Pepperl+Fuchs AS-I 3.0 PROFIBUS

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26.9.2013

AS-i 3.0 PROFIBUS Gateway in Stainless Steel

Appendix: Example for startup on a Siemens S7

In the structure of the 16 byte I/O data field each AS-i slave has a 4-bit data field.

This is determined by the address of the AS-i slave within the AS-i circuit.

The data for the slaves present and projected in the AS-i circuit are refreshed

based on their position in the I/O data field.

The data fields for non-present slaves are filled with zero.

This means for example the AS-i data for the AS-i slave having Address 12 occu-

py bits 7 - 4 in I/O byte 8 of the controller.

Assignment of the I/O address and AS-i slave address

Address byte Bits 7 - 4 Bits 3 - 0

I/O byte 2 flags slave 1

I/O byte 3 slave 2 slave 3

I/O byte 4 slave 4 slave 5

I/O byte 5 slave 6 slave 7

I/O byte 6 slave 8 slave 9

I/O byte 7 slave 10 slave 11

I/O byte 8 slave 12 slave 13

I/O byte 9 slave 14 slave 15

I/O byte 10 slave 16 slave 17

I/O byte 11 slave 18 slave 19

I/O byte 12 slave 20 slave 21

I/O byte 13 slave 22 slave 23

I/O byte 14 slave 24 slave 25

I/O byte 15 slave 26 slave 27

I/O byte 16 slave 28 slave 29

I/O byte 17 slave 30 slave 31

Tab. 12-29.

Pepperl+Fuchs AS-I 3.0 PROFIBUS - Page 78