Mercurial Mercurial > matiec / annotate
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
lib/derivative_st.txt
author Mario de Sousa <msousa@fe.up.pt>
Mon, 04 Apr 2011 15:22:42 +0100
changeset 275 af3d0e3ac65d
parent 192 c6c2a3d487ac
child 276 1679f514f38a
permissions -rwxr-xr-x
Leave standard function names hardcoded, as these are considered keywords even though
they may not be implemented in the library.
192
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     1
 
 FUNCTION_BLOCK DERIVATIVE
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     2
 
   VAR_INPUT
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     3
 
     RUN : BOOL ;          (* 0 = reset                  *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     4
 
     XIN : REAL ;          (* Input to be differentiated *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     5
 
     CYCLE : TIME ;        (* Sampling period            *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     6
 
   END_VAR
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     7
 
   VAR_OUTPUT
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     8
 
     XOUT : REAL ;         (* Differentiated output      *)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
     9
 
   END_VAR
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    10
 
   VAR X1, X2, X3 : REAL ; END_VAR
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    11
 
   IF RUN THEN
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    12
 
      XOUT := (3.0 * (XIN - X3) + X1 - X2)
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    13
 
              / (10.0 * TIME_TO_REAL(CYCLE)) ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    14
 
      X3 := X2 ; X2 := X1 ; X1 := XIN ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    15
 
   ELSE XOUT := 0.0; X1 := XIN ; X2 := XIN ; X3 := XIN ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    16
 
   END_IF ;
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    17
 
 END_FUNCTION_BLOCK
c6c2a3d487ac Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff changeset 
    18
 












matiec