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5-2
Section
Communications Sequences
67
In the following example, the POLLING AUTO command is executed to two
Controllers.
Host device
POLLING AUTO
command to node 1
Response received
POLLING AUTO
command to node 2
POLLING
subcommand inquiry
to node 1
Controller
(Node 1)
Response
(Waiting for ID Tag)
Tag
Not in range
Controller
(Node 2)
Response
(Waiting for ID Tag)
Tag
Not in
range
Response received
Response
Response received
Passed
POLLING
subcommand inquiry
to node 2
Not in range
response
Response received
Not in
range
(Waiting for ID Tag)
Communications
processing
Tag
POLLING
subcommand inquiry
to node 2
Not in range
response
Response received
Not in
range
(Waiting for ID Tag)
Not in range
response
Response received
POLLING
subcommand inquiry
to node 2
1, 2, 3...
1. The host sends the POLLING AUTO command to node 1.
2. After the command is received, the Controller returns a response to the host
indicating the acceptance of the command.
3. The host sends the POLLING AUTO command to node 2.
4. After the command is received, the Controller returns a response to the host
indicating the acceptance of the command.
5. The host can use subcommands to check the process of command execu-
tion or cancel the execution of the POLLING AUTO processing. If the ID Tag
has not arrived yet, a response indicating the status is sent in reply to an in-
quiring subcommand.
6. When the ID Tag passes through the communications area of node 1’s An-
tenna, communication is established.
7. If a subcommand is sent for confirmation to the Controller that has finished
processing communications with the ID Tag, the Controller will return a re-
sponse of a process result.
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