7 Data Exchange between PROFINET IO Controller and AS-i Slave
114
IE/AS−INTERFACE LINK PN IO as of hardware version 1, as of firmware version V2.0
Release 08/2018
C79000−G8976−C216−03
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:
1.
Interface to the PROFINET IO controller: PROFINET IO
2. Interface to the AS-i slaves : AS-Interface
PROFINET IO controller
AS-i
slave 2
AS-i
slave 1
AS-i
slave n
AS-i slaves
PROFINET AS-Interface
IE/AS-i LINK
Cyclic services
Read analog values with data
record
Write analog values with data
record
Write digital and analog values
Acyclic services
Read digital and analog values
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.
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