Cyclic interrupt (OB 35) - Siemens S7-300PLC organization block OB

Set or modify the interval (default is 100ms) from the programming tool. Ranging from lms ~ lmin.
 
When allowed to interrupt the cycle, OB35 cycle run at regular intervals.

 
When OB1 OB35 run to set time, OB 35 is executed again.

 
When using OB 35 properties, should ensure that the value of the interval is set longer than the running time of OB 35 in the program, or cause abnormal system, the operating system calls an asynchronous error OB 80.

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