Siemens CP 243-2 installation instructions GetLPF

Command Interface

5.2.27Get_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

Bank Byte

20

21

Meaning

Command number 3E H

AS-i slave address

Structure of the Job Data in the Receive Buffer

Bank

2

2

2

2

2

2

2

2

2

2

Byte				Meaning
	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
0			Echo of the command number 3E H
1				Command status
2	slave 0	slave 1	slave 2	slave 3	slave 4	slave 5	slave 6	slave 7
3	slave 8	slave 9	slave 10	slave 11	slave 12	slave 13	slave 14	slave 15
4	slave 16	slave 17	slave 18	slave 19	slave 20	slave 21	slave 22	slave 23
5	slave 24	slave 25	slave 26	slave 27	slave 28	slave 29	slave 30	slave 31
6	reserv.	slave 1B	slave 2B	slave 3B	slave 4B	slave 5B	slave 6B	slave 7B
7	slave 8B	slave 9B	slave	slave	slave	slave	slave	slave
			10B	11B	12B	13B	14B	15B
8	slave	slave	slave	slave	slave	slave	slave	slave
	16B	17B	18B	19B	20B	21B	22B	23B
9	slave	slave	slave	slave	slave	slave	slave	slave
	2B4	25B	26B	27B	28B	29B	30B	31B
The bits in the LPF data have the following meaning:
Bit=0:		Slave signals no peripheral fault
Bit=1:		Slave signals peripheral faults

SIMATIC NET CP 243-2 AS-i Master	5-53
C79000-G8976-C142/02