AnnexF/integral_st.txt
author mjsousa
Thu, 30 Apr 2015 20:54:04 +0100
changeset 1000 556b74055518
parent 0 fb772792efd1
permissions -rwxr-xr-x
Add check for repeated elements in a CASE statement. Emit warnings (and not errors) if found.
 FUNCTION_BLOCK INTEGRAL
   VAR_INPUT
     RUN : BOOL ;       (* 1 = integrate, 0 = hold *)
     R1 : BOOL ;        (* Overriding reset        *)
     XIN : REAL ;       (* Input variable          *)
     X0  : REAL ;       (* Initial value           *)
     CYCLE : TIME ;     (* Sampling period         *)
   END_VAR
   VAR_OUTPUT
     Q : BOOL ;         (* NOT R1                  *)
     XOUT : REAL ;      (* Integrated output       *)
   END_VAR
   Q := NOT R1 ;
   IF R1 THEN XOUT := X0 ;
   ELSIF RUN THEN XOUT := XOUT + XIN * TIME_TO_REAL(CYCLE);
   END_IF ;
 END_FUNCTION_BLOCK