【摘要】 由于该系列PLC解算梯形图流程的特殊性，容易引起控制电路中电气联锁环节的失效。本文详细分析了故障产生的原因，并提出两种解决方案。更多还原

【Abstract】 ： Owing to the peculiarities of the PLC Ladder Logic graphic, there may well be the possibilities of the invalidation in the electric chain lock on the circuit . This paper in particular trys to analyze the cause of the creation of the breakdown and at the same time provide us with two solutions.更多还原