<s>
The	O
Function	B-Application
Block	I-Application
Diagram	I-Application
(	O
FBD	O
)	O
is	O
a	O
graphical	O
language	O
for	O
programmable	B-Architecture
logic	I-Architecture
controller	I-Architecture
design	O
,	O
that	O
can	O
describe	O
the	O
function	O
between	O
input	O
variables	O
and	O
output	O
variables	O
.	O
</s>
<s>
Function	B-Application
Block	I-Application
Diagram	I-Application
is	O
one	O
of	O
five	O
languages	O
for	O
logic	O
or	O
control	O
configuration	B-General_Concept
supported	O
by	O
standard	O
IEC	O
61131-3	O
for	O
a	O
control	O
system	O
such	O
as	O
a	O
programmable	B-Architecture
logic	I-Architecture
controller	I-Architecture
(	O
PLC	O
)	O
or	O
a	O
Distributed	O
Control	O
System	O
(	O
DCS	O
)	O
.	O
</s>
<s>
The	O
other	O
supported	O
languages	O
are	O
ladder	O
logic	O
,	O
sequential	B-Language
function	I-Language
chart	I-Language
,	O
structured	O
text	O
,	O
and	O
instruction	O
list	O
.	O
</s>
