20
13
-0
4
46
Commands
If the password mode in the data carrier is deactivated, every data word on the
data carrier can be read or written.
The default password of the R/W heads and the data carrier is 00000000h. In the
R/W head, the password is stored in the volatile memory and in the data carrier,
the password is stored in the non-volatile memory.
To read or write the "Protection Word" and the "Control Word", you must first enter
the password in the password mode (see the commands
SC
or
EC
).
You can also limit access to the data carriers by defining the start and end of a
read-protected and a write-protected range in the Protection Word.
Setting the password
1. Enter the correct password once with the command
PS
(set password).
2. Activate the password mode with the command
PM
(set password mode).
The password in the R/W head and on the read/write tag can be changed with the
command
PC
.
If the password mode is deactivated, every data word on the read/write tag can be
read and written as necessary.
To read and write the words 1
“
Protection Word
”
and 2
“
Control Word
”
, the correct
password is always required and therefore the password mode must be active
(see the commands
SC
or
EC
).
In addition, the access to the read/write tag can be limited via read- and write-
protected ranges. To achieve this, each mutually independent start and end of a
read-protected and a write-protected range can be defined in the "Protection
Word".
In the factory default condition of the reading heads and the read/write tag IPC03,
the password is 00000000h. In the reading head, the password is stored in a
volatile manner and in the read/write tag IPC03 in a non-volatile manner.
