Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 178)

API Library of Routines
Appendix B
DTL_GET_FLT
B-47
Gets a floating-point value from a byte array.
C Syntax
#include <copro.h>
unsigned DTL_GET_FLT (in_buf,out_val)
unsigned char *in_buf;
float *out_val;
Parameters
in_buf
Use to specify an array of four bytes containing an IEEE floating-point
value read from the data table as raw data.
out_val
Contains the floating point value. It is assumed that the bytes are read
into the a data area using the RAW data_type.
Returns
Status Symbolic Name Meaning
0 DTL_SUCCESS Operation successful
Description
Use the DTL_GET_FLT to converts raw 32-bit IEEE float data, in 4-byte
array, to host-type float.
C Example
float read_val;
unsigned char untyped_data[60];
unsigned machine, iostat;
.
.
.
DTL_C_DEFINE (&machine, “F8:10,15,RAW,READ”);
if (DTL_READ_W (machine, untyped_data, &iostat) == 0)
{
DTL_GET_FLT (&untyped_data [3], &real_val);
}
DTL_GET_FLT