140CPU65260  作为一种特殊的I/O单元

Description

140CPU65260  作为一种特殊的I/O单元

作为一种特殊的I/O单元，它仍具有I/O电路抗干扰、内外电路隔离，与输入输出继电器（或内部继电器，它也是PLC工作内存的一个区。可读写）交换信息等等特点。

这里的A/D中的A，多为电流，或电压，也有为温度。D/A中的A，多为电压，或电流。电压、电流变化范围多为0～5V，0～10V，4～20mA。有的还可处理正负值的。

这里的D，小型机多为8位二进制数，中、大型多为12位二进制数。

A/D、D/A有单路，也有多路。多路占的输入输出继电器多。

有了A/D、D/A单元，余下的处理都是数字量，这对有信息处理能力的PLC并不难。中、大型PLC处理能力更强，不仅可进行数字的加、减、乘、除，还可开方，插值，还可进行浮点运算。有的还有PID指令，可对偏差制量进行比例、微分、积分运算，进而产生相应的输出。计算机能算的它几乎都能算。

140CPU65260  作为一种特殊的I/O单元

As a special I/O unit, it still has I/O circuit anti-interference, internal and external circuit isolation, and input/output relay (or internal relay, it is also an area of the PLC operating memory. Readability) exchanging information and so on.

The A in A/D here is mostly current, or voltage, but also temperature. A in D/A is mostly voltage or current. The range of voltage and current is mostly 0 ~ 5V, 0 ~ 10V, 4 ~ 20mA. Some can also handle positive and negative values.

Here D, minicomputers are mostly 8-bit binary numbers, and medium and large machines are mostly 12-bit binary numbers.

A/D and D/A have either a single path or multiple paths. Multiple input/output relays.

With A/D and D/A units, the rest of the processing is a digital quantity, which is not difficult for a PLC with information processing capability. Medium and large PLC processing capacity is stronger, not only for the addition, subtraction, multiplication, division of numbers, but also for the root, interpolation, but also for floating point operations. Some also have PID instructions, which can carry out proportional, differential and integral operations on the deviation measure, and then produce the corresponding output. It can do almost anything a computer can do.