產(chǎn)品參數(shù) |
品牌 | 西門子 |
產(chǎn)品特性 | 進(jìn)口*** |
是否進(jìn)口 | 否 |
加工定制 | 否 |
工作電壓 | 24VDCV |
輸出頻率 | 50kHz |
產(chǎn)品認(rèn)證 | UL |
系列 | 6ES7 6ES5 |
物料編碼 | 6DS1844-8FA |
運(yùn)輸 | 快遞物流 |
時(shí)效 | 3天- |
快遞費(fèi)用 | 包郵順豐 |
訂貨號 | 6DS1844-8FA |
包裝方式 | 普通包裝 |
可售賣地 | 全國 |
型號 | 6DS1844-8FA | |
6DS1844-8FA控制器
6DS1844-8FA控制器
6DS1844-8FA控制器
PLC的容量選擇 PLC的容量包括I/O點(diǎn)數(shù)和用戶存儲容量兩個(gè)方面。
1.I/O點(diǎn)數(shù)
PLC的I/O點(diǎn)的還比較高,因此應(yīng)該合理 PLC的I/O點(diǎn)的數(shù)量,在滿足控制要求的前提下力爭使用I/O點(diǎn) 少,但必須留有一定的備用量。通常I/O點(diǎn)數(shù)是根據(jù)被控對象的輸入、輸出信號的實(shí)際需要,再加上10%-15%的備用量來確定。
2.用戶存儲容量
用戶存儲容量是指PLC用于存儲用戶程序的存儲器容量。需要的用戶存儲容量的大小由用戶程序的長短決定。
一般可按下式估算,再按實(shí)際需要留適當(dāng)?shù)挠嗔浚?0%-30%)來選擇。
存儲容量=開關(guān)量I/O點(diǎn)總數(shù)X10十模擬量通道數(shù)X100絕大部分PLC均能滿足上式要求。應(yīng)當(dāng)要注意的是:當(dāng)控制系統(tǒng)較復(fù)雜。數(shù)據(jù)處理量較大時(shí),可能會出現(xiàn)存儲容量不夠的問題,這時(shí)應(yīng)特殊對待。
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