模塊的插件板與總線底板插接不嚴(yán)密;
撥碼開關(guān)錯(cuò)誤;通訊線接線方向錯(cuò)誤;
終端匹配器未接;
硬件跳線與實(shí)際信號(hào)要求的類型不一致;
機(jī)柜內(nèi)系統(tǒng)電源、現(xiàn)場(chǎng)電源輸出有誤;
硬件本身壞。
以上幾方面問(wèn)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(duì));
設(shè)備不工作;
系統(tǒng)工作但顯示的對(duì)應(yīng)測(cè)點(diǎn)值不正確、系統(tǒng)的輸出不能驅(qū)動(dòng)現(xiàn)場(chǎng)設(shè)備等等。
4、軟件報(bào)錯(cuò)，如何處理?
軟件組態(tài)與硬件協(xié)調(diào)有誤出現(xiàn)的問(wèn)題
數(shù)據(jù)庫(kù)點(diǎn)組態(tài)與對(duì)應(yīng)通道連接的現(xiàn)場(chǎng)信號(hào)不匹配;
鼠標(biāo)驅(qū)動(dòng)程序加在COM1口，造成系統(tǒng)在線運(yùn)行時(shí)不能用鼠標(biāo)操作;
打印機(jī)不打印等等。
5、連線接頭改注意哪些問(wèn)題?
連線接頭問(wèn)題
連接頭沒有采用壓焊或焊接不好造成虛焊;
熱循環(huán)使接頭松動(dòng);
螺栓連接點(diǎn)因震動(dòng)引起松動(dòng);
連接點(diǎn)因腐蝕而接觸不良。
6、電源故障改從哪些方面分析?
電源問(wèn)題
電源問(wèn)題分為電源連線問(wèn)題和電源質(zhì)量問(wèn)題。
電源連線問(wèn)題
包括：沒有連線(火、地、零幾項(xiàng)中，其中一項(xiàng)沒接);錯(cuò)誤連線(火線與零線反接，地線與零線反接，地線與零線多點(diǎn)短接)。
This incident was caused by two reasons: one is the excessive control of unnecessary online traffic; The second is the software vulnerability pointed out in an ISS security announcement in 1998.
Since investigators, hackers and security issues are essentially transferred from the IT field, it may be useful to find solutions from there. In the field of it (especially for personal computers), security vulnerabilities are solved by applying security patches. Unfortunately, this leads to the need to cycle multiple patches throughout the product cycle.
For example, Adobe ? Reader 9.0. For example. Between February 2008 and December 2012, Adobe released 33 important security updates for the product. That is, for a single software application, there is a patch every 7 weeks. In addition, most computers have dozens of applications even if they don't have hundreds, so ordinary it computers need to be patched at least once a week (need to be
