Features - ICP DAS USA FRB-200U User Manual

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1.1 Features

The Token stream is used to activate data transmission from the specified
SA node to the corresponding RA nodes.
The Network Manager is defined as SA0. Each of FRnet must have SA0
because it issues the Token stream into the network.
The Token stream is produced cyclically by the hardware system (SA0) at
the fixed time interval, see Figure 1.1. Therefore, the FRnet system can
provide both the isochronous and deterministic functionalities.
It can provide data transmission from one node (16-bit) to a multi-node at
the same time because FRnet uses the principle of delivering the data from
the sender address to the receiver address. This means, the sender
address must be unique, but the receiver address can be different or the
same in the network.
The FRnet system can be easily extended by adding new modules to the
network according to the FRnet principle.
Device Inter-communication: A single device can talk to other devices by
setting appropriate SA and RA node configurations.
Adopt Memory-mapping technology to control I/O nodes.
No software overhead: all data transmissions are performed automatically
via the FRnet control chips. Therefore, there is no need for the CPU or
firmware to process transmission protocols.
It only needs simple RS-485 wiring.
OS (operation system) independent.
FRB-200U/200/100 User Manual (Ver.1.3, Jun.2008, fmh-001-12) ----- 6