RELANCE 604580-1R 處理器模塊
為了驗證上述分析,在停車期間進行了模擬實驗,將2 根HF BUS 總線人為斷開,并對斷開點進行了多種組合。實驗結果沒有重現(xiàn)系統(tǒng)發(fā)生通信故障時的現(xiàn)象,操作站的部分儀表數(shù)據(jù)仍有顯示,通過這些數(shù)據(jù)操作站仍可對現(xiàn)場儀表進行控制。
經(jīng)過分析,認為以下原因可能引發(fā)通信故障:
1) 系統(tǒng)配置過大, CENTUMXL DCS 系統(tǒng)理論上可以配置32 個站, 一般配置不超過50%, 九江廠配置了18個站, 達到了57%。但是國內(nèi)有的廠家配置還大,內(nèi)蒙古化肥廠和蘭州化肥廠DCS配置情況和九江廠完全一樣, 但沒有發(fā)生類似故障。 2) 在 DCS 系統(tǒng)配置畫面中多定義了一個23#站,這是一個空站; 在6#站配置面畫中也多定義了2 個多點模擬量輸入輸出卡MAC2 卡, 有定義通信系統(tǒng)就要對它進行訪問, 必須要加重通信負擔。 3) 尿素裝置DCS 系統(tǒng)存在著缺陷。
上世紀70年代，由于經(jīng)濟的迅速發(fā)展，生產(chǎn)裝置迅速向大型化方向發(fā)展，尤其是石油煉制、冶金、化工、建材、電力等行業(yè)，這些行業(yè)生產(chǎn)裝置的大型化能夠帶來明顯的好處，如生產(chǎn)效率提高、原料消耗減少、勞動力成本降低等。生產(chǎn)設施的大型化要求設備之間具有更好的協(xié)調性，而且停機將帶來更大的損失。因此用戶迫切希望能夠有一種產(chǎn)品或者系統(tǒng)能夠解決生產(chǎn)設施大型化和連續(xù)化所面臨的控制問題。與此同時，在20世紀70年代中期，大規(guī)模集成電路取得突破性的發(fā)展，8位微處理器得到了廣泛的運用，使自動化儀表工業(yè)發(fā)生巨大的變化，現(xiàn)代意義上的DCS也應運而生，1975年Honeywell推出了第一個DCS產(chǎn)品。 中國使用DCS始于1981年，當時吉化公司化肥廠在合成氨裝置中引進了Yokogawa的產(chǎn)品，表現(xiàn)出良好的控制性能和可靠性。隨后中國引進的30套大化肥項目和大型煉油項目都采用了DCS控制系統(tǒng)，提高了生產(chǎn)設施的效率和產(chǎn)品質量的連續(xù)性，并且物耗和能耗也有不同程度的降低。DCS產(chǎn)品在石油和化工行業(yè)的成功應用也促進了其他行業(yè)控制系統(tǒng)的發(fā)展，在隨后的幾年，冶金、建材、電力、輕工等行業(yè)的新建項目中也陸續(xù)使用了DCS產(chǎn)品，并成為這些行業(yè)的主流控制系統(tǒng)。
Pay attention to the situation where all operating stations are powered off
At this time, check if the power indicator light of the control station is normal, and if there is a fault in the card diagnosis indicator light. The red light and green light indicate that the card is working normally. If all of the above are normal, it can be determined that the control station is working normally and the self adjustment system is working normally. However, the operator cannot see the monitoring screen temporarily and cannot perform remote control operations on site. Immediately notify the microcomputer maintenance personnel to repair and go to the site for monitoring.
Pay attention to the situation where all control stations are powered off
Due to the dual power supply of all control station equipment, one UPS and one mains power supply, the probability of this situation occurring is very low.
When the control station is completely powered off, the two system alarm red lights on the monitoring screen light up, communication is interrupted, and all data is not refreshed. All self regulating systems are completely out of control, and the regulating valve will return to its initial state. The air opening valve will be fully closed, and the air closing valve will be fully open. At this time, emergency handling or parking should be carried out immediately, and the operation should be carried out on-site at the same time.
Here are our main products. If you need them, we can send them to help you compare the prices!
Main business: World brand PLC and DCS system spare parts modules
① Allen Bradley (USA AB) series products
② Schneider series products
③ General Electric series products
④ Westinghouse Series Products
⑤ SIEMENS (Siemens series products)
⑥ Selling ABB Robots FANUC Robots, YASKAWA Robots, KUKA Robots, Mitsubishi Robots, OTC Robots, Panasonic Robots, MOTOMAN Robots.
⑦ Westinghouse: OVATION system, WDPF system, MAX0 system spare parts.
⑧ Invensys Foxboro: I/A Series system, FBM (Field Input/Output Module) sequential control, trapezoidal logic control, accident memory processing, analog-to-digital conversion, input/output signal processing, data communication and processing, etc. Invensys Triconex: Redundant fault-tolerant control system, modern fault-tolerant controller based on Triple Modular Redundancy (TMR) structure.
⑨ Siemens: Siemens MOORE, Siemens Simatic C1, Siemens CNC system, etc.
⑩ Bosch Rexroth: Indramat, I/O modules, PLC controllers, drive modules, etc.
◆ Motorola: MVME 162, MVME 167, MVME1772, MVME177 and other series.
PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module, network communication module,
Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output module
Module, redundant module, power module, relay output module, relay input module, processor module.
Our advantage is: brand new original, with a one-year warranty! All products of our company have undergone strict testing. We welcome inquiries and acquisitions. As long as you have sincerity, our company will provide you with a price advantage over peers and work together to win the order.