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16 History

UPnP:

Universal Plug and Play

Devices announce their presence on the network, and return their capabilities on the network.
Depending on the type of device certain configuration is done, specific functions become avail-
able.
Specialized software can detect those devices, and offer their services without manual config-
uration.

VPN:

Virtual Private Network

A public network is used to transport data for a limited set of stations. Drivers on these
stations generate virtual network cables between the stations.

In many installations the

communication through the public network is encrypted, to avoid tampering of the lines.

WEP:

Wired Equivalent Privacy

An encryption scheme used with early implementations of WLAN. The idea was to make it
as difficult to read other persons data, as it was with cable communications. Due to weak
definitions in WEP nowadays it may cost an attacker less than a minute to get the current
encryption key.

WLAN:

short for Wireless LAN

This is a general name, however today this phrase is used for the IEEE 802.11-protocol
definitions.

WPA:

Wireless Protected Access

This is the successor of WEP. WPA not only includes better/stronger encryption, there is
also a set of functions to restrict access by means of user authorization, or different hardware
parameters (MAC address, distance).

WPA2:

Wireless Protected Access 2

This a modified version of WPA. Most important is the implementation of AES-256 as avail-
able cypher.

16 History

January 2015

First release of manual for NetCom Plus

February 2015

Add WLAN configuration

Add Modbus/TCP on NetCom Plus 811 DIO

May 2015

Complete the list of models

September_2015

More pictures, and technical data refined

Firmware Version 3.2.2
Support for Port Expansion via USB-COM Plus models
Instructions (FAQ) for Linux use

January 2016

Remote Access by viaVPN documented (Chapter 11)

PPP Option removed
Orange LED for 3G/4G mobile network added
Firmware Version 3.3.1

August 2016

New Driver for NetCom

+

Firmware Version 3.3.4

September 2016

NetCom Plus User Manual

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Содержание NetCom Plus 111

Страница 1: ...Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus NetCom Plus Ne...

Страница 2: ...without warranty of any kind either expressed or implied including but not limited to its particular purpose Vision Systems reserves the right to make improvements and or changes to this manual or to...

Страница 3: ...tCom Plus 811 DIO 20 2 4 Packing List 21 3 Hardware Description 22 3 1 Serial Port Configuration 22 3 2 Serial Signal Assignment 23 3 3 RS422 485 Electrical Configuration 24 3 3 1 Termination Resistor...

Страница 4: ...allation of a NetCom 55 5 6 Firewall Traversal Configuration 55 5 6 1 SOHO Firewall example 55 5 6 2 SOHO Virtual Servers 56 5 6 3 NetCom Detection through SOHO Firewall 56 5 6 4 Serial Ports through...

Страница 5: ...tion of NetCom 93 7 Operation in Linux 94 7 1 Via Fixed TTY Pseudo Serial Port socat 94 7 2 Via TCP Raw Server Mode 95 8 IP Modem Function 96 8 1 Some possible Scenarios 96 8 2 Serial Signals and Cabl...

Страница 6: ...9 3 Operation in Windows 107 9 3 1 Add a New Printer 107 9 3 1 1 Create new printer port 107 9 3 1 2 Name the new Printer Port 108 9 3 1 3 Configure the Printer Port 109 9 3 1 4 Install Printer Drive...

Страница 7: ...1 NetCom Plus 111 113 14 2 NetCom Plus 213 Top Front Left and Back Side 15 3 NetCom Plus 411 413 Front side 17 4 NetCom Plus 411 413 413 POE Rear side 17 5 NetCom Plus 411 POE Rear side 18 6 NetCom P...

Страница 8: ...tall NetCom Drivers in Windows 7 Start Menu 49 47 Remove Repair 49 48 NetCom Plus Manager 50 49 NetCom Manager in Start Menu 50 50 NetCom Manager Servers Panel 51 51 NetCom Manager Server Settings Inf...

Страница 9: ...ave modified Parameters in Telnet 92 96 Menu Exit from Configuration in Telnet 93 97 Exit and Reboot in Telnet 93 98 Add a printer 107 99 Select Printer Port 107 100 Create Printer Port 108 101 Name P...

Страница 10: ...NetCom Plus 813 19 13 Characteristics of NetCom Plus 813 POE 19 14 Characteristics of NetCom Plus 811 DIO 20 15 DIP Switches 22 16 Signal Assignment DSub 9 male 23 17 LED Function 26 18 SOHO Firewall...

Страница 11: ...where explicitly noted otherwise All models are available with an option for Wireless LAN The devices come with a steel case well suited for industrial environments The NetCom Plus support high serial...

Страница 12: ...remote configuration via SNMP Drivers for Windows operating systems Documented interface for every networked operating system 2 3 Product Specifications Most of the hardware characteristics are commo...

Страница 13: ...operation Management Serial console Telnet Web browser SNMP Driver software Windows 10 8 1 8 7 2008 Vista 2003 XP Management software Driver installation and configuration program Management console...

Страница 14: ...W D H Weight 400 g Table 3 Characteristics of NetCom Plus 113 a NetCom Plus 111 113 on DIN Rail with Front Top and Left Side b Rear Side Figure 1 NetCom Plus 111 113 The NetCom Plus 111 and the NetCo...

Страница 15: ...9V to 54V 250 mA 12V Power Connector Terminal Block 3 7 1 Serial Ports 2 RS232 RS422 RS485 Serial Speed 180 bps up to 3 7 Mbps Data bits 5 6 7 8 USB Port For Expansion of Ports and WLAN Dimensions 11...

Страница 16: ...54V on some samples Power Connector Terminal Block 3 7 1 Power Alternative Power over Ethernet PoE 802 3af Class 0 Serial Ports 4 RS232 Serial Speed 180 bps up to 500 kbps Data bits 7 8 Dimensions 196...

Страница 17: ...CIe Slot Optional for 3G 4G modems LED 3G Orange If mobile network is available Serial Ports 4 RS232 RS422 RS485 Serial Speed 180 bps up to 3 0 Mbps Data bits 7 8 USB Port For Expansion of Ports and W...

Страница 18: ...m Plus 811 Eight Ports Power Requirement DC 9V to 54V 800 mA 12V Power Connector Terminal Block 3 7 1 Serial Ports 8 RS232 Serial Speed 180 bps up to 1 0 Mbps Data bits 7 8 USB Port For Expansion of P...

Страница 19: ...haracteristics of NetCom Plus 813 2 3 2 12 NetCom Plus 813 POE Eight Ports Power Requirement DC 9V to 54V 800 mA 15V Power Connector Terminal Block 3 7 1 Power Alternative Power over Ethernet PoE 802...

Страница 20: ...the USB 2 0 expansion port The two holes for screws may be used as addtional contacts for Protective Earth 2 3 2 13 NetCom Plus 811 DIO Eight Serial Ports 8 Digital Input and 8 Digital Output Power Re...

Страница 21: ...h input and output signals The terminal block clamps are plug in so here each side is shown with one socket plugged and the other open The two holes for screws may either hold a fixture for cable stra...

Страница 22: ...nd is the position where the switch is pushed to Warning a bad configuration may cause serious damage in the NetCom or the connected device Off Bottom On Top a DIP Switch Description Line Mode Comment...

Страница 23: ...oftware the operation mode is controlled by the NetCom Plus in the same way as with the internal ports 3 2 Serial Signal Assignment It is of course important to know the exact location of the serial s...

Страница 24: ...able 3 3 2 BIAS Function RS485 requires a BIAS option for the communication lines This will guarantee stable electrical levels on the cables even at times when no station is transmitting data Without...

Страница 25: ...terrupted instead the common signal connects to the left clamp marked with the letter S These relay control either 2 A at 30V DC or 0 5 A at 125VAC 3 6 Network The NetCom Plus and NetCom Plus POE conn...

Страница 26: ...he NetCom Plus via WLAN this also includes the passwords Therefore the recommended method is to use the Ethernet connector for the first configuration Or in case of doubt use the first serial port to...

Страница 27: ...ed via the network cable connected to an Ethernet switch with PoE function as IEEE 802 3af This switch is referenced as the PSE Power Sourcing Equipment while the NetCom Plus POE is the PD Powered Dev...

Страница 28: ...ws is similar The installation of drivers is described first This is followed by a procedure to verify a correct installation The last part of this section is about the uninstall or update processes o...

Страница 29: ...in Windows 10 Figure 16 User Account Control Since a change of system configuration is intended by the driver installation confirm to start the software Figure 17 NetCom Driver Installation 4 1 1 2 Me...

Страница 30: ...d the final installation is planned to happen there Finally the third option is to Install Tools only no drivers At time of writing these tools are the NetCom Manager as well as the uninstall and repa...

Страница 31: ...ncreases with the progress of each step performed in the installation process The lower bar illustrates each step performed until full installation is finished 4 1 1 4 Request for Trust While copying...

Страница 32: ...l does exactly that The Windows Firewall is disabled completely This should never be necessary and is an option of last resort in case of trouble Do nothing continue does nothing as suggested It is th...

Страница 33: ...ect only one NetCom to your network This single Device is listed here Identify it by comparing the serial number shown in the NetCom Manager 4 1 2 1 Configure IP Parameters As mentioned above it is im...

Страница 34: ...the IP Address Figure 25 DNS Name for NetCom Server Click the DNS button and enter the Qualified Domain Name defining the NetCom Server Your Administrator will provide you with it This name is transla...

Страница 35: ...e 55 For now proceed with the standard installation 4 1 3 Install Drivers You are now back in the NetCom Plus Manager Click the OK button the installation continues Windows detects the serial ports on...

Страница 36: ...u may notice the installation of the NetCom followed by the Virtual Com Ports appearing one after the other 4 2 Verify the Installation Figure 29 VScom drivers in the Start Menu In the Start Menu you...

Страница 37: ...re 47 the Installation Wizard offers an option to Update the drivers to a new version Windows itself also offers an option to update the drivers of installed devices Although this is a functional opti...

Страница 38: ...se them In the Device Manager they appear as NetCom Plus COM Port figure 30 Without special tests a program does not see a difference between Com1 and the virtual Com7 For example the Hyper Terminal4...

Страница 39: ...0 Microseconds This added time has an impact on reaction times Some data protocols may be sensible A lot of configurations are possible to compensate for this But these have an effect on the sheer dat...

Страница 40: ...network operations Virtual FIFO Off simulates a deactivated FIFO which is the fastest setting in terms of latency The port is configured as if the FIFO is off buffers are configured to never wait for...

Страница 41: ...size of the buffer And also the maximum packet size sent to the serial port by the driver software Rx Network Buffer Size This is the size of the buffer to receive data from the NetCom Automatic Trig...

Страница 42: ...l Up connection will not automatically close Passive Modem This option controls how often the driver retrieves Modem status information from the NetCom If activated the driver never asks for the modem...

Страница 43: ...the amount of data in this buffer drops below this level the NetCom is capable to receive new data It will send a related event to the driver software Rx Trigger Level When the serial port has receive...

Страница 44: ...ion has the option to use any combination of these methods at the same time The command to use them is transferred to the NetCom For example if the port is configured to use Hardware Flow Control the...

Страница 45: ...fferent ways the NetCom servers are listed Figure 36 New NetCom The first time a NetCom is detected it is displayed in blue color This indicates a New status i e it is not yet installed in the system...

Страница 46: ...on this specific com puter The Exclude button is used for that purpose Select a NetCom Device and click on that button The driver will later ignore this NetCom when installing and operating the seria...

Страница 47: ...s i e this has been changed not using the Manager application Reasons may be the NetCom has been moved to a different location or the logical structure of the network has changed Because of the change...

Страница 48: ...evices by the combination of IP Address and serial number plus MAC Address If one of these is changed the above requests appear 4 5 Uninstall the Drivers and Tools To completely uninstall the NetCom D...

Страница 49: ...Wizard is of the same version as the installed drivers the option of Update is not available Figure 47 Remove Repair A Repair replaces the driver files on the system with those in the installation pa...

Страница 50: ...option Also the process of installing the drivers created a new program group in the Start Menu Figure 49 NetCom Manager in Start Menu This section of documentation focuses on man agement of the NetC...

Страница 51: ...manually section 5 5 Enter the network parameters to access the NetCom Select a NetCom and click on the Properties button double click the Icon or use a right click Using Verify the NetCom Manager co...

Страница 52: ...of NetCom Manager The next parameters are fixed and displayed for information only The Telnet port allows to configure this NetCom via Telnet The value is a TCP port number Factory setting is 23 the s...

Страница 53: ...e g the Com Number Each serial port may operate via two TCP ports Figure 52 NetCom Manager Server Settings Ports The TCP Control Port is used in the Virtual Com Driver mode and also in Null Modem Tun...

Страница 54: ...fied Domain Name DNS The Manager configures a NetCom via SNMP which uses UDP The Firewall must have a special Port to receive those data and to transfer it to the internal network Enter this port here...

Страница 55: ...perform a DNS name resolution If your NetCom is located on a dynamic IP Address e g on a Dial Up connection with 24 hours disconnection you need to reconfigure the driver installation when the IP Add...

Страница 56: ...the targets Connect the NetCom to your LAN Now you are ready for a very first test Use Telnet to connect to the Data port of the NetCom serial port Open a console DOS Box and type the command Telnet...

Страница 57: ...or the ViServ related to the serial port is still missing In the NetCom Manager Server Settings select the NetCom Manager Ports Panel In this panel select one serial port in this example of NetCom Plu...

Страница 58: ...l server accessible via the Internet Another way to work around the restrictions is the encrypted VPN chapter 10 on page 111 Also here the user provides a server to manage the OpenVPN connections and...

Страница 59: ...write down the value The default configuration of a NetCom is for use of a DHCP server When such is not available the IP Address defaults to 192 168 254 254 When the IP Address of the NetCom is not in...

Страница 60: ...ve and activate them Whenever this situation occurs the NetCom requests a REBOOT Figure 56 Request to Reboot in Web Browser It is done like this here you may reboot then or do that later when the conf...

Страница 61: ...r terminal type 1 VT100 2 VT52 1 1 Figure 58 Select Terminal Type in Telnet The configuration with Telnet is menu driven NetCom Plus 811 WLAN V3 0 1 ServerConfig SerialPorts Tools Save Exit h HELP Ser...

Страница 62: ...ovide the password This is the same configuration option as described above at 6 1 2 so follow the instructions for Telnet When the configuration is done change the DIP Switches back to normal operati...

Страница 63: ...t now For further information the UpTime is listed Contact and Location are user defined information They may later help to find the device in the installation and the person responsible for managemen...

Страница 64: ...DHCP Enabled IP Address 192 168 1 249 Netmask 255 255 255 0 Broadcast 192 168 1 255 Gateway 192 168 1 1 DNS 192 168 1 3 Domain visionsystems de ConfigPort 23 PrintServerPort 515 KeepAlive Off KeepAliv...

Страница 65: ...Print Server function at the configuration of the serial ports 6 2 2 2 8 on page 85 KeepAlive is an intrinsic function of the TCP IP protocol If used it causes network traffic traditionally intended...

Страница 66: ...used to get access to radio cells established by an Access Point By default the NetCom operates as an Access Point and uses an SSID built from the serial number This means it is the same as the defaul...

Страница 67: ...A string with 5 characters results in WEP40 using an ASCII key Using 10 characters as key defines this key as also WEP40 but with a binary key in hexadecimal notation Likewise a 13 character string is...

Страница 68: ...nVPN may be used to provide access via Internet and Firewalls or on mobile networks with minor effort But it requires deep knowledge about network operation and configuration of OpenVPN in particular...

Страница 69: ...e to configure the access of NetCom Plus to the Internet so it can establish the connection to the Rendezvous Server Many installations do not require configuration at all then there is no need for sp...

Страница 70: ...eters in the Server Configuration see para graph 6 2 1 2 on page 63 Range Start and Range End are the first lowest and last highest value the DHCP Server will assign to the Client PC side of the viaVP...

Страница 71: ...To protect against accidental mistyping you must type the Password twice 6 2 1 8 Date Time Web menu SERVER CONFIGURATION section Date and Time Settings Telnet ServerConfig option Date Time It may be...

Страница 72: ...Interval NetCom repeats to retrieve time The parameter Mode is used to find the definition of the Time Server In current firmware the time source is defined by the IP Address The Interval in seconds i...

Страница 73: ...ransfer Settings configures the operation mode of NetCom on the network Each serial port is configured separately there is no setting shared between ports Note The list of serial ports will automatica...

Страница 74: ...PortType current displays the current setting Serial Settings Port Nr 1 PortType current rs232 Baud Base 60000000 PortType rs232 Baudrate 38400 Manual 38400 FlowType None DataBit 8 Parity None StopBit...

Страница 75: ...The Baud Base is shown for reference only it is not necessarily an achievable bitrate DataBit per character Parity and StopBit are quite usual parameters The FlowType is available as standard configu...

Страница 76: ...allow different operation modes They are selected by the basic Mode set ting Depending on the current mode only some of the many parameters are useful The web configuration hides those parameters with...

Страница 77: ...e client per serial port An attempt to connect a second client is actively refused This is required to avoid confused configurations and data on the serial port The NetCom can monitor an open connecti...

Страница 78: ...rameters Compared to the Driver Mode only the data connection is defined by the TCP Port Data The Max Clients parameter allows for more than one connection to the NetCom at a time If the number is rai...

Страница 79: ...n The Destination can hold multiple hosts as targets for a connection They are en tered as a comma separated list of DNS names or IP Addresses Each destination will have a TCP port number separated by...

Страница 80: ...ng parameters for server function and for the client part The NetCom operates as a server while accepting connections in Driver Mode 6 2 2 2 1 If there is no current connection the NetCom may establis...

Страница 81: ...e TCP Raw Client mode So connections to the partners are permanent last until there is no activity for a given time or they are controlled by the DSR signal Attention You must not configure both NetCo...

Страница 82: ...Control 2000 TCP Port Data 2001 Max Clients 1 Client Off Destination TCP Port Control 2000 TCP Port Data 2001 Connect Triggered ShortHoldTime 0 KeepAliveMode On Connect KeepAliveInterval 0 Figure 80 T...

Страница 83: ...n a Trigger event defined in Connect cause the NetCom to establish a connection to the defined target So the NetCom is a client at that time 6 2 2 2 6 UDP Data Transfer UDP is an Internet Protocol whi...

Страница 84: ...characters Enter them numeric as xHH where HH is the hexadecadic code of the character or as OOO where OOO is the octal code of the character The backslash itself must be doubled as If none of these...

Страница 85: ...This string is sent to the serial printer at the beginning of the next queued print job The definition is in section 9 2 1 on page 105 6 2 2 3 Save Web menu SERIAL CONFIGURATION at bottom Again at the...

Страница 86: ...ime 1 560 msec 52 bytes from 127 0 0 1 icmp_seq 0 ttl 255 time 1 542 msec 52 bytes from 127 0 0 1 icmp_seq 0 ttl 255 time 1 542 msec back Figure 84 Ping and Response in Web Browser Tools Ping Statisti...

Страница 87: ...Logging Firmware Tools Port 1 Port 2 Port 3 Port 4 Figure 86 Statistics Port Selection Line Status DTR off 0 DSR off 0 RTS off 0 CTS off 0 DCD off 0 RI off 0 Common Serial Tx 0 Serial Rx 0 Figure 87...

Страница 88: ...0 LISTEN tcp 192 168 1 243 80 192 168 1 42 1280 TIMEWAIT tcp 192 168 1 243 80 192 168 1 42 1281 ESTABLISHED udp 0 0 0 0 161 udp 0 0 0 0 19970 udp 192 168 1 243 32331 a In Web Interface 1 1 Proto Loca...

Страница 89: ...ss Telnet Tools option Wireless When Wireless communications is intended it is useful to see a list of possible partner stations on the WLAN This function is available in many driver packages for Wind...

Страница 90: ...pload the file to the NetCom Tools Ping Statistic Netstat Wireless Logging Firmware Firmware Update Update Port 2400 Start Update Figure 92 Firmware Upload Via Telnet the option to upgrade the Firmwar...

Страница 91: ...tCom of the same type Configure one device and save the file Change the configuration file for the necessary parameters and upload the modified version to the next model 6 2 3 7 Logging and Debug Web...

Страница 92: ...2 3 7 6 2 4 Reboot Web menu REBOOT In your web browser click the Icon of REBOOT to restart the NetCom firmware Attention This option will discard all configuration changes unless they have explicitly...

Страница 93: ...changed during the session confirmation for saving them is requested Of course the Telnet configuration is closed because all TCP connections are terminated by the reboot process 6 3 Erase Configurat...

Страница 94: ...only So they want to open a device which behaves like a serial port usually dev ttyS0 or dev modem To create a pseudo device of this type the program socat may be used socat pty l i n k dev netcom0 r...

Страница 95: ...And all characters typed on the keyboard are sent via the serial port to the connected device The serial parameters used are stored in the NetCom e g 38400 8 n 1 without flow control If RTS CTS or a d...

Страница 96: ...eral stations from a central server Because of frequent target changes he does not want to define the target by a Virtual Com Port 3 Remotely distributed devices contact a central system by Modem This...

Страница 97: ...is replaced by IP Modem for brevity Two basic operation modes are available The first and default mode is Modem to Modem This requires a serial port of a NetCom configured as IP Modem on both ends of...

Страница 98: ...red always answered with OK N Auto serial speed N0 no Auto N1 reports error O Return to data mode Q Result Codes Enable or disable result codes strings S nn S S Register Set request configuration regi...

Страница 99: ...255 seconds Accept but ignore S9 Carrier detect response time 1 255 0 1 sec 6 S12 Escape Guard time 20 255 0 02 sec 50 1 second S25 DTR Ready Delay 0 255 0 01 sec 5 50 msecs S26 RTS to CTS Delay 0 25...

Страница 100: ...because very few software will support it So there is the option of dialing to a pre defined entry by shortcut This is given by an S followed by one or two digits The shortcuts S90 to S99 are reserve...

Страница 101: ...o remain quiet The Modem will not send any response messages to the serial port 8 5 7 AT V verbose ATV1 Responses as numeric values ATV0 or as text strings ATV1 OK 0 CONNECT 1 RING 2 NO CARRIER 3 ERRO...

Страница 102: ...nnn in the register rr Unknown registers report ERROR See section 8 4 2 above for possible registers and parameters 8 5 11 AT L loudness and 8 5 12 AT M speaker These commands are answered with OK bu...

Страница 103: ...eration of DSR is defined by AT S so these commands are related AT C1 is the default the DTR operates as DCD to the PC this will require a cable connecting NetCom DTR to the DCD of the PC This command...

Страница 104: ...ofile the short dial strings and the factory profile Parameters are accepted but ignored AT V is AT V0 and is AT V1 8 5 22 AT W save profile Save the current configuration as user profile AT W is the...

Страница 105: ...queue while the default name is lpd plus the number of the serial port lpd1 lpd2 This name is set in the properties of the serial port When the lpd is running on a separate computer the hard disk is...

Страница 106: ...lly when using Modem Control signals it will be required to hold them in a given state for a defined amount of time This may be done by applying a Pause command in the InitString The delay is given as...

Страница 107: ...r 9 3 1 Add a New Printer From Control Panel open the Printers and Faxes windows Select the Add a printer option The usual Add Printer Wizard appears Click the Next button to select the port where the...

Страница 108: ...ies of Print Server Port You need the network address of the NetCom this may be the IP Address or a DNS name for the device The port name is only for internal identification in Windows It will be list...

Страница 109: ...by the Print Server function in the NetCom Close these options with the OK button 9 3 1 4 Install Printer Driver Now the printer port is installed and the Printer installation Wiz ard continues Select...

Страница 110: ...e tab for Ports 9 3 2 2 Add the Print Server Port The button for Add Port opens a dialog with the possible printer port types Figure 104 Add Printer Port Select Standard TCP IP Port and click on New P...

Страница 111: ...ish the encrypted VPN link the NetCom Plus Servers use an Open Source product named OpenVPN http openvpn net OpenVPN is licensed under GPL hence there is no added costs for using it Currently OpenVPN...

Страница 112: ...2 NetCom OpenVPN Configuration The next task is to configure the NetCom Plus for encrypted communication It is assumed the NetCom Plus is already configured for the local physical network At this ste...

Страница 113: ...ith such a configuration file The NetCom Plus can handle any OpenVPN specific configuration so we will supply one client and one server example below For your computer side you have to use the opposit...

Страница 114: ...key dh data dh1024 pem cipher AES 256 CBC keepalive 10 120 comp lzo verb 3 only when password used for the key askpass data pass txt Figure 110 OpenVPN Server Configuration File For further parameter...

Страница 115: ...into the config directory of OpenVPN 10 3 3 Start NetCom Plus with OpenVPN active This is the moment to open the web browser again and access the Server Configuration of the NetCom Plus Go to the Open...

Страница 116: ...Figure 112 OpenVPN Connection is active Open your web browser and enter the IP Address 10 8 0 1 as the target address The NetCom Plus will answer and sends the welcome page Now you have encrypted comm...

Страница 117: ...link may be placed on the desktop or in the Start Menu 10 3 6 Start OpenVPN as Windows Service There are possible configurations which require a functional connection to the NetCom Plus Server withou...

Страница 118: ...e service can t be started at all Configured for Manual it requires explicit ac tion to run the software If the service is con figured for Automatic start the program is run when all drivers are final...

Страница 119: ...n this process typically the drivers for Virtual Com Ports are also installed configured and tested Now the situation may occur where encryption is a demand The change of installation is a rather simp...

Страница 120: ...d to have special network configuration at the NetCom or at the PC since typical configurations allow such an access by default But in this case the user has to provide the private server for OpenVPN...

Страница 121: ...rface section is shown for reference only The first parameters are to configure the access of NetCom Plus to the Internet to establish the connection to the Rendezvous Server Special parameters are su...

Страница 122: ...nnected via the Utility this is also signaled by the Ready LED This time the LED light is interrupted short time Off most time On Power LED Ready LED Status Off Device off no power On Off Firmware sta...

Страница 123: ...re implementation supports Discrete Inputs Coils Input Registers and Holding Regis ters These are the most useful function codes Function Decimal Code Single bit access Read Discrete Inputs 02 Read Co...

Страница 124: ...nificant bit LSB states the Input 2 is open zero and Input 3 is closed One In the same way it is possible to read the status of the output signals Normally your application would know this status sinc...

Страница 125: ...orks this is typically of the 192 168 type To configure NetCom for your LAN it must have the same 192 168 X as your computer and the same netmask So it needs a unique Y to establish communication 13 1...

Страница 126: ...if already used The NetCom Devices do not support this method However it is possible to assign a static IP Address to the NetCom which matches the network configuration Try to find an unused address i...

Страница 127: ...tmask If all this information is displayed as Zero the IP settings do not match your computers settings To correct this you need administrative privileges for your computer Start the NetCom Manager as...

Страница 128: ...ctions may fail if the Access Point does not broadcast the SSID The NetCom Servers need the broadcast to get the parameters from the Access Point Hiding the SSID is not a security feature anyway 14 Ma...

Страница 129: ...Host Configuration Protocol A service used to retrieve an IP configuration and optionally much more information from a database server FTP File Transfer Protocol A common protocol to access a file se...

Страница 130: ...st electrical noise RS422 allows for up to 16 receivers The typical transmission is via twisted pair copper cable using balanced signals Sender and receivers must share a common voltage range max 7 Vo...

Страница 131: ...current encryption key WLAN short for Wireless LAN This is a general name however today this phrase is used for the IEEE 802 11 protocol definitions WPA Wireless Protected Access This is the successo...

Страница 132: ...16 History September 2016 Operation Modes corrected Firmware Version 3 3 5 September 2016 NetCom Plus User Manual 132...

Страница 133: ......

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