System communication

System bus

The system bus interconnects the process stations,

operator stations and engineering station in the

Freelance 800F system.

The system bus complies with the Ethernet Standard

according to DIN/ISO 880 , Part  (IEEE 80 . ) and

can be used with twisted pair, fiber optic or coaxial

cable. It is also possible to use a combination of

these standards or to implement 100-MBit/s compo

nents within a network as high-speed backbone.

Freelance uses confirmed and unconfirmed services.

The unconfirmed UDP service is used for screen up

dating and lateral communication between controllers.

The confirmed TCP/IP service is used for alarming

and trend archiving.