Rockwell-automation 57C620 AutoMax Programming Executive Version 3.8 Manual de usuario descargar pdf (Pagina 113)

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7.0 CONFIGURING VARIABLES

The

ariable Configurator is used to configure I/O points and

common memory variables in the rack. The Variable Configurator

allows you to map" names to bits and registers on I/O modules and

interface modules in the rack, as well as to common memory

variables on Processor and Common Memory modules in the rack.

Variables are configured using forms" (screens) that are specific to

each module. Mapping variables to physical locations on individual

modules and to common memory allows the programmer to create

application programs referencing variable names instead of actual

physical locations. All variable configuration data is downloaded to

the Processors in the rack before application tasks are put into run.

After selecting a module to configure and choosing Configure

Variables from the Configure menu in the Rack Configurator (or

doubleĆclicking the left mouse button on the desired module), the

Programming Executive will display the configuration form for that

module. Names for registers (and bits where applicable), as well as

descriptions, are entered in the fields displayed at the bottom of the

screen.

The variable configurator allows you to define bits (booleans),

integers (16 bits), double integers (32 bits), and real variables (32

bits).

The bits within a register that is already defined may be defined

individually. Note that in this case neither the bits nor the register

can be forced while online.

ith the exception of registers on

generic modules, no single integer variable can also be defined as

part

of a double integer variable.

I/O points cannot be defined as real

variables.

Refer to the

programming language instruction manuals for

more information on variable types.

The remainder of this section is organized as follows:

7.1 Variables That Must Be Configured

7.2

Forms Used for Configuring Variables

7.3

7.4

Entering Variable Names and Descriptions

7.5

Configuring I/O on F

oreign and Unsupported Modules

7.6

Modifying V

ariable Names and Descriptions

7.7

Variables Menu

7.8

GoT

o Menu

7.1 Variables That Must Be Configured

Variables

that must be accessible to more

than one task in the rack or

that are connected to a field I/O signal must be defined in the

Variable Configurator. These variables are called common"

variables. They can be accessed by all application tasks in the rack

that declare them COMMON. Both I/O variables and common

memory variables, i.e., those not connected to field signals, are

common variables in this sense and both must be defined in the

Variable Configurator. Local variables, those variables that do not

need

to be accessible to more than one task in the rack, and that are

not connected to a field signal, are not configured in the Variable

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Rockwell-automation 57C620 AutoMax Programming Executive Version 3.8 Manual de usuario Pagina 113

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