One: In local area network string mouth equipment networking

This way is the application scope broadest network way, for example in a factory automated system, the user needs if itself RS-232 connection perhaps the RS-422/485 connection is connected the workshop in each numerical control engine bed through the PX2002 string mouth networking server, operates the station establishment computer centralism operation, the monitoring system through the 10M/100M ethernet with on machine/operator workstation/engineer. The user assigns for each PX2002 in a string mouth server enterprise local area network the IP address, like 192.168.168.125. All becomes from this each numerical control engine bed has the IP address the network equipment.

Regarding this to the computer took the common control the application, the user regarding the numerical control engine bed with on position machine/operation station communication operating mode, may have 2 choices:
1.1 hypothesized strings mouths way: The hypothesized string mouth way is in the simplest local area network the equipment and the host controls the computer communication way. Through the PX2002 supplementary system software disposition, may each connection string mouth server numerical control engine bed string mouth, hypothesized become host controlling machine computer itself the string mouth, controls the computer from this the host to be possible wilfully to turn on the local area network with each the numerical control engine bed to carry on the real-time bidirectional data exchange. PX2002 disposition software, may support with the head of household controls the computer disposition to stem from COM1 to reach 99 hypothesized strings mouths to COM99. Under the hypothesized string mouth communication way, the system has a higher disposition and the load capacity to on position machine performance requirement, satisfies under the multi- strings mouth form data concurrent processing and the maintenance. Therefore the hypothesized string mouth communication mainly applies to the small scale terminal networking application
1.2 TCP connection: Uses TCP to be directly connected with the system terminal device, applies to the large-scale networking need. Under this application way, the user also must give each PX2002 string mouth server to assign in a local area network fixed IP. Because uses is the TCP direct connection way, in this request the position machine and the PX2002 string mouth server communication use the socket connection, user's on position machine form is TCP the Server establishment, and provides the formulation the port monitor. All connections terminal device PX2002 string mouth server by the establishment is TCP the Client pattern. This needs the user from to be possible to use VB, C##, language and so on Delphi develops the Socket application backstage software. Usually regarding large-scale applies the PX2002 string mouth server the application, we recommend the user to use in the socket way establishment the position machine and between the terminal direct TCP connection. We provide corresponding TCP Server test software and the Socket programming help documents.

Two: In city territory net string mouth equipment networking
The our company long-distance copies the table and in the long-distance control project in a thermal power plant, because each heat transfer station distributes in the city different position, the system requests RTU which each heat transfer stands all to have through internet and the thermal power plant computer common control system connection. We recommend the end-user to use are have the city territory net way which the Chinese telecommunication local subsidiary company provides by the PX2002 network. Each connects RTU the string mouth server all to dispose in a city territory net the fixed IP address. The system structure host controls the server is TCP the Server form, each connects RTU the PX2002 string mouth server disposition is TCP Client, the communication uses the TCP direct connection, provides copies the table and control software by the third party has the socket function. This network way with is nearly same in the enterprise local area network network basic principle and the establishment, the difference lies in is the city territory net which constructs by the telecommunication service provider, is a local area network which constructs by enterprise oneself.

Three: Uses the PPPOE agreement, uses ADSL the modem connection the cross gateway communication.
The our company produces the model is the PX2002 string mouth networking server, an important function has the PPPOE agreement stack, is connected with ADSL Modem may turn on the Internet, has the cross gateway communication the remarkable characteristic. In the scope regarding the enterprise local area network perhaps telecommunication service service business which this characteristic which provides the city territory net cannot cover, how strings together the mouth equipment networking, has the remarkable significance.

We similarly by a case explained in uses under the ADSL digit dialing, how strings together the mouth equipment to control the TCP connection with the far-end host which the computer establishes.

The domestic some UPS producer proposed a such demand to us: Based on prompt, is quick provides the long-distance equipment running status monitoring, the equipment far-end debugging and the maintenance to the user, the customer needs to give distributes UPS which sells in each place through the Internet connection, composes a cross gateway communication with the factory computer supervisory system the application.

Because the PX2002 string mouth server supports the dynamic IP connection which under the PPPOE way ADSL provides, simultaneously also supports the fixed IP connection which ADSL ties up decides. This kind of characteristic satisfied has distributed in each place, regardless of used the net to pass perhaps telecommunication ADSL turns on the networking the user each kind of form disposition.

In this plan, the UPS merchant host controlled the computer to dispose a legitimate male net IP address to take the TCP communication server end, each distribution in each place PX2002 string mouth server, through its stochastic equipment disposition software, is established the work is TCP the Client pattern, Remote Host IP Address (far-end main engine IP) established is that legitimate male net IP address which the USP producer disposed, the connection end slogan is the end slogan which the TCP communication server established. In this kind of situation, one but for the PX2002 string mouth server on the electricity, PX2002 the automatic use PPPOE way digit dialing will turn on the Internet to ADSL the modem, after will complete the networking, the PX2002 string mouth server will connect that UPS merchant to dispose good legitimate male net IP on own initiative the address the TCP server, and will establish the socket connection to this TCP server, with will complete the data transmission and the exchange.

Four: Does not have the TCP agreement interconnection between the equipment

We meet the customer frequently has such demand and the puzzle, how for instance lets two occupy the different position, moreover is separated by very far PLC perhaps RTU establishes the point-to-point communication, perhaps establishment very much selects communication pattern?
For example in a wide range factory district, 2 needs to exchange the data in between different workshop PLC, alone changes for this connection wiring is impossible perhaps extremely is inconvenient. If exactly these 2 PLC all may turn on the enterprise by PX2002 the industry ethernet, then may with stochastically match the software disposition which delivers is TCP the Server working pattern, moreover a PX2002 disposition is TCP the Client working pattern, and (the far-end main engine IP address) establishes Remote Host IP address for that took TCP Server PLC in the industry ethernet IP address which assigns and establishes its end slogan. Has had mutually the direct TCP communication ability from this these two PLC between, but does not need to draw support any computer help.

Same principle, if the user must establish between the equipment which a spot very much selects the TCP direct connection, may the PX2002 establishment which connects a equipment be TCP the Server working pattern, other attach PX2002 the string mouth equipment, the establishment is TCP the Client working pattern.

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Jinan Pu news science and technology limited liability company
Sale department: Li Min
Telephone: 0531-846424518 86.652206 million
Facsimile: 0531-86424519
Electricity postal: Limin@pxtech.cn
Websitewww.pxtech.cn

Jinan Puxun Technologies.Co., Ltd
No.5-1 Yangtouyu Street Jinan Shandong Province.P.R.China
Sales Manager: Mr.Li Min
Tel:+86-531-86424518 86.652206 million
Fax:+86-531-86424519
E-mail: Limin@pxtech.cn
MSN:puxuntech@hotmail.com
Skype:pxtech2
Web:www.linkports.com