Get_Lpf - Siemens DP/AS-Interface Link 20E Manual

3.3.27

Get_LPF

Purpose
With this call, the list of peripheral faults (LPF) signaled by the AS-i slaves is read
out from the AS-i master. The LPF is updated cyclically by the AS-i master.
Whether and when as AS-i slave signals faults of the attached peripherals (for
example wire break) can be found in the description of the AS-i slave.
Structure of the Job Data in the Send Buffer
Byte
0
Structure of the Replies in the Receive Buffer
Byte
Bit 7 Bit 6
0 Slave 0 Slave 1
1 Slave 8 Slave 9
2 Slave 16 Slave 17
3 Slave 24 Slave 25
4 Slave 0B Slave 1B
5 Slave 8B Slave 9B
6 Slave 16B Slave 17B Slave 18B Slave 19B Slave 20B Slave 21B Slave 22B Slave 23B
7 Slave 2B4 Slave 25B Slave 26B Slave 27B Slave 28B Slave 29B Slave 30B Slave 31B
8
...
13
For the LPF data, the bit values have the following meaning:
Bit=0: Slave signals no peripheral fault
Bit=1: Slave signals peripheral fault.
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
Meaning
Command number 3E
Meaning
Bit 5 Bit 4
Slave 2 Slave 3 Slave 4
Slave 10 Slave 11 Slave 12
Slave 18 Slave 19 Slave 20
Slave 26 Slave 27 Slave 28
Slave 2B Slave 3B Slave 4B
Slave 10B Slave 11B Slave 12B Slave 13B Slave 14B Slave 15B
reserved
reserved
reserved
Using the Command Interface
H
Bit 3 Bit 2 Bit 1
Slave 5 Slave 6
Slave 13 Slave 14
Slave 21 Slave 22
Slave 29 Slave 30
Slave 5B Slave 6B
Bit 0
Slave 7
Slave 15
Slave 23
Slave 31
Slave 7B
119