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Interface to the User Program in the S7-200 CPU
2-12
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
2.4 Meaning of the Data in the Analog Module
Overview
The analog module of the CP 243-2 consists of four areas:
Identification register, 8 bits (I/O module identifier)
Error register, 8 bits
8 analog input words (8 AI)
8 analog output words (8 AO)
The most important functions handled via these areas are shown in the diagram
below:
CP 243-2
User program
Digital module
(8DI/8DO)
S7-200 CPU
AS-i master
AS-i cable
Analog module (8AI/8AO)
Binary input/output data of the AS-i slaves
Analog input/output data of the
AS-i slaves
AS-i diagnostic information (delta list)
AS-i commands and response data
Figure 2-3
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