Tim Ganz
Member
When using AB PLC's during the scan cycle instructions are scanned top to bottoma nd left to right correct? How does this work with instructions in branches?
Say my first rung is an XIC and it has 4 branches under it that also have 3 XIC's on each branch would the rung be scanned as my first main rung XIC fist then my first branch and first XIC on the left of that branch and then the other 2 will be scanned moving left to right then down to the next branch left to right unitl all are done?
Then it would hop to the next instruction to the right on the main rung and continue moving right until the end of the rung? Do I have this right?
Does it make a difference if it's a extended branch or a nested branch? Are they scanned the same way?
Say my first rung is an XIC and it has 4 branches under it that also have 3 XIC's on each branch would the rung be scanned as my first main rung XIC fist then my first branch and first XIC on the left of that branch and then the other 2 will be scanned moving left to right then down to the next branch left to right unitl all are done?
Then it would hop to the next instruction to the right on the main rung and continue moving right until the end of the rung? Do I have this right?
Does it make a difference if it's a extended branch or a nested branch? Are they scanned the same way?