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:
7
6
5
4
3
2
1
0
Bit 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
