User's Manual
Table Of Contents
- SIMATIC RF300
- Legal information
- Table of contents
- 1 Introduction
- 2 Safety information
- 3 System overview
- 4 Planning the RF300 system
- 4.1 Fundamentals of application planning
- 4.1.1 Selection criteria for SIMATIC RF300 components
- 4.1.2 Transmission window and read/write distance
- 4.1.3 Width of the transmission window
- 4.1.4 Impact of secondary fields
- 4.1.5 Setup help of the readers of the second generation
- 4.1.6 Permissible directions of motion of the transponder
- 4.1.7 Operation in static and dynamic mode
- 4.1.8 Dwell time of the transponder
- 4.1.9 Communication between communications module, reader and transponder
- 4.2 Field data for transponders, readers and antennas
- 4.3 Installation guidelines
- 4.4 Chemical resistance of the transponders
- 4.5 Guidelines for electromagnetic compatibility (EMC)
- 4.1 Fundamentals of application planning
Planning the RF300 system
4.1 Fundamentals of application planning
SIMATIC RF300
System Manual, 07/2016, C79000-G8976-C345-0x
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4.1.4
Impact of secondary fields
Secondary fields in the range from 0 mm to 30% of the limit distance (S
g
) generally always
exist.
They should, however, only be used during configuration in exceptional cases, since the
read/write distances are very limited. Exact details of the secondary field geometry cannot be
given, since these values depend heavily on the operating distance and the application.
When working in dynamic mode, remember that during the transition from the secondary
field to the main field the presence of the tag is lost temporarily. It is therefore advisable to
select a distance > 30 % of S
g
.
①
Main field
②
Secondary field
Figure 4-3 Gap in the field resulting from secondary fields