Function description
Operating Manual PIT m4SEU
1004648-EN-02
| 32
Bit27 ... Bit24 Bit23 ... Bit16
Bit07 ... Bit00
Consecutive number
Key Mode Bit27 Bit26 Bit25 Bit24
01
0
0
0
1
1
D
02
0
0
1
0
2
D
03
0
0
1
1
3
D
04
0
1
0
0
4
D
Service
1
1
0
1
13
D
Bit15 ... Bit08
0 ... 15
D
0 ... 9999999
D
Fig.: Structure of the Key ID number
Examples:
1101
0000 0000
0010 1100
Consecutive number: 44
D
0000 0000
Key Mode Service
Key-ID-Number: 130000044
0010
0000 0000
1111 1110
Consecutive number: 510
D
0000 0001
Key Mode 02
Key-ID-Number: 020000510
5.6.2
Communication mode for downloading the Key ID number
The unique Key ID number for the relevant transponder key is downloaded to the higher-
level process controller using a defined protocol, depending on the coded communication
mode. The communication mode is coded on the Key ID interface of the PIT m4SEU (jump-
ers available/not available).
The PIT m4SEU detects the coded communication mode at each power-on. As long as
voltage is applied to the PIT m4SEU, the coded communication mode will be active; i.e. the
change in communication mode does not come into effect until the supply voltage is
switched off and then on again.
It is possible to choose between the following communication modes:
}
Transmitter-controlled communication mode
}
Handshake-controlled communication mode
}
Advanced communication mode
