| author | Edouard Tisserant |
| Wed, 18 May 2011 16:32:46 +0200 | |
| changeset 301 | 15bf9ecb936d |
| 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 |
|
|
1679f514f38a
Updating origin and license info of library fuctions.
Mario de Sousa <msousa@fe.up.pt>
parents:
192
diff
changeset
|
11 |
|
|
192
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
12 |
FUNCTION_BLOCK HYSTERESIS |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
13 |
(* Boolean hysteresis on difference *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
14 |
(* of REAL inputs, XIN1 - XIN2 *) |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
15 |
VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
16 |
VAR_OUTPUT Q : BOOL := 0; END_VAR |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
17 |
IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
18 |
ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
19 |
END_IF ; |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
20 |
END_FUNCTION_BLOCK |
|
c6c2a3d487ac
Adding inclusion of function blocks defined in AnnexF into library blocks
lbessard
parents:
diff
changeset
|
21 |