We have a IDEC webserver unit for communication with a IDEC PLC
Java script running on the webserver
reads values from PLC data register and stores them on a server/database
takes values from a web interface and writes them to the PLC
Values on the server should then be visualized with graphs (daily, monthly,zoom etc)
in a Java (or appropriate language)on a webpage
Also input from webpage to PLC over webserver for some data registers (textbox)
There are sample java scripts available from IDEC reading and storing data over web interface,
only needs to be modified
I made a better description, please read attached files
There vstill seem to be misunderstandings, I changed the Scopewebdesign.pdf
The webserver really is an embedded module from Digi.com with 4MBflash,8MB RAM. Its a serial to ethernet converter, its just called webserver, because it connects the PLC to the web.as for all other PLC manufacturers with this capability
The or a java applet can stay in it or not, depends whats more elegant.
The AJAX or whatever script for the cron job is stored on a main server (a real server from a hosting company)
this script fetches the data from the PLC using the IDEC webserver to communicate from ethernet to the serial port of the PLC. This script now can use an applet stored on the IDEC webserver if convenient or just use the IDEC serial protocol that i uploaded.
This script loads the data from the IDEC webserver and stores them on a SQL database on the main server. no big deal i think, just a script implementing the communication protocol.
the main server also stores a website that can be loaded from anywhere in the world and from any browser to look at the data in the SQL database.
10 freelanceria on tarjonnut keskimäärin 338 $ tähän työhön
Hi, I have very gud experience in such these projects. I can give assure to give accurate and expected result / output. thank you & regards, Laxman, 6583020407. singapore.