20-HIM-A3
20-HIM-A3
若超時，說明不正常，可作相應處理。
如果控制對象的各重要控制環(huán)節(jié)，都用這樣一些看門狗"看"著，那系統(tǒng)的工作將了如指掌，出現(xiàn)了問題，卡在什么環(huán)節(jié)上也很好查找。
還有其它一些監(jiān)控工作可做。對一個復雜的控制系統(tǒng)，特別是自動控制系統(tǒng)，監(jiān)控以至進一步能自診斷是非常必要的。它可減少系統(tǒng)的故障，出了故障也好查找，可提高累計平均*運行時間，降低故障修復時間，提高系統(tǒng)的可靠性。
3.6用于聯(lián)網(wǎng)、通訊
PLC聯(lián)網(wǎng)、通訊能力很強，不斷有新的聯(lián)網(wǎng)的結構推出。
PLC可與個人計算機相連接進行通訊，可用計算機參與編程及對PLC進行控制的管理，使PLC用起來更方便。
為了充分發(fā)揮計算機的作用，可實行一臺計算機控制與管理多臺PLC，多的可達32臺。也可一臺PLC與兩臺或更多的計算機通訊，交換信息，以實現(xiàn)多地對PLC控制系統(tǒng)的監(jiān)控。
PLC與PLC也可通訊。可一對一PLC通訊。可幾個PLC通訊。可多到幾十、幾百。
PLC與智能儀表、智能執(zhí)行裝置（如變頻器），也可聯(lián)網(wǎng)通訊，交換數(shù)據(jù)，相互操作。
◆ 企業(yè)名稱：廈門泰尼電氣有限公司
◆ 企業(yè)性質： 有限責任公司
◆ 主營業(yè)務：DCS,PLC
◆ 經(jīng)營模式： 貿(mào)易
◆ 貿(mào)易地區(qū)： 全國
◆ ： 小廖女士）
◆ ：
◆
◆ :
◆ （備注“01008”收）
◆ ：
◆ 郵政編碼： 361026
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