【導讀】設(shè)計方法也開始多種多樣，從而使全自動洗衣機顯得更加。器控制系統(tǒng)電氣原理圖編制的梯形圖語言進行程序設(shè)計，編程容易，功能擴展方便，修改靈活,而且結(jié)構(gòu)簡單，抗干擾能力強。本文選擇三菱FX2N-24MR為核心部件，著重進行硬件接口設(shè)計，

　　

【正文】 can39。t is tolerant of. New technique always for bringing more safe and convenient operation for us, make we a lot of problems for face on sweep but light, do you understand the HMI? Says the HMI here you basically not clear what it is, also have no interest understanding, change one inside text explains it into the touch to hold or manmachine interface you knew, and it bines with the PLC to our larger space. When we are work a work piece, giving the PLC a signal, counting PLC inner part the machine add 1 to pute us for a day of workload, a count the machine and can solve problem in brief, certainly they also can keep the data under the condition of dropping the electricity, urging the data not to throw to lose, this is also what we hope earnestly. The PLC still has the function that the high class counts the machine, being us while accept some dates of high speed, the high speed that here say is the data of the in all aspects tiny second class, for example the bar code scanner is scanning the data continuously, calculating highspeed signal of the data processor DSP etc., we will adopt the high class to count the machine to help we carry on count. It at the PLC carries out the procedure once discover that the high class counts the machine to should of interruption, will let go of the work on the hand immediately. The trapezoid diagram procedure that passes by to weave the distance again explains the high class for us to carry out procedure to count machine would automatic performance to should of work, thus rise the Class that the high class counts the ma chine to high one Class. You heard too many this phrases perhaps: crash, the meaning that is mostly is a workload of CPU to lead greatly, the internal resources shortage etc. the circumstance can39。t result in procedure circulate. The PLC also has the similar circumstance, there is a watchdog WDT in the inner part of PLC, we 聯(lián)系 Q709604208 獲取 can establish time that a procedure of WDT circulate, being to appear the procedure to jump to turn the mistake in the procedure movement process or the procedure is busy, movement time of the procedure exceeds WDT constitution time, the CPU turn but the WDT reset the appearance. The procedure restarts the movement, but will not carry on the breakage to the interruption. The PLC development has already entered for work ages of correspondence from the mode of the one, and together other works control the plank and I/ O card planks to carry on the share easily. A state software can pass all se hardwires link, more animation picture of keep the view to carries on the control, and cans pass the Inter to carry on the control in the foreign land, the blastoff that is like the absolute being boat is to adopt this kind of way to make airship go up the sky. The development of the higher layer needs our continuous effort to obtain. The PLC emergence has already affected a few persons fully, we also obtained more knowledge and precepts from the top one experience of the generation, ing to the continuous development PLC technique, push it toward higher wave tide. Knowing the available PLC work options and their best applications will ensure an efficient and flexible control system design. The programmable logic controller39。s (PLC39。s) ability to support a range of munication methods makes it an ideal control and data acquisition de vice for a wide variety of industrial automation and facility control applications. However, there is some confusion because so many possibilities exist. To help eliminate this confusion, let39。s list what munications are available and when they would be best applied. To understand the PLC39。s munications versatility, let39。s first define the terms used in describing the various systems. ASCII: This stands for American Standard Code for Information Interchange. As shown in Fig. 1, when the letter A is transmitted, for 聯(lián)系 Q709604208 獲取 instance, it39。s automatically coded as 65 by the sending equipment. The receiving equipment translates the 65 back to the letter A. Thus, different devices can municate with each other as long as both use ASCII code. ASCII module: This intelligent PLC module is used for connecting PLCs to other devices also capable of municating using ASCII code as a vehicle. Bus topology: This is a linear local area work (LAN) arrangement, as shown in Fig. 2A, in which individual nodes are tapped into a main munications cable at a single point and broadcast messages. These messages travel in both directions on the bus from the point of connection until they are dissipated by terminators at each end of the bus. CPU: This stands for central processing unit, which actually is that part of a puter, PLC, or other intelligent device where arithmetic and logical operations are performed and instructions are decoded and executed. Daisy chain: This is a description of the connection of individual devices in a PLC work, where, as shown in Fig. 3, each device is connected to the next and munications signals pass from one unit to the next in a sequential fashion. Distributed control: This is an automation concept in which portions of an automated system are controlled by separate controllers, which are located in close proximity to their area of direct control (control is decentralized and spread out over the system). Host puter: This is a puter that39。s used to transfer data to, or receive data from, a PLC in a PLC/puter work. Intelligent device: This term describes any device equipped with its own CPU. I/O: This stands for inputs and outputs, which are modules that handle data to the PLC (inputs) or signals from the PLC (outputs) to an external device. Kbps: This stands for thousand bits per second, which is a rate of measure for electronic data t