Pepperl+Fuchs IC-KP-R2-V1 Manual page 34

IC-KP-R2-V1
Commands
IPC03 password mode
If the password mode in the data carrier is activated, the data range of the data carrier is read
and write-protected and can only be read or written if the R/W head sends the correct
password to the data carrier.
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.
Set password mode (PM):
Command:
Response:
The command PM activates and deactivates the password mode of the relevant channel. In the
password mode, the password is transferred to the data carrier before each read/write access.
If a data carrier is addressed with the wrong password, then even the other data areas on the
data carrier can no longer be accessed.
Password mode "off":
Password mode "on":
Change password (PC):
Command:
Response:
The command PC changes the password in a tag. Enter the old and then the new password
<PSW> here. If the password has been successfully written, the password in the read/write
head also changes and the set password command is no longer required. The password of
the IPC03 can also be changed if the password mode is deactivated.
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PM <Ident channel><P><CHCK><ETX>
<Status><Ident channel><CHCK><ETX>
<P>=0 (0b) (deactivated)
<P>=1 (1b) (activated)
PC <Ident channel><OldPW><NewPW><CHCK><ETX>
<Status><Ident channel><CHCK><ETX>