1756-TBS6H
PLC面板上的指示燈有問題應檢查什么?
1.面板上POWER燈不亮?
主機、I/O擴充機座、I/O擴充模組、特殊模組之正面均有一個 "POWER"之LED指示燈,當主機通上電源時,LED之綠色燈亮。若主機通上電源后,此指示燈不亮,此時,請將"24+"端子之配線拔出,若指示燈正常亮起,表示FX2之DC負載過大,此種情況下,請不要使用 FX2 "24+"端子之DC電源,請另行準備DC24V電源供應器。
若將"24+"端子之配線拔出后,指示燈仍然不亮,有可能PLC內(nèi)部保險絲己經(jīng)燒斷
2.POWER燈呈閃爍狀態(tài)?
假若POWER燈呈閃爍狀態(tài),很有可能是"24+"端子與"COM"端子短路,請將"24+"端子之配線拔出,若是指示燈回復正常,那請檢查您的線路。若指示燈依然閃爍,那很可能PLC內(nèi)的POWER板己經(jīng)出現(xiàn)故障.
3."BATT.“V"LED燈亮
當這個紅色LED燈亮時,表PLC內(nèi)的鋰電池的壽命快結(jié)束了(約剩一個月),此時請盡快更換新的鋰電池,以免PLC內(nèi)的程式(當使用RAM時) 自動消失。
假若更換新的鋰電池之后,此LED燈仍然亮著,那很可能此部PLC的CPU 板己經(jīng)故障.
4."PROG?E"LED燈閃爍
一般來說,當此紅色LED燈閃時,大部份是程式回路不合理的情況較多,另一原因亦有可能是參數(shù)設定出錯,或者是外來之雜訊干擾導致程序內(nèi)容產(chǎn)生變化。若您是使用掌上型書寫器(FX-20P-E)建議您檢查 D8004,再依D8004的內(nèi)容檢查D8060~D8069,從D8060~D8069中可得到一個數(shù)據(jù),此為偵錯號碼。
5."CPU?E"LED燈亮
當"CPU?E"LED燈亮時,有可能是以下幾種原因所造成:
1.PLC內(nèi)部有導電性的粉塵侵入
2.PLC的掃描時超過100ms以上 (檢查D8012即可知道最長執(zhí)行時間)
3.通電中,將RAM/EPROM/EEPROM記憶卡匣拔下。
4.PLC附近有雜訊干擾
若排除上述的問題,而"CPU?E"LED燈仍然亮著的話,此部PLC可能已經(jīng)出現(xiàn)故障.
公司名稱:廈門潤星貿(mào)易有限公司
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