DCS系統(tǒng)由多臺(tái)計(jì)算機(jī)分別控制生產(chǎn)過程中多個(gè)控制回路,同時(shí)又可集中獲取數(shù)據(jù)、集中管理和集中控制的自動(dòng)控制系統(tǒng)。分布式控制系統(tǒng)采用微處理機(jī)分別控制各個(gè)回路,而用中小型工業(yè)控制計(jì)算機(jī)或高性能的微處理機(jī)實(shí)施上一級(jí)的控制。
DCS系統(tǒng)在檢修的過程中需要做好以下幾點(diǎn)工作:
1、DSC3.1-030-220檢查環(huán)境條件。電子設(shè)備室、工程師室內(nèi)和環(huán)境溫度、濕度、清潔度,應(yīng)符合有關(guān)規(guī)程或生產(chǎn)廠家的規(guī)定;集控室內(nèi)光線充足,具備操作員操作監(jiān)視的條件。
2、DSC3.1-030-220外觀檢查。檢查系統(tǒng)設(shè)備的外觀應(yīng)完好,無缺件、銹蝕、變形和明顯的損傷。有電源回路的電源熔絲和模件的通道熔絲應(yīng)符合使用設(shè)備的要求;如有損壞應(yīng)作好記錄,并予以更換。各系統(tǒng)設(shè)備應(yīng)擺放整齊,各種標(biāo)識(shí)應(yīng)齊全、清晰、明確。
3、必須在系統(tǒng)或設(shè)備停電后進(jìn)行設(shè)備的清掃工作。
4、DSC3.1-030-220對(duì)于有防靜電要求的設(shè)備,檢修時(shí)必須作好防靜電工作,工作人員必須帶好防靜電接地畹帶,并盡可能不觸電及電路部分;設(shè)備應(yīng)放在防靜電板上,吹掃用設(shè)備應(yīng)接地,以防止靜電放電損壞設(shè)備。
5、清潔用吸塵器必須有足夠大的功率,以便及時(shí)吸走揚(yáng)起的灰塵。設(shè)備清洗必須使用專用清洗劑。清潔要使用潔凈的儀用空氣進(jìn)行,氣源管前部禁止用金屬管子,毛刷應(yīng)經(jīng)常對(duì)地放電,吹出的灰塵要用吸塵器吸凈,避免腐蝕電路板,更要防止產(chǎn)生靜電。
6、檢查各設(shè)備內(nèi)外的各部件應(yīng)安裝牢固無松動(dòng),安裝螺釘齊全。電纜敷設(shè)捆扎整齊美觀,標(biāo)志齊全清晰。
7、電源線路及元件的處理。電源線路及元件也要按清潔和吹掃模件的方法進(jìn)行清掃,組裝后進(jìn)行性能測(cè)試。
8、DSC3.1-030-220帶有冷卻風(fēng)扇的,一定要檢查冷卻風(fēng)扇工作是否正常,并對(duì)其清洗和吹掃或更新,以防DCS運(yùn)行中因冷卻風(fēng)扇故障,引起機(jī)柜溫度過高,誘發(fā)模件故障。
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DSC3.1-030-220
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