Siemens Simatic Ident Function Manual page 115

System
RF300: General notes on the meaning of the OTP memory
RF300 transponders and ISO transponders have a memory area that can be protected
against overwriting. This memory area is called OTP. The following 5 block addresses are
available for activating the OTP function:
● 0xFF80
● 0xFF84
● 0xFF88
● 0xFF8C
● 0xFF90
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
Using the OTP area only in static mode
Only use the OTP area in static mode.
Note
Use of the OTP area is not reversible
If you use the OPT area, you cannot undo this assignment, because the OPT area can only
be written to once.
Ident profile and Ident blocks, standard function for Ident systems
Function Manual, 10/2018, C79000-G8976-C387-04
Addressing
Start address
End address
R/W memory (FRAM)
Start address
End address
ID-Nr.: (fixed-coded; can only be output as a whole)
Start address
Length
Setting parameters for blocks
3.6 Transponder addressing
16-bit hexadecimal number
0xFF00
0xFF13
0x0000
0xFEFC
0xFFF0
0x0008
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