Message Characteristic: Value Assignment Using Variable

Use

The value of a message characteristic can be obtained from a preceding process instruction for the same PI sheet or the same PI sheet if it has been defined as a variable in this process instruction. In the data request, the message characteristic needs to be assigned to the characteristic PPPI_EXTERNAL_VALUE. The variable whose value is to be assigned to the characteristic has to be specified before the message characteristic.

Note Note

You cannot have both manual value assignment to message characteristics and value assignment using a variable within the same process instruction.

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Assign the following characteristics:

Characteristic

Meaning

Allowed values

PPPI_DEFAULT_VARIABLE

Variable to be assigned to message characteristic

Variable name, see

Use of Variables

PPPI_EXTERNAL_VALUE

Message characteristic whose value is to be assigned using variable

Message characteristic

Note Note

Unlike manual value assignment, the value obtained via the characteristic PPPI_DEFAULT_VARIABLE is not proposed as a default value here. Instead, it is directly transferred to the process message, that is, you cannot change it in the PI sheet.

End of the note.