period changing of cyclic OB (OB30-38)

H-H

Hello KvdM,

The execution time of cyclic interrupts is a CPU parameter. You can't edit this parameter in your program.

However you can see that this parameter has a blue text which means that you can edit this parameter without stopping the H system.

SIMATIC Fault-tolerant systems S7-400H

14.7.1 Editing CPU parameters

Only certain CPU parameters (object properties) can be edited in operation. These are highlighted in the screen forms by blue text.

One idea you can use is to make a scheduler in your program.
You can set a cycle time of 20 msec (for instance) and based on your schedule you canchange execution time in multiple of 20 msec (e.g. 20 msec, 40 msec,60 msec and so on).

Best regards.

H-H

Hi

I apologize for my delay.

you can use SET_CINT function that places in extended instruction part to change cyclic interrupt parametrs.