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Make2Pack definitions and descriptions for types of control
Yesterday's posting (A line in the sand: Equipment Phase) explained that the Make2Pack ISA88 Part 5 effort continues working with three types of control. Here are more details.
Equipment phase control
Equipment Phase Control is a type of control component that handles the exposing of a phase interface and the interfacing of the phase commands and controls to other control components. This control component is primarily coordination control and provides the interface to the Procedure Phase or Operation, depending on how these layers are implemented.
Note: IEC 61131-3 documents methods of defining sequenced control, such as Sequential Function Charts (SFCs), commonly used to implement equipment phase control.
The state model for equipment phase control is the procedure state model defined in Part 1.
Equipment sequenced control
Equipment Sequenced Control is a type of control component that is responsible for the sequential set of equipment oriented actions required to implement equipment principal control. Equipment Sequenced Control is sequential in nature and has quiescent state(s) that typically require an external command to become active or to move from state to state.
Note: IEC 61131-3 documents methods of defining sequenced control, such as Sequential Function Charts (SFCs), commonly used to implement equipment sequenced control.
The state model for equipment sequenced control is function-specific and is generally different from the procedure state model defined in Part 1.
Equipment basic control
Equipment Basic Control is a type of control component that is responsible for implementing basic control, any associated coordination control, and interfacing to the physical equipment (device(s)). Equipment Basic Control is persistent and always active and performs its function based on inputs from the equipment/process, higher levels of control or humans.
Equipment control
Equipment control is the logic or code that implements the Process Task Strategy (as defined in Part 1). There are three types of Control Components that make up equipment control; Equipment Phase Control, Equipment Sequence Control, and Equipment Basic Control. Equipment control can be very simple, consisting only of a single Equipment Phase Control entity that manages a single Basic Control Entity, to quite complex structures with many interactive control components using all types of control.
Coordination control
This is still a work in progress to adequately describe and define what it means within all of the different part of our model.
Feel free to submit your thoughts using the post a comment tool provided!
Make2Pack definitions and descriptions for types of control
March 31, 2008
Yesterday's posting (A line in the sand: Equipment Phase) explained that the Make2Pack ISA88 Part 5 effort continues working with three types of control. Here are more details. |
Equipment phase control
Equipment Phase Control is a type of control component that handles the exposing of a phase interface and the interfacing of the phase commands and controls to other control components. This control component is primarily coordination control and provides the interface to the Procedure Phase or Operation, depending on how these layers are implemented.
Note: IEC 61131-3 documents methods of defining sequenced control, such as Sequential Function Charts (SFCs), commonly used to implement equipment phase control.
The state model for equipment phase control is the procedure state model defined in Part 1.
Equipment sequenced control
Equipment Sequenced Control is a type of control component that is responsible for the sequential set of equipment oriented actions required to implement equipment principal control. Equipment Sequenced Control is sequential in nature and has quiescent state(s) that typically require an external command to become active or to move from state to state.
Note: IEC 61131-3 documents methods of defining sequenced control, such as Sequential Function Charts (SFCs), commonly used to implement equipment sequenced control.
The state model for equipment sequenced control is function-specific and is generally different from the procedure state model defined in Part 1.
Equipment basic control
Equipment Basic Control is a type of control component that is responsible for implementing basic control, any associated coordination control, and interfacing to the physical equipment (device(s)). Equipment Basic Control is persistent and always active and performs its function based on inputs from the equipment/process, higher levels of control or humans.
Equipment control
Equipment control is the logic or code that implements the Process Task Strategy (as defined in Part 1). There are three types of Control Components that make up equipment control; Equipment Phase Control, Equipment Sequence Control, and Equipment Basic Control. Equipment control can be very simple, consisting only of a single Equipment Phase Control entity that manages a single Basic Control Entity, to quite complex structures with many interactive control components using all types of control.
Coordination control
This is still a work in progress to adequately describe and define what it means within all of the different part of our model.
Feel free to submit your thoughts using the post a comment tool provided!
Posted by David Chappell on March 31, 2008 | Comments (0)
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