Parameter assignment and configuration
4.5 Transponder addressing
Communications module RF120C with application blocks for S7-1200 and S7-1500
Operating Instructions, 07/2013, C79000-G8976-C328-01
43
System
Addressing
16-bit hexadecimal number
Integer
Start address
End address
0000
FEFC
+0
–
ID no.: (fixed-coded; can only be output as a whole)
Start address
Length
FFF0
0008
-16
+8
RF300: General notes on the meaning of the OTP memory
RF300 tags and ISO tags have a memory area that can be protected against overwriting.
This memory area is called OTP. Five block addresses are available for activating the OTP
function:
●
FF80, FF84, FF88, FF8C and FF90
A write command to this block address with a valid length (4, 8, 12, 16, 20 depending on the
block address) protects the written data from subsequent overwriting.
Note
OTP writing/locking should only be used in static operation.
Note
Use of the OTP area is not reversible
If you use the OPT area, you cannot undo it, because the OPT area can only be written to
once.
