RELANCE 57C330C 接口模塊
故障維維護(hù) 系統(tǒng)在發(fā)生故障后應(yīng)進(jìn)行被動(dòng)性維護(hù),主要包括以下工作: 3.3.1 專(zhuān)業(yè)性維護(hù) 一般需廠(chǎng)商或廠(chǎng)家指定的維護(hù)工程師來(lái)進(jìn)行維護(hù)。
用戶(hù)一般性維護(hù) 系統(tǒng)使用者自身進(jìn)行的日常維護(hù),維護(hù)人員應(yīng)對(duì)系統(tǒng)維護(hù)技術(shù)難度和可操作性有一定的認(rèn)識(shí),了解應(yīng)具備的維護(hù)工具,明確哪些工作能自己完成,做到心中 有數(shù),出現(xiàn)問(wèn)題要及時(shí)制定可行的維護(hù)方案。對(duì)DCS系統(tǒng)故障維護(hù)的關(guān)鍵是快速、準(zhǔn)確地判斷出故障點(diǎn)的位置，故障維護(hù)中的一些經(jīng)驗(yàn)總結(jié)如下下幾點(diǎn)：
1） DCS系統(tǒng)往往具有豐富的自診斷功能。根據(jù)報(bào)警,可以直接找到故障點(diǎn),并且還可通過(guò)報(bào)警的消除來(lái)驗(yàn)證維修結(jié)果。
2） 通信接頭接觸不良會(huì)引起通信故障,確認(rèn)通信接頭接觸不良后,可以利用工具重做接頭;通信線(xiàn)破損應(yīng)及時(shí)更換。
3） 某個(gè)卡件故障燈閃爍或者卡件上全部數(shù)據(jù)都為零,可能的原因是組態(tài)信息有錯(cuò)、卡件處于備用狀態(tài)而冗余端子連接線(xiàn)未接、卡件本身故障、該槽位沒(méi)有組態(tài)信息等。
當(dāng)某一生產(chǎn)狀態(tài)異?；驁?bào)警時(shí),我們可以先找到反映此狀態(tài)的儀表,然后順著信號(hào)向上傳遞的方向,用儀器逐一檢查信號(hào)的正誤,直到查出故障所在。
當(dāng)出現(xiàn)較大規(guī)模的硬件故障時(shí)，最大的可能是由于DCS系統(tǒng)環(huán)境維護(hù)不力而造成的系統(tǒng)運(yùn)故障，除當(dāng)時(shí)采取緊急備件更換和系統(tǒng)清掃工作外，還要及時(shí)和廠(chǎng)家取得聯(lián)系，由廠(chǎng)家專(zhuān)業(yè)技術(shù)支持工程師進(jìn)一步確認(rèn)和排除故障。
結(jié)束語(yǔ)對(duì)于DCS系統(tǒng)的維護(hù)工作,關(guān)鍵是要做到預(yù)防第一,作為系統(tǒng)維護(hù)人員應(yīng)根據(jù)系統(tǒng)配置和生產(chǎn)設(shè)備控制情況,制定科學(xué)、合理、可行的維護(hù)策略和方式方法,做到預(yù)防性維護(hù)、日常維護(hù)緊密配合,進(jìn)行系統(tǒng)的、有計(jì)劃的、定期的維護(hù),保證系統(tǒng)在要求的環(huán)境下長(zhǎng)期良好地運(yùn)行,使生產(chǎn)過(guò)程控制平穩(wěn)、運(yùn)行穩(wěn)定,為實(shí) 現(xiàn)生產(chǎn)和效益的目標(biāo),提供可靠保證
After a malfunction occurs, the fault maintenance system should undergo passive maintenance, mainly including the following tasks: 3.3.1 Professional maintenance generally requires the manufacturer or a maintenance engineer designated by the manufacturer to carry out maintenance.
3.3.2 General Maintenance of Users The daily maintenance carried out by the system users themselves should have a certain understanding of the technical difficulty and operability of system maintenance, understand the maintenance tools that should be available, clarify which tasks can be completed on their own, and have a clear understanding. If problems arise, feasible maintenance plans should be formulated in a timely manner. The key to maintaining DCS system faults is to quickly and accurately determine the location of the fault point. Some experiences in fault maintenance can be summarized as follows:
DCS systems often have rich self diagnostic functions. Based on the alarm, the fault point can be directly identified, and the maintenance results can also be verified by eliminating the alarm.
2) Poor contact of communication connectors can cause communication faults. After confirming poor contact of communication connectors, tools can be used to redo the connectors; If the communication line is damaged, it should be replaced in a timely manner.
3) The flashing fault light of a certain card or all data on the card being zero may be due to incorrect configuration information, the card being in a standby state with redundant terminal connection wires not connected, the card itself malfunctioning, or the lack of configuration information in that slot.
When a certain production status is abnormal or an alarm occurs, we can first find the instrument that reflects this status, and then use the instrument to check the correctness of the signal one by one along the direction of signal transmission until the fault is identified.
When a large-scale hardware failure occurs, the most likely cause is the system operation failure due to poor maintenance of the DCS system environment. In addition to emergency spare parts replacement and system cleaning work, it is also necessary to contact the manufacturer in a timely manner, and have the manufacturer's professional technical support engineer further confirm and eliminate the fault.
Conclusion: For the maintenance work of DCS system, the key is to prioritize prevention. As system maintenance personnel, they should develop scientific, reasonable, and feasible maintenance strategies and methods based on system configuration and production equipment control, achieve close coordination between preventive maintenance and daily maintenance, and carry out systematic, planned, and regular maintenance to ensure that the system operates well in the required environment for a long time, ensuring smooth production process control Stable operation, providing reliable assurance for achieving production and efficiency goals