User's Manual

BL ident System – Planning
2 – 6 D101583 0207 BL ident
 The read-write head contacts the data carrier when it is entering
the transfer zone: This takes about 2.7 ms.
 With the second contact to the data carrier the read-write head
recognizes the data carrier. A signal is sent to the interface
module: Duration about 12 ms.
 The interface module sends a read-write command, e.g. read 4
bytes, incl. version and feedback of the data on the interface
module: Duration about 7 ms.
This results in total to about 22 ms.
Until 4 bytes of data have been processed by the interface module
takes about 5 ms/byte.
This means when the data carrier passes the read-write head, a
max. of 8 bytes can be read or written.
Minimum distances between two adjacent data carriers
The minimum distance between two data carriers is dependent on
the size of the data carrier and the read-write head.
In dynamic operation (on the fly) the minimum distance is still
dependent on the data quantity and the bus cycle time.
Note
With the BL ident configurator at www.turck.com different operating
states in dynamic operation can be simulated and represented.
Note
Corresponding tests for determination of the minimum distance
should be undertaken before commissioning.