STep programming in S7, a question of a method

[Combo]

Hi,

I have to start-up a project from someone else. He makes steps like this:



"DB aanvoer1".toestemming is needed for start-up in step/step. My question is, how does this work what you can see here. When "DB aanvoer1".toestemming is low, then we jump over the actions (to M051 in this case). When we dont run automatically but in step/step, then "DB scherm".stapknop is high. So I think that, each time we push the start button, "DB aanvoer1".toestemming is high until AN "P303+" is done, because scherm".stapknop is high, aanvoer1".toestemming will be resetted, and we then jump again over the actioncode.

Okay, I think I'm on the right road. When scherm".stapknop is low, and we press start auto, then "DB aanvoer1".toestemming is high and we run through everything, because the JC will not jump.


BUT

Now see this:



Here you can see that no action code is programmed, so this is more a wait step I guess ?



Little question, how do you guys see this, is there a better method to do the same, have automatic mode and step/step possibillity ?