Converting Eint Values To Reals Using Scripted Text In A Plc

[marke]

EInt2Float Subroutine in Scripted Text on a Horner Series PLC.

 

 

(******************************************************************)
(* EInt2Float *)
(* Convert Emotron EInt values to standard floating point. *)
(******************************************************************)

If And_Mask(EIntIn,16#8000) = 0 then
EReal := ANY_TO_REAL(And_Mask(EIntIn,16#7FFF));
Return;
End_If;

(* Get Mantissa and convert to real *)
TempWord := And_Mask(EIntIn,16#3FF);
TempInt := ANY_TO_INT(TempWord);
If And_Mask(EintIn,16#0400) = 16#0400 then TempInt := TempInt-16#0400; End_If;
EReal1 := ANY_TO_REAL(TempInt);

(* Get Exponent and convert to real *)
TempWord := And_Mask(EIntIn,16#3800);
TempInt := (ANY_TO_INT(TempWord))/2048;
If And_Mask(EIntIn,16#4000)=16#4000 then TempInt := TempInt - 8;
End_If;
TempReal := ANY_TO_REAL(TempInt);

(* Combine Mantisa and Exponent and output. *)
EReal := EReal1 * EXPT(10, TempReal );

 

 

Typical Subroutine Call.
DispCurrent := eint2floatST(FDU2Curr);

[marke]

Here is the Structured Text Subroutine code that can be imported to CScape Version 9.6 or later.

Right Click on Logic Modules and select Import Modules and chose eint2floadtST.XK5

eint2floatST.XK5

[marke]

If you really want to do it the hardway, you can use ladder code (ugly!!)

Right Click on Logic Modules and select Import Modules and chose eint2floadtLD.XK5

eint2floatLD.XK5