Default Equipment State Class
Equipment manager component by default has an equipment state class named Default. The default class consists of the following default states.
Creating Equipment State Classes
- Select the production model item for which the equipment state class is to be changed
- Click on the change button next to the equipment state class
- The Equipment State List window appears
- Click on either an existing Equipment State or the Equipment States and then select the New Equipment State Class
- Provide a name for the new State Class and assign security roles for who can modify this State Class
- We can add an equipment state class to an existing equipment state class, creating nested state classes.
- At the Equipment State Class level, Edit, Delete, Copy, Paste and Export operations are available. At the Root level, only Paste, Import and Export operations are available.
Default Override Current Line Downtime
This checkbox (True, checked by default) causes any new State added to the class to have its Override Current Line Line Downtime checkbox initialized as True (checked). Checking or unchecking this box does not cause any existing child State to have its override setting changed.
This property is available on the MES Equipment State Class Object for use via scripting.
Refer to Override Current Line Downtime below for further details on the override feature.
Creating Equipment States for an Equipment State Class
- Adding - Select the Equipment State Class you wish to modify and click on the New Equipment State to add a new state
- Editing - Select the Equipment State you wish to modify and click on the Edit to change the State
If you expand the Equipment State Class folder you can see the existing states.
- The Edit Equipment State slide out editor allows you to change the properties of the selected Equipment State
- Add or change the Name, Type, Code, and Operator Selection Properties and click Save
Valid State Types are...
- Unplanned Downtime
- Planned Downtime
Enter in the integer value for this equipment state. This will generally align with the status code value from the PLC.
Do not set state code to zero, since zero is used internally.
The Assigned Codes list provide a view of all codes that have already been assigned.
Short Stop Threshold (seconds)
Enter in a time value in seconds for how long a state must persist for before it considered to be in this. The Short Stop Threshold is not used for states of state type RUNNING.
Down Time events can be prevented from affecting OEE Availability for a set duration of time (Short Stop Threshold). Events that occur during the Short Stop Threshold period will be ignored for ongoing OEE Availability calculations. To have all events be included in OEE Availability calculations, set Short Stop Threshold = 0.
Override Current Line Downtime
Note: This setting only affects the Key Reason detection methods, Cell Priority and Neighbor Priority.
- When this checkbox is checked (True, default condition), then this state is allowed to override the current downtime reason of the Line.
- When this checkbox is unchecked (False), the this state is not allowed to override the current downtime reason of the Line.
This property is available on the MES Equipment State Object for use via scripting.
Enable Meantime Metrics
When enabled, this state will be included in the calculation of Mean Time Between Failure (MTBF), when this state is responsible for causing a line downtime event. MTBF is calculated by taking total running time, or time during a run in which the line is not down, and dividing it by the number of applicable events. So if a production run had 3.5 hours of running time and had 5 events for which Meantime Metrics were enabled, the MTBF would be 0.7. MTBF is pertinent for unexpected downtime events or Unplanned Downtime Type states.
The Override property defines if it is possible for a operator to override the equipment state through the Downtime Table Editor component. Valid options are...
- Optional - Operator can select a different state based on the Scope setting
- Prohibited - Operator cannot change this equipment state
- Required - Operator is required to select a state based on the Scope setting for this equipment state