(* Following taken directly from the IEC 61131.3 draft standard *)
(*
* An IEC 61131-3 IL and ST compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*)
(*
* This is part of the library conatining the functions
* and function blocks defined in the standard.
*
* Counter function blocks
* -----------------------
*)
(******************)
(* *)
(* C T U *)
(* *)
(******************)
FUNCTION_BLOCK CTU
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : INT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_DINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : DINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_LINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : LINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_UDINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : UDINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTU_ULINT
VAR_INPUT
CU : BOOL;
R : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : ULINT;
END_VAR
VAR
CU_T: R_TRIG;
END_VAR
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
END_IF ;
Q := (CV >= PV) ;
END_FUNCTION_BLOCK
(******************)
(* *)
(* C T D *)
(* *)
(******************)
FUNCTION_BLOCK CTD
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : INT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_DINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : DINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_LINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : LINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_UDINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : UDINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTD_ULINT
VAR_INPUT
CD : BOOL;
LD : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
Q : BOOL;
CV : ULINT;
END_VAR
VAR
CD_T: R_TRIG;
END_VAR
CD_T(CD);
IF LD THEN CV := PV ;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF ;
Q := (CV <= 0) ;
END_FUNCTION_BLOCK
(********************)
(* *)
(* C T U D *)
(* *)
(********************)
FUNCTION_BLOCK CTUD
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : INT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : INT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_DINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : DINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : DINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_LINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : LINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : LINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_UDINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : UDINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : UDINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK
FUNCTION_BLOCK CTUD_ULINT
VAR_INPUT
CU : BOOL;
CD : BOOL;
R : BOOL;
LD : BOOL;
PV : ULINT;
END_VAR
VAR_OUTPUT
QU : BOOL;
QD : BOOL;
CV : ULINT;
END_VAR
VAR
CD_T: R_TRIG;
CU_T: R_TRIG;
END_VAR
CD_T(CD);
CU_T(CU);
IF R THEN CV := 0 ;
ELSIF LD THEN CV := PV ;
ELSE
IF NOT (CU_T.Q AND CD_T.Q) THEN
IF CU_T.Q AND (CV < PV)
THEN CV := CV+1;
ELSIF CD_T.Q AND (CV > 0)
THEN CV := CV-1;
END_IF;
END_IF;
END_IF ;
QU := (CV >= PV) ;
QD := (CV <= 0) ;
END_FUNCTION_BLOCK