Application Planning
3.4 Planning effective ranges
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
47
Distance measurement between HMI device and transponder
The transponder transmits its ID in lobe-shaped area with a maximum range of approx. 8
meters. The following example shows the varying quality of the effective range based on a
configuration in which a maximum range of x
1
= 8 m has been specified.
[
[
[
[
[
\
①
Zone with poor quality effective range
②
Zone with good quality effective range
③
The effective range quality along the line is 100%.
The effective range quality is best in the middle of the lobe-shaped area: the effective range
quality along the white line is 100%. The effective range quality decreases along the lobe's
center line in the direction of each edge.
There is a zone of poor quality effective range (marked yellow) both directly at the
transponder as well as at the other end of the lobe. At the long side of the lobe there is a
direct transition of the effective range quality from "good" to "no effective range detected".
You can find an exact description of the radiant characteristics of the HMI device and
transponder in specifications section of the operating instructions.
Transponders must be mounted in the system in such a manner that the planned effective
range is covered by the transmitting range of the transponders assigned to it.