Editing Calculation Formulas in the PI Assistant 

Prerequisites

You want to edit a process data calculation formula for the R/3 PI sheet.

You have created the process data calculation formula in the master recipe and called the process instruction assistant (PI assistant); see Editing Process Instructions in the PI Assistant.

If you can only define some of the data of a process data calculation formula, such as the value of a message characteristic, when you are in the process order, you can leave the relevant field blank in the master recipe.

Procedure

  1. On the first screen, check and correct the calculation formula and the assigned message category.
    1. Enter the message category of the process message to be created for the process instruction in the PI sheet.

      2. To help you select the message category, the assistant displays all characteristics of the assigned message category on this screen.

    2. Choose Next screen.
  2. On the second screen, check and correct the selection and processing of the message characteristics and variable you want to copy to the process instruction.
    1. Set the selection indicator for the characteristics of the process message category you want to copy to the process instruction, and thus to the corresponding process message.
    2. If you want to add characteristics to the process message that are not defined for the message category, choose Add. char. (Insert additional characteristic) and select the characteristic you want to add.
    3. If you want to display additional variable values in the PI sheet, choose Output variable and enter the variable name.
    4. Set the Calculat. indicator for the numeric characteristic whose value is to be calculated in the PI sheet.
    5. Set the Output indicator for characteristics whose values are to be displayed in the PI sheet.

      6. The indicator is automatically set for variables and the value to be calculated.

    6. If the unit of measure is to be displayed after the value to be calculated in the PI sheet, set the UM indicator for this value.

      7. This is only possible if the standard characteristic for the unit of measure is contained in the process instruction.

    7. Choose Next screen.
  3. On the third screen, check and correct the short texts and the sequence of the output values and the value to be calculated.
    1. Determine the sequence of the values using sort numbers.
    2. Enter short texts for the values.

      3. If you define several output values and want them displayed in the same line, enter a short text for the first output value only.

    3. Choose Next screen.
  4. On the fourth screen, check and, if necessary, correct the data on how the message characteristics are to be processed in the PI sheet.

For hidden characteristics and output values:
    1. Select the message characteristic.
    2. In the Default value group box, specify value assignment for the characteristic.
    3. If required, enter a variable name for the characteristic value in the Variable definition group box and specify the variable’s validity area.

For the value to be calculated:
    1. Select the message characteristic.
    2. In the Value calculation group box, enter the calculation formula to be used to calculate the characteristic value in the PI sheet.
    3. If required, enter a variable name for the characteristic value in the Variable definition group box and specify the variable’s validity area.
  1. Check the process instruction and, if necessary, correct errors (see Checking Process Instructions in the PI Assistant).
  2. When you have finished editing the data, choose Copy and save the master recipe.

If you have not corrected all errors when exiting the process instruction assistant, the error log is displayed. To call up the PI assistant again and correct errors, you must, however, first choose Continue to get back to the process instruction overview.