Overview

Task

The export functionality generates a channel-specific data structure containing all variables from an existing “List of External Variables” (referred to as V.E List or Variable) of a machine configuration.

Characteristics

This generated data structure can be imported to a PLC environment, thus permitting the PLC to access the V.E variables. It also permits the rapid and reliable creation of an interface between the NC controller and the PLC for data transfer.

Parametrisation

The parameter P-EXTV-00022 defines the specified number of characters is used for string variables.

Programming

The data structure is exported to a small NC program by the #EXPORT VE[...] command Since the configuration of V.E variables no longer changes after start-up, this operation is usually executed only once when the machine is started.