DS3800NCVA1A1B驱动器 电源模块 输入输出模块

DS3800NCVA1A1B驱动器 电源模块 输入输出模块

DS3800NCVA1A1B驱动器 电源模块 输入输出模块

存储容量是指用户程序存储器的容量。用户程序存储器的容量大，可以编制出复杂的程序。一般来说，小型PLC的用户存储器容量为几千字，而大型机的用户存储器容量为几万字。

I/O点数

输入/输出(I/O）点数是PLC可以接受的输入信号和输出信号的总和，是衡量PLC性能的重要指标。I/O点数越多，外部可接的输入设备和输出设备就越多，控制规模就越大。

扫描速度

扫描速度是指PLC执行用户程序的速度，是衡量PLC性能的重要指标。一般以扫描1K字用户程序所需的时间来衡量扫描速度，通常以ms/K字为单位。PLC用户手册一般给出执行各条指令所用的时间，可以通过比较各种PLC执行相同的操作所用的时间，来衡量扫描速度的快慢。

DS3800NCVA1A1B驱动器 电源模块 输入输出模块

Storage capacity refers to the capacity of user program memory. The capacity of the user program memory is large, and complex programs can be written. In general, the user memory capacity of a small PLC is several thousand words, while the user memory capacity of a mainframe is tens of thousands of words.

I/O points

Input/output (I/O) points are the sum of the input and output signals that PLC can accept, and are an important indicator to measure PLC performance. The more I/O points, the more externally accessible input and output devices, and the greater the scale of control.

Scanning speed

Scanning speed refers to the speed at which PLC executes user programs and is an important indicator to measure PLC performance. Scanning speed is generally measured in the time required to scan a 1K word user program, usually in ms/K words. The PLC user manual generally gives the time used to execute each instruction, and the scanning speed can be measured by comparing the time used by various PLCS to perform the same operation.