当 PLC 投入运行时，首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入 I/O 映象区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后按指令的规定执行逻辑或算数运算的结果送入 I/O 映象区或数据寄存器内。
OILGEAR L719182011 HYDRAULIC VARIABLE PUMP, NIB
ROCKBESTOS SUPERNANT FIREWALL III XHHW-2 POWER & LIGHTI
CONE DRIVE HU50-3 GEAR REDUCER, RATIO 70:1
EX-CELL-O CORP / CONE DRIVE HU50-1 GEAR REDUCER, RATIO
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GARDNER DENVER INVINCIBLE AIRFLOW SYSTEM 7121 TurboFlow
EMERSON BRUSHLESS PERMANENT MAGNET SERVO MOTOR BLM-8800
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RELIANCE ELECTRIC 24C4215U GENERAL PURPOSE AC DRIVE, 15
ALLEN BRADLEY 151176 1336 BASE DRIVER PCB, NIB, FACTORY
GENERAL ELECTRIC FVK464R 200 Amp FLEX-A-PLUG BUS PLUG,
TAYLOR-HOBSON DPM001-D DATA PROCESSING MODULE, IN CASE,
K.J.LAW ENGINEERS INC 118481 VERIMET 7700 FLAW DETECTOR
ALLEN BRADLEY 2100 Series Size 3 FVNR Starter MCC Bucke
ALLEN BRADLEY 2100 Series Size 3 FVNR Starter MCC Bucke
KLA-TENCOR U500 ULTRA 690D1470 REV C CONTROL BOARD, MAN
FANUC 0370206 GEAR REDUCER
SCHNEIDER NUM 9Y KW AC SPINDLE MOTOR AMS100GB1R22CR1
SCHNEIDER NUM 30kW AC SERVO DRIVE MDLS2075N00A
