Siemens S7-1200 - Diagnostic Events for Distributed; AS-I

Communication
10.4 AS-i
S7-1200 Programmable controller
576 System Manual, 03/2014, A5E02486680-AG
10.3.6
Diagnostic events for distributed
Refer to the "Diagnostics (PROFINET or PROFIBUS)": "Diagnostics events for distributed
I/O" (Page 345) for information on how to use this diagnostic information with these
communication networks.
10.4
AS-i
The S7-1200 AS-i master CM 1243-2 allows the attachment of an AS-i network to an S7-
1200 CPU.
The actuator/sensor interface, or AS-i, is a single master network connection system for the
lowest level in automation systems. The CM 1243-2 serves as the AS-i master for the
network. Using a single AS-i cable, sensors and actuators (AS-i slave devices) can be
connected to the CPU through the CM 1243-2. The CM 1243-2 handles all AS-i network
coordination and relays data and status information from the actuators and sensors to the
CPU through the I/O addresses assigned to the CM 1243-2. You can access binary or
analog values depending on the slave type. The AS-i slaves are the input and output
channels of the AS-i system and are only active when called by the CM 1243-2.
In the figure below, the S7-1200 is an AS-i master controlling AS-i operator panel and I/O
module digital/analog slave devices.
To use AS-i with S7-1200 V4.0 CPUs, you must upgrade the AS-i Master CM firmware to
V1.1.
You can make this upgrade using a Secure Digital (SD) card.
Note
It is recommended that you always update the AS
-i CM firmware to the latest version
available (
http://support.automation.siemens.com/WW/view/en/43416171)at the Siemens
Service and Support web site.