Mercurial Mercurial > matiec / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
AnnexF/hysteresis_st.txt
author etisserant
Mon, 14 May 2007 09:48:25 +0200
changeset 26 fd67f54e64e1
parent 0 fb772792efd1
permissions -rwxr-xr-x
Now, LOCATED variables do declare extern C variables the same way EXTERNAL variables do. 
FUNCTION_BLOCK HYSTERESIS
    (* Boolean hysteresis on difference *)
    (* of REAL inputs, XIN1 - XIN2      *)
  VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR
  VAR_OUTPUT Q : BOOL := 0; END_VAR
  IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ;
  ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ;
  END_IF ;
END_FUNCTION_BLOCK
matiec