IC660BBA023 GE

5SHY3545L0003 ABB
UNS2980c-ZV4 ABB
ARC093AV1 ABB
UAC326AE ABB
UAC326AE ABB
GD9924BE ABB
PFXA401SF ABB
IMBLK01 ABB
IMFECI2 ABB
SPDSO14 ABB
SPNIS21 ABB PID
3HAC6157-1 ABB
3HAC5497-1 ABB
3HAB8859-1/03A ABB

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描述

在相同功能和相同I/O点数据的情况下,整体式比模块式价格低。但模块式具有功能扩展灵活,维修方便(换模块),容易判断故障等优点,要按实际需要选择PLC的结构形式。在数控机床出现以前,顺序控制技术在工业生产中已经得到广泛应用。许多机械设备的工作过程都需要遵循一定的步骤或顺序。顺序控制即是以机械设备的运行状态和时间为依据,使其按预先规定好的动作次序顺序地进行工作的一种控制方式。

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