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Siemens SIMATIC RF300 System Manual Page 33

Simatic sensors.
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Table 4- 4
RF380R reader transmission window and read/write distance
S
:
Operating distance between transponder and reader
a
S
Limit distance (maximum clear distance between upper surface of the reader and the transponder, at which the
g
transmission can still function under normal conditions)
L
Length of a transmission window
The length L
is valid for the calculation. At S
D
M
Field centerpoint
The transponder can be used as soon as the intersection (SP) of the transponder enters the
area of the transmission window.
From the diagrams above, it can also be seen that operation is possible within the area
between S
shrinks to a single point at distance S
between S
SIMATIC RF300
System Manual, 01/2009, A5E01642529-03
a,min
and S
. The active operating area reduces as the distance increases, and
a
g
and S
.
a
g
4.1 Fundamentals of application planning
, the field length increases from L
. Only static mode should thus be used in the area
g
RF300 system planning
to L
.
D
max
33

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