Siemens DP/AS-Interface Link 20E, Руководство пользователя

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Using the Command Interface
119
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
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 Meaning
0 Command number 3E
H
Structure of the Replies in the Receive Buffer
Byte Meaning
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Slave 0 Slave 1 Slave 2 Slave 3 Slave 4 Slave 5 Slave 6 Slave 7
1 Slave 8 Slave 9 Slave 10 Slave 11 Slave 12 Slave 13 Slave 14 Slave 15
2 Slave 16 Slave 17 Slave 18 Slave 19 Slave 20 Slave 21 Slave 22 Slave 23
3 Slave 24 Slave 25 Slave 26 Slave 27 Slave 28 Slave 29 Slave 30 Slave 31
4 Slave 0B Slave 1B Slave 2B Slave 3B Slave 4B Slave 5B Slave 6B Slave 7B
5 Slave 8B Slave 9B Slave 10B Slave 11B Slave 12B Slave 13B Slave 14B Slave 15B
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 reserved
... reserved
13 reserved
For the LPF data, the bit values have the following meaning:
Bit=0: Slave signals no peripheral fault
Bit=1: Slave signals peripheral fault.