title: Correct use of Condition Flags in PLC
body: <p>A PLC documentation (Omron) shows a correct and incorrect use of Condition Flags (see image). But I do not see any difference between the two: if Instruction A is ON, then both Instruction B and the un-labeled instruction will be executed. Both ladder diagram implies achieve the same thing to me. Why one is incorrect and the other is correct? </p>
  
  <p><img src="https://i.stack.imgur.com/bBbRw.png" alt="enter image description here"></p>