that all members of the group will use i e all group members should use the same port number Multicast Group IP Enter a valid Multicast IP Address identifying the group i e all group members should use the same Multicast Group IP Address Valid Multicast IP Addresses are in the range 224 0 1 0 to 238 255 255 255 Page 53 240U E Wireless Ethernet 3 13 3 Modbus TCP to RTU Gateway The Modbus TCP to RTU Gateway allows an Ethernet Modbus TCP Client Master to communicate with a serial Modbus RTU Slave Th
59. e Module is mounted using the spring loaded DIN Rail mounts located on the back of the module To mount clip the top of the DIN Rail clip on to the DIN rail and then press the module back firmly until it clicks into place To release firmly pull the bottom of the module toward you All connections to the module must be SELV Normal 110 250V mains supply should not be connected to any terminal of the 240U E module Refer to Section 2 3 Power Supply Before installing a new system it is preferable to bench test the complete system Configuration problems are easier to recognize when the system units are adjacent Following installation the most common problem is poor communications caused by incorrectly installed antennas or radio interference on the same channel or the radio path being inadequate If the radio path is a problem i e path too long or obstructions in the way then higher performance antennas or a higher mounting point for the antenna may rectify the problem Alternately use an intermediate 240U E Module as a repeater The foldout sheet 240U E Installation Guide provides an installation drawing appropriate to most applications Further information is detailed below Each 240U E module should be effectively earthed via the GND terminal on the 240U E module this is to ensure that the surge protection circuits inside the 240U E module are effective 2 2 Antenna Installation The 240U E module will operate reliably over lar
60. e 240U E makes this possible by internally performing the necessary protocol conversion The conversion is always performed by the 240U E which is directly connected to the Modbus serial device 1 e only this module needs to have Modbus TCP to RTU Gateway enabled Client Access Point RS232 Modbus RTU E Fl Slave LAN E RS232 Modbus TCP to RT Modbus TCP U Gateway Client Master The above example demonstrates how a Modbus TCP Client Master can connect to one or more Modbus RTU i e serial Slaves In this example the 240U E Access Point is configured with the RS232 Modbus TCP to RTU Gateway enabled Once enabled the gateway converts the Modbus TCP queries received from the Master into Modbus RTU queries and forwards these over the RS232 port to the Slave When the serial response to the query arrives from the Slave it is converted to a Modbus TCP response and forwarded via the network to the Modbus TCP Master If no response was received serially by the 240U E within the configured Response Timeout the 240U E will initiate a number of retries specified by the configured Maximum Request Retries The Modbus TCP to RTU Gateway may be configured to operate on either the RS 232 or RS 485 port It does not support operation on both ports at the same time Enable RS 232 Modbus Check this box to enable the Modbus TCP to RTU Gateway on the RS TCP to RTU Gateway 232 port Only a single serial port is allowed at
61. e configuration of unit B is shown below accessible via the I O Transfer configuration page It can be seen that Modbus TCP Client has been enabled with a 500msec scan rate meaning that there will be a 500msec delay between each of the mappings directed at any server The Reset Registers on Comms Fail option is enabled with a timeout of 60 seconds indicating that any of the registers at unit B will be reset if a successful Modbus transaction involving that register has not been executed in the last 60 seconds The Modbus TCP to RTU Gateway at B must also be enabled see section 3 13 3 Modbus TCP to RTU Gateway to allow Modbus communications with the serial device A Three Modbus TCP Client Mappings are also configured at B in order to perform the required I O transfer The first mapping transfers the status of the onboard digital input at C to the onboard digital output at B Local Register 4320 specifies the register for the onboard digital output at B since B is the local unit at which the mapping is configured 1 O Count 1 specifies that only one I O point is being transferred i e the single digital I O Function Code 02 Read Discretes specifies the standard Modbus function code to read discrete i e digital inputs Destination Register 4300 specifies the register for the onboard digital input at unit C since C is the destination unit for this mapping Device ID lis the ID of the onboard Modbus TCP Server at C Server
62. ed only one of the units on the RS485 cable may send data at any one time Thus communication protocols based on the RS 485 standard require some type of arbitration RS485 is a balanced differential standard but it is recommended that shielded twisted pair cable be used to interconnect modules to reduce potential RFI It is important to maintain the polarity of the two RS485 wires An RS485 network should be wired as indicated in the diagram below and terminated at each end of the network with a 120 ohm resistor On board 120 ohm resistors are provided and may be engaged by operating the single DIP switch in the end plate next to the RS485 terminals The DIP switch should be in the 1 or on position to connect the resistor If the module is not at one end of the RS485 cable the switch should be off man_240E_y1 13 doc Chapter Two Installation HOST 240U E HOST i l l 1200 Ss S 1200 RS485 CONNECTIONS HOLIMS did SLINVAAC 4 RS485 CONNECTION USING TERMINATING RESISTOR ETHERNET B A COMDIO HUE RS 485 SUPPLY O Page 17 240U E Wireless Ethernet 2 5 Discrete Digital Input Output The 240U E has one on board discrete digital I O channel This channel can act as either a discrete input or discrete output It can be monitored or set remotely or alternatively used to output a communications alarm status If used as an input the I O
63. em Parameters System address Wireless data encryption User Configuration Diagnostics DB9 female DCE 2 pin terminal block 1200 2400 4800 9600 14400 19200 38400 57600 76800 115200 1 to 31 character text string None WEP 64bit and 128bit WPA PSK TKIP Via embedded web page LED s RSSI measurement in dBm Specifications RTS CTS DTR DCD hardware signals provided Max distance 4000 1 2 km 7 or 8 data bits Stop start parity bits configurable Via RS232 commands or RS 232 PPP connection OK DCD Radio and Serial RX TX BER test Page 79 240U E Wireless Ethernet Appendix A FIRMWARE UPGRADE Determine which firmware version is present in the module to be upgraded by viewing the index webpage of the module Firmware versions v1 21 and later may be upgraded via the configuration web pages This upgrade can be done locally with a PC connected directly to the module or remotely over a working radio link For remote upgrade it is advisable to reduce radio traffic over the link from other devices as much as possible If necessary create a temporary separate radio network to perform the upgrade to remote modules Please refer to the Web based Upgrade section for the upgrade procedure Firmware versions prior to v1 21 require must be upgraded using the FlashUpdate utility and can only be performed local to the module The FlashUpdate utility should also be used if firmware ver
64. em error control J Enable modem compression This connection uses the following items I Show terminal window Y7 Internet Protocol TCP IP Enable modem speaker M El QoS Packet Scheduler gt Ea a File and Printer Sharing for Microsoft Networks a Virtual Machine Network Services el Client for Microsoft Networks x Internet Protocol TCP IP Properties 2 x General 13 Select Networking Tab gt click on Internet Protocol TCP IP in list box and then click Properties button You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Gi C Use the following IP address P address Obtain DNS server address automatically Use the following DNS server addresses 14 On Properties form click Advanced button 2x EE Gee PES Altemate DNS server General DNS wins This checkbox only applies when you are connected to a local Advanced network and a dial up network simultaneously When checked data that cannot be sent on the local network is forwarded to the dial up network PPP link Use IP header compression 15 On Advanced TCP IP Settings form gt General Tab uncheck field in PPP link stating Use IP header compression 16 Configuration is now complete Click on this newly created link to establ
65. es The second WDS entry above specifies the WDS link to unit C as a WDS router interface with IP address 169 254 5 3 As with the WDS link to unit A we use a different IP network address than the default interface note that this network address 169 254 5 x is also different to that used for the WDS link to unit A 169 254 0 x so that these separate WDS interfaces are not internally bridged Also as with the WDS link to unit A a routing rule is added to direct traffic destined for the network address of unit C 192 168 6 x So in this example unit B has a total of three IP addresses 192 168 5 3 for the default interface 169 254 0 3 for the WDS link to unit A and 169 254 5 3 for the WDS link to unit C Note that we choose to always use the same host address of 3 for unit B on all of its interfaces regardless of the network address Page 39 240U E Wireless Ethernet The third WDS entry above specifies the WDS link to unit D In the example unit D has the same network address as unit B therefore we wish to have the WDS interface link to unit D bridged with the default interface Because we don t specify a router IP address for the third entry the 240U E automatically bridges this interface with the default wireless interface lox File Edit view Favorites Tools Help A Q Back Q x al A yo Search Se Favorites R gt w rel 3 Address E http 192 168 5 3 webfroute asp y g so Links Pes Routin
66. ess of the 240U E on the wireless port If the unit is configured as a bridge this address will be the same as the Ethernet IP address If configured as a router the IP address must be different from the Ethernet IP Address it must be consistent with the LAN it is connecting to on the wired side Wireless IP Subnet Mask The network mask of the 240U E on the radio port If configured as a Bridge this must be the same as the Ethernet IP Subnet Mask System Address SSID A 240U E network comprises modules with the same system address Only modules with the same system address will communicate with each other The system address is a text string 1 to 31 characters in length Select a text string which identifies for your system Desired BSSID To force a client station to always connect to the same Access Point enter the MAC address of that Access Point in the Desired BSSID field Note that the SSID of the Access Point must also match the configured SSID of the client Radio Encryption Select None WEP 64 bit WEP 128 bit WPA PSK TKIP or WPA PSK AES security encryption of he wireless data The default setting is None man_240E_v1 13 doc Chapter Three Operation Encryption Keys 1 to 4 These are the keys used to encrypt radio data to protect data from unwanted eavesdroppers when WEP Encryption is selected These keys should be the same
67. ess of unit C since the Modbus TCP to RTU Gateway at unit C converts the Modbus TCP message to Modbus RTU and routes it out the serial port to unit D The third mapping takes the 8 registers read by the second mapping and writes them to the serial unit A The specified Device ID 5 is the Modbus Address of the serial device A and the Server IP Address 192 168 0 196 is the IP Address of the local unit B since the local Modbus TCP to RTU Gateway is to route the message out the serial port to unit A Since the 240U E supports Modbus TCP Client and Server simultaneously the Modbus TCP Server for unit B above could also be enabled This would allow one or more external Modbus TCP Clients anywhere on the extended wired or wireless network to connect to unit B and monitor the status of the I O registers including the I O at units A C and D This is a very powerful and flexible feature which could for example be exploited by a central monitoring facility or SCADA man_240E_v1 13 doc Chapter Three Operation The configurable Modbus I O transfer options are summarized in the tables below Modbus TCP Configuration Enable Modbus TCP Server Slave Check this box to enable the onboard Modbus TCP Server All Modbus TCP connections to the module IP Address and specified Modbus Server Device ID will be routed to the onboard I O registers Modbus Server Device ID Specify the Modbus Device ID for the onboard Modbus TCP Server
68. ess only however in that case the Access Point must not have SSID broadcast disabled MAC Address Specify the MAC address of an Access Point to establish a WDS link with Leave this field blank if you wish to connect to any Access Point with the nominated SSID Encryption Select the required Encryption if any for this WDS link If WEP Encryption is required WEP must also be enabled for the default wireless interface and the same WEP key will be inherited Passphrase When WPA Encryption is selected enter the WPA passphrase for this WDS link here Router IP Leave this field blank if this WDS interface is to be bridged with the default wireless interface Otherwise enter the IP address for this Access Point that specifies the IP network to route messages to Router Subnet Leave this field blank if this WDS interface is to be bridged with the default wireless interface Otherwise enter the subnet mask of the network to route messages to STP Applicable to WDS Router interfaces only If two or more WDS router interfaces having the same Router IP Address and Subnet mask become active the 240U E must internally bridge them Select the STP option if you wish to enable the bridge Spanning Tree Protocol for the bridge if this interface is added man_240E_v1 13 doc Chapter Three Operation 3 11 Routing Rules When a 240U E receives an IP frame that is destined for an IP
69. et up in a mesh network to provide multiple repeaters LAN Client Client Client man_240E_v1 13 doc Chapter One Introduction Bridge vs Router Each 240U E is configured with an IP address for the Ethernet side and another for the wireless side A Bridge connects devices within the same Ethernet network for example extending an existing Ethernet LAN For a Bridge 192 168 0 34 192 168 0 72 the IP address for the TRATARA RE wireless side is the same as CI CI Client Bridge the Ethernet side 192 168 0 72 192 168 0 34 LAN Access Point Bridge A Router connects devices on different LAN s The IP addresses for the Ethernet and wireless sides are different 192 168 0 34 192 168 0 72 E ell 169 254 102 17 LAN B Access Point Client Bridge Router 192 168 0 34 LAN A In the above example the wireless link is part of LAN A with the Client unit acting as a Router between LAN A and LAN B Alternately the Access Point could be configured as a Router the wireless link is then part of LAN B 169 254 102 54 169 254 102 53 lol 169 254 102 17 f E A LAN B Access Point Client Router Bridge 192 168 0 34 LAN A If more than two routers are required within the same radio network then routing rules may need to be configured refer section 3 11 Routing Rules for further details There is no limit to the number of Bridges in the same network although there is a limit of
70. ext lowest data rate and enter probation If subsequent transmissions are successful at the lower rate the 240U E will attempt to increase to the next highest rate when probation has ended This can occur when either a specified number of data frames have been successfully transmitted at the lower rate or when a specified amount of time has elapsed whilst using the lower rate The 240U E also has a configurable Basic Rate The difference between the Basic Rate and the radio Data Rate is that it only applies to multicast radio transmissions and management frames The Basic Rate is generally set to a lower value than the Data Rate since multicast transmissions have no inherent error correction mechanism Select the Radio Menu to change the following configuration parameters If a change is made you need to select Save Changes to retain the changes Changes will not take effect until the unit is reset Page 31 240U E Wireless Ethernet Power Level The RF power level is shown in this field This value is read only and cannot be altered Data Rate The radio baud rate in Mega million bits per second Mbps for point to point radio transmissions The default value is Auto Basic Rate The radio baud rate in Mega million bits per second Mbps for multicast messages and management frames These frames include beacons authentication association etc The default value is 2Mbps Channel Radio Channels 1
71. f 240U E s must have at least one Access Point acting as a master to one or more Clients All 240U E s to be configured as part of the same wireless network should be given the same System Address SSID and Radio Encryption settings For further information and examples on wireless network topologies refer section 1 1 above The 240U E supports several different radio encryption schemes WEP Wired Equivalent Privacy encryption is the weakest encryption method defined by the original IEEE802 11 standard 64bit and 128bit WEP combine either a 40bit or 104bit key with a 24bit initialization vector and are intended to provide equivalent security attributes to those of a wired medium The 240U E supports both 64bit and 128bit WEP without any performance throughput degradation WPA WiFi Protected Access is a subset of the IEEE802 111 Security Enhancements specification The 240U E supports WPA 1 TKIP and WPA 2 AES using a Pre Shared Key PSK TKIP Temporal Key Integrity Protocol enhances WEP by using 128bit encryption plus separate 64bit Tx and Rx MIC Message Integrity Check keys Enabling TKIP will degrade the 240U E radio throughput by approximately half of the rate attainable using either WEP or no encryption AES Advanced Encryption Standard the most secure encryption method is also based on 128 bit encryption key Enabling AES in the 240U E will degrade radio throughput to approximately 20 of the rate attainable using either WEP or no
72. f the destination network WDS router interfaces cannot provide the redundancy of bridge interfaces but can be used to reduce radio bandwidth requirements because the router can determine the destination based on IP address whereas the bridge must go through a learning phase where all broadcast traffic must be retransmitted on each interface Routed networks may also be used in some cases to avoid the overhead introduced by the bridge Spanning Tree Protocol when network loops exist Each WDS interface may also be configured with a different encryption algorithm however each side of a WDS link must specify the same encryption algorithm and keys When configuring a mesh man_240E_v1 13 doc Chapter Three Operation i e auto connect network with encryption the same encryption algorithm and keys must be inherited from the default interface Note that when WPA is required with a mesh network the same SSID must be used for each Access Point Alternatively the list of possible allowed Access Points by SSID and their corresponding passphrases must be specified since WPA Pre Shared Keys are derived from both passphrase and SSID WEP encryption can only be used for a WDS link when WEP has also been enabled for the default wireless interface the default WEP key will also be inherited One of the most common uses for WDS is to extend the range of the wireless network using repeaters The diagram below illustrates a simple example where the three A
73. ferring the wireless data Client Access Point 2 Brid Bridge 5 ridge d El ON 6 S Access Point Bridge Client Bridge The Spanning Tree Protocol implemented is IEEE 802 1d compatible The algorithm forms a loop free network by blocking traffic between redundant links in the network These blocked links are placed in a standby condition and may be automatically enabled to repair the network 1f another link is lost The Spanning Tree Algorithm maintains a single path between all nodes in a network by forming a tree like structure The Bridge Priority determines where the node sits in the tree A Bridge configured with the lowest priority 0 will become the root node in the network and will direct traffic between each of its branches The root node is typically the unit that handles the majority of traffic in the network The 240U E is configured with a Bridge Priority of 32768 by default The intention is to reduce traffic that the 240U E must handle by placing it at the branch level in the network tree As a branch the 240U E needs only pass traffic to devices that are its leaves When the bridge is turned on it needs to determine who the root bridge is and compute the port roles root designated or blocked To ensure that each bridge has enough information the bridges use special data frames called Bridge Protocol Data Units BPDUs to exchange information about bridge IDs and root path costs etc
74. for all 240U E units in the same system One of the four keys may be selected as the default key and is used to encrypt transmitted messages from the configured unit A 240U E can receive and decrypt a message from a module that has a different default key index as long as each module has the same key configured at the same index WEP keys must be entered as pairs of hexadecimal digits separated by colons Hexadecimal digits are in the range 0 9 and A F 64bit WEP requires 10 Hexadecimal digits and 128bit WEP requires 26 Hexadecimal digits For example 12 AB EF 00 56 for 64bit encryption and 12 AB EF 00 56 15 6B E4 30 C8 05 F0 8D for 128bit encryption Encryption keys must not be all zeros i e 00 00 00 00 00 Passphrase When WPA Encryption is selected 128bit Encryption keys are internally generated based on the Passphrase and System Address SSID The Passphrase must be between 8 and 63 characters in length and the Passphrase must be the same for all 240U E units in the same system Save and Reboot Save settings to non volatile memory and reboot 240U E 3 6 Ethernet Data All Ethernet devices are uniquely identified by a MAC Address that identifies the hardware device These addresses are factory set and are six bytes in size and are expressed in hexadecimal in the form XX XX XX XX XX XX Ethernet messages can be addressed to a single device a point to point message or can be directed towards multip
75. fy location of firmware bootloader file epm_mrb_elpro_E24G_x x bin gz and firmware application file epm E24G x x bin gz using the Browse buttons in the FlashUpdate program 9 Connect PC to module RS 232 serial port with straight though serial cable 10 Select COM port connected to module in the FlashUpdate program 11 Select Server Interface in the FlashUpdate program IP address of PC connected to which can be found from step 4 above Flash Update x mi 5 Port comi El Bootloader File epm_mrb_elpro_E24q_1 1 Browse Remove Upgrade Upgrade Server O Application File epm_E24G_v1 13 bin gz Browse Remove Refresh Interfaces Y 192 168 943 Note Computer and module MUST have same Subnet Mask ususally 255 255 255 0 Page 83 240U E Wireless Ethernet 12 Click on Upgrade button in FlashUpdate program 13 Follow instructions from confirmation window Confirm X gt Ensure SETUP switch is ON and RS232 and Ethernet cables are connected to module Cycle power to module within 30 seconds after selecting OK to this message 14 Click OK Power down module wait approximately 1 second and power up module This entire step must be accomplished within 30 seconds of completing the previous step 15 Programming will commence Flash Update Xx Com Port E 1 y om Bootloader File epm mb elpro E24g 1 1 Browse Remove Server Interface 192 168 0 200 Application File e
76. g Rules Add Entry Delete Entry Name Destination Gateway Subnet DH Muk 192 168 0 0 169 254 0 2 255 255 255 0 2 Route to Unit C 192 168 6 0 169 254 5 4 255 255 255 0 1 Route to Unit A The routing rules for unit B are shown above The routing rule for directing traffic to unit A can be seen to specify 192 168 0 0 as the destination address the network address of unit A because the last byte is zero this refers to a route to the network 192 168 0 x as opposed to a route to an individual host The same rule specifies the address 169 254 0 2 as the gateway address this is the WDS Router IP address that unit A has been configured with for its WDS link to unit B So this routing rule effectively tells the 240U E that any traffic destined for the network 192 168 0 x should be forwarded to unit A via the WDS link Units A and C would also require similar pairs of routing rules to direct traffic to the network addresses at the end points of their respective WDS links For unit D it would suffice to simply configure unit B as its default gateway as unit B would then forward on any traffic destined for units A and C Refer to section 3 11 Routing Rules for further information on routing rules WDS Configuration The WDS Configuration page as seen above is accessible from the Repeaters link on any of the configuration web pages The configurable WDS parameters are summarized below When WDS communication
77. ge distances The distance which may be reliably achieved will vary with each application depending on the type and location of antennas the degree of radio interference and obstructions such as buildings or trees to the radio path The maximum range achievable depends on the regulated RF power permitted in your country and whether you use separate transmit and receive antennas With a single antenna 5 km 3 miles can be achieved in USA Canada and Australia 4W ERP and 1km in Europe 100mW ERP With separate transmit and receive antennas more than 10km 6 miles can be achieved in USA Canada and Australia and more than 5 km in Europe To achieve the maximum transmission distance the antennas should be raised above intermediate obstructions so the radio path is true line of sight The modules will operate reliably with some obstruction of the radio path although the reliable distance will be reduced Obstructions which are close to either antenna will have more of a blocking affect than obstructions in the middle of the radio path The 240U E modules provide a diagnostic feature which displays the radio signal strength of transmissions refer Diagnostics section Page 11 240U E Wireless Ethernet Line of sight paths are only necessary to obtain the maximum range Obstructions will reduce the range however may not prevent a reliable path A larger amount of obstruction can be tolerated for shorter distances For short di
78. he 240U E can be unnecessarily overburdened Filtering may be used to reduce broadcast traffic sent over the radio Refer Section 3 12 for how to configure a filter By default a transparent bridge does not handle loops within the network There must be a single path to each device on the network Loops in the network will cause the same data to be continually passed around that loop Redundant wireless links may be set up by enabling the bridge Spanning Tree Protocol see section 3 9 Spanning Tree Protocol for more details 3 or 4 Address Mode There are two different operating modes that affect bridge operation for a 240U E client station 3 Address Mode or 4 Address Mode 3 address mode must be used by 240U E clients when they have to communicate with third party non 240U Access Points If communicating with Elpro 245U E Ethernet modems then the 240U E s need to be configured with WDS 4 address mode not the default 3 address mode unless the 240U E is a client However 4 address mode which is also used for multiple Access Point Repeaters may be used by 240U E clients when they communicate with other 240U E Access Points Address mode configuration can be altered via the Repeaters configuration page When 3 address mode is used it is not possible for a 240U E client to transmit over the radio link the MAC address of any device connected to its wired Ethernet port Therefore the 24
79. ia ACMA Channels 10 and 11 are approved for use in Spain and France Refer to the relevant regulatory authority for the region as to which radio channels are approved for use Page 21 240U E Wireless Ethernet 3 3 Default Configuration The default factory configuration of the 240U E is e Client Bridge e IP address192 168 0 1XX where XX is the last two digits of the serial number the default IP address is shown on the printed label on the back of the module e netmask 255 255 255 0 e Username is user and the default password is user The 240U E will temporarily load some factory default settings if powered up with the Factory Default switch on the end plate of the module in SETUP position When in SETUP mode wireless operation is disabled The previous configuration remains stored in non volatile memory and will only change if a configuration parameter is modified and the change saved Do not forget to set the switch back to the RUN position and cycle power at the conclusion of configuration for resumption of normal operation 3 4 Configuring the Unit for the First Time The 240U E has a built in web server containing WebPages for analysis and modification of configuration The configuration can be accessed using Microsoft Internet Explorer This program is shipped with Microsoft Windows or may be obtained freely via the Microsoft website Configuration of IP address gateway
80. ic on the wired Ethernet a better idea of regular traffic can be discovered Network Analysis programs make configuration of a filter for the 240U E a simple task man_240E_v1 13 doc Chapter Four Diagnostics 4 3 Testing Radio Paths The general procedure for radio range testing a link is fairly simple Configure two units to form a link using automatic radio rates Install the Access Point at a fixed location Take a laptop computer and the Client to each of the remote locations and analyse the link using the Connectivity webpage If a beacon is heard from the Access Point the Client will update its Connectivity webpage with the received signal strength of beacon messages from the Access Point If the signal is strong enough a link may be established and the Connectivity webpage of the Access Point may be opened If the link is weak the LINK led will go out and the remote Connectivity webpage of the Access Point will fail to load Using this procedure the signal strengths of units at both locations may be analysed and traffic is sent between the units whilst remote WebPages are opened 4 4 Utilities 4 4 1 PING Ping is a basic Internet program that lets you verify that a particular IP address exists and can accept requests Ping is used diagnostically to ensure that a host computer you are trying to reach is actually operating If for example a user can t ping a host then the user will be unable to send files to that host P
81. ically establish WDS links with other Access Points even if those Access Points are not present in the list NOTE requires that Access Points that are not in the list do not have SSID broadcast disabled otherwise the SSID is assumed to be the same as this Access Point Auto connect interfaces will always be bridged with the default wireless interface Only connect to AP s in list Only attempt to establish WDS links with Access Points identified in the list Maximum WDS connections to this device Each 240U E Access Point supports a maximum of 6 WDS links direct to other Access Points However the maximum may be reduced this can be useful when Auto Connect is used AP to AP The signal needs to be better than the configured threshold for a connection Connection to be established This will limit connections to APs with marginal signal Threshold levels and stop the BPDU relearning process occurring every time the link drops AP to AP If the receive signal level drops below the threshold after a connection has been Disconnection established the link will be disconnected Threshold Disconnection Threshold should be less than or equal to the Connections Threshold Page 41 240U E Wireless Ethernet WDS Connections SSID Specify the SSID of the Access Point s to establish a WDS link with Leave this field blank if you wish to nominate the Access Point by MAC addr
82. in selecting these IP addresses Page 47 240U E Wireless Ethernet If you wish to use routing over this serial network connection then the IP addresses selected must not lie on Wireless or Wired Ethernet networks already configured into the device You must ensure they set routing rules appropriately for devices either side of the network If you want the serial device visible as present on the Wireless or Wired network then the local IP address must be the same as the IP address set for the desired port A process called Proxy ARP is used to make the device visible on the network In this process the 240U E pretends that it holds the IP address on the network and responds on behalf of the remote device The result of this is similar to bridging for a single device with some exceptions One of these exceptions is the inability to handle name server searches of the network via this serial link For example you would encounter difficulty if you were to use Windows Explorer over the serial link to find a PC on the wired network For this to operate correctly you must explicitly map computer names to IP addresses in the LMHOSTS file on your PC When in SETUP mode the 240U E PPP server is enabled This may also be used to configure the module Settings whilst in SETUP mode are as follows e username user password is user e Serial baud rate 38400bps e Hardware flow control e Local address 192 168 123 123 e Remote addre
83. indicates a matching SSID Access Points do not initiate link establishment Client Start up When a Client powers up it scans for beacons from Access Points While a link is not established the Client cyclically scans all available channels for a suitable Access Point The Client will attempt to establish a link with an Access Point only if it has matching SSID and other compatible capabilities as indicated by the beacon If more than one suitable Access Point is discovered the client will attempt to establish a link with the Access Point that has the strongest radio signal Link Establishment Once a Client identifies a suitable Access Point for link establishment it attempts to establish a link using a two step process Authentication and Association During Authentication the Client and Access Point check if their configurations permit them to establish a link Once the Client has been authenticated it will then request an Association to establish a link Status of the wireless link is indicated via the Link LED For an Access Point the Link LED will be OFF while no links have been established Once one or more links have been established the Link LED is ON For a Client the Link LED will reflect the connection status to an Access Point Link status is also displayed on the Connectivity page of the web interface After the link is established data may be transferred in both directions The Access Point will act
84. indoor applications Italy If used outside of own premises general authorization is required This implies a license to use the band is required from local radio spectrum authorities Russian Federation Only for indoor applications Page 91 240U E Wireless Ethernet User Manual FCC Statutory Requirement Unlicensed operation limits the radio power High gain aerials may only be used to compensate for cable losses 115 mm 4 5 67 5mm 3 25 50 mm 1 9 141 mm 5 55 160 mm 6 3 240U E WIRELESS ETHERNET 32 mm 1 3 36 mm 1 42 DIO AUN O ocoodo o 0 0 0 0 e ETHERNET RS232 B A COM Dee O RS 485 SUPPLY WARNING EXPLOSION HAZARD DO NOT DISCONNECT CIRCUITS WHILE LIVE UNLESS AREA IS A KNOWN TO BE NON HAZARDOUS iri Installation Guide VO Wiring SIZE FSCM NO DWG NO REV E L B R O DRAWN S PILCHER A3 VisioDocument 11 Technologies ISSUED 9 10 2009 SCALE 11 SHEET 10F2 man 240E vl 13 doc Module Dimensions Page
85. ing operates by sending a packet to a designated address and waiting for a response The basic operation of Ping can be performed by following these steps in any Windows operating system Click on the Start Menu and select Run Type in cmd and enter you should then see the command screen come up There will be a certain directory specified unique to your own PC with a flashing cursor at the end At the cursor type the word ping leaving a space and the default IP address for the 240U E at first startup This command would be written as Ping 192 168 123 123 then Enter to send the ping command The PC will reply with an acknowledgement of your command and if your 240U E is correctly configured your reply will look something like this Page 73 240U E Wireless Ethernet Microsoft Windows xP Version 5 1 2666 lt C Copyright 1985 2001 Microsoft Corp C Documents and Settings Support gt cd C Documents and Settings gt cd C gt ping 192 168 123 123 Pinging 192 168 123 123 with 32 bytes of data Reply from Reply from Reply from Reply from Ping statistics Packets C gt The screen shot below shows the response of the ping 192 168 123 123 t command 192 168 123 123 192 168 123 123 192 168 123 123 192 168 123 123 for Sent Gms Maximum C gt ping t 192 168 123 123 Pinging 192 168 123 123 with 32 bytes of data from from from from from from from from from from from
86. initiate the connection so they must be acting as TCP IP clients Once a connection has been established the 240U E can keep it open using keep alive messages which are configured at specific pre configured time intervals In order to route data between connected devices efficiently the 240U E would need to have detailed knowledge of the protocol comprising that data Alternatively if the protocol is not known by the module then any data frame arriving from a given device can simply be forwarded to all other devices i e broadcast The 240U E Routing Server supports Modbus RTU routing mode a generic master slave protocol mode and a broadcast mode The example below illustrates the type of topology that would typically be used in conjunction with the 240U E that is an existing WiFi network using 240U E modems to connect remote devices man_240E_v1 13 doc Chapter Three Operation back into a corporate LAN At the same time a server located on the LAN uses port forwarding to forward TCP IP data arriving from remote GPRS modems to the 240U E In this case the fixed IP address of the 240U E is used by the server for port forwarding whereas the remote GPRS modems connect to the server using a domain name and TCP port number Elpro 605 GPRS Rs232 Modem Device el l 240U E Internet s _ GPRS Connections A Router ES Other e GPRS Nx RS232 NL Modem Device 7 B 240U E Modem i 4 Device A
87. is for Windows XP earlier Windows operating systems have similar settings e Open Properties of Local Area Connection e Select Internet Protocol TCP IP and click on Properties Operation Network Connections File Edit view Favorites Tools Advanced Help Q Back S P Search Key Folders Address Network Connections LAN or High Speed 1 Network Tasks 8 Local rea Create a new connection Set up a home or small office network Change Windows Firewall settings Disable this network device a Repair this connection Connection m Rename this connection View status of this connection Change settings of this connection View or change settings for this connection Local Area Connection Properties Authentication Advanced Connect using EM SURECOM EP 320 R 100 10M PCI This connection uses the following items Client for Microsoft Networks a File and Printer Sharing for Microsoft Networks 5 005 Packet Scheduler Internet Protocol TCP IP Install Uninstall Properties Description E Transmission Control Protocol Internet Protocol The default wide area network protocol that provides communication across diverse interconnected networks C Show icon in notification area when connected Notify me when this connection has limited or no connectivity Page 23 240U E Wireless Ethernet
88. ish a connection to 240U E Page 51 240U E Wireless Ethernet 17 Ensure both the username and the password are entered exactly as configured in 240U E When booted in SETUP mode the PPP server has username user and password user 3 13 2 Serial Gateway Serial Gateway functionality is available for both RS 232 and RS 485 ports independently and enables serial data to be routed via the wired or wireless network connection Serial Gateway functionality is similar to radio modem functionality allowing point to point and multipoint serial data transfer Each 240U E serial port may be configured as Server Client or Multicast Group When configured as Server the module will wait for a connection to be initiated by a remote client When configured as Client the module will automatically attempt to connect to the specified remote server When configured as Multicast Group the module will broadcast data to all members of the same Multicast Group Some of the possible Serial Gateway topologies are illustrated below As can be seen it is possible for serial data from a 240U E to be transferred to one or more 240U E serial ports or to be encapsulated within a TCP IP socket for availability on an Ethernet network Conversely data encapsulated in a TCP IP socket can be reproduced at a 240U E serial port Both 240U E serial ports and the hard wired Ethernet port can be in use at the same time Access Access Client Point P
89. ision Crossover cable A special cable used for networking two computers without the use of a hub Crossover cables may also be required for connecting a cable or DSL modem to a wireless gateway or access point Instead of the signals transferring in parallel paths from one set of plugs to another the signals crossover If an eight wire cable was being used for instance the signal would start on pin one at one end of the cable and end up on pin eight at the other end They cross over from one side to the other CSMA CA CSMA CA is a listen before talk method of minimizing but not eliminating collisions caused by simultaneous transmission by multiple radios IEEE 802 11 states collision avoidance method rather than collision detection must be used because the standard employs half duplex radios radios capable of transmission or reception but not both simultaneously Unlike conventional wired Ethernet nodes a WLAN station cannot detect a collision while transmitting If a collision occurs the transmitting station will not receive an ACKnowledge packet from the intended receive station For this reason ACK packets have a higher priority than all other network traffic After completion of a data transmission the receive station will begin transmission of the ACK packet before any other node can begin transmitting a new data packet All other stations must wait a longer pseudo randomized period of time before transmitting If
90. ists are whitelists traffic must have matching detail in at least one of the whitelists for it to be passed Note that as this must agree with rule 1 above the traffic detail must not match anything in a blacklist if present for it to be passed When configuring a Whitelist it is important to add the Addresses of all devices connected to the 240U E wired Ethernet port that communicate over the wireless link It is particularly important to add the Address of the configuration PC to the Whitelist Failure to add this address will prevent the configuration PC from making any further changes to configuration Design of the filter may be simplified by monitoring network traffic and forming a profile of traffic on the wired network Network Analysis software such as the freely available Ethereal program will list broadcast traffic sent on the network For example Computer B sees the computer D via Ethernet Modems C amp E The White Filtering requires that at Modem C has computer B in its white list Modem E has computer D in its Whitelist Computer A will be not be able to access Computer D as Computer A is not present in the Whitelist in Modem C 192 168 0 34 192 168 0 72 I N Client e Bridge LAN 192 168 0 72 Access Point Bridge A B C D E Page 45 240U E Wireless Ethernet If radio links are chained together to form a radio backbone it is also important to consider the operation of the Layer 3 Transparent Bridge Refer
91. le destinations by using Multicast addresses and Broadcast addresses The broadcast address is used to send data to all devices The broadcast address is FF FF FF FEF FF FF Multicast addresses are used to direct data at a set of devices Multicast addresses may be recognized as they are always have the least significant bit of the first byte of the MAC Address set For example 01 00 5E 00 00 00 is a multicast address 01 80 C2 00 00 00 is also a multicast address Page 29 240U E Wireless Ethernet 3 7 Normal Operation After addresses are configured the units are ready for operation Refer to section 1 for an explanation on the operation of a Bridge and Router Transparent Bridge Operation Bridges are typically used to connect sections of the same IP network together By default the 240U E is configured as a transparent bridge When a transparent bridge is started it learns the location of other devices by monitoring the source address of all incoming traffic Initially it forwards all traffic between the wired Ethernet port and the wireless port however by keeping a list of devices heard on each port the transparent bridge can decide which traffic must be forwarded between ports it will only transfer a message from the wired port to the wireless port if it is required A bridge will forward all Broadcast traffic between the wired and wireless ports If the wired network is busy with broadcast traffic the radio network on t
92. lifetime is limited to the availability of electronic components If the serviceable life is reached in less than three years following the original purchase from ELPRO ELPRO will replace the product with an equivalent product if an equivalent product is available This warranty does not extend to Failures caused by the operation of the equipment outside the particular product s specification or Use of the module not in accordance with this User Manual or Abuse misuse neglect or damage by external causes or Repairs alterations or modifications undertaken other than by an authorized Service Agent ELPRO s liability under this warranty is limited to the replacement or repair of the product This warranty is in lieu of and exclusive of all other warranties This warranty does not indemnify the purchaser of products for any consequential claim for damages or loss of operations or profits and ELPRO is not liable for any consequential damages or loss of operations or profits resulting from the use of these products ELPRO is not liable for damages losses costs injury or harm incurred as a consequence of any representations warranties or conditions made by ELPRO or its representatives or by any other party except as expressed solely in this document Hazardous Location Notices This equipment is suitable for use in Class I Division 2 Groups A B C D Temperature Code T5 Ta 40 Cto 60 C or non hazardous locations only
93. med using this page Firmware upgrades may be made using the radio network Note that the unit must be reset before the new firmware is run DO NOT DISCONNECT POWER UNTIL FIRMWARE UPGRADE IS COMPLETE lf programming fails a manual firmware upgrade may have to be performed locally to restore normal operation Upgrade will take approximately 1 minute if connected directly via wired ethernet It may take longer if programmed remotely using the radio network depending on the current radio baud rate Performing an upgrade via a poor radio path is not recommended Select file Browse Save to Flash and Reset Save to Flash Cancel _ internet 5 There are two options a The Save to Flash and Reset button may be clicked to initiate a reset immediately after a successful firmware upgrade so that the new firmware is run b Alternatively Click Save to Flash button to just program the new firmware to the unit A reset is necessary to run the new firmware This is useful for maintaining radio link whilst performing upgrades to remote units 6 The following dialog box may be displayed as a warning Click OK to proceed Microsoft Internet Explorer D If programming fails a manual firmware upgrade may have to be performed locally to restore normal operation Are you sure you want to proceed 7 Firmware upgrade will proceed and should take about 1 minute if performed locally If performed ove
94. n Section 3 Page 77 240U E Wireless Ethernet Chapter Five General EMC specification Radio specification Housing Terminal blocks LED indication Operating Temperature Power Supply Nominal supply Average current drain Current drain when transmitting Ethernet Port Standard Radio Transceiver Transmit power Channels Receiver sensitivity Antenna Connector Wireless data rate configurable EN 300 683 EN 300 328 114 x 140 x 30mm 4 5x 5 5 x 1 2 inch Removable Active Serial RX and TX Radio RX and TX Link 35 to 60 degrees C 30 to 140 degrees F 9 to 30VDC 240 mA 12V 440 mA 12V 10 100 BaseT IEEE 802 3 compliant Different models available 11 x 5MHz lt 8 FER Female SMA coaxial 1 to 11Mb s SPECIFICATIONS FCC Part 90 FCC Part 15 247 RSS 210 Powder coated extruded aluminum DIN rail mount Suitable for 12 gauge 2 5sqmm conductors O 99 RH non condensing Overvoltage and reverse voltage protected 150mA 24VDC 280mA 24VDC RJ45 Bridge router Access point client functionality 100mW 20dBm or 300mW 25dBm First channel centre at 2 412 GHz 96dBm O 1Mb s 91dBm E 11Mb s Two connectors for signal diversity Auto function determines fastest rate within user configured fade margin man_240E_v1 13 doc Chapter Five Serial Ports RS232 Port RS485 Port Data rate bit sec configurable Syst
95. nary twisted pair copper POTS Plain Old Telephone Service telephone wires Encryption key An alphanumeric letters and or numbers series that enables data to be encrypted and then decrypted so it can be safely shared among members of a network WEP uses an encryption key that automatically encrypts outgoing wireless data On the receiving side the same encryption key enables the computer to automatically decrypt the information so it can be read Firewall Keeps unauthorized users out of a private network Everything entering or leaving a system s internal network passes through the firewall and must meet the system s security standards in order to be transmitted Often used to keep unauthorized people from using systems connected to the Internet Hub A multiport device used to connect PCs to a network via Ethernet cabling or via WiFi Wired hubs can have numerous ports and can transmit data at speeds ranging from 10 Mbps to multigigabyte speeds per second A hub transmits packets it receives to all the connected ports A small wired hub may only connect 4 computers a large hub can connect 48 or more Hz The international unit for measuring frequency equivalent to the older unit of cycles per second One megahertz MHz is one million hertz One gigahertz GHz is one billion hertz The standard US electrical power frequency is 60 Hz the AM broadcast radio frequency band is 535 1605 kHz the FM broadcast radio freque
96. ncy band is 88 108 MHz and wireless 802 11b LANs operate at 2 4 GHz TEEE Institute of Electrical and Electronics Engineers New York www ieee org A membership organization that includes engineers scientists and students in electronics and allied fields It has more than 300 000 members and is involved with setting standards for computers and communications man_240E_y1 13 doc Appendix B Glossary Infrastructure mode A client setting providing connectivity to an AP As compared to Ad Hoc mode whereby PCs communicate directly with each other clients set in Infrastructure Mode all pass data through a central AP The AP not only mediates wireless network traffic in the immediate neighborhood but also provides communication with the wired network See Ad Hoc and AP VO The term used to describe any operation program or device that transfers data to or from a computer Internet appliance A computer that is intended primarily for Internet access is simple to set up and usually does not support installation of third party software These computers generally offer customized web browsing touch screen navigation e mail services entertainment and personal information management applications IP A set of rules used to send and receive messages at the Internet address level IP Internet Protocol telephony Technology that supports voice data and video transmission via IP based LAN
97. ndant paths and therefore the possibility for loops to occur so that the bridge Spanning Tree Protocol should be enabled To illustrate the redundancy consider that if A needs to send data to D it has redundant paths through both B and C However due to the spanning tree protocol only one of B or C will relay the data with the other taking over in the event of a failure Access Point 192 168 0 3 o EA gt By ga Access Point fem a Access Point No 4 192 168 0 2 __ 7 192 168 0 5 y e E ___ 0 am B E a as ee je A SS 7 im Y 2 D NL My c n e ic Fa Ledo Access Point 192 168 0 4 The configuration for unit A is shown below this page is accessible via the Repeaters link from the configuration web pages It can be seen that WDS mode and Bridge Spanning Tree Protocol are enabled and Auto Connect to WDS enabled AP s is selected Note that auto connect mode requires that none of the Access Points disable their SSID broadcast otherwise they must have the same SSID If this is not the case the connections must be manually entered into the WDS connection list described later Inherit default encryption has also been selected thus allowing us to inherit the same encryption mode used for the default wireless interface i e the interface used to communicate with clients If WPA encryption is inherited then all Access Points must have the same SSID otherwise the list of
98. nectors used in Ethernet networks Even though they look very similar to standard RJ 11 telephone connectors RJ 45 connectors can have up to eight wires whereas telephone connectors have only four Server A computer that provides its resources to other computers and devices on a man_240E_y1 13 doc Appendix B Glossary network These include print servers Internet servers and data servers A server can also be combined with a hub or router Site survey The process whereby a wireless network installer inspects a location prior to putting in a wireless network Site surveys are used to identify the radio and client use properties of a facility so that access points can be optimally placed SSL Commonly used encryption scheme used by many online retail and banking sites to protect the financial integrity of transactions When an SSL session begins the server sends its public key to the browser The browser then sends a randomly generated secret key back to the server in order to have a secret key exchange for that session Subnetwork or Subnet Found in larger networks these smaller networks are used to simplify addressing between numerous computers Subnets connect to the central network through a router hub or gateway Each individual wireless LAN will probably use the same subnet for all the local computers it talks to Switch A type of hub that efficiently controls the way multiple devices use the
99. net a an Access Point or a Client and Device ri El a a Bridge or a Router La E nd Pi a Client oin You can also connect to the 240U E via a RS232 or RS485 serial port using serial server or PPP point to point protocol PPP allows the 240U E to connect serial communications into the Ethernet network Page 7 240U E Wireless Ethernet Access Point vs Client The Access Point unit acts as the wireless master unit The Access Point sets up the wireless links to the Client units and controls the wireless communications The first diagram shows two Ethernet devices being linked One 240U E is configured as an Access Point and one as a Client in this example it doesn t mater which unit is the Access Point The second diagram shows an existing LAN being extended using 240U E s In this example the Access Point should be configured at the LAN end although the wireless link will still work if the Client is at the LAN end An Access Point can connect to multiple Clients In this case the Access Point should be the central unit An Access Point could be used as a Repeater unit to connect two 240U E Clients which do not LAN have direct reliable Client radio paths x g LAN ER Access Client y Point Ethernet Device fe f Ze Client LAN Ethernet Device Access Point E Client Multiple Access Points can be s
100. nnnnnnnnns 22 3 4 2 Set 240U E to same network as PC oococccccnnonononanononccnnannnononononocnoncnnanonononocnononnnnns 25 3 5 NETWORK CONFIGURATION sust ta idad 27 3 6 ETHERNET DATA ul 29 3 7 NORMAL OPERATION Sa ld 30 3 8 RADIO CONFIGURATIONS siii ae a a QU iaaa ia ai ga 31 3 9 SPANNING TREE ALGORITHM REDUNDANCY ccsssssceeessseceeecessaececsesaeeecsesseaeeeenenaes 33 3 10 MULTIPLE AP REPEATER MESH NETWORK cccsssssscecesssececsssesceceesesaeeecseaeeeessseeeess 34 WDS CO to ts ed a 40 WDS Connections anda dba 42 3AL ROUTING RULES O AE A AAA 43 3 12 WIRELESS MESSAGE FILTERING cios 45 Sul SERIAL PORT CONFIGURATION static 47 SAS y GRS 23 2 PPP Servers st o Li ee ese a 47 3 13 27 Serial Gateway cian iii sad and 52 la Modbus TCP to TUAW ada 54 3 14 DIGITAL INPUT OUTPUT roroesan iii ieee 55 3 15 MODBUS VO TRANSFER tati a aa 55 6 SOCR T RODIN A Mia 60 3 17 MODULE INFORMATION CONFIGURATION csssccceesssseceesssececssssececeeseeaeeecesaeeeensseeeees 65 Page 5 240U E Wireless Ethernet 3 18 REMOTE CONFIGURATION ccccccccccccccccsssssescccccsscesssssescecccssseusssescceccsssuueuseesesscssesuaenens 65 3 19 CONFIGURATION EXAMPLES ccccccccccccssesssceccccccccsssssscscecccssssseusesccecsssssuessuscecesessuuenees 66 CHAPTER FOUR DIAGNOSTICS Q u uu ccccccsssssssssssssssesssssssssssssssesssesssssssssssesesesesess 69 4 1 DIAGNOSTICS CHART td ED EE AE a do dees Weeds DES odes 69 4 2 DIAGNOS
101. of 25 different Modbus TCP Servers Modbus TCP Server Slave enables the 240U E to accept connections from one or more Modbus TCP Clients Masters All Modbus transactions routed to the onboard Modbus TCP Server are directed either to from the onboard general purpose I O registers The Modbus TCP Server is shared with the Modbus TCP to RTU Gateway so that the Modbus Device ID is used to determine if a Modbus transaction is to be routed to the onboard Modbus TCP Server or to a Modbus RTU device connected to the serial port Care should therefore be taken that all serially connected Modbus devices use a different Modbus Device ID i e Modbus Slave Address to the onboard Modbus TCP Server Up to 32 separate connections to the Modbus TCP Server are supported Modbus RTU serial Master functionality is achieved by combining the Modbus TCP Client Master and Modbus TCP to RTU Gateway Simply specify a Modbus TCP Client Master connection to a Modbus TCP Server where the server is the address of any 240U E with Modbus TCP to RTU Gateway enabled Care should be taken to ensure that the Device ID i e Modbus Address of the serial device is different to the Device ID of the onboard Modbus TCP Server of the 240U E that the serial device is connected to The 240U E provides a configurable option to automatically reset the value of the onboard I O registers to zero in the event of a communications failure If a valid Modbus transaction directed to fr
102. oint Client RS232 Spurs a RS485 RS232 0 Up estic RS232 Device ri Device Device gt Device q ul z E gt E RS232 RS485 RS232 RS232 Server Client Client Server Client j A ee Client per A SA RS232 Device q Access ejl RS232 Server PC Running Telnet or SeriallP Access Point RS485 i Device Client Client o IE Suge RS232 RS485 ee Ms eae a Device Device E E g q RS485 Multicast Group 7 y RS485 Multicast RS232 Multicast Group Group man_240E_v1 13 doc Chapter Three Operation There are software packages available i e SerialIP Redirector by Tactical Software that can create a virtual serial port on a PC This virtual serial port can be configured to connect to a 240U E serial port Standard programs can then be used to access this serial port as if it were actually connected to the PC Alternatively the program telnet may be used to connect to a serial port on the 240U E The telnet command used should be TELNET IP address Listen Port eg TELNET 192 168 0 155 23 where the IP address is 192 168 0 155 and Listen Port is 23 Enable RS 232 PPP Server Check this box to enable the PPP network server on the RS 232 port Enable RS 485 Serial Gateway Check this box to enable the Serial Gateway Server on the RS 485 port Data Rate The serial data rate desired Serial data rates available range from 110bps to a maximum of 115 200bps Data Bits Parity Stop Bits The data format
103. om a given register has not been completed for longer than a configurable timeout then the value of that register will be reset to zero An example of the Modbus functionality of the 240U E is illustrated below In this example the status of the onboard digital input at C will be reflected at the onboard digital output at B Also 8 VO registers from Modbus serial device D will be transferred to A man_240E_v1 13 doc Chapter Three Operation 192 168 0 200 192 168 0 196 Modbus TCP Modbus TCP Server Client Device ID 1 Modbus Modbus RTU Slave yu RTU Slave Device ID 5 N Device ID 6 D The Modbus configuration for unit C is shown below Unit C is configured with Modbus TCP Server enabled and Device ID 1 so that the Modbus TCP Client at B can connect and read the status of the onboard digital input Unit C also has Modbus TCP to RTU Gateway enabled see section 3 13 3 Modbus TCP to RTU Gateway so that the Modbus TCP Client at B can communicate with the serial Modbus RTU device D 3 Digital Input Output Configuration Microsoft Internet Explorer File Edit View Favorites Tools Help Ar Q O x B TN JO search Se Favorites el w LJE 3 AAA Do Links gt Modbus TCP Configuration Enable Modbus TCP Server Slave M Modbus Server Device Id fi Enable Modbus TCP Client Master 7 Modbus Client Scan Rate msec lo Reset Registers on Comms Fail TF Cornms Fail Timeout sec lo Th
104. on Type What do you want to do C Connect to the Internet Connect to the Internet so you can browse the Web and read email Set up an advanced connection C Connect to the network at my workplace Connect to a business network using dial up or YPN so you can work from home a field office or another location Connect directly to another computer using your serial parallel or infrared port or 4 Connect dir ectly to another computer set up this computer so that other computers can connect to it New Connection Wizard Advanced Connection Options Which type of connection do you want to set up Select the connection type you want C Accept incoming connections Allow other computers to connect to this computer through the Internet a phone line or a direct cable connection lt Back Cancel Page 49 240U E Wireless Ethernet 5 Set PC as guest Host or Guest To connect two computers your computer must be identified as either a host or a guest Choose the role you want for this computer C Host This computer has the information you want to access This computer is used to access information on the host computer New Connection Wizard Connection Name What is the name of the other computer you are connecting to Type the name of the other computer in the following box Computer Name E E thernet Modem The name you type here will be the name of the connection you are
105. or in 108 bit also called 128 bit encryption modes As 108 bit encryption provides a longer algorithm that takes longer to decode it can provide better security than basic 40 bit 64 bit encryption Wi Fi Wireless Fidelity An interoperability certification for wireless local area network LAN products based on the Institute of Electrical and Electronics Engineers IEEE 802 11 standard man_240E_v1 13 doc Appendix D EU Compliance Appendix C European Compliance The ELPRO 240U E module can be used in the following countries listed below with no restrictions Austria Belgium Cyprus Czech Republic Denmark Estonia Finland Germany Greece Hungary Ireland Italy Latvia Lithuania Luxembourg Malta Netherlands Poland Portugal Slovakia Slovenia Spain Sweden United Kingdom Iceland Liechtenstein Norway Switzerland Bulgaria Romania Turkey The following countries have restrictions for use Luxembourg General authorization required for network and service supply This implies a license to use the band is required from local radio spectrum authorities Norway Does not apply for the geographical area within a radius of 20 km from the centre of Ny Alesund otherwise ok to use France Outdoor use limited to 10mW EIRP Full implementation planned for 2012 This can be implemented by the use of 10 dB attenuators between the module and antenna Russian Federation Only for
106. ound noise and radio data rate Use programs such as Ping to generate data packets to test the radio path 3 Connectivity Microsoft Internet Explorer File Edit View Favorites Tools Help O re X gt a Ph DD search Sie Favorites E A E wj LJ rel 3 Address l http 192 168 123 202 web rfpath asp ELPRO Technologies as Connectivity Current Channel 3 Frequency 2422MHz SSOCIATION RATE Ea on E STATION CLASS AUTHENTICATION ENCRYPTION a E i Mbps dBm dBm 00 12 4F 00 04 E6 STA Open System Unauthorized 1 11 56 119 0 Internet man_240E_v1 13 doc Chapter Four Diagnostics 4 2 2 Monitor Communications To monitor radio communications it is necessary to configure the Operating Mode under Network as MONITOR When in the MONITOR mode the Monitor Communications function displays a continuous list of transmissions that are being received As Beacon messages occur very frequently they have been filtered out from the Monitor Communications display for convenience Monitor communications lists the frame type of each transmission and various statistics of each transmission along with a timestamp Communications can only be monitored on one channel at a time the channel that is used for monitoring can be altered on the radio settings page File Edit view Favorites Tools Help Qu 90 10 Address Monitor Communications Microsoft Internet Explorer L 1
107. p 9 Pl File Edit View Favorites Tools Help py Socket Routing gt ED mh Lp Page gt Groots Routing Servers Configure a Routing Server to route data between two or more client devices If the data to be routed is a Master Slave Protocol such as Modbus then configure a Master and Slave Port Otherwise if the data to be routed is a peer to peer protocol then leave the Master Port blank and only configure a Slave Port If Modbus Mode is enabled the 240U E will learn the location of all modbus devices and route modbus traffic only to the required device Connection statistics for all configured Routing Servers are available on the Statistics page Add Entry Delete Entry Master Slave Max Modbus Max Inactivity Password Port Port Connections Mode Poll Timeout Fail 1 10 M 5 2 10 o 0 3 10 o 0 Notes Inactivity Timeout is in seconds enter a value of 0 for no timeout Password must be between 6 32 characters or blank to disable password The 240U E allows up to 10 Routing Servers to be configured The 240U E can support a total maximum of 50 connections for ALL Routing Servers Master and Slave Port numbers must be unique for all Routing Servers Connection status of all Routing Servers are also available in local Modbus Registers For further information consult the user manual Save Changes Save Changes and Reset Jus Max connections are set to 10 me
108. pm_E24G_v1 13 bin gz Browse Remove Refresh Interfaces RCT updated bflags RCT pdated bdelay O Note Computer and module MUST have same Subnet Mask ususally 255 255 255 0 16 If programming was successful a dialog box is displayed showing this Information X i Flash update Complete set SETUP switch to OFF position and cycle power for normal operation 17 Switch dipswitch to RUN position and cycle power for normal operation man_240E_v1 13 doc Appendix B Glossary Appendix B GLOSSARY ACK Acknowledgment Access point An access point is the connection that ties wireless communication devices into a network Also known as a base station the access point is usually connected to a wired network Antema Gain Antennae don t increase the transmission power but focus the signal more So instead of transmitting in every direction including the sky and ground antenna focus the signal usually either more horizontally or in one particular direction This gain is measured in decibels Bandwidth The amount of transportation space an Internet user has at any given time Bridge Bridges are similar to repeaters or network hubs devices that connect network segments at the physical layer Connects multiple network segments at the data link layer Collision A network node characteristic for proactively detecting that it can transmit a avoidance signal without risking a coll
109. possible allowed Access Points by SSID and their corresponding passphrases must be specified in the connection list since WPA Pre Shared Keys are derived from both passphrase and SSID man_240E_v1 13 doc Chapter Three Operation pl WDS Configuration Microsoft Internet Explorer O x He Edt View Favores Tos bebe o Q Back z x B TN JO Search Se Favorites 3 w z E rel 33 Wireless Mode Layer 3 bridge 3 address mode O WDS IEEE802 11 4 address mode Bridge Spanning Tree Protocol Vv Bridge Priority 32768 AP to AP Connections Inherit default encryption Vv Auto connect to WDS enabled APs e Only connect to APs in list below o Maximum WDS connections to this device 5 E E a An example of using WDS router interfaces to achieve a similar physical topology to the WDS bridge example discussed earlier is illustrated below In both examples there are four WDS Access points each with the possibility of having their own client stations associated In both examples A B C and D can all exchange data with each other The bridged example has the advantage of redundancy but at the expense of extra overhead The routed example below cannot provide the redundancy of the bridged example and requires more configuration effort but does not have the overhead of using the bridge Spanning Tree Protocol so is suited to fixed installations that do not require redundancy Access Point Access Point 192
110. r a radio link the upgrade may take longer depending upon the quality of the radio link and the amount of traffic on the network Page 81 240U E Wireless Ethernet During the upgrade the webpage shows a progress bar at the bottom right side of the browser window sc A A TS IN as o ivity Select file eprpm 358 tns Clara Monitor Communications Save to Fisshard Reset Save to flash Carce L_Savetofiesh_ Carcel Stat 5 m Dl kewe roy HONDE HEI INGA ide O more When upgrade is completed the System Tools webpage will be shown if Save to Flash was clicked If Save to Flash and Reset was clicked the unit will display a message that the module is resetting Firmware upgrade is now complete Manual Upgrade using Flash Update 1 Connect the module s ethernet port to PC ethernet port via a straight through ethernet cable Straight through ethernet cable is typically a blue colour Alternatively connect the module to PC via a network switch or hub as some configurations of Windows can encounter difficulty upgrading without a hub connected On some PCs Windows can take much longer than expected to initialise its network interface when the device is reset connecting via a hub switch removes this issue during the upgrade procedure 2 Switch dip switch on module to SETUP mode 3 Power up the module and wait a couple seconds This will ensure that Windows networking can correctly detect
111. r password Click on Factory Default Configuration Reset and wait for unit to reset When reset the LINK LED will flash Extending a wired network rl Access Point Configuration Connect straight through Ethernet cable a Client 4 between PC and 240U E E Bridge e Ensure configuration PC and 240U E are ae Hez D NR setup to communicate on the same 255 255 255 0 gt PE network Access Point e ri e Set dipswitch to SETUP mode Bridge Client 2 Ethernet Device Bridge e Power up unit and wait for LINK led to cease flashing e Adjust PC network settings Set Configuration PC network card with network setting of IP address 192 168 0 1 netmask 255 255 255 0 e Open configuration webpage with Internet Explorer at address http 192 168 0 1XX where XX 1s the last two digits of the serial number When prompted for password enter default username user and password user Enter Network and select Operating Mode as Access Point Select Device Mode as Bridge Change the Gateway IP Address to 192 168 0 1 Change the Ethernet and Wireless IP addresses to 192 168 0 200 Change Ethernet and Wireless Subnet masks to 255 255 255 0 Enter a System Address SSID string Select the Radio Encryption required Set dipswitch to RUN Save the changes and unit will restart with new settings Client 1 Configuration man_240E_v1 13 doc Chapter Three Operation Perform the same configuration steps as the Access Point
112. r permanently assigned All TCP IP messages contain the address of the destination network as well as the address of the destination station This enables TCP IP messages to be transmitted to multiple networks subnets within an organization or worldwide VoIP Voice transmission using Internet Protocol to create digital packets distributed over the Internet VoIP can be less expensive than voice transmission using Page 89 240U E Wireless Ethernet standard analog packets over POTS Plain Old Telephone Service VPN A type of technology designed to increase the security of information transferred over the Internet VPN can work with either wired or wireless networks as well as with dial up connections over POTS VPN creates a private encrypted tunnel from the end user s computer through the local wireless network through the Internet all the way to the corporate servers and database WAN A communication system of connecting PCs and other computing devices across a large local regional national or international geographic area Also used to distinguish between phone based data networks and Wi Fi Phone networks are considered WANs and Wi Fi networks are considered Wireless Local Area Networks WLANs WEP Basic wireless security provided by Wi Fi In some instances WEP may be all a home or small business user needs to protect wireless data WEP is available in 40 bit also called 64 bit
113. rom an AP with a stronger signal than the current AP providing SSID is the same and capability information are compatible it may disconnect from the first AP and establish a link with the second AP This functionality permits a client to have mobility whilst maintaining a link with the most suitable AP LED Indication The following table details the status of the indicating LEDs on the front panel under normal operating conditions ESEC weg Radio LINK On On when a radio communications link is established Radio LINK Off Communications failure or radio link not established Radio LINK GREEN flash Serial Port Receiving RED flash CTS low LAN Link Established on Ethernet port LAN Activity on Ethernet port GREEN flash Rs232 Serial Port Activity RED flash Rs485 Serial Port Activity Io Off Digital Output OFF and Input is open circuit The Ethernet RJ45 port incorporates two indication LEDs The LINK LED comes on when there is a connection on the Ethernet port and will blink off briefly when activity is detected on the Ethernet Port The 100MB LED indicates that the connection is at 100 MBit Sec The 100MB LED will be off for 10MB Sec connection man 240E _v1 13 doc Chapter Three Operation Other conditions indicating a fault are described in Chapter Six Troubleshooting 3 2 Selecting a Channel The 240U E conforms to the IEEE 802 11 Wireless LAN specification The 240U E supports 11 radio channels in the frequency range 24
114. s WANs and the Internet This includes VoIP Voice over IP IP address A 32 bit number that identifies each sender or receiver of information that is sent across the Internet An IP address has two parts an identifier of a particular network on the Internet and an identifier of the particular device which can be a server or a workstation within that network IPX SPX IPX short for Internetwork Packet Exchange a networking protocol used by the Novell NetWare operating systems Like UDP IP IPX is a datagram protocol used for connectionless communications Higher level protocols such as SPX and NCP are used for additional error recovery services Sequenced Packet Exchange SPX a transport layer protocol layer 4 of the OSI Model used in Novell Netware networks The SPX layer sits on top of the IPX layer layer 3 and provides connection oriented services between two nodes on the network SPX is used primarily by client server applications ISA A type of internal computer bus that allows the addition of card based components like modems and network adapters ISA has been replaced by PCI and is not very common anymore ISDN ISO Network Model A type of broadband Internet connection that provides digital service from the customer s premises to the dial up telephone network ISDN uses standard POTS copper wiring to deliver voice data or video A network model developed by the International Standards Organization
115. s are not required select this option see section 3 7 Layar o Mdg Normal Operation for details on Layer 3 bridge WDS Select WDS to enable Access Point to Access Point communications Bridge Spanning Select this to enable Bridge Spanning Tree Protocol when the default radio Tree Protocol interface is bridged see section 3 9 Spanning Tree Protocol Bridge Hello Time The hello time is the time in seconds that all bridges wait before sending a hello packet BPDU Bridge Protocol Data Units Time selectable in 125msec increments and default interval is 4 second BPDU data frames between bridges that exchange information on bridge man_240E_v1 13 doc Chapter Three Operation IDs and root path priority etc Bridge Forward Delay The forward delay is the time that is spent in the listening and learning state processing the BPDU s and determining the topology of the network Time selectable in 125msec increments Bridge Maximum Age The max age timer is the maximum length of time that passes before a bridge port saves its configuration BPDU information Time selectable in 125msec increments and default interval is 20 second Bridge Priority The bridge priority when the Spanning Tree Algorithm is enabled Defaults to 32768 with minimum of O highest priority maximum of 65535 lowest priority Auto connect to WDS Enable AP s Attempt to automat
116. s of the destination Modbus TCP Server for the specified transaction Response Timeout Enter the timeout in milliseconds to wait for a response to the specified transaction Comm Fail Register Enter the onboard I O Register number to store the communication status of the specified transaction The Specified register will be set to 0 if communications is successful OXFFFF if there is no connection to the specified server or OXFFxx where xx is the Modbus Exception Code Protocol RTU or TCP Determines what protocol is sent by the Client to the Server e g if the Server is using Modbus TCP RTU Gateway the protocol will probably be TCP If the Server is only using the Serial Gateway then the Protocol will be RTU Port TCP Port number used in conjunction with the Protocol Le if protocol is TCP the port will probably be 502 Modbus TCP If protocol is RTU then the Port will need to match the selected port on the serial Gateway of the server e g listening port 3 16 Socket Routing TCP IP Port forwarding The 240U E is primarily a TCP IP Routing Server to which a number of external TCP IP Clients may connect Since TCP IP connections are point to point only Socket Routing allows a number of remote TCP IP clients to connect to the 240U E simultaneously the 240U E can then route data between the separate remote client devices as necessary Socket routing requires that the remote devices
117. same network so that each can operate at optimal performance A switch acts as a networks traffic cop rather than transmitting all the packets it receives to all ports as a hub does a switch transmits packets to only the receiving port TCP A protocol used along with the Internet Protocol IP to send data in the form of individual units called packets between computers over the Internet While IP takes care of handling the actual delivery of the data TCP takes care of keeping track of the packets that a message is divided into for efficient routing through the Internet For example when a web page is downloaded from a web server the TCP program layer in that server divides the file into packets numbers the packets and then forwards them individually to the IP program layer Although each packet has the same destination IP address it may get routed differently through the network At the other end TCP reassembles the individual packets and waits until they have all arrived to forward them as a single file TCP IP The underlying technology behind the Internet and communications between computers in a network The first part TCP is the transport part which matches the size of the messages on either end and guarantees that the correct message has been received The IP part is the user s computer address on a network Every computer in a TCP IP network has its own IP address that is either dynamically assigned at startup o
118. sions of modules to be upgraded are unknown The section Manual Upgrade using Flash Update outlines the upgrade procedure Web based Upgrade If the module has application firmware version v1 21 or later currently installed please follow these steps to upgrade the unit 1 Place the new application firmware file epm_E24G_x x bin gz on the computers hard drive Ensure that the file is not placed in a deeply nested folder 2 Open internal webpage of unit to be upgraded and Select System Tools from Menu 3 Select Firmware upgrade from the System Tools menu 3 System Tools Microsoft Internet Explorer _ 0 xj File Edit View Favorites Tools Help Q Back z y x B A J Search Y Favorites ral gt Address a http 192 168 0 211 web systools asp y Go System Tools Configuration file Firmware Upgrade Factory Default Configuration Reset 4 Click Browse button and find the application firmware file on your computer Ensure that the file is not in a deeply nested folder as there is a character limitation of the filename and path man_240E_v1 13 doc Appendix A Firmware Upgrade E Firmware Upgrade Microsoft Internet Explorer D xj File Edit View Favorites Tools Help ay O ea O x a TN JO search Se Favorites Ol dr ts A 33 Address fa http 192 168 0 211 webfupgrade asp y Go Links gt a Firmware Upgrade Firmware upgrade may be perfor
119. ss 192 168 123 124 To configure Windows XP to establish a PPP connection to a 240U E in SETUP mode follow these steps 1 On Network Connections in Windows XP select Create a new connection Network Connections lex File Edit view Favorites Tools Advanced Help 4a O ea amp y yo Search 5 Folders EJ e Network Connections w Go Name Type Status Device Name Phone or Host Address Network Tasks Direct El Create a new connection Change Windows Fipew test PPP Direct Disconnected Firewalled Communications cable be Dina ah Dicc inaki settings Start the New Connection Wizard which helps you create a connection to the Internet to another computer or to your workplace network 050 D DISTO O PrEWanen AA cable be able be See Also LAN or High Speed Internet A Local Area Connection 2 LAN or High Speed Inter Connected Firewalled Winbond W89C940 Base Other Places A Local Area Connection LAN or High Speed Inter Connected Firewalled Realtek RTL8029 45 ba Details man_240E_v1 13 doc Chapter Three Operation 2 On the New Connection Wizard click Next New Connection Wizard Welcome to the New Connection A Wizard This wizard helps you Connect to the Internet Connect to a private network such as pour workplace network To continue click Next lt Back New Connection Wizard 3 Network Connecti
120. stances it is possible to mount the antennas inside buildings An obstructed path requires testing to determine if the path will be reliable refer the section 6 of this manual Where it is not possible to achieve reliable communications between two 240U E modules then a third 240U E module may be used to receive the message and re transmit it This module is referred to as a repeater This module may also have a host device connected to it The 240U E unit has two antenna connections at the top of the module allowing two antennas to be fitted to the unit The left connector looking at the front labeled RX is connected only to the internal wireless receiver The right connector labeled TX RX is connected to both the transmitter and receiver Note when only one antenna is used it must be connected to the right TX RX connector Plant and factory installations Most installations in industrial plants and factories use a single omni directional antennas Installations can suffer from multi path fading effects where multiple reflected radio signals adversely affect the signal strength This can be checked by moving the antenna a short distance 10 cm or 4 inches if the signal increases significantly then there are multi path effects In a static installation where the radio path is not changing moving an antenna to the position of maximum signal solves this problem However where the radio path changes because the 240U E is
121. t Whitelist or Blacklist Check the box to make the list a whitelist This will allow devices with the MAC addresses listed to communicate with the module and utilize the radio link All other devices are blocked unless they exist in an IP whitelist Uncheck the box to make the list a blacklist This will prevent all listed devices from using accessing the module and using the radio link Apply Changes Update settings Apply Changes and Save Update settings and save to non volatile memory man_240E_v1 13 doc Chapter Three Operation IP Address Filter Configuration Add Entries Enter the details of IP traffic to be added to the list Protocols ARP ICMP TCP and UDP may be selected Other IP protocols may be selected provided the IP protocol number within packets is known TCP and UDP traffic may be also limited to specific port numbers Delete Entries Check the delete box alongside entries selected for removal from the list Alternatively check the enable box alongside entries if you want to make the rule active Whitelist or Blacklist Check the box to make the list a whitelist This will only allow traffic described in the list to be sent over the radio link All other traffic is blocked unless it is present in a MAC whitelist Uncheck the box to make the list a blacklist This will ban all traffic described in the list from being sent to the module or over the radio link
122. t an authorized MAC address masquerade as a legitimate address and access a closed network Every wireless 802 11 device has its own specific MAC address hard coded into 1t This unique identifier can be used to provide security for wireless networks When a network uses a MAC table only the 802 11 radios that have had their MAC addresses added to that network s MAC table will be able to get onto the network NAT Network Address Translation A network capability that enables a houseful of computers to dynamically share a single incoming IP address from a dial up cable or xDSL connection NAT takes the single incoming IP address and creates new IP address for each client computer on the network NIC A type of PC adapter card that either works without wires Wi Fi or attaches to a network cable to provide two way communication between the computer and network devices such as a hub or switch Most office wired NICs operate at 10 Mbps Ethernet 100 Mbps Fast Ethernet or 10 100 Mbps dual speed High speed Gigabit and 10 Gigabit NIC cards are also available See PC Card Proxy server Used in larger companies and organizations to improve network operations and security a proxy server is able to prevent direct communication between two or more networks The proxy server forwards allowable data requests to remote servers and or responds to data requests directly from stored remote server data RJ 45 Standard con
123. th the main beam horizontal DIRECTIONAL pointing in the forward direction If the Yagi is transmitting to a ANTENNA vertically mounted omni directional antenna then the Yagi elements should be vertical If the Yagi is transmitting to another Yagi then the elements at each end of the wireless link need to in the same plane horizontal or vertical Directional radomes should be installed with the central beam horizontal and must be pointed exactly in the direction of transmission to benefit from the gain of the antenna Parabolic antennas should be mounted as per the manufacturer s instructions with the parabolic grid at the back and the radiating element pointing in the direction A A of the transmission ig ek Ensure that the antenna mounting bracket is well connected to ground earth man_240E_v1 13 doc Chapter Two Installation 2 Power Supply The 240U E module can be powered from a 9 30VDC power supply The power supply should be rated at 1 Amp The positive side of the supply must not be connected to earth The supply negative is connected to the unit case internally The DC supply may be a floating supply or negatively grounded The power requirements of the 240U E unit are 240mA 12V or is eae 150mA 24VDC This is O A inclusive of radio and Ethernet 9 30 Y ports active amp serial port plugged SUPPLY aed VDC f 1n Transmission current 1s nominally 350mA at 12V
124. thed structure a lightning rod may be installed above the antenna to provide shielding 2 2 1 Dipole and Collinear antennas A dipole or collinear antenna transmits the same amount of radio power in all directions as such that are easy to install and use The dipole antenna with integral 5 meters 15 feet cable does not require any additional coaxial cable however a cable must be used with the collinear antennas Collinear and dipole antennas should be mounted vertically preferably 30 cm 1 foot away from a wall or mast to obtain maximum range Page 13 240U E Wireless Ethernet 30 cm minimum gt COLINEAR ANTENNA WEATHERPROOF CONNECTORS WITH SURGE ARRESTOR 3M 23 TAPE OPTIONAL COAXIAL CABLE PROVIDE GOOD GROUND CONNECTION TO MAST MODULE AND SURGE ARRESTOR AN STRESS RELIEF LOOP MAST GND EARTH STAKE IF GROUND CONDITIONS ARE POOR INSTALL MORE THAN ONE H STAKE INSTALL AERIAL ABOVE LOCAL OBSTRUCTIONS 2 2 2 Directional antennas Directional antennas can be o a Yagi antenna with a main beam and orthogonal elements or a a directional radome which is cylindrical in shape or a aparabolic antenna A directional antenna provides high gain in the forward direction but lower gain in other directions This may be used to compensate for coaxial cable loss for installations with marginal radio path Yagi antennas should be installed wi
125. ting Rules to configure the next hop router to use for a given destination host or network address The 240U E allows up to 30 routing rules to be configured Routing Rules Add Entry Delete Entry Name Destination Gateway Subnet Mask 1 Route to LAN B 169 254 109 0 192 168 0 74 255 255 255 0 2 Route to LAN C 169 254 102 0 192 168 0 73 255 255 255 0 Notes Name describes the routing entry Max 32 characters Destination specifies the destination network or host IP address Gateway specifies the IP address of the next hop router for the specified destination Subnet Mask specifies the subnet mask for the destination network ee Ss C The Routing Rules configuration page can be accessed by selecting the Routing link on any of the configuration web pages Up to 30 routing rules may be added to each 240U E The table below summarizes the configurable parameters of a routing rule Name A name to describe the routing rule Max 32 characters Destination The destination network or host IP address to specify a network address set the host address to 0 i e for a class C IP address 192 168 0 0 would specify a destination network while 192 168 0 16 specifies a destination host Gateway The IP address of the next hop router for the specified destination Subnet Mask The subnet mask for the destination network
126. tory Default dip switch on 240U E to RUN position and cycle power to resume normal configured operation man 240E _v1 13 doc Chapter Three Operation Welcome to 240U E Configuration and Diagnostics Windows Internet Explorer GO v http 192 168 0 100 web main asp it View Favorites Tools Help Welcome to 240U Conf x EE Welcome to 240U Config TE ee ELPRO Technologies ia 240U E Configuration and Diagnostics Welcome to the configuration and diagnostics of 240U E Device boot with dipswitch set for MAC Address 00 12 AF 00 05 D0 Owner unknown Contact unknown Description Factory default settings Location unknown Model 240U E Serial Number 02060239 05061132900 Hardware Revision E2400P 300 Firmware Version E24G 1 47 Feb 16 2009 12 47 22 Powered by WEBSERVER 3 4 2 Set 240U E to same network as PC This is the alternate procedure to setting an IP address in the 240U E Consult your network administrator for an IP address on your network the gateway IP address and network mask a Switch Factory Default dip switch on 240U E to SETUP position b Connect the RS232 port on the 240U E to the RS232 port on the PC using a straight through serial cable c Open a terminal package such as HyperTerminal with 19200bps data rate 8 data bit 1 stop no parity and no flow control Make sure that no other programs have control of the serial port
127. uffer Serial Number 99SA01000000 Done Recovery Configuration ip address 192 168 0 112 net mask 255 255 255 0 gateway 192 168 0 1 host 192 168 0 1 0x30000000 eip mount point memory fecO connected at 10M Half Duplex fec0 local ip 192 168 0 112 server ip 192 168 0 1 Press ENTER to abort automatic booting e Check values for Boot Address Boot Netmask and Boot Gateway These values should be set to reflect those of the PC you are using to configure the unit If these are correct skip to step h You may check settings again with the rct command For further help type the help command f Set Boot Netmask to the same settings as the computer you have the Ethernet cable connected to This may be performed with the command bnm lt Type the netmask gt g Set Boot Gateway to the same settings as the computer you have the Ethernet cable connected to This may be performed with the command bgw lt Type the gateway IP address gt h Choose an IP address for the 240U E being upgraded This IP address must be on the same network as the computer you have connected the Ethernet cable to This may be performed with the command bip lt Type the IP address gt man_240E_v1 13 doc Chapter Three Operation 1 Switch dip switch on 240U E to RUN position j Type the command reset or cycle power to the unit The 240UE will reset and start with the network settings you have entered k Open Internet
128. uration Master Port When a master slave protocol is to be used by remote devices specify the TCP Port number on the 240U E that the master device will connect to Set this field to 0 if there is no master device Slave Port Specify the TCP port number on the 240U E that non master remote devices will connect to Max Connections Enter the maximum number of devices that are allowed to connect to this Routing Server default is 32 maximum is 50 Modbus Mode If the remote devices are communicating using the Modbus RTU protocol select this option to enable the 240U E to route Modbus data frames to the correct location man_240E_v1 13 doc Chapter Three Operation Max Poll Fail When Modbus Mode is enabled enter the maximum number of times a slave device may fail to respond to a master request before that slave address is removed from the internal Modbus routing tables and it s location must therefore be rediscovered using broadcast messages Enter 0 if entries in the routing table are never to be cleared Inactivity Timeout Enter the time in seconds after which if no data has been sent or received on any remote device connection to this routing server then that connection will be closed Enter O if an inactivity timeout is not required Send Keep alive TCP IP messages can be used to maintain the status of inactive remote device connections as an alternative to an inacti
129. vity time If this option is enabled then TCP keep alive probes will be sent on idle connections after the configurable Keepidle and Keepintvl times see the TCP IP Configuration Fields table above Password For added security remote devices can be required to provide a password in order to connect to the modem Enter the password here or leave blank if no password is required Each of the 3 Routing Server modes of operation is illustrated in the example configuration below where it can be seen that 3 separate Routing Servers have been configured note that in the majority of actual applications that only 1 Routing Server would normally be configured per 240U E The first entry uses the Modbus aware protocol mode the second entry uses the generic Master Slave mode and the final entry uses Broadcast mode We will take a closer look at the configuration of each entry below Looking at the first entry a Routing Server has been configured to operate in the Modbus aware protocol mode The Master Port is set to 5001 so the remote TCP IP client device where the Modbus Master is located must connect to TCP Port 5001 of the 240U E The Slave Port set to 5002 so that all remote TCP IP client devices where Modbus Slaves are located must connect to TCP Port 5002 of the 240U E Page 63 240U E Wireless Ethernet Socket Routing Windows Internet Explorer DER Go y http 192 168 0 100 web sockrout as
130. xample the 240U E clients need only specify the Access Point as their default gateway i e they require no routing rules be configured However for the Access Point to be able to deliver traffic to LAN B and LAN C it needs to have routing rules configured that specify the respective 240U E client routers as next hop routers i e gateways to networks B and C Note that devices on LAN A should specify the 240U E Access Point as their default gateway An alternative to adding routing rules to the 240U E in this example would be for each device on LAN A that needs to communicate with LANs B and C to independently have routing rules specifying the 240U E clients at B and C as gateways to those networks The routing rules for the Access Point in the above example are shown below The first entry shows the route to LAN B The gateway for the route to LAN B is configured as the wireless IP address of the 240U E client connected to LAN B The destination for the route is configured as the network address of LAN B Because the host id of the destination IP address is 0 it specifies a network address Consequently any traffic received at the Access Point with destination IP address 169 254 109 x where x is any host id will be forwarded to the 240U E at LAN B Page 43 240U E Wireless Ethernet EN Tole File Edit View Favorites Tools Help ES Qm O BO Yawn Trem OOS a JOS Address hetp j 192 168 0 s4 webjroute asp Eso lts gt al Use Rou

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