W H E A T N E T - I P
N A V I G A T O R G U I
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WheatNet-IP
/ Apr 2009
System LIO Properties Tab
This screen is used to set certain logic output function properties. The logic system
in WheatNet-IP works by using crosspoint connections between logic inputs and
logic outputs to establish a logic path. If a logic source, for instance a switch, is
crosspoint connected to a logic destination, say relay #1, and they both have been
defined with the same function (start, remote on, user 23, etc), then the switch will
trigger relay #1 as long as the crosspoint connection is maintained. If that connection
is broken and, instead, a connection is made to a different logic destination, say
relay #2, then the switch will trigger relay #2. The question then becomes “How
should a logic output behave when it is disconnected from a logic input?” The
Navigator GUI allows you to specify this behavior separately for each logic function
(starting with function User 1). This capability can be very useful with some types of
machines that also have front panel controls. These controls may not function if the
remote control logic ports of the machine are held in the wrong state. The choices for
the disconnected state of a logic output are:
High - When the output is disconnected from a logic input it will go high.
Low - When the logic output is disconnected from a logic input it will go low. This
is the default.
Last State - When the logic output is disconnected from a logic input, it will stay
in whatever state it was last in.
