品牌:福克斯波罗 | 规格:P0940AX | 材质:P0940AX |
产地:美国 |
福克斯波罗模块卡件【P0940AX】产品简介:
顺序控制是生产现场常见的一类控制任务,步进指令是PLC指令库中于顺序控制的。步进指令编程时,根据工艺流程将程序划分为一个个的程序段,执行时,CPU严格按梯形图编程顺序,只有执行完前一段程序后才能激活下一段程序,并在下一段程序执行之前,将前面程序段复位。并且在语法上要求各程序段所使用的输出不允许重复。
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