S5-90U/S5-95U
Integrated Blocks and Their Functions
9.1.2
Interrupt-Driven Program Execution (OB3)
Function of OB3
OB3 includes the control program section for the response to a process interrupt or a completed
count procedure.
Calling OB3
OB3 can be called due to a certain process interrupt or when a comparison value of the onboard
counter is reached.
Prerequisites for OB3 Execution
Interrupt-driven program execution using OB3 is possible only if the following requirements are met:
•
The interrupt input(s) is/are enabled (parameterized) in DB1.
•
The counter input(s) is/are enabled (parameterized) in DB1.
•
OB3 is programmed.
•
Interrupt processing is not disabled by STEP 5 operation IA (see Section 8.2.8).
•
The PLC is in the "POWER ON" state and switched to "RUN".
Interrupting OB3 Execution
The interrupt-driven execution of OB3 cannot be interrupted.
However, OB3 is able to interrupt a cyclic or time-controlled program.
Note
Even for interrupt-driven program execution, the maximum of 16 nesting levels must not
be exceeded.
9.1.3
Time-Controlled Program Execution (OB13; for S5-95U only)
Function of OB13
OB13 includes a control program section that must be processed periodically.
The call interval can be parameterized in DB1. Times from 10 ms to 655350 ms (in steps of 10 ms)
can be set.
The default for the call interval is 100 ms.
Calling OB13
OB13 is called automatically by the operating system after a certain time has elapsed.
EWA 4NEB 812 6115-02b
9-3
Содержание SIMATIC S5-90U
Страница 3: ...SIMATIC S5 S5 90U S5 95U Programmable Controller System Manual EWA 4NEB 812 6115 02b Edition 03 ...
Страница 6: ...EWA 4NEB 812 6115 02b ...
Страница 16: ...EWA 4NEB 812 6115 02b ...
Страница 23: ......
Страница 32: ...EWA 4NEB 812 6115 02b ...
Страница 46: ...EWA 4NEB 812 6115 02b ...
Страница 50: ......
Страница 51: ......
Страница 52: ......
Страница 53: ......
Страница 54: ......
Страница 55: ......
Страница 57: ......
Страница 58: ......
Страница 59: ......
Страница 64: ......
Страница 65: ......
Страница 66: ......
Страница 67: ......
Страница 89: ......
Страница 102: ...EWA 4NEB 812 6115 02b ...
Страница 118: ...EWA 4NEB 812 6115 02b ...
Страница 242: ...EWA 4NEB 812 6115 02b ...
Страница 288: ...EWA 4NEB 812 6115 02b ...
Страница 300: ...EWA 4NEB 812 6115 02b ...
Страница 362: ...EWA 4NEB 812 6115 02b ...
Страница 536: ...EWA 4NEB 812 6115 02b ...
Страница 538: ...EWA 4NEB 812 6115 02b ...
Страница 540: ...EWA 4NEB 812 6115 02b ...
Страница 562: ...EWA 4NEB 812 6115 02b ...
Страница 564: ...EWA 4NEB 812 6115 02b ...
Страница 590: ...EWA 4NEB 812 6115 02b ...
Страница 596: ...EWA 4NEB 812 6115 02b ...
Страница 598: ...EWA 4NEB 812 6115 02b ...
Страница 604: ...EWA 4NEB 812 6115 02b ...
Страница 606: ...EWA 4NEB 812 6115 02b ...
Страница 608: ...EWA 4NEB 812 6115 02b ...
Страница 610: ...EWA 4NEB 812 6115 02b ...
Страница 620: ...EWA 4NEB 812 6115 02b ...