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We are upgrading a control system for a client whose original system was a dial-up connection between two PLC's. If you can believe it, the only way to reconnect a dropped phone connection was to re-start the man PLC - which controlled the city's water treatment plant!
We are changing the system to use GE-Fanuc's Cimplicity Machine Edition (View HMI component) to connect to the remote PLC. However, we cannot get the dial-up phone line to stay connected for more than 6-8 hours. Something always causes the phone line to hang up.
The client is considering using a leased-line from the local phone company. I'd like to hear from others who have used leased lines in such applications, with ideas on setting up the leased-line modems and other factors to be aware of.
Thanks
Don Zunti. P. Eng.
Delco Automation Canada
www.delcoautomation.com
We are changing the system to use GE-Fanuc's Cimplicity Machine Edition (View HMI component) to connect to the remote PLC. However, we cannot get the dial-up phone line to stay connected for more than 6-8 hours. Something always causes the phone line to hang up.
The client is considering using a leased-line from the local phone company. I'd like to hear from others who have used leased lines in such applications, with ideas on setting up the leased-line modems and other factors to be aware of.
Thanks
Don Zunti. P. Eng.
Delco Automation Canada
www.delcoautomation.com