5.9.2 Procedural control model
Procedural control model with example – how is it something made?
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Equipment phase
An equipment phase is the smallest element of procedural control that can accomplish a
process-oriented task. The purpose of an equipment phase is to define or cause a process-
oriented action.
Characteristics of an equipment phase:
● Can be subdivided into smaller parts in the form of steps and transitions (as described in
IEC 848: 1988).
● A step can cause one or more actions
● The execution of an equipment phase can result in:
– Commands to basic control
– Commands to other equipment phases (either in the same or another equipment entity)
– The collection of data
Technological basics complying with ISA-88.01
5.9 ANSI/ISA-88.01 models
SIMATIC BATCH V8.2
114 Operating Manual, 02/2016, A5E35958174-AA
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