利用PLC进行程序编制时，为了减少指令条数，节省内存和提高运行速度，应掌握以下编程技巧。
(1)把串联触点多的电路编在上方，如图8-4所示，可见（b）形式减少使用ORB指令或多重输出指令等。
(2)并联触点多的电路放在左边，如图8-5所示，可见（b）形式减少使用ANB指令。
(3)多重输出电路，最好将串联接点多的电路放在下边，如图8-6所示，可以不使用MPS、MPP指令等。
(4)如果电路复杂，采用ANB、ORB等指令实现比较困难时，可以重复使用一些触点改成等效电路，再进行编程，如图8-7所示。
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