4.4.1
Cyclic Program Execution
With programmable controllers, cyclic program execution (program
execution level CYCLE) is the main mode.
Triggering
If the CPU has completed the start-up program without errors, it then
begins cyclic program execution.
Principle
The principle of cyclic program execution (system activities):
F r o m s t a r t - u p
Tr i g g e r c y c l e m o n i t o r i n g t i m e
Up d a t e I P C i n p u t f l a g s
S u p p l y p r o c e s s i m a g e o f t h e
i n p u t s ( P I I )
Ca l l c y c l i c u s e r p r o g r a m ( O B 1 )
U s e r p r o g r a m
o t h e r p r o g r a m
e x e c u t i o n l e v e l s
i n c l u d i n g n e s t i n g i n o f
O u t p u t p r o c e s s i m a g e o f t h e
o u t p u t s ( P I Q )
Up d a t e I P C o u t p u t f l a g s
S y s t e m a c t i v i t i e s e . g .
l o a d i n g o r d e l e t i n g b l o c k s
c o m p r e s s i n g b l o c k s . . .
Fig. 4-6
Cyclic program execution
RUN Mode
CPU 948 Programming Guide
4 - 30
C79000-G8576-C848-04
Содержание CPU 948
Страница 10: ...Contents CPU 948 Programming Guide 1 2 C79000 G8576 C848 04 ...
Страница 32: ...Contents CPU 948 Programming Guide 2 2 C79000 G8576 C848 04 ...
Страница 72: ...Data Blocks CPU 948 Programming Guide 2 42 C79000 G8576 C848 04 ...
Страница 74: ...Contents CPU 948 Programming Guide 3 2 C79000 G8576 C848 04 ...
Страница 154: ...Contents CPU 948 Programming Guide 4 2 C79000 G8576 C848 04 ...
Страница 200: ...Contents CPU 948 Programming Guide 5 2 C79000 G8576 C848 04 ...
Страница 308: ...Contents CPU 948 Programming Guide 7 2 C79000 G8576 C848 04 ...
Страница 324: ...Examples of Parameter Assignment CPU 948 Programming Guide 7 18 C79000 G8576 C848 04 ...
Страница 326: ...Contents CPU 948 Programming Guide 8 2 C79000 G8576 C848 04 ...
Страница 370: ...Addressable System Data Area CPU 948 Programming Guide 8 46 C79000 G8576 C848 04 ...
Страница 372: ...Contents CPU 948 Programming Guide 9 2 C79000 G8576 C848 04 ...
Страница 404: ...Operations with the Base Address Register BR Register CPU 948 Programming Guide 9 34 C79000 G8576 C848 04 ...
Страница 486: ...Contents CPU 948 Programming Guide 11 2 C79000 G8576 C848 04 ...
Страница 522: ...PG Functions via the S5 Bus CPU 948 Programming Guide 11 38 C79000 G8576 C848 04 ...
Страница 524: ...Contents CPU 948 Programming Guide 12 2 C79000 G8576 C848 04 ...
Страница 538: ...Contents CPU 948 Programming Guide 13 2 C79000 G8576 C848 04 ...
Страница 546: ...List of Key Words CPU 948 Programming Guide Index 6 C79000 G8576 C848 04 ...