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AnnexF/weigh_st.txt
author mjsousa
Sat, 15 Mar 2014 20:10:20 +0000
changeset 876 e2c4f6f4abe2
parent 0 fb772792efd1
permissions -rwxr-xr-x
Add support for parsing of REF_TO keyword (defined in IEC61131-3 v3). This support is currently inactive (in flex) until we get to add C code generation later on. 
FUNCTION WEIGH : WORD     (* BCD encoded *)
  VAR_INPUT  (* "EN" input is used to indicate "scale ready" *)
    weigh_command : BOOL;
    gross_weight : WORD ; (* BCD encoded *)
    tare_weight : INT ;
  END_VAR
(* Function Body *)
IF weigh_command THEN
  WEIGH := INT_TO_BCD (BCD_TO_INT(gross_weight) - tare_weight);
END_IF ;

END_FUNCTION                     (* Implicit "ENO" *)
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