
Integrated Blocks and Their Functions
S5-90U/S5-95U
Prerequisites for OB21/OB22 Execution
Restart processing using the OB21 is possible only if the following requirements are met:
•
OB21 is programmed.
•
The PLC is in the "POWER ON" state.
Restart processing using the OB22 is possible only if the following requirements are met:
•
OB22 is programmed.
•
The PLC is in the "POWER ON" state.
•
The PLC was in the "RUN" mode prior to "POWER OFF".
•
The operating mode switch is set to RUN after power recovery and battery backup is provided.
Interrupting Execution of the OBs
The restart OBs cannot be interrupted and cannot interrupt any other program sections on their part.
9.1.5
Retriggering the Scan Time (OB31; for S5-95U only)
Function of OB31
By calling OB31, the scan time monitor can be retriggered (re-initiated) at any point of control
program execution.
This may become necessary when the actual scan time exceeds the monitoring time of approx.
300 ms, e.g. due to a loop in program execution.
The OB31 used in the S5-95U is already programmed. It cannot be programmed by the user.
The runtime for the OB31 in the S5-95U is approx. 45
µ
s.
Calling OB31
The call of OB31 must be explicitly programmed in your control program.
Prerequisites for OB31 Execution
Retriggering of the scan time using OB31 is possible only if the following requirements are met:
•
OB31 is called in your control program.
•
The PLC is in the "POWER ON" state and switched to "RUN".
Interrupting OB31 Execution
OB31 cannot be interrupted.
9-6
EWA 4NEB 812 6115-02b
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 ...