Representation of the data in Ethernet-TCP/IP
Deutschmann Automation GmbH & Co. KG
32
UNIGATE fieldbus gateway for Fast Ethernet V. 2.1
21.4.11
Now this additional function can be adjusted at the Fast Ethernet gateway so that the Modbus
data can be made available as TCP-Modbus data packet on the Ethernet side.
(MODBUS-TCP).
For this purpose the channel that is used for this feature has to be set up as MODBUS-TCP
channel in the script.
For this function a running Modbus-Script is required.
11.4.3
On occurrence of particular events it is possible to send an e-mail to certain subscribers of a
mailserver. (The event is to be queried from the script.) In the data that are received by the serial
interface or that are to be output at the serial interface certain characters or character strings can
be analyzed. On appearance of a particular sequence an e-mail that was prepared before and
that was written in the script can be sent to one or several subscribers. For this purpose the
e-mail is sent to a webserver.
This e-mail function is called up from the script.
11.4.4
Server
11.4.4.1 Webserver
Websites can be called up through a communication channel that has been set up as webserver
channel via a script. Here the internal data system is used. Several websites can be placed or
rather websites, image files and Java-applets can be called up. This way it is also possible to
represent the dynamically changing data of an application, that is connected to the serial inter-
face (shift register). Apart from that it is possible to remote-control an application with control ele-
ments on the website or to transmit data to this application.
Dynamic data on a website without Java-applet: not specified yet.
Taking over CGI-script-commands from a website: not specified yet.
(String could be sent to the active communication channel.)
The webserver is set up once by initializing the channel in the script.
Additionally the existence of data files, which can be called up as website, in the data system has
to be guaranteed.
The webserver is running irrespective of the script.
11.4.4.2 FTP-server
For this function of the FTP-server 2 of the 4 available communication channels have to be set
up. One of the channels is in charge of the control, the other channel is responsible for the data
transmission. Once that the set up of the channels has been carried out initially in the script, it is
possible on the Ethernet side to store files in the internal file system, to load files, to delete files
etc...with a FTP-client-program.
Available functions:
PUT
=
Create and write file
GET = Read
file
DIR = Read
directory
DEL = Delete
file
DEL *.* =
Deleting all files and initializing (mapping) the file system.
