Message Characteristics: Automatic Value Assignment 
Message Characteristics: Automatic Value Assignment
Use
The system can determine the date and time when a process message was created in the PI sheet. If you want to transfer these values directly to the process message, you set the indicator for automatic value assignment for the corresponding message characteristics in the process instruction.
Features
Basic Functions
The system can only automatically assign the date or time to the standard characteristics PPPI_EVENT_DATE and PPPI_EVENT_TIME.
You allocate the characteristics whose values are assigned automatically to the process instruction as follows:
Characteristic |
Meaning |
Value |
PPPI_AUTOMATIC_VALUE |
Characteristic value to be assigned automatically |
PPPI_EVENT_DATE |
The system determines the date and time when you maintain the process instruction in the PI sheet.
See also:
Process Data Request / Message Category - Example Process Data Calculation Formula / Message Category - ExampleAdditional Functions
You cannot change characteristic values that have been assigned automatically in the PI sheet. However, you can display the message value in the PI sheet if you also mark the characteristic as an output value, see
Output Values.If you want to use the date or time in one of the succeeding process instructions of the same process order, you can define a variable that refers to the message characteristic; see
Definition of Variables.
In process data requests, you can also mark the date and time as input values. The system then proposes the current date and time in the possible entries. Unlike automatic value assignment, however, you can still change the value.