Siemens SIMATIC RF310M Operating Instructions Manual page 46

SIMATIC RF310M software
8.5 The functions in the "Tag" menu
What to do
1. Select "Tag > Write OTP".
2. Confirm the confirmation prompt "Caution! Switch on permanent write protection?" with
"Yes!".
The data displayed in the data editor is then transferred to the tag.
Result
The data is identified on the tag as being no longer writable.
In the data editor, the protected areas following a read operation are displayed in gray.
Note
OTP memory areas of the RF300 and ISO tags
For OTP memory areas of the RF300 tags, see the System Manual RF300, RF300/ISO
transponders, memory configuration of the RF300/ISO tags.
Only complete rows with 4 bytes each are write-protected.
If, for example, you only select the 2nd byte in the data editor using the "Address" FF05 and
"Length" 1, only this byte is transferred to the EEPROM area on the tag, but the address
range FF04...FF07 is protected.
A write operation is carried out internally at block address FF84.
The OTP area refers to the 5 block addresses 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
If the OTP area is used, it must be ensured that the blocks are used without gaps, starting
with block 0.
Examples:
3 blocks (with write command), Block 0, 1, 2 (FF80, length = 12): valid
2 blocks (consecutive), Block 0 (FF80, length =4), Block 1 (FF84, length = 4): valid
2 blocks (consecutive), Block 0 (FF80, length =4), Block 2 (FF88, length = 4): invalid
1 block, Block 4 (FF90, length = 4): invalid.
46
Operating Instructions, 10/2013, J31069-D0191-U001-A6-7618
SIMATIC RF310M Mobile Reader