首先，要明确一点，无论是PLC,还是运动控制器、运动控制卡，它们的本质都是一种控制器， 主要负责自动化系统中运动轴的控制，同时也支持输入输出信号的控制。从区别来看，主要有以几点:
1、PLC的专 长在于逻辑IO控制，实现一些复杂的逻辑控制都很容易。对于运动控制，一般低端的PLC主 要是通过高速输出点来进行脉冲控制，幅端PLC-般会通过总线的方式来进行控制， 常用的总线包括Profinet、 EtherCAT、 CC-Link等。
2、运动控制卡通过PCI插槽将控制卡插在PC的主机 上，也可以通过以太网连接到PC主机上;利用高级编程语言C++、C#、VB、 http://NB.NET.labview等编程语言进行开发;编程中使用运动控制卡厂商提供的控制卡API接口函数，来实现对控制卡资源的使用;运动控制卡也分为脉冲型和总线型，-般总线型要比脉冲型稍贵-些。
3、 PLC具有工作可靠,编程简单等优点，但其运动控制功能相对简单。PLC的应用过程中主要通过PLC +HMI, 这就导致可视化界面受到了-定的限制，因此现在基于PLC的上位机应用也越来越广泛;
4、运动控制卡可以利用PC强大的功能， 比如CAD功能、机器视觉功能、软件高级编程等;利用FPGA+DSP / ARM + DSP芯片的功能实现高精度的运动控制(多轴直线、圆弧插补等，运动跟随，PWM控制等)。
5、运动控制器和运动控制卡的算法几乎- 样， 它们之间的主要区别在于运动控制卡需要依赖于PC编程,而运动控制器可以直接写程序拼下载，这样就可以脱机运行。
GDD471A001
Firstly, it should be clarified that whether it is a PLC, motion controller, or motion control card, their essence is a type of controller, mainly responsible for controlling the motion axis in the automation system, and also supporting the control of input and output signals. From the perspective of differences, there are mainly several points:
1. PLC’s expertise lies in logical IO control, which makes it easy to implement some complex logical controls. For motion control, low-end PLCs typically use high-speed output points for pulse control, while amplitude end PLCs typically use buses for control. Commonly used buses include Profinet, EtherCAT, CC Link, etc.
2. The motion control card is inserted into the PC host through a PCI slot, and can also be connected to the PC host through Ethernet; Utilize advanced programming languages C++, C #, VB http://NB.NET.labview Develop using programming languages such as; Use the control card API interface functions provided by the motion control card manufacturer in programming to achieve the use of control card resources; Motion control cards are also divided into pulse and bus types, with the general bus type being slightly more expensive than the pulse type.
3. PLC has the advantages of reliable operation and simple programming, but its motion control function is relatively simple. The application process of PLC mainly relies on PLC+HMI, which limits the visualization interface. Therefore, the application of PLC based upper computers is becoming increasingly widespread;
4. The motion control card can utilize the powerful functions of PC, such as CAD function, machine vision function, advanced software programming, etc; Utilizing the functions of FPGA+DSP/ARM+DSP chips to achieve high-precision motion control (multi axis linear and arc interpolation, motion following, PWM control, etc.).
5. The algorithms of motion controllers and motion control cards are almost the same, and the main difference between them is that motion control cards rely on PC programming, while motion controllers can directly write and download programs, which can be run offline.
GDD471A001
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GDD471A001
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