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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 Performance Rate is a factor type of xentara data point, calculates the Performance Rate in a production line system. It calculates the rate of the number of produced products against to the products that expected to be produced.
On sample task the Performance Rate reads the variables for the current state of the system.
The required variable for sampling are:
The operation time is provided from an availability rate factor within the same calculation group. The operation time is a type of double describing the operation time in seconds. For a proper use, the selected Availability Rate must have intermediate impact in the production line.
The ideal run rate is defines the ideal number of the products per minute expected to be produced.
The total actual product describes the number of the products that have produced and expected to be a counter with constantly increasing value.
During the sampling period, the quality and the error of the performance 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 ideal run rate, performance rate, total actual product and total potential product. On update task The performance rate value is calculated and updated and intermediate attribute values are reset.
On sample task the performance rate is calculated by the following factors:
The intermediate operating time is the period of time that the machine actually producing products. This is calculation is made by the attached availability rate.
The intermediate ideal run rate describes the ideal run rate was set since the last sample task or update task called.
The intermediate total actual product describes the total number of products produced since the sample task until the last update task called. On update task the value of the total actual product it is set as bias value. The positive difference between the bias value and the total actual product is read on sample task is defined as intermediate total actual product.
The intermediate total potential product describes the total number of products ideally expected to be produced since the sample task or until the since update task called.
The Calculation of the Performance Rate follows the graph bellow:
In addition to the standard members of Xentara I/O points, performance rate has the following attributes:
| value | Contains the rate value of the last calculation preformed. |
| quality | The quality of the performance rate value. See quality in the Xentara user manual for an explanation of an I/O point's quality. |
| sampleTime | The last time the performance rate value sampled. |
| changeTime | The last time the performance rate value changed. |
| error | The error that occurred the last time the performance rate value was updated. The attribute contains one of the error string value describing the error state. |
| intermediateIdealRunRate | The intermediate value of the ideal run rate. The attribute contains value type of double |
| intermediatePerformanceRate | The intermediate value of the performance rate since the last sample task is performed in seconds. The attribute contains value type of double |
| intermediateTotalActualProduct | The intermediate value of the total actual product since the last sample task is performed. The attribute contains value type of unsigned integer |
| intermediateTotalPotentialProduct | The Intermediate value of total potential product since the last sample task is performed. The attribute contains value type of double |