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and what’s worse you may find out many bad habits of your partner, which never appear when you are first in love before the marriage. It seems that many faults turn up after you truly living together and see each other’s face the moment you open your eyes in the early morning. But after almost 4 years from now, I do not feel any negative change in our relationship. During all these years, we know each other better and we bee more tolerant about each other and I realize that if you really love a person you will accept his imperfect. And what is the qualification of a good husband? Once I was chatting with my colleague about this issue. And one of the qualifications I thought was that he must be a good cook. But to my surprise, my colleague said that a good husband must be someone who makes big money. What made her think so was quite beyond me. Maybe I am not sophisticated enough and what I want is just simple life style. The most enjoyable thing is that we go to the market to buy vegetables and other daily stuffs if we both have time. Maybe he is a housebound husband and I love housebound man. And there is another reason why We love going to the market. That is because we sometimes will get some surprises. The surprise is saving little fish which are disserted by the fish mongers. Because these fish are swellfish. Then we will collect them and set them free into the river. Swellfish are lovely creature. When they look like a little submarine when they are swimming in the water and look like a meat ball when you hold them in your hand. And if they are scared, they will swell and look like a little ball. Every time we see them swim away and we feel their happiness of returning home and this also make us cherish life. Maybe some will consider these behavior as something childish. Well, that is fine with us. We love doing these together and feel happy that is what it is all about. My dear hubby is a kind hearted man and he love animals just as I do. I am lucky to have someone who can be both my intimated soul mate and my forever friend. 。s Day on February 14, characterized by bouquets of roses, chocolates and romantic candlelight dinners, than they do about their homegrown day for lovers. Even Qixi is nowadays referred to as the Chinese Valentine39。s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。同時我也從各位老師哪里學到了許多做人的原則,這些將有益 于 我的終生。從題目選定到論文的制作完成,工作過程是艱辛的,但是成果是令人欣慰的。這就是在正常情況下的停車與開車。每臺電機啟動時間定時器分別采用定時器 TIM000(T000)、TIM001(T001) 、 TIM002(T002) 控 制 , 停 止延 時 定 時 器 用 TIM003(T003) 、TIM004(T004)、 TIM005(T005)控制。當需要皮帶輸送機停止時,只需要按下停車按鈕 SB2,則 M1 立即停止,接著每隔 30S 依次停下 M M M4 電機。 陽泉學院 第 10 頁 共 16 頁 控制系統(tǒng)的軟件設計 根據(jù)工藝要求和用戶使用需要,同時考慮到設備使用的安全性,故障保護與報警 狀態(tài)顯示的要求 ,以 及實現(xiàn)系統(tǒng)各設備協(xié)調工作的功能, 用梯形圖編制整個控制程序。 3) 交流接觸器的觸點容量根據(jù)電動機容量確定 ,所有接觸器線圈的控制電壓為 220VAC。 一般情況下輸入點與輸入信號,輸出點 與輸出信號在控制上一一對應,分配好以后,按系統(tǒng)配置的通道與接點信號分配給每一個輸入信號和輸出信號,在本系統(tǒng)中報警器是幾個信號共用一個輸出點,個報警因素按邏輯關系并聯(lián)后接到報警輸出點,I/O 分配表如下表 1 所示: 陽泉學院 第 8 頁 共 16 頁 輸入 啟動按鈕 SB1 停車按鈕 SB2 故障點 SB SB4 、 SB5 、 SB6 地址 00000 00001 0000 0000 0000 00006 輸出 報警指示燈 HA 停車輸出點 TA 故障輸出 M1 M2 M3 M4 地址 01004 01005 01006 01007 01008 01009 輸 出 電機運行 M4 M3 M2 M1 地 址 01000 01001 01002 01003 表 1 I/O 分配表 PLC 外圍硬件電路設計與硬件電路圖 PLC 外圍硬件電路圖(見圖 3) SB1 為啟動按 鈕(地址 00000), SB2 為停止按鈕(地址 00001), SB3…… SB6為四臺電機對應的故障信號(電機正常時為常開,故障時為常閉), 01004 為故障報警輸出,當任何一臺電機發(fā)生故障時, HA 便開始報警,電機故障信號由熱繼電器 FR 和空氣開關 QF 的輔助觸點串聯(lián)后輸出的 。 3) 高速計數(shù)器功能: CPM2A/2C 支持單軸高速計數(shù) 20KHZ 單相和 5KHZ 雙向, 線性計算從 8388608 到 388607,25KHZ 的四軸高速計算等。 陽泉學院 第 7 頁 共 16 頁 控制系統(tǒng)硬件電路的設計 2. 1 PLC 的選擇及 I/O 分配表 輸入信號: 啟動開關 1 個 停車開關 1 個 故障輸入 4 個 ( M M M M4) (注:這里不考慮跑偏開關、張力保護器、物料探測器等) 以上共 6 個輸入的開關量信號,考慮以后的擴充,預留 50%的備用點,共 9個數(shù)字量輸入點 DI。 2) 速度:傳統(tǒng)的繼電器控制邏輯是依靠觸電的機械動作實現(xiàn)控制的,工作速度低、毫秒級的、且機械觸點有抖動現(xiàn)象; PLC 控制是由程序指令控制電子電路來實現(xiàn)的,速度快、微妙級、嚴格同步且無抖動現(xiàn)象。