2014-
02
90
Commands
Enhanced write words with lock (EL)
Command:
Response:
This command is the same as a normal write command. The data is write-protected at the end
of the write process, provided the tags offer this function. This applies for 13.56 MHz tags of the
type 21, 22, 24, and 33 as well as for LF tags IDC-
…
-1K. Write protection is only activated for
memory blocks involved in the write process. Data can continue to be written to all other
memory blocks.
The read/write head repeatedly attempts to write <WordNum> 32-bit words from the address
<WordAddr> until successful. After each successful write, the head sends the response and
then switches to continuous reading. Then the read/write head reads the same tag until it has
left the detection range or a new tag appears within the detection range. The command then
starts again with write attempts.
The status '05h' is only output when a tag leaves the detection range or is not yet within the
detection range. If two tags enter the read range one immediately after the other, the status '05'
is not issued between the two readings.
Byte
Type
Bit no.
7
6
5
4
3
2
1
0
Byte 0*
Telegram length, high byte
<TelegramLenH>
Byte 1*
Telegram length, low byte
<TelegramLenL>
Byte 2
Command code (48h)
0
1
0
0
1
0
0
0
Byte 3
Word number/Ident
channel/Toggle bit
<WordNum>
<Channel>
<T>
Byte 4
Word address
<WordAddr> (high byte)
Byte 5
Word address
<WordAddr> (low byte)
Byte 6
Data 00h ... FFh
<Data>
Byte 7
Data 00h ... FFh
<Data>
...
Data 00h ... FFh
<Data>
Byte N
1)
Data 00h ... FFh
<Data>
Byte
Type
Bit no.
7
6
5
4
3
2
1
0
Byte 0*
Telegram length, high byte
<TelegramLenH>
Byte 1*
Telegram length, low byte
<TelegramLenL>
Byte 2
Command code (48h)
0
1
0
0
1
0
0
0
Byte 3
Word number/Ident
channel/Toggle bit
<WordNum>
<Channel>
<T>
Byte 4
Status
<Status>
Byte 5
Reply counter
<ReplyCounter>
Byte 6
not used
-
-
-
-
-
-
-
-
Byte 7
not used
-
-
-
-
-
-
-
-
Byte 8
not used
-
-
-
-
-
-
-
-
Byte 9
not used
-
-
-
-
-
-
-
-
Table 7.34
* this byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
1) 4 x <WordNum> + 6
