Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 240)

API Library of Routines
Appendix B
MSG_WRITE_W_HANDLER
B-109
Handles a PLC-5 programmable-controller generated
message-write instruction.
C Syntax
#include <copro.h>
unsigned MSG_WRITE_W_HANDLER (variable,buff_size,msg_num,
items,timeout,cc_type,plc_type,iostat)
short *variable;
unsigned buff_size;
unsigned msg_num;
unsigned items;
unsigned timeout;
unsigned cc_type;
unsigned plc_type;
int *iostat;
Parameters
variable
Address of a buffer that stores the write data.
buff_size
Size of the write buffer in bytes.
msg_num
Number of the PLC-5 programmable-controller message (0-31).
items
Number of data items to be written by the PLC-5 programmable
controller. The number and size of the items cannot be greater than
234 bytes—e.g., maximum of 58 floating-point values of 4 bytes each
are
<
234 bytes.
timeout
Timeout value in seconds. A value of CC_FOREVER (defined in
COPRO.H) will not return until the message has been processed.
MSG_WRITE_W_HANDLER