lib/ramp_st.txt
author mjsousa
Sat, 05 Jul 2014 13:39:30 +0100
changeset 900 1e749c7b70f8
parent 276 1679f514f38a
permissions -rwxr-xr-x
Fix time conversion function in std library, and change into macro (so it may be used in variable initialisations)
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