ABB TU890 3BSC690075R1 模块终端装置基座4CPLC模块触摸屏

ABB TU8903BSC690075R1模拟量输出模块是一款功能强大的工业自动化一控制模块，用于实现模拟信号的输出。

编程算法(一)1、开关量也称逻辑量，指仅有两个取值，0或1、ON或OFF。它是最常用的控制，对它进行控制是PLC的优势，也是PLC最基本的应用。开关量控制的目的是，根据开关量的当前输入组合与历史的输入顺序，使PLC产生相应的开关量输出，以使系统能按一定的顺序工作。所以，有时也称其为顺序控制。而顺序控制又分为手动、半自动或自动。而采用的控制原则有分散、集中与混合控制三种。2、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。PLC是由继电控制引入微处理技术后发展而来的，可方便及可靠地用于开关量控制。由于模拟量可转换成数字量，数字量只是多位的开关量，故经转换后的模拟量，PLC也完全可以可靠的进行处理控制。由于连续的生产过程常有模拟量，所以模拟量控制有时也称过程控制。模拟量多是非电量，而PLC只能处理数字量、电量。所有要实现它们之间的转换要有传感器，把模拟量转换成数电量。如果这一电量不是标准的，还要经过变送器，把非标准的电量变成标准的电信号，如4—20mA、1—5V、0—10V等等。

ABB TU890 3BSC690075R1 module terminal device base 4CPLC module touch screen
ABB TU8903BSC690075R1 analog output module is a powerful industrial automation control module used to output analog signals.
Programming Algorithm (1) 1. Switching quantity, also known as logical quantity, refers to having only two values, 0 or 1, ON or OFF. It is the most commonly used control, and controlling it is the advantage of PLC and also the most basic application of PLC. The purpose of switch quantity control is to generate corresponding switch quantity outputs from the PLC based on the current input combination and historical input sequence of the switch quantity, so that the system can work in a certain order. So, sometimes also known as sequential control. And sequential control can be divided into manual, semi-automatic, or automatic. The control principles adopted include decentralized, centralized, and mixed control. 2. Analog quantity refers to some continuously changing physical quantities, such as voltage, current, pressure, velocity, flow rate, etc. PLC is developed after the introduction of microprocessing technology from relay control, and can be conveniently and reliably used for switch quantity control. Due to the fact that analog signals can be converted into digital signals, which are only multi bit switching signals, the converted analog signals can also be reliably processed and controlled by PLC. Due to the presence of analog variables in continuous production processes, analog control is sometimes referred to as process control. Analog quantities are mostly non electrical quantities, while PLC can only handle digital quantities and electrical quantities. All conversions between them require sensors to convert analog quantities into digital quantities. If this electricity level is not standard, it needs to go through a transmitter to convert the non-standard electricity level into a standard electrical signal, such as 4-20mA, 1-5V, 0-10V, and so on.