Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Instrukcja Użytkownika Pobierz pdf (Strona 182)

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Appendix B

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B-51

Gets a 3-digit BCD value from a byte array.

Important: This function only examines the low-order 12 bits of the

buffer containing the BCD value. Data in the high-order 4 bits are ignored

when converting to binary format.

C Syntax

#include <copro.h>

unsigned DTL_GET_3BCD (in_buf,out_val)

unsigned char *in_buf

unsigned *out_val

Parameters

in_buf

Use to specify an array of two bytes that contains the 3-digit BCD

value. It is assumed the data were read from a data item with a control-

coprocessor data type that is raw.

out_val

Contains the binary value.

Returns

Status Symbolic Name Meaning

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Description

Use the DTL_GET_3BCD to convert a programmable-controller

3-digit BCD value, stored in a 2-byte array, to a control-coprocessor

unsigned value.

C Example

unsigned status;

unsigned char thumbwheel_data [2];

unsigned thumbwheel_binary;

status = DTL_GET_3BCD (thumbwheel_data,&thumbwheel_binary);

DTL_GET_3BCD

1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 311 312

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Instrukcja Użytkownika Strona 182