Pepperl+Fuchs IDENT-I system P IPT FP Series Manual page 39

IPT*-FP WITH U-P6-B5-V
Operation on the INTERBUS
Protection word
Bit
0 ... 7
8 ... 15
16 ... 23
24 ... 31
With the control and protection word, it should be noted that when communicating a word, the
highest value byte is transferred first and the lowest value byte last. With the entry of the read
and write-protected words, the words are counted as follows:
00
01
02
03
04
...
1F
IPC03 password mode
It is possible to protect the control word and the protection word from being overwritten. Then
the configuration can no longer be changed. The password mode serves this purpose.
With password mode active in the data carrier, the data range of a data carrier can only be read
or written after the correct password is sent to the data carrier from the read/write head. The
following must apply for this:
• The correct password is set once with the command PS "set password" and
• the password mode is activated with the command PM "set password mode" .
The password in the read/write head and on the data carrier can be changed with the
command PC.
If the password mode is deactivated, every word on the data carrier can be read and written as
necessary.
In the factory default condition of the read heads and the data carrier IPC03, the password is
00000000
h
IPC03 in a non-volatile manner.
"Default read"
In the "default read" operating mode 1 or 2, words can be read very quickly, because the
memory to be read is already defined on the data carrier and does not need to be
communicated to the data carrier from the read/write head first.
Meaning
First read-protected word
Last read-protected word
First write-protected word
Last write-protected word
. In the read head, the password is stored in a volatile manner and in the data carrier
Byte
0
1
2
3
Password
Protection word
Control word
1. Data word
2. Data word
...
29. Data word
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