Siemens SIMATIC Ident System Manual page 30

RF200 system planning
4.1 Fundamentals of application planning
Time constants K and t
Table 4- 1 Typical communication time on the serial interface when operating with presence check
Transfer rate
[baud]
K
[ms]
19200 35
57600 34
115200 26
Table 4- 2
TAG type
All MDS
EEPROM (MDS D1xx/D3xx)
EEPROM (MDS D2xx)
FRAM (MDS D4xx)
In dynamic mode, the values for K and t
communication time only includes the processing time between the reader and the
transponder and the internal system processing time of these components. The
communication times between the communication module and the reader do not have to be
taken into account because the command for reading or writing is already active when the
transponder enters the transmission field of the reader.
The values shown above must be used when calculating the maximum quantity of user data
in dynamic mode. They are applicable for both writing and reading.
30
byte
Read
All MDS MDS D1xx/D3xx
t K
byte
[ms] [ms]
1.08 41
0.59 28
0.56 26
Typical command duration on the air interface for operation without presence check
MDS D2xx
t K
byte
[ms] [ms]
2.66 50
2.28 33
2.17 31
Command K [ms]
Read 20
Write 27
Write 19
Write 27
are independent of the transmission speed. The
byte
System Manual, 09/2013, J31069-D0227-U001-A8-7618
Write
MDS D4xx
t K
byte
[ms] [ms]
8.1 35
7.7 34
7.6 26
T
byte
0.55
2.2
7.5
0.55
t
byte
[ms]
1.08
0.59
0.56
[ms]
SIMATIC RF200