5X00594G01 一般用于系统工艺过程较为固定的小型控制系统中

Description

5X00594G01 一般用于系统工艺过程较为固定的小型控制系统中

5X00594G01模块
随着PLC技术的发展，PLC产品的种类也越来越多。不同型号的PLC，其结构形式、性能、容量、指令系统、编程方式、价格等也各有不同，适用的场合也各有侧重。因此，合理选用PLC，对于提高PLC控制系统的技术经济指标有着重要意义。
PLC的选择主要应从PLC的机型、容量、I/O模块、电源模块、特殊功能模块、通信联网能力等方面加以综合考虑
PLC机型的选择
PLC机型选择的基本原则是在满足功能要求及可靠、维护方便的前提下，力争佳的性能价格比。选择时主要考虑以下几点:
合理的结构型式

PLC主要有整体式和模块式两种结构型式
整体式PLC的每一个1/0点的平均价格比模块式的便宜，且体积相对较小，一般用于系统工艺过程较为固定的小型控制系统中，而模块式PLC的功能扩展灵活方便,在1/0点数、输入点数与输出点数的比例、1/ 0模块的种类等方面选择余地大，且维修方便，一般于较复杂的控制系统。

PLC系统的安装方式分为集中式、远程I/O式以及多台PLC联网的分布式。
集中式不需要设置驱动远程]/0硬件，系统反应快、成本低，远程1/0式适用于大型系统，系统的装置分布范围很广，远程1 /0可以分散安装在现场装置附近，连线短，但需要增设驱动器和远程1/0电源;多台PLC联网的分布式适用于多台设备分别立控制，又要相互联系的场合，可以选用小型PLC，但要附加通讯模块。
相应的功能要求
般小型(低档)PLC具有逻辑运算、定时、计数等功能，对于只需要开关量控制的设备都可满足。
对于以开关量控制为主，带少量模拟量控制的系统，可选用能带A /D和D / A转换单元，具有加减算术运算、数据传送功能的增强型低档PLC。
对于控制较复杂，要求实现PID运算、闭环控制、通信联网等功能，可视控制规模大小及复杂程度，选用中档或PLC。但是中、PLC价格较贵，一般用于大规模过程控制和集散控制系统等场合。

5X00594G01 一般用于系统工艺过程较为固定的小型控制系统中

5X00594G01 module
With the development of PLC technology, there are more and more types of PLC products. Different types of PLC, its structural form, performance, capacity, instruction system, programming methods, prices, etc., are also different, and the applicable occasions also have their own focus. Therefore, the reasonable selection of PLC is of great significance for improving the technical and economic indicators of PLC control system.
The selection of PLC should mainly be considered from the PLC model, capacity, I/O module, power module, special function module, communication networking capability and other aspects
PLC model selection
The basic principle of PLC model selection is to meet the functional requirements and reliable, easy maintenance under the premise of striving for the best performance-price ratio. The following points should be considered when choosing:
Reasonable structure type

PLC mainly has two structural types: integral and modular
The average price of each 1/0 point of the integral PLC is cheaper than the modular type, and the volume is relatively small, generally used in the small control system with a relatively fixed system process, and the modular PLC has flexible and convenient function expansion, large choice in 1/0 points, the proportion of input points and output points, the type of 1/0 modules, and easy maintenance. Generally more complex control systems.

The installation mode of PLC system is divided into centralized, remote I/O and distributed with multiple PLC networking.
Centralized does not need to set the drive remote /0 hardware, the system response is fast, low cost, remote 1/0 type is suitable for large systems, the device distribution range of the system is very wide, remote 1/0 can be dispersed in the field near the device, the connection is short, but need to add the driver and remote 1/0 power supply; The distributed network of multiple PLC is suitable for the separate control of multiple devices and the occasion of mutual contact, you can choose a small PLC, but you must attach a communication module.
Corresponding functional requirements
Generally small (low-grade)PLC has logical operation, timing, counting and other functions, which can be met for equipment that only needs switching control.
For the system based on switching quantity control and with A small amount of analog quantity control, an enhanced low-grade PLC with A /D and D/A conversion units, addition and subtraction arithmetic operations and data transmission functions can be selected.
For more complex control, it is required to achieve PID operation, closed-loop control, communication networking and other functions, visual control size and complexity, choose mid-range or PLC. However, the price of PLC is more expensive, and it is generally used in large-scale process control and distributed control systems.