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Resource Information and Configuration
Events Model
Events Model
Events are a fundamental part of production. The events model is used to map out the critical events that occur to control production. These events can be created within this application or from external systems, and can be used to control workflow execution.
Condition Events
Condition events are defined by logical expressions against variable values. When these components are set and enabled, they are monitored by the system. When expressions evaluate to true, the event occurs and subscribers to the event are notified.
Evaluation of Condition Expressions
The Trigger Settings tab allows you to determine when the configured condition expressions will be evaluated. The results of these evaluations determine whether or not the event can run.
Condition Expressions
The Condition Expressions tab allows you to create expressions using mathematical or Boolean logic.

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Resource Information and Configuration
- Resource Information and Configuration
- Material Model
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- Production Model
- Events Model
  - Events Model
    Events are a fundamental part of production. The events model is used to map out the critical events that occur to control production. These events can be created within this application or from external systems, and can be used to control workflow execution.
    - Enable an event
    - Disable an event
    - Time Events
      Time events can be set by time span or by calendar, and they can be either single or recurring events.
    - Condition Events
      Condition events are defined by logical expressions against variable values. When these components are set and enabled, they are monitored by the system. When expressions evaluate to true, the event occurs and subscribers to the event are notified.
      - Properties and Attributes of Condition Events
        The Details tab offers general information about the selected condition event.
      - Evaluation of Condition Expressions
        The Trigger Settings tab allows you to determine when the configured condition expressions will be evaluated. The results of these evaluations determine whether or not the event can run.
        Set a trigger for a conditional event
        Set up class-based events
        You can bind class properties to event variables so that an event can detect a property change in any equipment to which that class has been added.
        Create variables for a condition event
        Create an expression for a condition event
        Condition Event Expression Variables
        The Variables tab allows you to add, modify, and delete expression variables to use when building event expressions. You can define one or more variables, which can be a constant value bound to an attribute of the trigger event, or bound to external data.
        Condition Expressions
        The Condition Expressions tab allows you to create expressions using mathematical or Boolean logic.
        Event Sources
        Event sources are data items that you can subscribe to.
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Condition Expressions

The Condition Expressions tab allows you to create expressions using mathematical or Boolean logic.

When an event is triggered, the expressions are evaluated. The event's variables determine if an expression is true or false. The results of this evaluation must be all or partially true, depending on the event setting, in order for the event to occur.

Tip: For general information on building expressions, see the expression editor.

The following table displays the attributes that are available in the events expression editor:

Attribute	Value	Description
Latch Expression	System-defined	Select this option if you want an expression to remain true after it has been evaluated, but is waiting for all other expression to become true. When all expressions are true, the event is signaled.
Edit	User-defined	Displays the name and description of the selected expression.
Check Syntax	System-defined	Click to confirm if an expression has been completed and ordered correctly.
Test	System-defined	Click to evaluate the expression. The Test Expression dialog box appears.
Expression Functions tab	N/A	Displays the functions available to build your expression. Double-click a function to insert into your expression.
Expression Variables tab	N/A	Displays the variables available to build your expression. Double-click a variable to insert into your expression.