Rf300 - Siemens SIMATIC RF300 System Manual

RF300 system planning
4.1 Fundamentals of application planning
Time constants K and t
Table 4- 5 Static mode
Transfer rate
[baud]
Data volume
≤ 233 bytes
K
[ms]
19200 28
57600 15
115200 11
The values for K and t
byte
several different times:
Serial communication between communication module, reader and

Processing time between reader and transponder and their internal processing time.

The values shown in the table must be used when calculating the maximum quantity of user data in static mode. They are
applicable for both reading and writing in the FRAM area.
For writing in the EEPROM area (max. 20 bytes), the byte time t
Table 4- 6
Independent
Independent
Write
Read
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.
38
for medium and high-performance applications
byte
RF300 mode
FRAM
Read/write
Data volume
>233 bytes
t K
byte
[ms] [ms]
0.67 28
0.30 25
0.21 30
include the overall time that is required for communication in static mode. It is built up from
Dynamic mode
Transfer rate Memory area
[baud]
FRAM
EEPROM
Read
Data volume
≤ 233 bytes
t K t
byte byte
[ms] [ms] [ms]
0.67 35 1.08
0.22 34 0.59
0.12 26 0.56
is approx. 11 ms.
Byte
RF300 tags
K [ms]
8
8
8
are independent of the transmission speed. The
byte
System Manual, 11/2009 - Zwischenstand 17.09.2009, A5E01642529-04
ISO mode
Data volume Independent of data
>233 bytes
K t K
byte
[ms] [ms] [ms]
64 0.75 41
34 0.59 28
26 0.56 26
ISO tags
t [ms] K [ms]
byte
0.13 -
12.20 15
0.13 12
Write
volume
t
byte
[ms]
2.66
2.28
2.17
t [ms]
byte
-
1.99
0.56
SIMATIC RF300