ABB分散控制系统PFSK130 3BSE002616R1备件工业DCS模块卡件

ABB分散控制系统PFSK130 3BSE002616R1备件工业DCS模块卡件

ABB分散控制系统PFSK130 3BSE002616R1备件工业DCS模块卡件

1）MC、MCR指令的目标元件为Y和M，但不能用特殊辅助继电器。MC占3个程序步，MCR占2个程序步；

2）主控触点在梯形图中与一般触点垂直。主控触点是与左母线相连的常开触点，是控制一组电路的总开关。与主控触点相连的触点必须用LD或LDI指令。

3）MC指令的输入触点断开时，在MC和MCR之内的积算定时器、计数器、用复位/置位指令驱动的元件保持其之前的状态不变。非积算定时器和计数器，用OUT指令驱动的元件将复位，22中当X0断开，Y0和Y1即变为OFF。

4）在一个MC指令区内若再使用MC指令称为嵌套。嵌套级数最多为8级，编号按N0→N1→N2→N3→N4→N5→N6→N7顺序增大，每级的返回用对应的MCR指令，从编号大的嵌套级开始复位。

1) The target components of MC and MCR instructions are Y and M, but special auxiliary relays cannot be used. MC takes 3 program steps and MCR takes 2 program steps.

2) The main control contact is perpendicular to the general contact in the ladder diagram. The main control contact is a normally open contact connected to the left bus, which is the main switch that controls a group of circuits. The contact connected to the master contact must use LD or LDI command.

3) When the input contact of the MC instruction is disconnected, the integration timer, counter, and components driven by the reset/set instruction within the MC and MCR remain in their previous state. Non-integrating timers and counters, components driven by the OUT instruction will reset, 22 when X0 is disconnected, Y0 and Y1 become OFF.

4) The use of MC instructions in an MC instruction area is called nesting. The number of nested levels is increased by N0→N1→N2→N3→N4→N5→N6→N7, and the return of each level is reset with the corresponding MCR instruction, starting from the nested level with the largest number.