i-MARK 2 / i-MARK 3
USER MANUAL
VISIBILITY DELIVERED. PAGE 14 OF 55
3.3 The Tags
There are 2 types of tags. But the marker function ob both work in the same matter. The difference is
only how the long-range RFID communication works.
3.3.1 The i-B2L Tag (Beacon Technology)
The i-B2L tags steadily transmits a portion of data (17 Bytes) at a configurable rate, typically a few
seconds. In other words the tags RF transmission flashes every several seconds like the light of a
Beacon. This data contains:
Tag information (8 Bytes)
9 Bytes of User Data (pls. see table below)
Byte # Description
1 previous Position Marker ID LSB
2 previous Position Marker ID MSB
3 previous Position Marker Timer LSB
4 previous Position Marker Timer MSB
5 new Position Marker ID LSB
6 new Position Marker ID MSB
7 new Position Marker Timer LSB
8 new Position Marker Timer MSB
9 RSSI of new Position Marker
When a Beacon tag enters a Position Marker’s inductive loop field it rapidly sends out an adjustable
number of RF transmissions every 100 ms. This is called a „burst“. To avoid collisions with other i-B
tags, the 100 ms repeat rate of the burst is slightly randomized. This repeat rate (slot width) is also
adjustable
3.3.2 Surveillance Tag
The i-B2L S/EU-ED-SU is designed to keep the function of i-MARKs and i-PORTs under continuous
surveillance. They are intended to be mounted inside the range of the inductive field of an i-MARK’s
antenna.
Order code. 371 466
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