Watlow LogicPro Manuel d'utilisateur Page 121

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Doc.# 28002-00 Rev 3.00 Watlow Anafaze 105
9
Function Block Diagrams
Function Block diagrams (FBD) is a graphical programming
language provided by LogicPro. In the broadest sense, this
language allows you to manipulate function blocks in much
the same way as in the Ladder programming language. As
with the Ladder language, FBD allows you to simply create
and edit complex programs using a powerful set of tools.
The biggest difference between the Ladder and FBD
languages is their focus. While Ladder allows you to create
complex programs that include function blocks, FBD is
simpler to use for applications such as creating process
programs where inputs tend to be something other than
discrete devices such as limit switches and proximity sensors.
FBD allows you to map out what comes in and where it’s
coming from without being restricted by the rigid structure of
a discrete oriented Ladder diagram.
As with a Ladder program, an FBD program can be used
either inside an action of an SFC program or as a stand-alone
program.
FBD Toolbar
Table 9.1 shows the SFC tools with a brief description of each
tool's function. The following sections describe the tools and
the Actions they produce in greater detail.
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