Lenze Engineer v2.21 Manual do Utilizador descarregar pdf (Página 156)

Defining the system functionality

Port editor (ports)

156

Lenze · Engineer · 2.13 EN - 10/2014

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•Example:

<Num> - indicates the byte offset in the process data object.

Network specification for interconnection

For the automatic interconnection the user can specify an interface and therefore implicitly a

network for the break-up of a logic connection here.

• The interface and the network connected are both shown.

• The specification can be edited by clicking the Change network specification button. Only

interfaces/networks are shown via which interconnection for each machine application is

possible.

Variable definition

Display of the variable definition for a port selected.

8.11.1 Overview: Variable types for ports

A port of an application consists of variables. The »Engineer« summarises these variables again to

"Simple", "Record" or "Array" variable types:

 Tip!

In general, the variable type to be used depends on the application. The criteria given in the

following subchapters can help you to find a suitable variable type.

"Simple" variable type

( 157)

"Record" variable type

( 159)

"Array" variable type

( 159)

Variable type Info

Simple This type only contains one variable of a basic data type like INT, WORD, etc.

• Use this type if it is not known how the devices are comprehensively

interconnected. A data consistency between the variables is not required.

Record This type contains one or several variables of a basic data type like INT, WORD, etc.

• Use this type e.g in an interconnection of controllers with a ready-made

application and the same data structure.

Array This type contains one or several variables of the same basic data type like INT,

WORD, etc.

• Use this type with simple binary systems (e.g. I/O terminals).

 Note!

The identifiers of ports and the associated variables have to be definite.

The identifiers of the »Engineer« must not be identical with the IEC 61131-5 identifiers.

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Lenze Engineer v2.21 Manual do Utilizador Página 156