How The Interfaces Work - Siemens SIMATIC NET IE/AS-INTERFACE LINK PN IO Manual

7 Data Exchange between PROFINET IO Controller and AS-i Slave
7.1

How the interfaces work

Accessing the AS-Interface from PROFIBUS IO
The PROFINET IO controller communicates with the AS-i slaves over the IE/AS-i
LINK. The AS-i communication objects are mapped in one continuous data area
for input data and one for output data on the PROFINET IO controller.
The IE/AS-i LINK operates two interfaces:
Interface to the PROFINET IO controller: PROFINET IO
1.
Interface to the AS-i slaves : AS-Interface
2.
PROFINET IO controller
Cyclic services
Write digital and analog values
Read digital and analog values
Acyclic services
Write analog values with data
record
Read analog values with data
record
Interface to the PROFINET IO controller: PROFINET IO
At the PROFINET end, the cyclic services and the data record interface of
PROFINET IO are used:
S Cyclic services
The cyclic services are used to transfer digital values and analog values.
S Acyclic services
Data records are transferred acyclically and are used to read or write analog
values and parameters. Diagnostic data and error counters can, for example,
also be read. The data record interface is described in Chapter 8.
IE/AS−INTERFACE LINK PN IO
114
IE/AS-i LINK
PROFINET
as of hardware version 1, as of firmware version V2.0
AS-i slaves
Í Í Í
AS-i
Í Í Í
slave 1
Í Í Í Í Î Î Î
Í Í Í Í
Í Í Í Í Í Í Í
AS-i
Î Î Î Í Í Í
slave 2
Î Î Î Î Î Î Î
Î Î Î Î
Î Î Î Î Í Í Í
AS-i
Í Í Í Î Î Î slave n
Î Î Î
AS-Interface
Release 08/2018
C79000−G8976−C216−03