Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Uživatelský manuál stáhnout pdf (Strana 186)

$$)""'&!%

Appendix B



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



 #$&"! %'%%'

  "& !"'  "$) (

   %)%& $) !&*

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

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 311 312

Žádné komentáře

Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Uživatelský manuál Strana 186