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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.
Create variables for a condition event

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Resource Information and Configuration
- Resource Information and Configuration
- Material Model
- Material Inventory
- Equipment Model
- 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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Operator Task List in the Workflow Client
Best Practices

Create variables for a condition event

Procedure

In the navigator, click Events.
In the Folders list, select the resource type you want to work with.

Tip: As more lists appear, select the appropriate resource until you find the one you want to work with.
In the Displays panel, select an editor.
The editor appears in the workspace, displaying the resource information.
On the Variables tab, click Add.

Tip: To permanently remove a variable from the event, select the variable, and then click Delete.
In the Variable Name field, enter a name.

Note: The variable name must be alphanumeric and must not contain spaces.

Select one of the following options:

Select...	Then...
Bind variable to external data	Click Configure Data Item. The Configure Variable Data Source dialog box appears. Configure the data source. Click OK.
Bind variable to an attribute of the Event Trigger	Note: This option is available only if a trigger event has been set. Select an attribute. Enter a default value.
Variable represents a constant value	Select a data type. Enter a value for the data type.

Click Save.