PFBK164 3BSE000469R1 ABB

The CPU is mainly composed of an arithmetic unit,a controller,a register and a data,control and status bus that realizes the connection between them.The CPU unit also includes a peripheral chip,a bus interface and related circuits.Memory is mainly used to store programs and data,and is an indispensable component of PLC.

CPU主要由运算器、控制器、寄存器及实现它们之间联系的数据、控制及状态总线构成，CPU单元还包括外围芯片、总线接口及有关电路。内存主要用于存储程序及数据，是PLC不可缺少的组成单元。