lib/ramp_st.txt
author Mario de Sousa <msousa@fe.up.pt>
Wed, 25 Apr 2012 15:56:45 +0100
changeset 532 cb78940b2cb8
parent 276 1679f514f38a
permissions -rwxr-xr-x
Remove access to NULL pointer.
276
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     1
(* Following taken directly from the IEC 61131.3 draft standard *)
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     2
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     3
(*
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     4
 * An IEC 61131-3 IL and ST compiler.
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     5
 *
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     6
 * Based on the
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     7
 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     8
 *
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
     9
 *)
1679f514f38a Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents: 0
diff changeset
    10
0
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    11
 FUNCTION_BLOCK RAMP
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    12
   VAR_INPUT
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    13
     RUN : BOOL ;      (* 0 - track X0, 1 - ramp to/track X1 *)     
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    14
     X0,X1 : REAL ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    15
     TR : TIME ;       (* Ramp duration *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    16
     CYCLE : TIME ;    (* Sampling period *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    17
   END_VAR
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    18
   VAR_OUTPUT
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    19
     BUSY : BOOL ; (* BUSY = 1 during ramping period *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    20
     XOUT : REAL := 0.0 ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    21
   END_VAR
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    22
   VAR XI : REAL ;       (* Initial value *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    23
       T : TIME := T#0s; (* Elapsed time of ramp *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    24
   END_VAR
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    25
   BUSY := RUN ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    26
   IF RUN THEN
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    27
      IF T >= TR THEN BUSY := 0 ; XOUT := X1 ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    28
      ELSE XOUT := XI + (X1-XI) * TIME_TO_REAL(T)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    29
                                / TIME_TO_REAL(TR) ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    30
           T := T + CYCLE ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    31
      END_IF ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    32
   ELSE XOUT := X0 ; XI := X0 ; T := t#0s ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    33
   END_IF ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    34
 END_FUNCTION_BLOCK
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    35