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The Xentara OEE Calculator v1.0.1
User Manual
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The Xentara OEE Calculator v1.0.1
User Manual
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The availability rate is a factor type of Xentara data point, calculates the availability rate on in a production line system. It calculates the rate of the time that the sub-system was actually available against the time expected to be available.
On sample task the availability rate get samples of the current state of the sub-system.
The required variables for sampling are:
The running is a boolean variable indicates if the system is producing products at the moment.
The planned is a boolean variable indicates if the system is planned to run.
During the sampling period, the quality and the error of the availability rate is evaluated on sample task. The quality and the error are propagated the only if the current quality is worst compared with the previous quality until the sampling period is finished with an update task.
On sample task, the intermediate attribute values are updated for availability rate, operating time, planned production time, unplanned production time. On update task the availability rate value is calculated and updated and intermediate attribute values are reset.
The availability rate is calculated by using the following variables:
The intermediate operating time describes the period of time the system was running and planned to run until the sample task since the last update task called.
The intermediate planned production describes the period of time that the system was planned to run, regardless if it was actually running or not until the sample task since the last update task called.
The intermediate unplanned downtime describes the period of time that the system was planned to run but it was not running until the sample task since the last update task called.
The Calculation process of the availability rate follows the graph bellow:
In addition to the standard members of Xentara I/O points, availability rate has the following attributes:
| value | Contains the rate availability rate value of the last update task performed. |
| quality | The quality of the availability rate value. See quality in the Xentara user manual for an explanation of an I/O point's quality. |
| sampleTime | The last time the availability rate value sampled. |
| changeTime | The last time the availability rate value changed. |
| error | The error that occurred the last time the availability rate value updated. The attribute contains one of the error string value describing the error state. |
| intermediateOperatingTime | The intermediate value of the operating state since the last sample task is performed in seconds. The attribute contains value type of double |
| intermediatePlannedProductionTime | The intermediate value of the planned production time since the last sample task performed in seconds. The attribute contains value type of double |
| intermediateUnplannedDowntime | The intermediate value of the unplanned downtime since the last sample task is performed in seconds. The attribute contains value type of double |
| intermediateAvailabilityRate | The intermediate value of the availability rate since the last sample task performed. The attribute contains value type of double |