Allen-Bradley 1756-L72是ControlLogix系列可編程自動化控制器(PAC)。它有一個4 MB的用戶內(nèi)存用于數(shù)據(jù)和邏輯，還有0.98 MB的I/O內(nèi)存。控制器配有一個1 GB的SD卡，1784-SD1，您可以將它用作可選的非易失性存儲器。如果存儲空間不夠用，您還可以通過1784-SD2卡將其升級到2 GB。建議將SD卡安裝到控制器上，并且只使用Rockwell Automation出售的sd卡，因為這些sd卡已經(jīng)過充分測試，可與控制器配合使用。使用其他SD卡會帶來數(shù)據(jù)丟失或損壞的風險。SD卡主要用于存儲故障發(fā)生時自動寫入的診斷數(shù)據(jù)。羅克韋爾自動化使用這些數(shù)據(jù)進行故障排除。1756-L72控制器還帶有三個電容儲能模塊。1756-ESMCAP/1756-ESMCAPK是每個控制器中都提供的可拆卸模塊。另一個可移動模塊是1756-ESMNSE/1756-ESMNSEK，它沒有剩余的WallClockTime備用電源。唯一不可拆卸的模塊是1756-ESMNRM/1756-ESMNRMK，它有助于防止USB連接和SD卡的使用，以幫助保護控制器。

1756-L72

Allen-Bradley 1756-L72變頻器的技術(shù)，如果要從教科書上去找理論基礎(chǔ)，可以歸結(jié)到電力電子技術(shù)這一學科。電力電子技術(shù)是借助于半導(dǎo)體功率器件（IGBT一類的）對電能進行轉(zhuǎn)換、控制和優(yōu)化利用的技術(shù)。對銷售或者對公司來說，可以稱為機電一體化的產(chǎn)品。
變頻器的普及，可以理解成一種電源。什么電源呢？我們知道變壓器的作用是起到電壓轉(zhuǎn)換的過程。比如升壓變壓器，降壓變壓器，自耦變壓器等等，甚至電抗器等，輸入電壓和輸出電壓或升高或降低，或不變，實現(xiàn)的都是能量的傳遞。普傳變頻器是通過改變電網(wǎng)的電壓和頻率來實現(xiàn)能量傳遞的一個裝置，所以可以理解成一個電源。工業(yè)中大多的用電要求是三相380伏、50赫茲的，普傳變頻器就是把這個電源調(diào)制成0-380伏，0-50赫茲。
Allen-Bradley 1756-L72從拖動系統(tǒng)的角度來說，一個工藝流程包括控制、驅(qū)動、執(zhí)行、負載這四個環(huán)節(jié)?？刂浦傅檬遣僮鞑糠?，比如上位機，普通操作箱，控制柜、可編程序邏輯控制器等；驅(qū)動就是我們的產(chǎn)品，包括普傳變頻器、伺服電源等；執(zhí)行部分就是電機或者伺服電機；負載就是我們說的什么風機了、水泵了、空壓機了等等。

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