Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Instrukcja Użytkownika Pobierz pdf (Strona 186)

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Appendix B

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B-55

Creates and initializes the DTL data-definition table.

C Syntax

#include <copro.h>

unsigned DTL_INIT (max_defines)

unsigned max_defines;

Parameters

max_defines

Specifies the maximum number of entries in the data-definition table.

One entry is needed for each data item to be defined.

Important: Once you create the DTL data definition table, you cannot

change its size within the current process.

Returns

Status Symbolic Name Meaning

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Description

Use the DTL_INIT function to initialize the data-table library before using

any DTL_ function calls.

Initializes internal data and creates a data-definition table by increasing the

memory area for the calling task .

Memory for the data-definition table is allocated dynamically when

DTL_INIT is called. Therefore, the maximum possible size of a given

task’s data-definition table depends on the amount of memory available in

the system’s free memory pool. A call to DTL_INIT will allocate

approximately 150 bytes per definition from the free-memory pool.

DTL_INIT

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Instrukcja Użytkownika Strona 186