Continuous Hf Bus Mode - Data Retrieval; Led Displays On Read/Write Heads In Hf Bus Mode - turck TBEN-RFID Series Technical Support Document

Operation
5.5 Continuous HF bus mode — Data retrieval
All activated read/write heads are triggered within a time frame of bypass time + 10 ms. Within
this time frame, the set command (e.g. inventory, read, write) is processed in Continuous mode.
While a command is being executed by all activated read/write heads, only one read/write
head sends data to the RFID interface. The other read/write heads store the read data for sub-
sequent retrieval. When a new tag is detected by the same read/write head, any data in the buf-
fer of the read/write head that has not yet been transferred to the RFID interface is overwritten.
During the time between two requests and when sending data to the RFID interface, the read/
write heads do not recognize any tags. The required waiting times are given in the following
table:
Command
Inventory
Read
Write
By default, the bypass time in HF bus mode is 48 ms.
The following table shows when commands are executed (CMD) and data is exchanged (DATA).
CMD: Command is being executed.
n
DATA: Data is being exchanged.
n
DATA or CMD: If data is stored on the read/write head, the data is sent to the TBEN module. If
n
no data is stored on the read/write head, the command is executed.
Read/write Sequence 1
head
Address 1 DATA None
or CMD Action
Address 2 CMD None
Action
Address 3 CMD None
Action
Address n CMD None
Action
Time Bypass time Waiting
time
5.6

LED displays on read/write heads in HF bus mode

In HF bus mode, the LEDs on the read/write heads have the following display functions:
LED
Green
The yellow LED has no specific function in HF bus mode.
16
Sequence 2
CMD None
Action
DATA None
or CMD Action
CMD None
Action
CMD None
Action
Bypass time Waiting
time
Condition
Flashes 3x, 0.5-s break
(recurring)
Flashing (1 Hz)
Hans Turck GmbH & Co. KG | T +49 208 4952-0 | F +49 208 4952-264 | more@turck.com | www.turck.com
Waiting time
15 ms
25 ms
35 ms
Sequence 3 Sequence n
CMD None CMD
Action
CMD None CMD
Action
DATA None CMD
or CMD Action
CMD None DATA
Action or CMD
Bypass time Waiting Bypass time Waiting
time
Function
Incorrect read/write head address or no
read/write head address assigned
Read/write head not activated
None
Action
None
Action
None
Action
None
Action
time