1756-L72  A-B PLC控制器 罗克韦尔处理器

Allen-Bradley 1756-L72是ControlLogix系列可编程自动化控制器(PAC)。它有一个4 MB的用户内存用于数据和逻辑，还有0.98 MB的I/O内存。控制器配有一个1 GB的SD卡，1784-SD1，您可以将它用作可选的非易失性存储器。如果存储空间不够用，您还可以通过1784-SD2卡将其升级到2 GB。建议将SD卡安装到控制器上，并且只使用Rockwell Automation出售的sd卡，因为这些sd卡已经过充分测试，可与控制器配合使用。使用其他SD卡会带来数据丢失或损坏的风险。SD卡主要用于存储故障发生时自动写入的诊断数据。罗克韦尔自动化使用这些数据进行故障排除。1756-L72控制器还带有三个电容储能模块。1756-ESMCAP/1756-ESMCAPK是每个控制器中都提供的可拆卸模块。另一个可移动模块是1756-ESMNSE/1756-ESMNSEK，它没有剩余的WallClockTime备用电源。唯一不可拆卸的模块是1756-ESMNRM/1756-ESMNRMK，它有助于防止USB连接和SD卡的使用，以帮助保护控制器。

1756-L72

Allen-Bradley 1756-L72变频器的技术，如果要从教科书上去找理论基础，可以归结到电力电子技术这一学科。电力电子技术是借助于半导体功率器件（IGBT一类的）对电能进行转换、控制和优化利用的技术。对销售或者对公司来说，可以称为机电一体化的产品。
变频器的普及，可以理解成一种电源。什么电源呢？我们知道变压器的作用是起到电压转换的过程。比如升压变压器，降压变压器，自耦变压器等等，甚至电抗器等，输入电压和输出电压或升高或降低，或不变，实现的都是能量的传递。普传变频器是通过改变电网的电压和频率来实现能量传递的一个装置，所以可以理解成一个电源。工业中大多的用电要求是三相380伏、50赫兹的，普传变频器就是把这个电源调制成0-380伏，0-50赫兹。
Allen-Bradley 1756-L72从拖动系统的角度来说，一个工艺流程包括控制、驱动、执行、负载这四个环节。控制指得是操作部分，比如上位机，普通操作箱，控制柜、可编程序逻辑控制器等；驱动就是我们的产品，包括普传变频器、伺服电源等；执行部分就是电机或者伺服电机；负载就是我们说的什么风机了、水泵了、空压机了等等。

1756-L72

Allen-Bradley 1756-L72 is the ControlLogix family of programmable automation controllers (PACs). It has a user memory of 4 MB for data and logic, and 0.98 MB of I/O memory. The controller comes with a 1 GB SD card, 1784-SD1, which you can use as optional non-volatile memory. If you run out of storage space, you can also upgrade it to 2 GB with the 1784-SD2 card. It is recommended to install sd cards to the controller and only use sd cards sold by Rockwell Automation as these have been fully tested to work with the controller. Using other SD cards carries the risk of data loss or corruption. The SD card is mainly used to store diagnostic data that is automatically written when a fault occurs. Rockwell Automation uses this data for troubleshooting. The 1756-L72 controller also comes with three capacitive energy storage modules. The 1756-ESMCAP/1756-ESMCAPK is a detachable module provided in each controller. Another removable module is the 1756-ESMNSE/1756-ESMNSEK, which has no remaining WallClockTime backup power. The only non-detachable module is the 1756-ESMNRM/1756-ESMNRMK, which helps prevent USB connections and the use of SD cards to help protect the controller.
Allen-Bradley 1756-L72 inverter technology, if you want to find the theoretical basis from the textbook, can be attributed to the subject of power electronics technology. Power electronics technology is a technology to convert, control and optimize the utilization of electric energy by means of semiconductor power devices (IGBTs). For sales or for the company, it can be called mechatronics products.
The popularity of inverter can be understood as a power supply. What power source? We know that the role of transformers is to play a voltage conversion process. For example, boost transformers, step-down transformers, autotransformers, etc., and even reactors, the input voltage and output voltage or increase or decrease, or unchanged, to achieve the transfer of energy. Universal frequency converter is a device that realizes energy transfer by changing the voltage and frequency of the power grid, so it can be understood as a power supply. Most of the power requirements in the industry are three-phase 380 volts and 50 Hertz, and the general transmission frequency converter is to adjust this power supply to 0-380 volts and 0-50 Hertz.
Allen-Bradley 1756-L72 From the point of view of the drive system, a process flow includes four links: control, drive, execution and load. Control refers to the operation part, such as the upper computer, ordinary operation box, control cabinet, programmable logic controller, etc.; Drive is our products, including general transmission frequency converter, servo power supply, etc. The actuator is the motor or servo motor; The load is what we say about the fan, the pump, the air compressor, and so on.

1756-L72