User Manual

Chapter 6 System Overview
- 74 - Hi-G-Tek Ltd. Micro electro nic s & A sset Tra cking Techno logy
DataReaders must be properly placed to ensure there are no dead zones
within the defined area. Overlaps should be as shown in the above drawing.
DataReader's Receiving Zone is the term used to describe the area of
reliable communication covered by a DataReader. T he DataReader's
Receiving Zone is also called a Cell. As the drawing illustrates, it is
extremely important that the application software controls and synchronizes
the DataReader’s operation in order to avoid RF collisions. In other words,
the application software has to make sure that no two DataReaders with
overlapping Receiving Zones transmit at the same time.
6.4.2.2 Line Comm unication RS-485 Layout
The connection of many DataReaders to a controlling computer is done via
the RS-485 protocol. Up to 32 DataReaders may be connected to one serial
Reader Zo ne