Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Uživatelský manuál stáhnout pdf (Strana 264)

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Appendix B



B-133

Writes data to a user’s TAG memory area.

C Syntax

#include <copro.h>

unsigned TAG_WRITE (tag,offset,size,buffer,timeout)

unsigned tag;

char *tag

unsigned offset;

unsigned size;

unsigned char *buffer;

unsigned timeout;

Parameters

tag

Use to access the TAG table. This can be either the symbolic TAG or

the handle returned from a TAG_LINK or TAG_DEFINE call.

offset

A byte offset from the start of the tagged area from where data will

be written.

size

Specifies the number of bytes to write to the tagged area.

buffer

Specifies the buffer to copy the write data write to the tagged area.

timeout

Timeout value in seconds (valid range 0-16383). The function will

timeout unless the TAG can be written before the timeout expires. The

TAG may not be able to be written if another process has the TAG

locked. A value of CC_FOREVER (defined in COPRO.H) will cause

this function to wait indefinitely until the TAG can be written.

Returns

Value Symbolic Name Meaning



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   #$%(,$  -21 -% / ,&$

   1 0(7$ &/$ 1$/ 1' , 1'$ + 5(+2+ **-4$#

  ,3 *(# 1(+$-21 3 *2$

  (# ,-1 "-+.*$1$ (, 1(+$  *-")$#

   4/(1$ (0 */$ #6 .$,#(,& -, 1'(0 

   ,-1 %-2,#

   **$/ (0 ,-1 1'$ *-")$/ -% 1'(0 

   (0  -,*6

TAG_WRITE

1 2 ... 259 260 261 262 263 264 265 266 267 268 269 ... 311 312

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