描述
依据工厂生产工艺流程和复杂程度确定系统规模的大小。可分为大、中、小三种规模。小规模PLC控制系统:单机或者小规模生产过程，控制过程主要是条件、顺序控制，以开关量为主，并且I/O点数小于128点。一般选用微型PLC,如SIEMENSS7-200等。
NEW Allen Bradley 1746-NIO4I Analog Combination Module
USED Perceptron 96K DSP Frame Grabber 495-0191 Rev R
Allen Bradley 1770-KF2 Data Communication Interface
USED Warner Electric SLO-SYN SS2000D6i Warpdrive
USED Allen Bradley 2711-T10C15 PanelView 1000 FRN 4.41
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Electronic Operator Interface Terminal
