Technical data

Organization blocks for controlling program execution
Block Function and call criterion
OB 1 Organization of cyclic program execution;
first call after a start-up, then cyclic call
OB 2 Organization of interrupt-driven program
execution;
Call by interrupt signal of S5 bus (process
interrupt)
OB 3 to OB 5 Not used with the CPU 928B
OB 6
Delay interrupt (from Version -3UB12)
OB 7, OB 8
Not used with the CPU 928B
OB 9
Processing clock-controlled time interrupts
OB 10
OB 11
OB 12
OB 13
OB 14
OB 15
OB 16
OB 17
OB 18
Time interrupts with fixed intervals:
call every 10 ms
call every 20 ms
call every 50 ms
call every 100 ms
call every 200 ms
call every 500 ms
call every 1 s
call every 2 s
call every 5 s
Table 2-1 Overview of the organization blocks for program execution
Program, Organization and Sequence Blocks
CPU 928B Programming Guide
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