Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Uživatelský manuál stáhnout pdf (Strana 180)

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Appendix B

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B-49

Gets a word from a byte array.

C Syntax

#include <copro.h>

short DTL_GET_WORD (in_buf)

unsigned char *in_buf;

Parameters

in_buf

Use to specify an array of two bytes containing programmable-

controller data.

Returns

Variable Value

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Description

Use the DTL_GET_WORD function to extract two bytes from a byte array

in programmable-controller format (raw) and returns a word (short) value

in control-coprocessor format.

C Example

short word_val;

unsigned char untyped_data[50];

unsigned machine;

unsigned iostat;

DTL_C_DEFINE (&machine, “N7:0,25,RAW,READ”);

if (DTL_READ_W (machine, untyped_data, &iostat)==DTL_SUCCESS)

{

word_val = DTL_GET_WORD (&untyped_data[11]);

}

DTL_GET_WORD

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Uživatelský manuál Strana 180