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夢(mèng)之緣
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樓主  發(fā)表于: 2024-07-26 17:02
各位大佬：用ABB變頻器做恒壓供水，不用PLC 的PID控制，改用變頻器自帶的PID功能。請問(wèn)變頻器這邊需設定什么參數，壓力傳感器接到變頻器上了，如何在PLC上顯示實(shí)時(shí)壓力值，壓力設定值又如何從觸摸屏上傳輸到變頻器，是通過(guò)模擬量嗎。
sunzengli
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1樓  發(fā)表于: 2024-07-27 08:26
兩個(gè)方法，一個(gè)是485通訊，或者支持其他通訊也可以，程序處理和調試比較麻煩，另一個(gè)是把變頻器的AO引入PLC的AI，換算即可，大部分變頻器都有AO對應AI的參數，但也要看具體型號，這個(gè)方案勝在直觀(guān)，簡(jiǎn)易，但是要求變頻器要有對應的功能，PLC要有模擬量AI接口。

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