E-terminal/E-panel
Hi Tony
With E-terminals you can do as you says.
It have many great communications functions. You can send alarms/reports via email througt modem or ethernet, make web page, use JAVA applets, make data exchange between PLCs, use 2 different PLC drivers on the same HMI etc etc
Yes you can access the HMI through modem connection, and yes if transparent mode is supported by the plc driver, like Mitsubishi and some others, you can also access the PLC/PLC-network on the second port through the modem.
Here are some links:
http://www.e-terminals.com/download.html
Under the section "Download/Operator terminals/E-series/Start-Up documents" you will find some documents regarding communication.
The E-terminals is made by Beijer Electronics, Sweden, so if you can read swedish
you can check out this adress:
http://www.beijer.se/swedish/Beijer_electronics/verksamhet/support/komigangdokument/index.htm
Look under "Kom igång-dokument/Kommunikation/Modem". There are several examples with analoge modem, GSM modem, SMS and e-mail. (The screen-shots of GX Developer are english...)
Good luck
Regards
Karl Egil