描述
执行程序阶段。用户程序执行阶段，PLC按照梯形图的顺序，自左而右，自上而下的逐行扫描，在这一阶段CPU从用户程序的第一条指令开始执行直到最后一条指令结束，程序运行结果放入输出映像寄存器区域。在此阶段，允许对数字量I/O指令和不设置数字滤波的模拟量I/O指令进行处理，在扫描周期的各个部分，均可对中断事件进行响应。
Apollo Computer Excelan EXOS 302 Controller Board VME
Apollo Computer Domain Ring Board VMEbus VME
AP Tech AP1810 Pressure Regulator AP1810S-3P-660P NEW
Antec / Lightwave Communications LLMM Chassis VME
Ames 5772 Clinitek 100 Urine Chemistry Analyzer
AMCI Advanced Micro Controls Inc. DC425-1003 DuraCoder
Alliance Sys CSU DSU Adit 600 TDM Control FXS Modules
Allen Bradley SLC 500 Programmable Controller DH-485
Advance Automation Model MF2 Cylinder I-4X4-MF2-NC-1-#2
Adtran TSU 600e Modular 1/FT1 Multiplexer PN: 1202076L1
ADC Soneplex Ver. G HLXR Module Remote HDSL Interface
ADC Soneplex Ver. D HLXR Module Remote HDSL Interface
Adaptec AHA-2740A AHA-2740A/42A/40AT/42AT SCSI Adapter
Acromag AVME947x / AVME9475 VMEBUS Industrial I/O Board
