The Marker Functions In Detail; The Marker Tag And The Inductive Loop; Marker Tag Appears In Position Marker's Loop Field; Marker Tag Remains In Position Marker's Loop Field - IDENTEC SOLUTIONS i-MARK 2 Installation And Hardware Manual

4 THE MARKER FUNCTIONS IN DETAIL

4.1 The Marker tag and the inductive loop

1.1.1. Marker tag appears in Position Marker's loop field

Whenever a tag recognizes a new Position Marker's inductive loop it does this:
 Move values of new ID and timer to previous ID and timer
 Stop and reset new timer to "0"
 Re-Start timer for previous timer value
Additionally an i-B tag or an i-Q350 tag in beacon mode will send a configurable burst of RF
communication.

1.1.2. Marker tag remains in Position Marker's loop field

When a tag remains in a Position Marker's loop it does this:
 New timer remains stopped
 Previous timer counts up every second

1.1.3. Marker tag leaves Position Marker's loop field

When the tag finally leaves the current inductive loop, then it does this:

Start new timer, counts up every second
 Old timer remains counting up
The tag decides to have left the loop field after he hasn't recognized the same Position ID for more
than 1 sec. This inhibit time avoids lost of previous Position information for short time of interrupted
recognition of the loop field.

4.2 About Timer Values

The timers are 16 bits wide and count up every100 milliseconds. After a timer has reached it's
maximum value of 0xFFFF or 6553,5 seconds, it stops. So the maximum time is: 1 h, 49 m, 13.5 s.

4.3 About the RSSI

This value of the signal strength of the inductive loop that is recognized by the tag, is the maximum
field strength the tag has discovered while having been in a specific loop field.
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