User's Manual

Page 12

E Series Data Radio – User Manual

Part C – Applications

(See Part F - Operational Features)

Digipeater Systems

This conﬁguration is used where all sites are required to

communicate via a repeater site. A repeater site is used because it

has a position and/or height advantage and thus provides superior

or extended RF coverage. The radio modem at the repeater does

not have to be physically connected to the application’s master

site. Information from the application’s master is transmitted to the

repeater via radio, and the repeater then relays this information

to the other ﬁeld sites. In this scenario, the repeater is the master

from an RF point of view, and the application master is effectively a

“remote” from an RF point of view, even though it is controlling the

data transfer on the system.

Backbone Store and Forward Systems

Store and forward is used as a way of extending RF coverage by

repeating data messages from one site to another.

This can be done globally using the inbuilt data repeating functions,

or selectively using intelligent address based routing features

available in some PLC/RTU protocols.

In this case it is necessary for all units on the system to operate

Digipeater System

Backbone Store and Forward System