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搖臂鉆床PLC的特點介紹

2020-07-27 15:20來源:未知瀏覽:

搖臂鉆床PLC的特點介紹

1.PLC的基本組成

可編程控制器PLC的類型

PLC可分整體PLC和模塊PLC.整體式PLC包括OMRON的C20P、C40P、CMP1A、CMP2A,MITSUBISHI的F、FI、F2、FXO、FX1N、FX2N和A、Q系列,日本松下的FP3他的結構示意圖,如下所示

搖臂鉆床PLC結構示意圖

整體PLC是把寄存器、輸入/輸出(I/O)、CPU、電源電路以及通信端口組合在一個機體內;模塊PLC是把上述單元分別做成對應模塊,在應用時依據控制的要求安插在基架上,每個模塊之間經過基架總線進行相互聯系。同時,這類型PLC系統的靈活性高,能夠組成不一樣的控制規模、功能的PLC,可是價格較高。他的基本結構如下:

搖臂鉆床PLC的基本框架圖

 

三菱小型PLC最突出的產品是FX2系列可編程控制器,它擁有著85條功能指令。有輸送比較、程序控制、數據操作、方便指令、高速處理、外部I/O處理和功能塊控制類型。

三菱PLC的新種類——FX2N系列。它在可編程控制器FX2功能指令的基礎上,新加入了浮點數運算、時鐘功能和觸電形比較指令,其數量能夠達到128種298條。

 

2.三菱PLC的指令系統

 

1、輸入繼電器x

可以用輸入繼電器PLC來接收外部所輸入開關信號,和PLC輸入端子相連接3PLC經過光電耦合器,把外部輸入信號讀入,在輸入映象的寄存器中存儲。輸入端能夠外接常開觸點、常閉觸點,也能夠接由多個觸點構成的串、并聯電路和電子傳感器即接近開關。梯形圖中,能夠多次使用輸入繼電器常閉觸點、常開觸點。

2、輸出繼電器Y

可以用輸出繼電器PLC來向外部負載發送信號3輸出繼電器把PLC輸出信號輸送給輸出模塊,后由輸出模塊驅動外部負載,有一對常開觸點和PLC輸出端子相連,具有一定負載能力。

3、輔助繼電器M

PLC輔助繼電器,它的作用和繼電器-接觸器控制中的中間繼電器差不多,可是PLC輔助繼電器是軟件實現,只能依靠程序驅動,各個輔助繼電器能夠有無限對常閉與常開觸點供給編程使用3可是觸點不能夠直接地輸出驅動負載。同時,輔助繼電器有通用型、電池后備型兩種。

4、移位寄存器

由上述的輔助繼電器構成了移位寄存器。移位寄存器的輔助繼電器編號是這個移位寄存器編號。

5、特殊的輔助繼電器

專用的輔助繼電器也就是特殊的輔助繼電器,它共有156個點,可以表示PLC的一些狀態,并提供時鐘脈沖、標志,以及設定PLC運行的方式,或者在步進順控、禁止中斷、設定計數器是加計數器還是減計數上的運用。特殊輔助繼電器有觸點利用型、線圈驅動型。

6、定時器T

PLC定時器扮演著繼電器控制系統中延時繼電器的角色。

7、計數器C

它的計數值是編程器設定K值所決定。

8、狀態器S

狀態器S是編制步進控制程序中的基本元件。

 

 

1. Basic composition of PLC

Types of PLC

PLC can be divided into integral PLC and modular PLC. The integrated PLC includes c20p, C40P, cmp1a, cmp2a of Omron, F, fi, F2, FXO, FX1N, FX2N and a, q series of Mitsubishi, and FP3 of Panasonic of Japan. Its structure diagram is shown below

PLC structure diagram of radial drilling machine

The whole PLC combines registers, input / output (I / O), CPU, power supply circuit and communication port in one machine; module PLC makes the above units into corresponding modules, which are installed on the base frame according to the control requirements, and each module is connected with each other through the base frame bus. At the same time, this type of PLC system has high flexibility, can form different control scale, function PLC, but the price is higher. His basic structure is as follows:

Basic frame diagram of PLC for radial drilling machine

The most outstanding product of Mitsubishi Small PLC is FX2 series programmable controller, which has 85 function instructions. There are transport comparison, program control, data operation, convenient instruction, high speed processing, external I / O processing and function block control.

FX2N series, a new type of Mitsubishi PLC. On the basis of FX2 function instruction of PLC, floating-point operation, clock function and electric shock comparison instruction are added. The number of 128 kinds of 298 instructions can be reached.

2. Instruction system of Mitsubishi PLC

1. Input relay x

The input relay PLC can be used to receive the external input switch signal, which is connected with the PLC input terminal. The 3plc reads the external input signal through the optocoupler and stores it in the input image register. The input terminal can be connected with normally open contact, normally closed contact, series and parallel circuit composed of multiple contacts and electronic sensor, i.e. proximity switch. In the ladder diagram, the normally closed and normally open contacts of input relay can be used many times.

2. Output relay y

The output relay PLC can be used to send signals to the external load. 3. The output relay transmits the PLC output signal to the output module, and then the output module drives the external load. There is a pair of normally open contacts connected with the PLC output terminal, which has a certain load capacity.

3. Auxiliary relay M

The function of PLC auxiliary relay is similar to that of relay contactor control. However, PLC auxiliary relay is realized by software and can only be driven by program. Each auxiliary relay can have unlimited number of normally closed and normally open contacts for programming. 3. However, the contact can not directly output driving load. At the same time, there are two kinds of auxiliary relays: universal relay and battery backup relay.

4. Shift register

The shift register is composed of the auxiliary relay. The auxiliary relay number of the shift register is this shift register number.

5. Special auxiliary relay

The special auxiliary relay is also a special auxiliary relay. It has 156 points in total, which can indicate some states of PLC, provide clock pulse, mark, and set the operation mode of PLC, or use in step sequence control, forbid interrupt, and set whether the counter is added or subtracted. The special auxiliary relay has contact utilization type and coil drive type.

6. Timer t

PLC Timer plays the role of delay relay in relay control system.

7. Counter c

Its count value is determined by the K value set by the programmer.

8. Stater s

The state controller s is the basic element in the program of step control.

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