Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 162)

API Library of Routines
Appendix B
CC_PLC_BTW
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
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
r
The assigned rack number in which the target I/O module resides.
g
The I/O group number that specifies the target I/O module.
m
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