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National Instruments Direct Injector Driver System Manual
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Process Variables
Detail: Array of drop-down selection controls for selecting the Trigger Mode process variable for each
operating point. The available parameters for selection are analog inputs, battery voltage, digital input
parameters, cam phase, engine speed, and user variables. Typically, all operating points would utilize the
same process variable. For example, a set of four operating points could be created for four different ranges
of digital input frequency. However, complex operating point tables may be created using multiple inputs.
Time/Trigger Wildcards
Units: msec
Detail: Array of time values for each operating point while in Timer Mode . After the time for each operating
point elapses, execution will proceed to the next sequential operating point.
Detail: Array of text-based specifications for each operating point while in Trigger Mode .
When a Trigger Wildcard specification is TRUE, the associated operating point will be executed. The
behavior of the operating point function while no Trigger Wildcard is satisfied or multiple Trigger Wildcards
are satisfied is determined by the settings of the Undefined Trigger Behavior and Multiple Trigger Behavior
parameters. The syntax for Trigger Wildcard entries is as follows:
Parenthesis Bounded (Lower Value, Upper Value)
Detail: Trigger Wildcard is satisfied if the Process Variable is greater than Lower Value and less than Upper
Value
Example: (20,40) Trigger Wildcard is satisfied if the Process Variable is greater than 20 and less than 40.
Bracket Bounded [Lower Value, Upper Value]
Detail: Trigger Wildcard is satisfied if the Process Variable is greater than or equal to Lower Value and less
than or equal to Upper Value
Example: [20,40] Trigger Wildcard is satisfied if the Process Variable is greater than or equal to 20 and less
than or equal to 40.
Note: A Trigger Wildcard can combine the usage of parenthesis and brackets.
Example: [20, 40) Trigger Wildcard is satisfied if the Process Variable is greater than or equal to 20 and less
than 40.
Single Point Value
Detail: Trigger Wildcard is satisfied if the Process Variable is exactly equal to the single point value. It is not
recommended to use this type of Trigger Wildcard for continuously variable Process Variables . This type of
Wildcard should be used for Boolean Process Variables .
Example: A Trigger Wildcard single point value of 1 is satisfied if a Boolean parameter, such as 9411_1.0
State is equal to
1
, or
TRUE
.
Note: For single point value Wildcards, do not use text such as TRUE or FALSE. Use 1 to represent TRUE
and 0 to represent FALSE .
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