?? C500-AD007?? ?
步進電機在具有一定轉(zhuǎn)換方向的驅(qū)動脈沖下運行,據(jù)此將步進電機驅(qū)動器劃分為方向控制和邏輯輸出兩個部分。限位信號用于復(fù)位和限定運行方向,因此在方向控制部分同時處理限位;在邏輯輸出部分,按照控制需求再次劃分為復(fù)位、自動和手動三個邏輯處理模塊,在邏輯輸出的實現(xiàn)方式上,復(fù)位、自動和手動通過一定的優(yōu)先級邏輯,通過發(fā)送電機占用請求復(fù)用邏輯輸出模塊。
爬山復(fù)位模塊用于復(fù)位調(diào)焦鏡頭到爬山搜索的起始位置。步進電機驅(qū)動器在捕獲到指令單元的復(fù)位信號后,按預(yù)定的運行方向產(chǎn)生驅(qū)動邏輯,直至控制器收到限位信號LIMIT的有效反饋后停止。復(fù)位過程中,自動和手動請求無效。
步進電機驅(qū)動器的步數(shù)數(shù)據(jù)接收端DATA在接收到指令單元傳入的運行步數(shù)后,首先檢查當前是否有其他電機占用請求,如果電機空閑,就按照同時傳入的方向信號輸出指定步數(shù)的驅(qū)動邏輯;否則忽略本次自動控制請求。
手動微調(diào)在驅(qū)動器中作為一種輔助控制手段,允許人工微調(diào)調(diào)焦鏡頭的位置。每啟動一次手動微調(diào),電機就按照設(shè)定的運行方向,運行一段固定的微調(diào)距離。驅(qū)動器在捕獲到手動輸入信號后,同時讀取手動運行方向DIRECTION的設(shè)置值,如果當前電機空閑,則按照手動輸入的方向信號輸出固定步數(shù)的驅(qū)動邏輯;否則手動請求無效。
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