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Functions of the IM 151-7 CPU

8-32

ET 200S IM 151-7 CPU Interface Module

A5E00058783-04

Distribution of the S7 connections

The distribution of the S7 connections of the CPUs are shown in the table below:

Table 8-12 Distribution of the S7 connections

Communication utility

Distribution

PD communication

OP communication

S7 basic communication

So that the assignment of the S7 connections does not

depend solely on the sequence in which the various

communication utilities arise, S7 connections can be reserved

for these utilities.

For the PD and OP communication, at least one S7

connection is reserved for each as a preassignment.

The table below and the technical data show the S7

connections that can be adjusted and the presettings for the

IM 151-7 CPU. A “redistribution“ of the S7 connections is set

up in STEP 7 when the CPU is parameterized.

S7 communication

Other communication

connections (e.g. via

CP 343-1 with data

lengths  240 byte)

The available S7 connections that have not been reserved for

a specific utility (PD/OP communication, S7 basis

communication) are assigned for this purpose.

Routing of PD functions

(only for IM 151-7 CPU

with DP master module)

The CPUs make available 4 connections for routing from PD

functions. These connections are additional to the S7

connections.

Global data

communication

This communication utility does not use S7 connections.

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Siemens ET 7Y Series Especificaciones Pagina 144