RELANCE 45C992 伺服驅(qū)動器
硬件故障改如何檢查?
硬件故障常常表現(xiàn)為以下幾方面
模塊的插件板與總線底板插接不嚴密;
撥碼開關(guān)錯誤;通訊線接線方向錯誤;
終端匹配器未接;
硬件跳線與實際信號要求的類型不一致;
機柜內(nèi)系統(tǒng)電源、現(xiàn)場電源輸出有誤;
硬件本身壞。
以上幾方面問題的結(jié)果表現(xiàn)為：
加電后硬件板極故障(指示燈顯示狀態(tài)不對);
設(shè)備不工作;
系統(tǒng)工作但顯示的對應(yīng)測點值不正確、系統(tǒng)的輸出不能驅(qū)動現(xiàn)場設(shè)備等等。
什么是通訊協(xié)議?
通信協(xié)議是指通信雙方的一種約定。約定包括對數(shù)據(jù)格式、同步方式、傳送速度、傳送步驟、檢糾錯方式以及控制字符定義等問題做出統(tǒng)一規(guī)定，通信雙方必須共同遵守。因此，也叫做通信控制規(guī)程，或稱傳輸控制規(guī)程，它屬于ISO'SOSI七層參考模型中的數(shù)據(jù)鏈路層。和利時支持ProfiBus、FF、CanOpen、Lonworks等
2、現(xiàn)場信號出現(xiàn)問題如何辦?
現(xiàn)場信號的問題主要有以下幾個方面
測量元件壞;
變送器故障;
連線問題，包括信號線接反、松動、脫落、傳輸過程中接地及傳輸過程中受干擾影響耦合出超出系統(tǒng)可以接受的干擾等等。
總之，從信號測量、發(fā)送，到MACS接線端子，這中間任何一個環(huán)節(jié)出錯，所造成的結(jié)果都表現(xiàn)為數(shù)據(jù)顯示有誤。
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.
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:
During the major overhaul, the DCS system should be thoroughly maintained, including
(1) System power outage maintenance, including thorough dust cleaning, wiring modification, and other related tasks.
(2) For problems discovered during daily inspections and regular inspections that cannot be resolved in a timely manner, centralized handling should be carried out, such as system upgrades, configuration downloads, etc.
(3) Before maintenance, the system should backup the DCS system configuration and upload and backup the system operating parameters (such as PID).
(4) During the maintenance period, when changing the configuration, control, and interlocking program, it is necessary to organize responsible persons for process, equipment, electrical, and instrumentation to jointly participate in interlocking debugging and form interlocking debugging records.
The software loading and unloading test is normal, and the communication port and manual operation station are working properly. 3) Various analog and switch input and output channels are working normally. 4) Load the testing software and ensure normal operation for no less than 48 hours. 5) Switching test of redundant modules. 6) After inspection, an inspection record should be filled out and a qualified mark should be affixed.
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