Static/Dynamic Mode; Operation Of Several Readers Within Restricted Space; Dense Reader Mode; Optimizing Tag Reading Accuracy - Siemens SIMATIC RF600 System Manual

RF600 system planning
4.3 Antenna configurations
4.3.7

Static/dynamic mode

Reading or writing can be either static or dynamic.
● Reading/writing is counted as being static if the tag does not move in front of the antenna
● Reading/writing is counted as being dynamic if the tag moves past the antenna during
The following overview shows which environments are suitable for which read or write mode:
Operating mode
Static
Dynamic
4.3.8

Operation of several readers within restricted space

4.3.8.1

Dense Reader Mode

A special operating mode according to the standard EPC Global Class 1, Gen 2 in Dense
Reader Mode allows several RF600 readers to be operated without interference in close
proximity to each other. All RF600 readers operate in Dense Reader Mode according the
standard EPC Global Class 1, Gen 2.
Dense Reader Mode allows physically adjacent readers to use the same frequency when
Gen 2 tags are being used.
Special features for ETSI
In accordance with EPC Global as well as ETSI EN 302 208 V1.3.1, the four transmit
channels are used for transmission with the RF670R, with the RF640R as of firmware
version V1.3, and with the RF620R/RF630R (see section Regulations for UHF frequency
bands in Europe (Page 74)) and the tag response appears on the associated neighboring
channels. As a result of the large difference in level between the transmitter channels and
the tag response channels, this technology provides great advantages for frequency reuse.
However, a prerequisite is that a certain minimum distance, and thus minimum decoupling, is
observed between the antennas of adjacent readers.
4.3.8.2

Optimizing tag reading accuracy

An improvement in the tag reading accuracy in an environment with a high density of readers
can be achieved by aligning the antennas toward the relevant tag field, in other words by
rotating them horizontally and vertically.
In addition, the transmitter power of the readers can be reduced down to the minimum at
which the tags are still just detected accurately.
52
and is read or written.
reading/writing.
Read
Recommended in normal UHF
environments
Recommended under difficult
UHF conditions
System Manual, 05/2012, J31069-D0171-U001-A13-7618
Write
Recommended in normal UHF
environments
Not recommended in difficult
UHF environments
SIMATIC RF600