Dwell Time Of The Transponder - Siemens SIMATIC Ident RF340R02 System Manual

4.1.8

Dwell time of the transponder

The dwell time is the time in which the transponder remains within the transmission window
of the reader. The reader can exchange data with the transponder during this time.
The dwell time is calculated as follows:
t :
V
L:
v
Tag
0.8:
The dwell time can be of any duration in static mode. The dwell time must be sufficiently long
to allow communication with the transponder.
The dwell time is defined by the system environment in dynamic mode. The volume of data
to be transferred must be matched to the dwell time or vice versa. As a general rule:
t :
V:
t :
K
or Calculation of the maximum amount of user data
t :
K
K
t
Byte
n
n
max
t
V
SIMATIC RF300
System Manual, 07/2017, C79000-G8976-C345-07
Dwell time of the transponder
Length of the transmission window
: Speed of the transponder (tag) in dynamic mode
Constant factor used to compensate for temperature influence and production toler-
ances
Dwell time of the data memory in the field of the reader
Communication time between transponder and communication module
Communication time between transponder and communication module
Constant; the constant is an internal system time. This includes the time for power
buildup on the MDS and for command transfer
Transmission time for 1 byte
Amount of user data in bytes
Maximum amount of user data in bytes in dynamic mode
Dwell time of the data memory in the field of the reader
Planning the RF300 system
4.1 Fundamentals of application planning
49