6ES7902-1AC00-0AA0 RS232電纜 10m

PLC以開(kāi)關(guān)量方式控制變頻器的硬件連接

變頻器有很多開(kāi)關(guān)量端子，如正轉(zhuǎn)、反轉(zhuǎn)和多檔轉(zhuǎn)速控制端子等，不使用PLC時(shí)，只要給這些端子接上開(kāi)關(guān)就能對(duì)變頻器進(jìn)行正轉(zhuǎn)、反轉(zhuǎn)和多檔轉(zhuǎn)速控制。當(dāng)使用PLC控制變頻器時(shí)，若PLC是以開(kāi)關(guān)量方式對(duì)變頻進(jìn)行控制，需要將PLC的開(kāi)關(guān)量輸出端子與變頻器的開(kāi)關(guān)量輸入端子連接起來(lái)，為了檢測(cè)變頻器某些狀態(tài)，同時(shí)可以將變頻器的開(kāi)關(guān)量輸出端子與PLC的開(kāi)關(guān)量輸入端子連接起來(lái)。

PLC以開(kāi)關(guān)量方式控制變頻器的硬件連接如下圖所示。當(dāng)PLC內(nèi)部程序運(yùn)行使Y001端子內(nèi)部硬觸點(diǎn)閉合時(shí)，相當(dāng)于變頻器的STF端子外部開(kāi)關(guān)閉合，STF端子輸入為ON，變頻器啟動(dòng)電動(dòng)機(jī)正轉(zhuǎn)，調(diào)節(jié)10、2、5端子所接電位器可以改變端子2的輸入電壓，從而改變變頻器輸出電源的頻率，進(jìn)而改變電動(dòng)機(jī)的轉(zhuǎn)速。如果變頻器內(nèi)部出現(xiàn)異常時(shí)，A、C端子之間的內(nèi)部觸點(diǎn)閉合，相當(dāng)于PLC的X001端子外部開(kāi)關(guān)閉合，X001端子輸入為ON。

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USHIO CONTROLLER, SYSTEM 9606355

ACCRETECH USA INC ASSY, B.B.D. (W/OPTICAL FIBER 225300

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