BENTLY NEVADA 176449-01 3500/40M

• 型号：176449-01 3500/40M


• 数量：3


• 制造商：　厦门兴锐达自动化设备有限公司


• 有效期：2019/10/10 0:00:00

BENTLY NEVADA 176449-01 3500/40M

BENTLY NEVADA 176449-01 3500/40M

BENTLY NEVADA 176449-01 3500/40M

开始研制出产的 PLC首要用于代替传统的由继电器接触器构成的控制设备，但这两者的工作办法是不相同的：

   (1)继电器控制设备选用硬逻辑并行工作的办法，即假设这个继电器的线圈通电或断电，该继电器全部的触点（包括其常开或常闭触点）在继电器控制线路的哪个方位上都会当即一同动作。

   (2)PLC的CPU则选用次序逻辑扫描用户程序的工作办法，即假设一个输出线圈或逻辑线圈被接通或断开，该线圈的全部触点(包括其常开或常闭触点)不会当即动作，有必要等扫描到该触点时才会动作。

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