RELANCE 57C652 通用驅(qū)動
3 次故障現(xiàn)象大致相同,兩套系統(tǒng)所有操作站和各自的控制站、 監(jiān)視站通信全部中斷?？刂普竟ぷ髡?操作站則完全喪失了操作和監(jiān)視功能,畫面中凡是顯示儀表數(shù)據(jù)的位置都以星號代替,畫面可以翻頁,計時器仍在計時,狀態(tài)說明操作站自身工作是正常的。故障現(xiàn)象不同之處主要表現(xiàn)在: 第1 次故障發(fā)生時, 操作站系統(tǒng)條件畫面HF BUS 總線由綠變紅, 顯示總線故障。而后 2 次故障發(fā)生時,HF BUS 總線則顯示正常。 第1 次故障發(fā)生時,尿素裝置21#控制站的控制卡件進行了切換;第2次故障發(fā)生時, 尿素裝置 22#控制站的控制卡件進行了切換; 而在第 3 次故障發(fā)生時 21#站和22#站的控制卡件同時發(fā)生切換。合成氨裝置 6個控制站則始終工作正常。DCS 正常運行和故障期間收集到了大量的通信故障報警信息?，F(xiàn)將第2 次通信故障發(fā)生前幾個月和故障發(fā)生時出現(xiàn)的報警信息列入表1中?；诘? 次通信故障發(fā)生時,系統(tǒng)條件畫面顯示總線故障信息, 認(rèn)為HF BUS 總線是冗余的,只有當(dāng)2 根總線同時遭到破壞通信才會中斷。
上世紀(jì)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(shè)施的大型化要求設(shè)備之間具有更好的協(xié)調(diào)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(shè)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(jì)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(yīng)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(dāng)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(shè)施的效率和產(chǎn)品質(zhì)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(yīng)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.