KJ2003X1-BB1輸入輸出模塊,12P3439X012中文PDF使用手冊
兩個相鄰的牽引變電站同時向站內(nèi)同一饋電區(qū)間供電圖1中,r1、r2為整流器裝置,60、70為直流進線隔離開關(guān),10、20、30、40和50為饋線斷路器,61和71為進線斷路器,65和75為負(fù)極斷路器,14、24、34和44為旁路隔離開關(guān),而16、26、36和46為上網(wǎng)隔離開關(guān),813和824為越區(qū)隔離開關(guān),除了旁路隔離開關(guān)和上網(wǎng)隔離開關(guān)之外,所有的保護和測控工作一般均由直流保護裝置(如dpu96)進行監(jiān)視和控制,而對于旁路隔離開關(guān)和上網(wǎng)隔離開關(guān)的監(jiān)視和控制工作將是由s7-200plc來完成,對于每一個饋線開關(guān)來講,
KJ2003X1-BB1輸入輸出模塊均配置一個型號為“6es7 277-0aa2-0xa0”的s7-200plc,該plc主要有8個字節(jié)的輸出和8個字節(jié)的輸入以北京軌道交通五號線為例,變電所自動化系統(tǒng)采用的是南瑞的rt21-sas系統(tǒng),而750v直流開關(guān)柜測控單元s7-200plc與上位機rt21-sas系統(tǒng)的通信接口采用就是Profibus-dp規(guī)約與南瑞的c101通信控制器profibus主站進行連接,c101通信控制器除了s7-200plc進行主從連接外,還提供另一路profibus-dp接口與750v直流開關(guān)柜直流保護測控單元dpu96,每個站設(shè)置2套協(xié)議及光電轉(zhuǎn)換模塊,實現(xiàn)profibus-dp信息的接入。此外,10kv的整流器監(jiān)控單元與rt21-sas系統(tǒng)的通信接口方案也是經(jīng)過profibus-dp規(guī)約與c101通信控制器實現(xiàn)互聯(lián)。所有的現(xiàn)場profibus-dp通信設(shè)備均使用profibus-dp規(guī)約接入南瑞自主研發(fā)的c101通信控制器,c101通信控制器主要目的就是利用profibus-dp通信規(guī)約采集底層現(xiàn)場設(shè)備的數(shù)據(jù),并通過雙can現(xiàn)場總線規(guī)約送往南瑞的pscada總控系統(tǒng)c302,另外,c101還將接受c302的各種控制、查詢命令,對底層profibus-dp現(xiàn)場設(shè)備進行實時監(jiān)控,從而滿足了北京地鐵五號線的750v直流測控的實時數(shù)據(jù)采集、監(jiān)控、繼電保護等各種功能。
實現(xiàn)上,c101通信控制器與底層設(shè)備的數(shù)據(jù)傳輸速率為187.5k,c101做dp的通信主站,周期性的掃描底層設(shè)備,根據(jù)北京地鐵軌道交通公司的要求,c101通信控制器提供兩組Profibus通信接口。其中一組光纖接口連接西門子的直流測控保護裝置dpu96,另一組光纖接口連接西門子的系列S7-200完成對750v直流進線柜、負(fù)極柜、饋線柜一次設(shè)備的實時監(jiān)控功能。之所以采用兩組光纖接口是由于750v直流開關(guān)室與變電所監(jiān)控中心的距離比較遠(一般500~1km),使用電接口將會導(dǎo)致信號衰減以致于誤碼率將會大大提高。
Take the face change as an example: as shown in Figure 1, when the aluminum row is driven by a stepping motor to rotate for one cycle, the row needle rotates with the material in a certain direction by an angle (different according to the selection of the aluminum row). As shown in Figure 2, after the material is changed by turning an angle, the grinding disc erases the material to a plane according to the set height. According to the same principle, the swing angle is controlled by another stepping motor. The whole aluminum bar and the face changing motor rotate together, transfer the material to another swing angle, and then change the face again.
The system is mainly divided into two processes: grinding first, and then polishing the water drill by throwing the disc. In each process, PLC controls the stepping motor to swing the angle, change the surface and lift the main shaft.