Message Characteristics: Value to be Calculated 

Features

When defining the value to be calculated, you must enter the following information in the process instruction (see graphic below):

If required, you can also specify a unit of measurement for the calculated value. In the PI sheet, the unit is displayed after the value.

To enter this information, you assign the following characteristics to the process instruction in the sequence specified below:

Characteristic

Meaning

Allowed values

PPPI_INPUT_REQUEST

Text displayed before the formula result

Any short text

PPPI_CALCULATED_VALUE

Message characteristic to be calculated

Message characteristic

PPPI_CALCULATION_FORMULA

Calculation formula

Arithmetic expression;
see Syntax

PPPI_UNIT_OF_MEASURE

Unit of measurement

Any unit of measurement

 

In the case of text characteristics (for example, PPPI_INPUT_REQUEST), you can insert the value of another characteristic into this text using a text symbol; see Text Symbols Within Characteristic Texts.

See also:

Process Data Calculation Formula / Message Category - Example

Additional Function

If you want to use the characteristic value in a subsequent process instruction of the same process order, you can define a variable that refers to this message characteristic; see Definition of Variables.