| author | mjsousa |
| Sun, 09 Feb 2014 07:23:30 +0000 | |
| changeset 861 | 443e8243f289 |
| parent 276 | 1679f514f38a |
| permissions | -rwxr-xr-x |
|
276
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
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:
192
diff
changeset
|
2 |
|
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
diff
changeset
|
3 |
(* |
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
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:
192
diff
changeset
|
5 |
* |
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
diff
changeset
|
6 |
* Based on the |
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
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:
192
diff
changeset
|
8 |
* |
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
diff
changeset
|
9 |
*) |
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
diff
changeset
|
10 |
|
|
192
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
11 |
FUNCTION_BLOCK PID |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
12 |
VAR_INPUT |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
13 |
AUTO : BOOL ; (* 0 - manual , 1 - automatic *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
14 |
PV : REAL ; (* Process variable *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
15 |
SP : REAL ; (* Set point *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
16 |
X0 : REAL ; (* Manual output adjustment - *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
17 |
(* Typically from transfer station *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
18 |
KP : REAL ; (* Proportionality constant *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
19 |
TR : REAL ; (* Reset time *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
20 |
TD : REAL ; (* Derivative time constant *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
21 |
CYCLE : TIME ; (* Sampling period *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
22 |
END_VAR |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
23 |
VAR_OUTPUT XOUT : REAL; END_VAR |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
24 |
VAR ERROR : REAL ; (* PV - SP *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
25 |
ITERM : INTEGRAL ; (* FB for integral term *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
26 |
DTERM : DERIVATIVE ; (* FB for derivative term *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
27 |
END_VAR |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
28 |
ERROR := PV - SP ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
29 |
(*** Adjust ITERM so that XOUT := X0 when AUTO = 0 ***) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
30 |
ITERM (RUN := AUTO, R1 := NOT AUTO, XIN := ERROR, |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
31 |
X0 := TR * (X0 - ERROR), CYCLE := CYCLE) ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
32 |
DTERM (RUN := AUTO, XIN := ERROR, CYCLE := CYCLE) ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
33 |
XOUT := KP * (ERROR + ITERM.XOUT/TR + DTERM.XOUT*TD) ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
34 |
END_FUNCTION_BLOCK |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
35 |