7 Data Exchange between PROFINET IO Controller and AS-i Slave
115
IE/AS−INTERFACE LINK PN IO as of hardware version 1, as of firmware version V2.0
Release 08/2018
C79000−G8976−C216−03
7.2 Transferring AS-i Digital Values
The PROFINET IO controller accesses the digital inputs and outputs of the AS-i
slaves in cyclic mode over the IE/AS-i LINK.
You can only access digital data of an AS-i slave if you have configured a digital
module for this slave in HW Config (see Chapter 6).
7.2.1 Addressing AS-i Slaves
Access to the bits of the AS-i slave depends on the selected type of configuration.
Access when the GSDML file or STEP 7 is used for configuration (unpacked)
If you configure with the GSDML file or use STEP 7 to configure, access to the
digital data without “packing” is byte-oriented.
One byte is assigned to every AS-i digital slave. The assignment of the AS-i
terminals AS-i digital slaves to the data bits of the assigned byte is shown below:
76543210Bit no.
Data byte
Terminal 1 of the AS-i slave
Terminal 4 of the AS-i slave
Bits 4 to 7 not used
Terminal 3 of the AS-i slave
Terminal 2 of the AS-i slave
Bits 0 to 3 are used for user data.
Digital data is accessed in SIMATIC S7 using single-bit commands.
Example:
A I 3.4
= Q 5.7
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