Siemens SIMATIC S7 - Gp_To_Float

SIEMENS AG PRODAVE S7
Toolbox for Data Link PGs/PCs to SIMATIC S7
54
gp_to_float
The function gp_to_float converts an S7 floating point value to a value of the
float type (IEEE-Format).
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See also float_to_gp
C-Adapter
void gp_to_float(void * gp, void * ieee);
Example:
Assumption: DBW 0 and DBW 2 = floating point 1,234*10
-5
or
DBW 0 = 374F hex, DBW 2 = 07E5 hex in DB 1.
This program reads 2 data words (DBW 0 and DBW 2), converts the S7 floating
point format to IEEE format and makes the value available for processing in the
variable "ieee".
C-Adapter
#include <komfort.h>
#include <w95_s7.h>
int error;
int buffer[100]
int dbno,dwno,amount;
float ieee;
:
dbno = 10;
dwno = 0;
amount = 2;
error = db_read(dbno,dwno,&amount,buffer);
gp_to_float(buffer,&ieee);
:
error = unload_tool();
: