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
SIMATIC RF300
System Manual, 07/2016, C79000-G8976-C345-0x
37
Planning the RF300 system
4
4.1
Fundamentals of application planning
4.1.1
Selection criteria for SIMATIC RF300 components
Assess your application according to the following criteria, in order to choose the right
SIMATIC RF300 components:
● Transmission distance (read/write distance)
● Tracking tolerances
● Static or dynamic data transfer
● Data volume to be transferred
● Speed in case of dynamic transfer
● Metal-free rooms for transponders and readers
● Ambient conditions such as relative humidity, temperature, chemical impacts, etc.
4.1.2
Transmission window and read/write distance
The reader generates an inductive alternating field. The antenna field is largest near to the
reader. The size of the field decreases strongly the further away from the reader. The
distribution of the antenna field depends on the structure and geometry of the antennas in
the reader and transponder.
For the transponder to function correctly, a minimum field strength at the transponder must
be achieved at a distance S
g
from the reader or the antenna. The figures below show the
transmission window between transponder and reader or between transponder and antenna: