I have listed below an example of doing First Out logic in a PLB block.
It can have up to 29 triggers (I have only shown 3 for brevity). I am not
sure how this will format, but if there is interest I can put it on the wik=
i.
I have also done first out logic with calc blocks which can have up to
64 triggers, but the calc blocks execute slower than the PLB.
NAME =09 =09=09U200:CON200:FIRST_OUT:LADDER
DATE =09 =09=0904/27/2005
TYPE =09 =09=09PLB
DESCRP =09 =09FIRST OUT LOGIC
PERIOD =09 =091
IOM_ID =09 =09D10205
IFL_1 =09 =09VENTURI:TE_1601B.HAIND
IFL_2 =09 =09VENTURI:TE_1600A.HAIND
IFL_3 =09 =092_1COND_G:2AT_9109A.BO01
IFL_31 =09 =09:LADDER.PAKIFL.AHFFFF
IFL_32 =09 =09:LADDER.PAKIFL.AFFF8
MA =09 =09=09:LADDER.MA.1
LADDER LOGIC DIAGRAM
=20
=20
IFL_1 OFL_32 OFL_1 =
=20
1 ---| |------|\|---------------------------------------------------(L)---
LATCH =
=20
=
=20
=20
=20
IFL_2 OFL_32 OFL_2 =
=20
2 ---| |------|\|---------------------------------------------------(L)---
LATCH =
=20
=
=20
=20
=20
IFL_3 OFL_32 OFL_3 =
=20
3 ---| |------|\|---------------------------------------------------(L)---
LATCH =
=20
=20
OFL_1 OFL_32=
=20
30 ---| |---+--------------------------------------------------------(L)---
| LATCH =
=20
| =
=20
| =
=20
OFL_2 | =
=20
31 ---| |---+ =
=20
| =
=20
| =
=20
| =
=20
OFL_3 | =
=20
32 ---| |---+
=20
IFL_31 IFL_32 OFL_32 IFL_30 OFL_30=
=20
59 ---|\|------|\|------| |------| |---------------------------------( )---
1-16 17-29 LATCH OPERATOR RST OK=
=20
RESET RESET RESET =20
=
=20
=
=20
60 =
=20
=
=20
=
=20
=20
=20
OFL_30 OFL_32=
=20
61 ---| |---------------------------------------------------------+--(U)---
RST OK | LATCH =
=20
| =
=20
| =
=20
| OFL_1 =
=20
62 +--(U)---
| =
=20
| =
=20
| =
=20
| OFL_2 =
=20
63 +--(U)---
| =
=20
| =
=20
| =
=20
| OFL_3 =
=20
64 +--(U)---
--=20
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