描述
根据PLC梯形图程序扫描原则，按先左后右先上后下的步序，逐句扫描，执行程序。遇到程序跳转指令，根据跳转条件是否满足来决定程序的跳转地址。从用户程序涉及到输入输出状态时，PLC从输入映象寄存器中读出上一阶段采入的对应输入端子状态，从输出映象寄存器读出对应映象寄存器，根据用户程序进行逻辑运算，存入有关器件寄存器中。对每个器件来说，器件映象寄存器中所寄存的内容，会随着程序执行过程而变化
Johnson Controls NU-NCM350-8 NCM-350 Controller Used
Schneider Modicon 110CPU61200 Micro CPU 043506701 New
Modicon DR-D030-001 Servo Drive 1000D DRD030001 New
Ingersoll Rand 99388027R07 Spindle Control Module Used
Texas Instruments 500-7301 Gateway Comm 5007301 New
Reliance Electric 0-52841 Control Card 052841 New
Ingersoll Rand 99387847R01 Spindle Control 99384224R05
Reliance 0-49001-5 Cardpak Power Supply 0490015 New
Krauss Maffei SR501 Control Board SR-501 5089435 New
Reliance Electric 0-52841 PC Board Static Ratio 052841
Honeywell C7012E-1112 120V UV Flame Detector C7012E1112
Allen Bradley 2755-DM9 Bar Code Decoder 2755DM9 New
GE SKHA36AT1200 Spectra RMS Circuit Breaker 1200 Amp 3P
