User's Manual

OS2400 Radio Module Exhibit 21: User Manual 3 FCC ID: OQ7OS2400
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POINT-MULTIPOINT
In Point-Multipoint networks one Master Radio is in communication with at least two
Remote Radios. The Remotes can only communicate with their Master. Remotes
cannot communicate with each other directly, the data must be passed through the
Master. For this reason, a Point-Multipoint network will not work with an application
which requires peer to peer communication.
The OS2400 Point-Multipoint network can only be used with devices that are designed
to use the Modbus communication protocol. In a Modbus network each device has its
own Modbus address. In the network configuration process, each radio’s address must
be correlated with the Modbus address of the device cabled to it.
It may be that the data throughput rate is not as high as in a point-to-point network. In a
point-to-point network the data path is predefined. There are no choices. There is only
one destination. In a point-multipoint network the destination must be determined, the
address information must be resolved before the transmission can proceed.