Type 0: Definition of Phase Sequences

Use

You can use this function to determine that the process operator may not process a certain phase in the PI sheet until another phase or several other phases have been completed.

Notes on Using Sequence Definitions

You must always insert the definition of phase sequences at the start of a phase before the other process instructions.
The definition of phase sequences has been designed to transfer the phase relationships defined in a process order to the corresponding PI sheets. Sequence definitions are generated automatically if you have made the corresponding settings in Customizing for the Control Recipe Destination . The value of the characteristic PPPI_PREDECESSOR is assigned automatically during the generation process.
Do not use the definition of phase sequences in combination with hidden data requests. If hidden data requests are used at the start of a phase, the corresponding messages may be created at the wrong time or not created at all because their phase is still locked when the previous message is sent.

Activities

You assign the following characteristic to the process instruction:

Characteristic	Meaning	Allowed Values
PPPI_PREDECESSOR	Number of the phase that has to be processed first (predecessor phase)	Number of a phase in the current order for the same PI sheet

If a phase has several predecessors, characteristic PPPI_PREDECESSOR must be created for each predecessor phase in the process instruction.