turck TBEN-RFID Series - Possibilities for Command Execution in HF Bus Mode

Operation
Possibilities for command execution in HF bus mode
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07.00 | 2022/09 | 226
9.7 Possibilities for command execution in HF bus mode
There are three ways of querying the UID in HF bus mode.
n Using HF bus mode in Idle
n Using HF bus mode with any command
n Use HF Continuous bus mode with Inventory, Read or Write
The following tables describe the benefits of the particular applications.
Application Functions Notes
Using HF bus mode
in Idle Mode
Inventory and/or
Read
n No command via the controller required
n UID and/or data with read/write head ad-
dress is automatically displayed in the input
data.
n If the cycle time of the controller is the
longer than the time until a new tag is in the
detection range of a read/write head: Data
loss possible.
n Grouping of UIDs or user data only possible
via the controller
n Read/write heads are active in succession
Using HF bus mode
with any command
n Commands must be sent to a read/write
head individually.
n UID or data are displayed in the input data.
n Can only be used for static applications be-
cause only one read/write head can execute
a command.
n Grouping of UIDs or user data only possible
via the controller
n No overwriting of data: Only one read/write
head performs the particular command.
n Fragmenting of the data possible (max.
128bytes per fragment)
Use HF Continuous
bus mode with In-
ventory, Read or
Write
n The command must be activated once by
the controller. The read/write heads then
execute the command simultaneously and
continuously.
n The read data is stored with the read/write
head address in the 16 Kbyte ring memory
of the RFID module
n The Read buffer (Cont. Mode) command
transfers the data to the controller.
n The bus cycle time in Continuous Mode
must be shorter than the time until a new
tag is in the detection range of the same
read/write head. If a tag enters the detec-
tion range of a different read/write head,
this has no effect.
n Grouping in the RFID interface possible as
long as the data was not yet sent to the con-
troller
n All read/write heads are activated and save
data (max. 64bytes per read/write head.