System Planning Corporation GTLITEV3 Manuale Utente

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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 
 
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