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we are online. Our ICQ number is 163202313.
If
you do not have ICQ, please download it for free at
www.icq.com
The
Internet TRiLOGI version 5 normally
works like any other Windows based program, which lets a user program the PLCs
using a single PC connected to it via the RS232 port. However, due to its
client/server based architecture, you can also program the PLC from other
computers on a corporate LAN or any computers on the Internet using a Java web
browser. No additional training is required for a user to program the PLC via
the Internet because they are using the same Window based software that they
would already have mastered during programming in local
mode.
To allow the PLCs to
be accessible for remote programming and monitoring, you need a networked PC
which is connected to the PLC via serial ports, and this PC must run the
"TLServer" software, as shown in the following
diagram:

The TLServer
acts as a gateway to connect the M-series PLC to the corporate LAN or
the Internet. The actual connection to the Internet is provided by the PC and
this may be by means of Ethernet, T-1, DSL or cable Broadband or even dial-up
connection.
When a client program such as TRiLOGI wants
to read from or write to a PLC, it would send a command to the TLServer using
the TCP/IP protocol tranported via the Intranet, the Internet or a local host
connection. The TLServer, upon receiving the command, will carry out the actual
reading or writing to the PLC via the PC's RS232 or RS485 port. The data
received from the PLC is then relayed back to the client program via TCP/IP
protocol.
TLServer is also a Web Server which serves
up webpages that contain the TRiLOGI Java Applet to enable you to use any
Java-enabled Web browser to access the PLC without the need to install a local
copy of the TRiLOGI application software. |