DS200SVAAG1A 模块plc卡件
DS200SVAAG1A 模块plc卡件
DS200SVAAG1A 模块plc卡件
DS200SVAAG1A 模块plc卡件
梯形图是PLC控制系统中使用得最多的图形编程语言,被称为PLC的{dy}编程语言。梯形图与电器控制系统的电路图很相似,具有直观易懂的优点,很容易被工厂电气人员掌握,特别适用于开关量逻辑控制。梯形图常被称为电路或程序,梯形图的设计称为编程。PLC梯形图设计规则(或规范)如下:
(1)触点应画在水平线上,不能画在垂直分支上。应根据自左至右、自上而下的原则和对输出线圈的几种可能控制路径来画。
(2)不包含触点的分支应放在垂直方向,不可放在水平位置,以便于识别触点的组合和对输出线圈的控制路径。
(3)在有几个串联回路相并联时,应将触头多的那个串联回路放在梯形图的最上面。在有几个并联回路相串联时,应将触点最多的并联回路放在梯形图的最左面。这种安排,所编制的程序简洁明了,语句较少。
(3)不能将触点画在线圈的右边,只能在触点的右边接线圈。
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