User Manual

USER MANUAL –Active RFID Tags
Document No.
Configuration No.
Wavetrend Technologies Ltd
Issue Date
Page
25042002 REV 2.3 User Manual 25
TH
APRIL 2012 11 OF 30
1.7 ActivDuo Tag Functionality
The ActivDuo tag offers three primary modes of operation that determines how often the tag will transmit.
They are defined as being ‘Standard’, ‘Movement Alert’ and ‘Tamper Alert’ transmission modes:
1.7.1 Standard Transmission Mode
In this mode, the tag will transmit its ID number and ancillary data regularly at the programmed status
transmission interval (called the ‘Status Tx rate’).
The default Status Tx rate is one transmission at least every 10 seconds for ActivDuo and one
transmission every 1.5 seconds for Active Tags.
Other transmission can be selected by the user and programmed into the tag through a tag
programmer unit. See the section on tag programming for more information on how to do this.
1.7.2 Movement Alert Mode
In this mode the tag will transmit its data at a shorter alert interval (the ‘Alert Tx rate’) for a short
period of time if the motion sensor within the tag registers movement or vibration.
The default transmission rate for movement alert operation is 1 transmission every 1.5 seconds.
But other alert transmission intervals (0.4 or 0.8 can be selected by the user and programmed into
the tag.
The tag will cease transmitting at the Alert Tx rate after 5 seconds of entering Movement Alert mode
and revert to the Status Tx rate. Each time the motion sensor is activated when the tag is in Standard
mode, the tag will immediately enter the Movement Alert mode.
The movement counter will increment each time the Movement Alert mode is activated.
1.7.3 Tamper Alert Mode
In this mode, triggered by the anti-tamper circuit, the tag will transmit its data, together with setting
the Alarm bit, in a rapid burst of four alert transmissions and in intervals of 0.4 seconds. The tamper
alert mode will interrupt the movement alert mode if a tamper event occurs while the tag is moving.
The tamper counter value will increment each time the Tamper Alert mode is activated.
Status
Tx Rates
Active
Status Tx Rates
ActivDuo
0.4 seconds
10 seconds (default)
0.8 seconds
30 seconds
1.5 seconds (default)
15 seconds
30 seconds
Alert Tx Rates
Active
Alert Tx Rates
ActivDuo
0.4 seconds 0.4 seconds
0.8 seconds 0.8 seconds
1.5 seconds (default) 1.5 seconds(default)