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NV9641
User’s Guide
reconstruct the term in the appropriate entry fields, and click the ‘Change’ button to effect
the change.
Using the arrows is the only way to position between two items or at the end of the
expression. You can double-click a term or an operator to select it directly.
You can click ‘Check Syntax’ to evaluate the syntax of your complete expression. Generally,
an syntax error will have occurred because you forgot an operator between terms or you
have an extra operator at the end. You can click ‘Delete’ to delete a selected term.
This is a summary of Boolean operations:
All operands evaluate either TRUE or FALSE.
AND = true if ALL terms are true; false if ANY term is false.
OR = false if ALL terms are false; true if ANY term is true.
NOT = true if term is false; false if term is true (i.e., negation).
Relay output expressions can be as rich (or complex) as you require.
Configuring Inputs
Clicking an input button (one of 8) displays the GPI input dialog:
An event is signalled when a transition occurs on the input from on to off or from off to on.
You can configure the NV9641 to recognize either occurrence on any of the 8 inputs, and
specify one of 4 behaviors for each event or both:
1 Execute a salvo.
If you choose this behavior, select a salvo ID in the salvo drop-down list.
Note:
Although it is not evident in the GPIO input dialog (or anywhere else), a ‘Previous
Source’ command in a salvo chooses the most recent source that is
different
from the
current source (for a designated destination).
2 Route the “previous source” (that was switched by
any
control panel) to a destination,
even if it is the same as the current source.
If you choose this behavior, select a destination in the destination drop-down list.
