EUCHNER AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor for 2 AS-i circuits - Manual (Page 164)

164 Subject to reasonable modifications due to technical advances Id.-No.: 103329 Issue date - 24.10.2008 EUCHNER GmbH + Co. KG
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AS-i 3.0 PROFIBUS Gateway with integrated Safety Monitor
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