Phases

A phase is an independent processing action. Automatic and Semi-Automatic phases are run by the control system using phase logic. Phase logic is constructed so that it is automatically configured through phase parameters and enabled and monitored by the AVEVA Batch Management System when recipes are processed.

Manual and Data phases have no phase logic and are run by the AVEVA Batch Management System. Typically, you use a Manual phase to instruct an operator to perform a function such as manually adding an ingredient, or performing a test sample. You can use a Data phase to read or write values to the control system or an external device with operator interaction or formal phase logic.

Some recipe procedures require an operator to acknowledge certain conditions before a phase can be processed. A recipe procedure can also require an operator to acknowledge the completion of a phase. Additionally, a recipe procedure can require the operator to enter comments before batch processing can continue. You can configure all these situations as part of the recipe procedure.

Several examples of process and transfer phases are shown in the following table.

In addition to the types of phases previously described, you can use two special phases at any time in a recipe procedure to reserve ownership of specific units or connections to a batch. These phases are named Allocate and Release. When a unit or connection is allocated, it is owned by the batch until it is released as part of the recipe procedure or the batch finishes, or until an operator manually releases it.

All processes and transfer classes and instances defined in the recipe equipment requirements can be allocated or released. No parameters are associated with Allocate and Release phases.