PO COl如果在下面的例子中用POSCOIL替换PTCOIL(保持其余的逻辑不变，POSCOIL的能流输入也是交替变化)，逻辑行为将会不同。POSCOIL的状态将会受到第四次扫描过程的影响，写入Xsition，改变其状态和跳变位。在这个例中，POSCOIL不会使Xsition转为ON。.如果第四梯级被删除，POSCOIL将和PTCOIL的动作相同，第–次扫描时，Xsition的值转为OFF,第二次扫描时，Xsition的值转为ON,如此等等。.

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