User's Manual

Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
5
System
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In unsynchronized commands such as Unsynchronized
Alert, the Reader's receiver must be ON all the time looking
for incoming messages from the seals.
The Reader will set the required mode depending on the
flag's value.
UNSYNC=0 Synchronized mode only.
UNSYNC=1 Unsynchronized mode in use, receiver should
be set to on.
UNSYNC
Burst Messages. This flag indicates whether the alert
messages will be sent following a GET Burst Message or
if the Reader will burst independently with Alert Messages.
BRMSG=0 determines the independent messages burst
mode.
BRMSG=1 indicates the GET Burst Message mode.
ABMSG
5.4 Seal Modes of Operation.
The seal can function in several modes of operation, in accordance
with the application.
5.4.1. Normal Mode.
In the normal mode of operation, the seal is in standby mode most
of the time. When a DataTerminal starts communication, the
transmitted message wakes the seal up.
As explained previously, the method used to establish communication
with the DataReader is different than that used for the DataTerminal.
Using a pre-determined cycle, the seal wakes and performs a channel
monitoring process, searching for the presence of a DataReader. The
frequency of this cycle is notated as Tw. In Normal mode, any event
detected by the seal will be logged in the EVENT Memory.