6/3/2020 6:07 AM | |
Joined: 12/18/2014 Last visit: 9/22/2024 Posts: 33813 Rating: (4201) |
For me make this program code no sense. |
6/3/2020 9:39 AM | |
Joined: 10/7/2005 Last visit: 9/22/2024 Posts: 3021 Rating: (1054)
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Hi LuDis it certainly is a bit of an unorthodox way of programming, but will actually work as followed: To start with, note that Input 2.7 is part of the Process Image which is an internal memory area that is updated with the status of the physical Inputs before OB1 starts it scan. All logic in OB1 that is called before this piece of code will see the the "real" status of the physical Input 2.7. All logic in OB1 that is called after this piece of code will see Input 2.7 status with an additional 1sec off delay time applied (i.e. it is on right away when the physical input comes on and stays on for an additional second when the physical input goes off). It would have been far neater to assign T15's status to a memory bit instead of back to E2.7, but it'll work either way. |
Cheers |
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