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Main points in the definition of a particular controller are:
•
Type of controller to be used, reflecting
–
Security questions such as Hazardous applications, Emergency situations, Abnormal
operating situations, Consequences in the event of a failure, Behavior at start/stop,
Behavior at maintenance, Manual control.
–
CPU performance
–
Capacity requirements
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Dependability questions like Availability, Integrity
–
Need for communication (Need for physical interface).
•
Type of I/O system
Centralized or distributed location of I/O is normally determined at prior and superior
design stages reflecting such questions as Maintenance, Environment, Economy (cable
savings).
•
I/O board assortment. Limitation in number of different types is often desirable.
•
Physical interface to the process. Terminal blocks, Marshalling, Hazardous applications.
•
Application of redundancy.
•
Environmental questions. Special requirement of cabinetry.
•
Mechanical design. Cabinet lay-out.
When the design work reaches this stage, the hardware and the system software for the
controller have been determined. Sufficient information should also be available to permit a
controller system configuration. The information should include a rough estimation of
application functions needed thus facilitating a dimensioning and disposition of the RAM.
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The next step is to make a detailed function identification and to design the application program
based on AMPL. Finally, you implement the program.
To sum up, the main activities are:
•
Circuit identification with respect to
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Standard type circuits (typical solutions)
–
User-defined type circuits
–
User-defined circuits
–
User-defined PC element.
•
Structuring
•
Definition of functional interface to other system
•
Execution control work-through
•
Design of start-up program which include securing of application dynamic data during
power supply disconnection
•
Configuration/Implementation
This is mostly an interactive session using an engineering station.
Some of these activities, subactivities and other similar subjects of interest are dealt with below.
Содержание Advant Controller 450
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Страница 26: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xvi ...
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Страница 496: ...Advant Controller 450 User s Guide Appendix C Delivery Documentation C 2 3BSE 002 415R701 Rev A ...
Страница 508: ...Advant Controller 450 User s Guide Appendix D Item Designations D 12 3BSE 002 415R701 Rev A ...
Страница 514: ...Advant Controller 450 User s Guide Appendix E Current Consumption and Heat Dissipation E 6 3BSE 002 415R701 Rev A ...
Страница 518: ...Advant Controller 450 User s Guide Appendix F Load Calculation F 4 3BSE 002 415R701 Rev A ...
Страница 522: ...Advant Controller 450 User s Guide Appendix G Memory Calculation G 4 3BSE 002 415R701 Rev A ...
Страница 528: ...Advant Controller 450 User s Guide Appendix H Halt Codes H 6 3BSE 002 415R701 Rev A ...
Страница 561: ...Advant Controller 450 User s Guide Index 3BSE 002 415R701 Rev A iii V Valve control 1 102 VT100 terminal 1 105 ...
Страница 562: ...Advant Controller 450 User s Guide Index iv 3BSE 002 415R701 Rev A ...
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Страница 564: ...3BSE 002 415R701 Rev A March 2000 ...