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FM-3 Programming Module Reference Manual
I/O Setup Group
The I/O Setup group contains four views that control input and output functions as well as
other drive functions. These views are as follows: Selector, Assignments, Input Lines and
Output Lines. These can be viewed by expanding I/O Setup by simply clicking on any one of
the setup views underneath the I/O Setup.
Selector View
The selector View is located under I/O Setup in the hierarchy on the left of the view.
Figure 38: Selector View
The selector allows conservation of the number of input lines by using a binary input
conversion to decimal. The binary select lines are set up by assigning sources to the
selector.select destinations on the Assignments view. In most cases, hardware inputs are
assigned to the selector.select functions (see Figure 38).
Based on the status of the binary select lines, a selector.selection source will be active when
the Selector.SelectorInitiate destination is activated.
At the top of the Selector view, the Selector Input Destinations field defines how many binary
select lines will be used. The number of Selector.Selections is a direct result of the number of
select lines. The formula is as follows:
# of selections = 2
n
where n is the number of select lines.
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