User's Manual

GlobalTrak ™ GT Lite Operation and Maintenance Manual
(2) DSP: Return to previous function
4) ZB: If connectivity flag = False
a) ZB: Declare node as router
b) ZB: Join Available network
c) ZB: If no network is available
i) ZB: Go to sleep
ii) DSP: Return to previous function
d) ZB: If network is available
i) DSP: If messages queued
(1) DSP: Pass ZigBee module pending messages
(2) ZB: Transmit messages to coordinator
(3) ZB: If messages transmitted to coordinator success
(a) DSP: Purge messages from queue
(b) DSP: Return to previous function
(c) ZB: Remain awake for remaining ZBT seconds
(d) ZB: Go to sleep
ii) DSP: If no messages queued
(1) DSP: Return to previous function
(2) ZB: Remain awake for ZBT seconds
(3) ZB: Go to sleep
RFID Operation
GT Lite may also be equipped with active or passive RFID technology. Reads can be initiated
by events or periodic timers. For more information about RFID options, please consult
Section XXXXXXXXX.
Device to Server Message Description
Device to Server messages are originated at the device and transmitted to the server. All
messages are transmitted by adding the message to the transmit queue and waiting for the
next transmit attempt. Some messages, including events, are immediately transmitted by
initiating transmission after the message is placed on the queue. The messages are defined
here.
Logger Message
Logger messages are the standard method of communicating data to the IMB. They are
created and sent either on a configurable reporting interval or immediately following an
event.
Prepared: R. Straz Date: July 25, 2007 Page 36 of
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