a．控制單元的冗余
（1）重要的過程單元：CPU（包括存儲器）及電源均應1B1冗余。
（2）在需要時也可選用PLC硬件與熱備軟件構成的熱備冗余系統(tǒng)、2重化或3重化冗余容錯系統(tǒng)等。
b． I/O接口單元的冗余
（1）控制回路的多點I/O卡應冗余配置。
（2）重要檢測點的多點I/O卡可冗余配置。3）根據(jù)需要對重要的I/O信號，可選用2重化或3重化的I/O接口單元。
武漢路易達自動化設備有限公司
聯(lián)系人：李先生
電話：18971414423
固話：027-83238817
傳真：027-61537051
QQ:505528191
地址：武漢市東西湖區(qū)走馬嶺匯通公路港信息交易中
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