07AC91D 模拟转换为数字量

基本信息

扩展产品类型：07AC91

产品编号：GJR5252300R0101

ABB型号名称：07AC91

唰唰：4013614267666

目录说明：07AC91：AC31，模拟量量I/O模块

详细描述：07AC91：AC31，模拟量I/O模块8AC，24VDC，交流：U/I，12位+符号，1线

开关量为通断信号，无源信号，电阻测试法为电阻0或无穷大；主要指开入量和开出量，是指一个装置所带的辅助触点，譬如电机的温控器所带的继电器的辅助触点（电机超温后变位）、阀门凸轮开关所带的辅助触点（阀门开关后变位），接触器所带的辅助触点（接触器动作后变位）、热继电器（热继电器动作后变位），这些点一般都传给PLC，电源一般是由PLC或综保装置提供的，自己本身不带电源，所以叫无源开关量接点，也叫PLC的开关量。

07AC91也可以是有源信号，专业叫法是阶跃信号，就是0或1，可以理解成脉冲量，多个开关量可以组成数字量。

模拟量

模拟量是指一些连续变化的物理量，如电压、电流、压力、速度、流量等信号量，模拟信号是幅度随时间连续变化的信号，通常电压信号为0~10V，电流信号为4~20mA，可以用PLC的模拟量模块进行数据采集，其经过抽样和量化后可以转换为数字量。

数字量

通常所说的数字量是“0”和“1”组成的信号类型，通常是经过编码后的有规律的信号。对于开关量来说，触点闭合可以认为是“1”，触点断开是“0”，作为数字量采集信号。模拟量可以设置临界值量化，小于临界值为“0”，大于等于临界值为“1”。

二.区别

1.数字量定义为：在时间和数值上都是断续变化的离散信号。

模拟量定义为：在时间和数值上都是连续变化的信号。

2.开关量：反映的是状态信号（如开关开、合）。

模拟量：反映的是电量测量数值（如电流、电压）。

07AC91D 模拟转换为数字量

Basic information

Extended product type: 07AC91

Product number: GJR5252300R0101

ABB model name: 07AC91

Shua: 4013614267666

Directory Description: 07AC91:AC31, analog volume I/O module

Description: 07AC91: AC31, analog I/O module 8AC, 24VDC, AC: U/I, 12 bit + symbol, 1 line

The switching quantity is the on-off signal, the passive signal, the resistance test method is the resistance 0 or infinity; It mainly refers to the amount of opening and opening, which refers to the auxiliary contact with a device, such as the auxiliary contact with the relay of the motor thermostat (after the motor overtemperature change), the auxiliary contact with the valve CAM switch (after the valve switch change), the auxiliary contact with the contactor (after the contactor action change), the thermal relay (after the thermal relay action change), the auxiliary contact with the contactor (after the contactor action change). These points are generally passed to the PLC, the power supply is generally provided by the PLC or comprehensive protection device, and it does not have a power supply itself, so it is called passive switching contact, also known as the switching quantity of the PLC.

07AC91 can also be an active signal, the professional name is a step signal, that is, 0 or 1, which can be understood as a pulse quantity, and multiple switching quantities can be composed of digital quantities.

Analog quantity

Analog refers to some continuous change of physical quantities, such as voltage, current, pressure, speed, flow and other semaphore, analog signal is the amplitude of continuous change with time signal, usually the voltage signal is 0~10V, the current signal is 4~20mA, can use the PLC analog module for data acquisition, which can be converted to digital quantity after sampling and quantization.

Digital quantity

The number quantity is usually a signal type composed of "0" and "1", which is usually a regular signal after coding. For the switching quantity, the contact closure can be considered as "1", and the contact break is "0", which is used as a digital quantity to collect the signal. The analog quantity can be quantized by the critical value, less than the critical value is "0", greater than or equal to the critical value is "1".

Ii. Difference

1. A digital quantity is defined as a discrete signal that changes intermittently in both time and value.

An analog is defined as a signal that is continuously changing in both time and value.

2. Switching quantity: reflects the status signal (such as switching on and off).

Analog quantity: reflects the measured value of electricity (such as current, voltage).