OBID
®
System-Manual
ID RW40.30-USB
FEIG ELECTRONIC GmbH
Page 40 of 57
H80701-2e-ID-B.doc
4.2.ID-Number (not ID CTx.A)
The ID-Number has a max. length of 12 bytes. Thus, it is possible to display a 24 digit BCD number
which can be used in different formats. It will be stored in a special area of the transponder and is
secured by encoding in order to avoid listening and copying on another transponder. Next to the actual
ID-Number the desired length of the output has to be stated in form of bits. If the ID-Number is put out
by the data-/clock interface, the output will be effected with the exact amount of bit which has been
defined by the IDL value.
In order to increase the user's safety, the ID-Number will be stored inside of a storing area which can
be switched to read-only mode after the programming of the ID-Number. This way intentional and
unintentional deleting or changing of the ID-Number will be avoided effectively.
Basic structure of an ID-No.
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
Content
IDL
max. 12 Byte ID-No.
IDL: (0...96)
Defines the length of the user-information of the ID-No. in bit. While the ID-No. is being read,
this will be put out in the length defined by IDL. Especially important for the output of an ID-
No. via the data-/clock interface is the parameter IDL.
ID-No.:
The ID-No. is a data field of max. 12 byte length, where any data may be stored. The function
of IDL has to be noted.
Function Example of IDL and ID-No.:
write ID-No.
read ID-No.
IDL
ID-No
asynchronous interface
data-/clock interface
16
12 34 56
0001 0010 0011 0100 0101 0110
12 34
0001 0010 0011 0100
12 34
0001 0010 0011 0100
17
12 34 56
0001 0010 0011 0100 0101 0110
12 34 56
0001 0010 0011 0100 0101 0110
12 34 x
0001 0010 0011 0100 0
