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Interface to the User Program in the S7-200 CPU

2-2

SIMATIC NET CP 243-2 AS-i Master

C79000-G8976-C142/02

2.1 Overview

CP 243-2 as Expansion Module in the S7-200

The CP 243-2 occupies 2 consecutive expansion module slots in the S7-200:

 Digital module 8DI/8DO

 Analog module 8AI/8AO

CP 243-2

User program

Digital module (8DI/8DO)

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

 Status/error information

 Control of the CP

 Bank selection

S7-200 CPU

AS-i master

AS-i cable

Figure 2-1

Digital Module

The digital module occupies 8 input and 8 output bits in the address area of the

digital inputs and outputs. The S7-200 CPU and the CP 243-2 are coordinated via

the digital module.

The data to be addressed in the analog module by the user program is selected

using bank select bits.

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