Appendix A Glossary
117
parameter expression
An arithmetic expression that may be assigned to an input parameter
or output parameter of a phase, operation, or unit procedure step that
can reference other parameters and recipe header data within a recipe.
The expression is evaluated and the result stored as the value of the
parameter.
path (stream)
The order of equipment within a process cell that is used, or is
expected to be used, in the production of a specific batch.
paused
Paused is a possible state of the Firing attribute of a transition. When
the transition is in the Paused state, it’s expression has evaluated to
TRUE and it is ready to fire. It is suspended the firing process due to
the parent procedure being in SEMI-AUTO mode. It is awaiting either
a RESUME command or a transition of the parent procedure to AUTO
mode before continuing with the firing process.
pending
Pending is a possible state of the Firing attribute of a transition. When
the transition is in the Pending state, it is waiting for one or more
prior steps to transition into a legal state for a Transfer of Control
operation.
phase
The lowest level procedural element in the procedural control model.
The phase provides an interface to basic control.
phase link group
Group that identifies phases that may communicate and work
together.
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