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Advant
®
Controller 450 User’s Guide
Chapter 4 Runtime Operation
4-20
3BSE 002 415R701 Rev A
4.1.9.2 Data Area for PC Programs
Each PC program is provided with a local data area for storage of variable values.
4.1.9.3 PC Program
You can divide a control task into a number of functional sections. The division is performed
primarily in accordance with the functional structure of the control task and can also be in
accordance with the requirement of different cycle times in the process. A PC program can
accordingly be divided into function modules and several execution units, which in turn consist
of PC elements.
Each execution unit can be given its own periodicity and its own execution conditions for
connection and disconnection.
PC elements are the smallest “building blocks” in a PC program. They are described in detail in
the manual PC Elements. As an example,
shows the graphical symbol for the PC
element FUNG-1V, a function generator. The figure also gives a rough outline of the supporting
elements for the break-points of the desired function (curve).
shows the desired application function.
Figure 4-12. Example of PC Element: FUNG-1V
FUNG-1V
(C1)
X
BAL
BALREF
XTAB
YTAB
Y
ERR
BALREFO
REG-G
REG-G
1
2
3
4
5
10
11
12
Содержание Advant Controller 450
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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 ...