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在設(shè)備中，有的出料傳送帶需要設(shè)計(jì)成來(lái)料時(shí)啟動(dòng)，來(lái)料終止后過幾秒停止。梯形圖如下：


                                  X15                                                     T10                                                                                            Y16
----------------------------▏     ▏------------------------------------------▏ /    ▏-------------------------------------------------------------------------（          ）
                               來(lái)料時(shí)ON      ▏                                    無(wú)料計(jì)時(shí)                                                                                    傳送帶啟動(dòng)
                                                     ▏
                     Y16                         ▏                       X15                                                                                                                           K50
-----------------▏      ▏--------------------------------------▏  /   ▏----------------------------------------------------------------------------------------（ T10     ）
                傳送帶啟動(dòng)自鎖                                  無(wú)料時(shí)閉合                                                                                                   無(wú)料計(jì)時(shí)


                                    傳送帶可由受Y16控制的變頻器驅(qū)動(dòng)。以上，僅供參考。