plc的一些硬件手册，编程的基础，必须看懂和了解的，希望对大家有用-some of the hardware manual plc, programming base, we must understand and know, want to be useful

plc的一些硬件手册，CPU组成部分，必须看懂和了解的，希望对大家有用-some of the hardware manual plc, programming base, we must understand and know, want to be useful