Siemens SIMATIC RF685R User Manual

RF600 system planning
4.3 Antenna configurations
SIMATIC RF600
50 System Manual, 11/2018, J31069-D0171-U001-A21-7618
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 55)".
4.3.8.2 Optimization of robustness of tag data accesses for readers that are operated
simultaneously
Parameter data access reliability
If several readers are to be operated simultaneously in an environment, then the following
settings affect the reliability of the reader's access to transponder data:
● Electromagnetic environment (see section "The response of electromagnetic waves in the
UHF band (Page 55)")
● Type of transponder (see section "Transponder (Page 333)")
● Number of transponders to be detected by an antenna at a time
● Type of antenna (see section "Antennas (Page 205)" and section "Guidelines for
selecting RFID UHF antennas (Page 51)")
● Transponders' distance from and orientation to antennas (see section "Transponder
(Page 333)")
● Distances and orientation of antennas of different readers to each other
● Radiated power of antennas
The robustness of transponder data access is improved for readers whenever distances to
adjacent readers are increased, radiated power is reduced, and a channel plan (for ETSI
readers) is implemented. Adjacent readers are parameterized in the channel plan in such a
way that they do not use the same channels.
A channel plan can be created for ETSI and CMIT readers; for FCC readers, it is assumed
that the probability of two readers accidentally using the same channel is very low.

Siemens SIMATIC RF685R Specifications

General

Brand	Siemens
Model	SIMATIC RF685R
Category	Rfid Systems
Language	English