Siemens S7-400 Manual de Serviço descarregar pdf (Página 127)

Configuring the Distributed I/O (DP)

Configuring Hardware and Communication Connections with STEP 7

A5E00706939-01

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3.11.3 Working With the Topology View

Display of the Nodes

The upper section of the "Topology display PROFIBUS DP" window shows the

nodes that cannot be assigned.

Representation Meaning

Nodes cannot be assigned.

The possible causes are indicated in a

message in the window:

Nodes have been added, node addresses

have been changed and afterwards the

function "Prepare Line Diagnostics" was not

started. If diagnostic repeaters are connected

that do not support the reading of topology

data, this is also reported in the upper section

of the window.

An unknown node is indicated by a series of

question marks.

The lower section of the window shows the nodes that can be assigned as

networked nodes along with the distance information determined not and, if

necessary, other information.

Representation Meaning

Nodes can be assigned and represented in the

PROFIBUS topology.

Other information such as a faulty

configuration (such as when the measuring

segments of two diagnostic repeaters are

directly connected) will be reported in a

message.

Representation of the cable lengths (in the

example):

The cable length between the DP slave with

the PROFIBUS address 2 and the diagnostic

repeater (PROFIBUS address 16) is 4 meters.

The DP slave is connected at segment DP2.

Node can be assigned, but cannot be reached

by the diagnostic repeater at this time.

Node can be assigned, but has been detected

as faulty by the diagnostic repeater

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Siemens S7-400 Manual de Serviço Página 127