描述

TC-505-02-4M5 實現(xiàn)對工業(yè)設備的自動化控制

TC-505-02-4M5可編程控制器（PLC）的工作原理可以概括為輸入采樣、用戶程序執(zhí)行和輸出刷新三個階段。在輸入采樣階段，PLC以掃描方式順序地讀入所有輸入狀態(tài)和數(shù)據(jù)，并將它們存入I/O映象區(qū)中的相應得單元內。在用戶程序執(zhí)行階段，PLC按由上而下的順序依次地掃描用戶程序(梯形圖)。在掃描每一條梯形圖時，又總是先掃描梯形圖左邊的由各輸入點構成的控制線路，并按先左后右、先上后下的順序對由觸點構成的控制線進行邏輯運算，然后根據(jù)邏輯運算的結果，刷新該邏輯線圈在系統(tǒng)RAM存儲區(qū)中對應位的狀態(tài)；或者刷新該輸出線圈在I/O映象區(qū)中對應位的狀態(tài)；或者確定是否要執(zhí)行該梯形圖所規(guī)定的特殊功能指令。即，在用戶程序執(zhí)行過程中，只有輸入點在I/O映象區(qū)內的狀態(tài)和數(shù)據(jù)不會發(fā)生變化，而其他輸出點和軟設備在I/O映象區(qū)或系統(tǒng)RAM存儲區(qū)內的狀態(tài)和數(shù)據(jù)都有可能發(fā)生變化，而且排在上面的梯形圖，其程序執(zhí)行結果會對排在下面的凡是用到這些線圈或數(shù)據(jù)的梯形圖起作用；相反，排在下面的梯形圖，其被刷新的邏輯線圈的狀態(tài)或數(shù)據(jù)只能到下一個掃描周期才能對排在其上面的程序起作用。在輸出刷新階段，當掃描用戶程序結束后，PLC就進入輸出刷新階段。在此期間，CPU按照I/O映象區(qū)內對應的狀態(tài)和數(shù)據(jù)刷新所有的輸出鎖存電路，再經(jīng)輸出電路驅動相應的外設。這時，才是PLC的真正輸出。

總的來說，TC-505-02-4M5可編程控制器的工作原理是通過不斷地循環(huán)執(zhí)行以上三個階段，實現(xiàn)對工業(yè)設備的自動化控制。同時，由于PLC采用了大規(guī)模集成電路和先進的生產(chǎn)工藝，具有很高的可靠性和穩(wěn)定性，因此被廣泛應用于各種工業(yè)自動化控制系統(tǒng)中。

TC-505-02-4M5 實現(xiàn)對工業(yè)設備的自動化控制

Tc-505-02-4the working principle of the M5 Programmable controller (PLC) can be summarized as three stages: input sampling, user program execution and output refresh. During the input sampling phase, the PLC reads all input status and data sequentially in a scan and stores them in the corresponding cell in the I/O map area. In the execution phase of the user program, the PLC scans the user program in sequence from top to bottom (ladder diagram). When scanning each ladder diagram, it always scans the control line composed of input points on the left side of the ladder diagram first, and carries out logical operations on the control line composed of contacts in the order of first left and then right, first up and then down. Then, according to the results of logical operations, the status of the corresponding bit of the logic coil in the system RAM storage area is refreshed. Or refresh the state of the corresponding bit of the output coil in the I/O map area; Or determine whether to execute the special function instructions specified in the ladder diagram. That is, during the execution of the user program, only the status and data of the input point in the I/O image area will not change, while the status and data of other output points and software devices in the I/O image area or the system RAM storage area are likely to change. The results of the program execution will work on the ladder diagram that uses these coils or data listed below; In contrast, in the ladder diagram below, the status or data of the logic coils that are refreshed can only be useful to the program above it until the next scan cycle. In the output refresh stage, when the scanning user program is finished, the PLC enters the output refresh stage. During this period, the CPU refreshes all output latches according to the corresponding status and data in the I/O map area, and then drives the corresponding peripheral through the output circuit. At this time, is the real output of PLC.

In general, the TC-505-02-4M5 programmable controller works by implementing the above three stages in a continuous cycle to achieve automatic control of industrial equipment. At the same time, due to the use of large-scale integrated circuits and advanced production processes, PLC has high reliability and stability, so it is widely used in various industrial automation control systems.

 

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Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



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