Configuring Slaves With Step 7 - Siemens S7-1200 System Manual

10.4.2.2

Configuring slaves with STEP 7

Transferring AS-i digital values
The CPU accesses the digital inputs and outputs of the AS-i slaves through the AS-i master
CM1243-2 in cyclic operation. The data is accessed through I/O addresses or by means of a
data record transfer.
①
②
③
Access to the digital data is performed here in bytes (in other words, one byte is assigned to
each AS-i digital slave). When you configure the AS-i slaves in STEP 7, the I/O address for
accessing the data from the user program is displayed in the inspection window for the
respective AS-i slave.
The digital input module (AS-i SM-U, 4DI) in the AS-i network above has been assigned
slave address 1. By clicking on the digital input module, the "AS interface" tab in the device
"Properties" displays the slave address, as shown below:
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
AS-i slave address 1
AS-i slave address 2A
AS-i slave address 3
Communication
10.4 AS-i
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