Description
在用户程序执行阶段,可编程逻辑控制器总是按由上而下的顺序依次地扫描用户程序(梯形图)。在扫描每一条梯形图时,又总是先扫描梯形图左边的由各触点构成的控制线路,并按先左后右、先上后下的顺序对由触点构成的控制线路进行逻辑运算,然后根据逻辑运算的结果
Aquabot Duramax Pool Cleaner Power Supply 7198D New
Lennox LSS-40 Rectangle Steel Face Black LSS-PT40B New
Lennox LSS-40 Arched Steel Face Black LSS-PA40B New
DeLaRue 2800 Series Main Control PCB D603188
Haug EN-C Static Power Supply 01.7810.00 New
Illumination Technologies Lightlines Linear Illuminatio