Siemens Simatic RF300 System Manual page 55

Note
Setting outside the range
Settings outside the specified range (02 ... 08) have the effect that the default value (1.25 W)
is set. In this case for reasons of compatibility there is no error message.
This setting is not necessary with the RF380R readers of the 2nd generation (6GT2801-
3BAx0) because the power limits are optimized automatically depending on the reader-
transponder distance. For reasons of compatibility this setting can nevertheless be made.
Note that the values "02", "03" and "04" bring about a reduction of the power of
approximately 50%.
You will find more information on this subject in the chapter "Minimum clearances (Page 64)"
section "Minimum distance from reader to reader".
See also
Product Information "Input parameters for the RF300 system for programming via
communications modules" (https://support.industry.siemens.com/cs/ww/en/ps/15033/man)
SIMATIC RF300
System Manual, 07/2017, C79000-G8976-C345-07
4.2 Field data for transponders, readers and antennas
Planning the RF300 system
55