RELANCE 45C922 板子模塊卡件
系統(tǒng)上電及測試
（1）啟動工程師站、服務器站、操作站、同時將系統(tǒng)各電源箱依次上電檢查。
（2）檢查各電源箱是否工作正常，電源風扇是否工作，5V、24V指示燈是否正常。
（3）檢查各計算機的系統(tǒng)軟件及應用軟件的文件夾和文件是否正確；硬盤剩余空間無較大變化，并通過磁盤表面測試。
（4）將修改后的組態(tài)進行編譯下載。
（5）從每個操作站實時監(jiān)控的故障診斷中觀察是否存在故障。
（6）打開控制站柜門，觀察卡件是否工作正常，有無故障顯示（FAIL燈亮）。
（7）供電冗余測試
分別開通冗余交流~220VAC總進線的一路，其他交流供電回路失電，但系統(tǒng)應仍然可以正常工作。
分別開通冗余直流電源一路，關閉其他直流電源，測量每一機籠（架）母板電源端子上5V、24V的電壓。
（8）通信冗余測試：分別接通各冗余通訊線的其中一路通訊線（其他通訊線脫開），利用下載組態(tài)功能測試是否正常，如均正常則表明通訊網絡正常。
（9）卡件冗余測試：通過帶電插拔互為冗余的卡件，檢查冗余是否正常。
注意：如果撥出冗余的主控卡、數(shù)據(jù)轉發(fā)卡的其中一塊并插回后，須等數(shù)據(jù)拷貝完成后才可撥另一塊冗余卡，否則在生產過程中會造成嚴重后果。
進行DCS停電維護
（1）操作站、控制站停電吹掃檢修。包括工控機內部，控制站機籠、電源箱等部件的灰塵清理。
（2）針對日常巡檢、定期巡檢中發(fā)現(xiàn)而不能及時處理的故障進行維護及排除。
（3）儀表及線路檢修：包括供電線路、I/O信號線、通訊線、端子排、繼電器、安全柵等。確保各儀表工作正常，線路可靠連接，標識清晰正確。
（4）接地系統(tǒng)檢修。包括端子檢查、各操作站（工控機、顯示器）接地檢查、各控制站（電源、機籠）接地檢查、對地電阻測試。
第四步：現(xiàn)場以及DCS的各項維護工作完成后，檢查確認以下各項重新上電條件是否滿足
（1）首先應聯(lián)系工藝、電氣、設備、儀表等專業(yè)共同確認是否滿足DCS系統(tǒng)的上電條件。
（2）確認電氣提供的總電源符合要求后，合上供電總斷路器，并分別檢查輸出電壓。
（3）合上配電箱內的各支路斷路器，分別檢查輸出電壓。
（4）若配有UPS或穩(wěn)壓電源，檢查UPS或穩(wěn)壓電源輸出電壓是否正常。
Before use, it is necessary to check whether the communication ports, I/O functions, and control algorithm functions meet the requirements before running; Check the module status on the engineer station to ensure it meets the requirements; Load the configuration into the module and check if it is correct. 3. When put into use, the module address and other switches should be set and confirmed by the guardian before inserting the correct module position and filling out the record card. 4. Regular inspections should be conducted every six months on various small quantities of commonly used DCS system spare parts stored in the factory warehouse. The inspection contents are as follows: 1) Surface cleaning, no oil stains on the printed board plug-in, no oil stains on the printed board plug-in, and no abnormalities after slight tapping.
In the use of DCS systems, the management of DCS spare parts is very important. DL/T774-2001 "Guidelines for Operation and Maintenance of Distributed Control Systems in Thermal Power Plants" proposes requirements for DCS spare parts management. Correct management of DCS spare parts involves four aspects: storage requirements, regular inspections, preparation before use, and use. The specific requirements are as follows: 1 The storage requirements for backup modules in the DCS system include: all modules must be packaged in anti-static bags for storage or stored according to the manufacturer's requirements, and the temperature and humidity in the module storage room should also meet the manufacturer's requirements; When accessing modules, anti-static measures should be taken. It is prohibited to touch the circuit board with hands at any time, and registration should be carried out to handle incoming and outgoing procedures.
Minor repair projects
The DCS system minor maintenance shall be carried out along with the unit minor maintenance, and the minor maintenance items shall include the following contents:
1) Clean the dust-proof filter screen of the cabinet and inspect various cooling fans.
2) Check the working status of the power supply and modules.
3) Hardware device function test.
4) Eliminate defects that cannot be handled during operation.
5) Partial on-site equipment maintenance; Partial I/O module verification.
6) Main protection and interlocking test of the unit.