turck TN-UHF AUS-CDS Series, Инструкция по эксплуатации

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V02.00 | 2020/08
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8.5.8 Command: UHF continuous presence sensing mode
In Continuous presence sensing mode, a user-defined command (write, read, inventory) is sent
to the UHF read/write head and saved in the read/write head. The read/write heads are auto-
matically switched on in Continuous presence sensing mode as soon as a tag is located in the
detection range. The duration of the scan interval and the on time can be adjusted in the set-
tings of the UHF read/write head. The command is continuously executed until the user termin-
ates Continuous presence sensing mode by executing a reset command.
NOTE
The reset command resets all read data.
Read/write heads in Continuous presence sensing mode send all command related data to the
interface. The data is stored in the buffer of the interface and can be queried by the controller
via the
Get data from buffer command. In Continuous presence sensing mode the Tag in
detection range signal is not permanently updated.
Request
Loop counter See description of the output data, [
}
156]
Command code 0x0020 (hex.), 32 (dec.)
Read/write head address See description of the output data, [ } 156]
Length of EPC Not required
Start address 0: Grouping inactive
1: Grouping active
>1: Not defined
Length Not required
Command timeout Not required
Write fragment no. 0
Read fragment no. See description of the output data, [ } 156]
Write data Not required
Response
Loop counter See description of the input data, [ } 152]
Response code 0x0020 (hex.), 32 (dec.)
Length Not required
Error code See description of the input data, [ } 152]
Tag within the
detection range See description of the input data, [ } 152]
Data (bytes) available Increases during command execution
Tag counter Increases with each read or written EPC
Write fragment no. 0
Read fragment no. See description of the input data, [ } 152]
Read data See description of the input data, [
}
152]