Siemens SIMATIC RF600 Series System Manual page 50

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
and is read or written.
● Reading/writing is counted as being dynamic if the tag moves past the antenna during
reading/writing.
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 Using more than one reader
When mounting the readers make sure that there is a minimum clearance of 0.5 m between
the readers to avoid them influencing each other.
Avoiding problems
When several RFID readers are used, there is a danger that RFID transponders can also be
read out by other readers. Care must therefore be taken to ensure that the transponder can
only be identified by the intended reader.
Technical disruptions between readers then occur particularly when they transmit on the
same channel (on the same frequency). You will find more detailed information in the section
"The response of electromagnetic waves in the UHF band (Page 56)".
To prevent this, readers used in Europe and China must operate on different channels with
"frequency hopping" activated. "Frequency hopping" is permanently set in the USA.
4.3.8.2 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 transponders are being used.
When mounting the readers, make sure that there is a minimum clearance of 0.5 m between
the readers.
50
Read
Recommended in normal UHF
environments
Recommended under difficult
UHF conditions
System Manual, 10/2016, J31069-D0171-U001-A19-7618
Write
Recommended in normal UHF
environments
Not recommended in difficult
UHF environments
SIMATIC RF600