Hi again, a real basic question here, I just want to confirm something.
My ladder logic has a few subroutine call instructions (JSR) in Ladder 2. The subroutines are Ladders 8, 9, and 10, which all contain a normal END instruction on the last rung. (I understand this is the same as using a RET instruction)
When the scan of ladder 2 through 7 has completed, does the unit skip over scanning Ladders 8-10 before scanning subsequent ladders, then executing the logic and repeating the scan? Does it know NOT to scan the subroutine ladders a 2nd time?
My ladder logic has a few subroutine call instructions (JSR) in Ladder 2. The subroutines are Ladders 8, 9, and 10, which all contain a normal END instruction on the last rung. (I understand this is the same as using a RET instruction)
When the scan of ladder 2 through 7 has completed, does the unit skip over scanning Ladders 8-10 before scanning subsequent ladders, then executing the logic and repeating the scan? Does it know NOT to scan the subroutine ladders a 2nd time?