Diagnosis
This process instruction is of type "process data calculation formula".
You must define the message category to be used for the message thattransfers the calculated value using characteristic &V1&.Characteristic &V1&, however, is not contained in the processinstruction.

Procedure
RESET N1
Assign characteristic PPPI_MESSAGE_CATEGORY to the process instruction.
Assign the desired message category to the characteristic.

Note
You also need to assign the characteristics of the message category tothe process instruction. For detailed information, refer to Extended Help.