Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manual de usuario descargar pdf (Pagina 162)

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Appendix B

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B-31

Requests the PLC-5 programmable controller to perform a block-transfer

write to an intelligent I/O module.

Important: You can use this function only if the coprocessor is connected

directly to the PLC-5 programmable controller.

C Syntax

# include <copro.h>

unsigned CC_PLC_BTW (r,g,m,size,retry,data_ptr,iostat)

unsigned char r;

unsigned char g;

unsigned char m;

unsigned char size;

unsigned char retry;

unsigned short *data_ptr;

unsigned *iostat;

Parameters

The assigned rack number in which the target I/O module resides.

The I/O group number that specifies the target I/O module.

The module slot number within the I/O group.

size

The number of words to be written to the I/O module.

retry

The retry value for doing the block transfer. If the value is 0, the

processor will retry the transfer one time before returning. If the value

is 1, the processor will repeatedly attempt the transfer to an

unresponsive module for four seconds.

data_ptr

The address of a data buffer that contains the block-transfer write data.

iostat

This parameter returns a final completion status. Possible completion

status values are shown in the following table.

CC_PLC_BTW

1 2 ... 157 158 159 160 161 162 163 164 165 166 167 ... 311 312

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manual de usuario Pagina 162