Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manual do Utilizador descarregar pdf (Página 265)

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Appendix B

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B-134

Description

Use TAG_WRITE to write data to a tagged memory area. This

function guarantees that the write data area is semaphored during the

write operation.

C Example

unsigned my_fred;

unsigned status;

my_fred = 42;

status = TAG_WRITE (“Fred”,0,sizeof(my_fred),&my_fred,30);

BASIC Example

The BASIC function number is 68.

DIM status : INTEGER

DIM tag_id : INTEGER

DIM w_data : INTEGER

rem * TAG_WRITE - write 4 bytes to a tag, starting at offset 0 from

rem * w_data with a timeout of 30 seconds.

RUN AB_BAS (68,status,tag_id,0,4,ADDR(w_data),30)

References

TAG_LINK(); TAG_DEFINE(); TAG_UNDEF();

TAG_GLOBAL_UNDEF(); TAG_READ(); TAG_LOCK();

TAG_UNLOCK(); TAG_READ_W(); TAG_WRITE_W();

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