SCR Engineers Ltd. HTAGLD Manuale Utente
P a g e
5
1.2
TAG/IDU/BU communication overview
Tag
Tag initiate sending data
BU500
Data
Ack
Tag
BU initiate sending messages
BU500
Ack
Messa
ge 1
Data
Ack
2
0
m
in
u
te
s
Messa
ge 1 r
etry*
Messa
ge 2
Ack
Tag
IDU
Data
ID Re
q
Optic
RF
Legend:
Only IDU can initiate ID request
*When no ACK from tag
No retries when tag sends data