6ES7331-7NF10-0AB0系統(tǒng)結(jié)構(gòu)主要可分為三層：第一層、PC機(jī)與CAN總線接口層----實(shí)現(xiàn)PC機(jī)與CAN通訊總線之間的可視化操作控制，以PC-CAN----智能型CAN總線通訊適配卡實(shí)現(xiàn)；第二層、CAN總線與DSP控制器LF2407接口層----實(shí)現(xiàn)CAN總線和LF2407-A板的CAN控制器的物理接口和通訊；第三層、LF2407的I/O口與步進(jìn)電機(jī)的驅(qū)動(dòng)接口----實(shí)現(xiàn)對(duì)LF2407-A板的電氣隔離保護(hù)和步進(jìn)電機(jī)的大電流驅(qū)動(dòng)，完成電機(jī)的實(shí)際動(dòng)作。

PC機(jī)作為該系統(tǒng)的上位機(jī)，有效的利用PC機(jī)計(jì)算能力強(qiáng)、容量大、人機(jī)界面良好的優(yōu)點(diǎn)。PC-CAN是具有價(jià)格比的智能CAN總線通訊適配卡，它使PC機(jī)方便的連接到CAN總線上，實(shí)現(xiàn)CAN總線與主機(jī)PC的高速數(shù)據(jù)交換。PC-CAN上自帶光電隔離，保護(hù)PC機(jī)避免由于地環(huán)流的損壞，增強(qiáng)系統(tǒng)在惡劣環(huán)境中使用的可靠性。

6ES7331-7NF10-0AB0 

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